TT Technologies GRUNDOMAT P Boring tool Operators & Parts Manual

UNDERGROUND

BORING

TOOL

GRUNDOMAT Model - P

Operators & Parts Manual

Part No. 70767-07

Table of Contents

Safety Section

1.

Safety Information about the GRUNDOMAT . . . . . . . . . . . . .4-7

Operations

1.

2.

3.

4.

5.

6.

7.

Introduction to GRUNDOMAT . . . . . . . . . . . . . . . . . . . . . . . . . .8

Operation of the GRUNDOMAT

Connection to a Compressor . . . . . . . . . . . . . . . . . . . . . . .8

Lubrication Operation and Adjustment . . . . . . . . . . . . . . . .9

Aligning and Starting the GRUNDOMAT . . . . . . . . . . . . .10

General Instructions for Operation . . . . . . . . . . . . . . . . . .11

The Reversing Mechanism . . . . . . . . . . . . . . . . . . . . . . .11

Factors Affecting Accuracy . . . . . . . . . . . . . . . . . . . . . . .12

Attachments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Laying of Cables and Pipe

Solo Boring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Pipe Pulling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Sleeve Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Pipe Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Special Applications

Vertical boring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Threadlocking & Bonding . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

2

TT Technologies, Inc. • www.tttechnologies.com • e-mail: [email protected] • Phone: 800-533-2078

General Maintenance Procedures

1.

Procedures & Equipment

2.

3.

4.

5.

Spanner Wrenches . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Loctite Thread Sealing . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Securing the GRUNDOMAT Using the Repair Stand . . .19

Head Assembly

Removal of the Stepped Cone . . . . . . . . . . . . . . . . . . . . .20

Removing the Casing Tip . . . . . . . . . . . . . . . . . . . . . . . . .20

Assembly of the Head Assembly . . . . . . . . . . . . . . . . . . .21

Control Assembly

Servicing the Whip Hose (45-110 models) . . . . . . . . . . .24

Control Stud Disassembly (45-110 models) . . . . . . . . . .24

Control Stud Re-Assembly (45-110 models) . . . . . . . . . .26

Servicing the Whip Hose (130-180 models) . . . . . . . . . .27

Control Stud Disassembly (130-180 models) . . . . . . . . .28

Control Stud Re-Assembly (130-180 models) . . . . . . . . .30

Piston

Piston Removal All Tools . . . . . . . . . . . . . . . . . . . . . . . . .32

Piston Assembly All Tools . . . . . . . . . . . . . . . . . . . . . . . .32

Function Test

Check the Piston . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Check Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Part Number Listings

1-6

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34-42


3

1.

Important Safety Instructions

This symbol calls attention to important safety instructions which, if not followed, could result in serious personal injury or death.

Read, understand and observe all safety information and instructions in this manual, and on safety decals on the GRUNDOMAT piercing tool before using it. For safety reasons, read the operators manual carefully and exercise caution while using the

GRUNDOMAT piercing tool. Please note specific safety requirements as explained by procedures called out in this manual. Failure to follow these instructions could result in serious personal injury or death.

All tools, materials and equipment manufactured and supplied by TT Technologies, Inc.

are designed to be used by qualified and trained personnel only. TT Technologies, Inc.

will not be held liable for any injury or damage to either people or property resulting from the misuse of TT Technologies equipment.

Please save this user's guide for future reference and have it available to all operating personnel.

4

WEAR EAR

PROTECTION

WEAR SAFETY

GLASSES

WEAR SAFETY

SHOES

WEAR SAFETY

GLOVES

WEAR

HARD HAT

DANGER:

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. This signal Word should be used in the most extreme situations.

WARNING:

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION:

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

SAVE THESE INSTRUCTIONS


GRUNDOMAT is manufactured to the current technical safety-relevant regulations.

Nevertheless, the use of the machine may represent a danger to the health and life of users or third parties. Always ensure that you pay particular attention to warnings, safety labels and instructions.

Call Before You Dig!

Check the existence and exact position of buried pipe and cables by contacting the respective utilities or owners of networks. The exact and definite existence and position of buried cables and pipes should be defined by trial pits or using cable and pipe detection equipment or other means.

Cable Strike!

Should you accidently hit an electrical cable, immediately leave the site, ensure no one enters and contact the electrical company to turn off the supply.

In case of a cablestrike, the danger resulting from that damaged electric cable can only be evaluated following detailed information by the respective electrical company. Never rely on your own knowledge as to types of cables, safety measures and protective measure which may not be correct for the type of cable encountered. Always consider cables to be “live” and a potential danger to life. Do not re-enter the site until authorized by the electrical company.

Danger of Entrapment!

Do not place hand in moving machine components or devices. Always ensure that all safety guards, covers or other safety devices are correctly in place

“before starting.” Do not remove safety covers or safety devices during operation of the machine.

No loose clothes!

Do not wear loose clothes or long hair. Danger of body injury by loose clothes or hair being caught in the moving parts of the machine.

Suspended loads!

Do not stand under suspended (floating) loads. Danger of body injury by falling loads. Use suitable means of avoiding danger.

Disconnecting Air Hoses!

Only disconnect pressure free hoses. Always turn off the compressor and bleed all air before disconnecting hoses. Before starting any maintenance or inspection work, ensure that the GRUNDOMAT is not connected to any air supply. During repair and maintenance operations always follow the respective safety recommendations. Repair and maintenance operations are restricted to trained and certified staff only.



5

6

Do Not Over-Pressurize!

Do not over pressurize, otherwise explosion or serious damage may occur.

Do not exceed the operating pressure of 7 bar (100 psi). Make sure to only use original T.T. hoses with T.T. couplings that are suitable for this pressure.

Read Operators Manual!

Before starting the machine, fulfill all safety related requirements. All personnel should thoroughly read this operating manual.

Follow all safety instructions concerning safety and possible danger. Do not modify or remove the safety devices or warning labels of this machine. Keep all labels regarding safety and possible danger on the machine in good, readable condition. Special care is required before and during the safety check.

Every crew member should fully understand the safety measures required for the operation and should be capable of following these regulations individually.

Safety Equipment!

The operating crew should always wear the appropriate safety equipment, i.e., ear protection, safety shoes/boots, hard hat, safety glasses, gloves etc.

Operation by Qualified Personnel Only!

Operation of the GRUNDOMAT should be carried out by suitably trained, qualified, and certified personnel only. New operators or operators in training should be working under the constant supervision of a qualified person.

Personnel operating the GRUNDOMAT should have sufficiently studied the operating manual.

Skin Burning Warning!

This item can be hot or cold. Do not touch as burns may result.

Air Hose and GRUNDOMAT Tool Maintenance!

Never use self-swaged hoses. Swaging, re-fitting or replacement of air hoses should always be done in a specialist workshop only. Make sure that the hose couplings are properly tightened before starting the compressor. Check all hoses, pipe lines, fittings, joints and securing bolts daily for correct position and function before starting the bore. Use the machine only if it is in perfect working order and after studying the operating manual, particularly the safetyrelated sections. Always check the machine and its accessories for unwanted movements.

To guarantee long life, regular maintenance is essential. Inadequate or infrequent repair and maintenance operations may lead to accidents, downtime and costly repairs of the machine.

Transporting the GRUNDOMAT Tool!

Danger of accidents. The downward movement of the piston may lead to the

GRUNDOMAT slipping through the textile sling or (in case of smaller machines) through the operator’s hand. Never lift or carry the machine using the air hose (whip hose)–damage to the hose may result. Handling and transporting the machine should be done on a flat, level surface only. Do not overload the transportation vehicle.



Unitherm Setup!

Adjust the UNITHERM so that the compressed air does not exceed a temperature of 100°C. Make sure to follow the safety aspects mentioned in the UNITHERM operating manual. Improper use may cause an explosion.

Never connect the UNITHERM and the combined control unit/lubricator in line.

Using a Starting Cradle & Entrance & Exit Pit Excavation!

It is recommended that the GRUNDOMAT P be used with the starting cradle for correct alignment. Do not touch the steel cable. Do not re-tension during operation. In case of boring above or below known utilities (electrical, gas, water, telecom or others) make sure that a starting cradle is used to align the machine onto the target point. Secure the starting cradle so that the front is the length of the GRUNDOMAT head assembly away from the front wall. The walls of the starting pit should be made vertical where the machine enters. If the soil in the starting pit is very soft and loose, then the cradle should be supported on wooden boards, fixed timber or other means. Always ensure that no buried services are beneath the starting cradle in the launch pit otherwise you may drive an earth anchor into them & cause serious damage.

Make sure there is a sufficient amount of ground cover.

Make sure that start and exit pits are excavated and shored as necessary to comply with OSHA regulations and guard against collapse.

Operation of the GRUNDOMAT Tool!

Start operation of the GRUNDOMAT on reduced air (pressure) only. Always run the GRUNDOMAT slowly into the ground, continually checking the line and level with the GRUNDOSCOPE. Only when satisfied that all is correct should the GRUNDOMAT have full power from the compressor by fully opening the ball valve. Check the GRUNDOSCOPE for accuracy before each bore.

The control unit/lubricator, should always be within reach of the operator.

In case of danger to people or machine, turn off the air supply from the compressor immediately. Always watch the behavior and reaction of your colleagues. In case of danger, take the necessary steps immediately.

Use recommended oils and lubricants only.

Firmly hold or block the hose end when cleaning the hose with compressed air. Point the hose away from body. Do not point hoses at others.

Respect a minimum safety distance from any over head live lines.

When operating beneath railroad tracks, all standards and requirements should be observed. Machine and equipment should be removed from a job site on the track-free side. Never cross the tracks unless supervised.



7

1.

Introduction to GRUNDOMAT

The GRUNDOMAT boring tool is a cylindrical air-hammer which is driven through the ground by compressed air. Its bores (ranging up to 7

7

⁄

8

-in. or 200-mm.) are used for the laying of pipes and cables under roadways and other surface installations.

The GRUNDOMAT can be used in all displaceable soils (sand, loam, gravel)—even those soils containing fracturable rocks. The GRUNDOMAT, however, cannot be used in solid rock, and is not designed for use against unfracturable rocks. Also, soft soils (as in a swamp) may present problems in accuracy as the tool’s own weight may cause it to deviate.

In normal operation, however, the patented reciprocating stepped cone chisel head and long cylindrical shape ensure maximum boring accuracy. Normally, when a boring tool encounters a rock, the tool is pushed off course. The reciprocating action of the

GRUNDOMAT, however, will break a rock up and allow the tool to pass. In addition, if the tool should encounter an unfracturable rock, the GRUNDOMAT can easily be reversed and retrieved to re-start the bore.

GRUNDOMAT

®

Conventional Tool

FIG 1: THE GRUNDOMAT

2.

Operation of the GRUNDOMAT

Connection to a Compressor

Like any pneumatic tool, GRUNDOMAT requires a compressor with adequate capacity for optimal operation. Please see the technical data (page 33) to determine the quantity of air required for each individual GRUNDOMAT model. Note that the operating pressure must not exceed 100 psi.* Operating the GRUNDOMAT at pressures

higher than 100 psi will invalidate the warranty.

*As a rule of thumb, there is a 5 psi drop in air pressure per 50 ft.

length of hose.

Adjust regulator accordingly.

Before connecting the GRUNDOMAT blow air through the air hoses to remove any dirt or other contamination.

8

FIG. 2: TYPICAL GRUNDOMAT CONNECTION SEQUENCE

MODELS 45-110


FIG. 3: TYPICAL GRUNDOMAT CONNECTION SEQUENCE

MODELS 130-180

Make sure that the couplings are securely interlocked and safety rings are tightened before the machine is started. Wrap the couplings with adhesive or electrical tape to keep dirt from getting into the air line.

GRUNDOMAT requires continuous lubrication during operation. This is provided by the in-line lubricator, which is connected between the regulator and the tool. The lubricator should be checked daily at least to ensure that it contains an adequate supply of oil.

Lubricator Operation and Adjustment

High quality pneumatic lubricant is essential for optimum performance of the

GRUNDOMAT soil displacement hammer. GRUNDO-OIL is the recommended lubricant and in addition, GRUNDO-OIL prevents water vapor from freezing inside the machine.

GRUNDO-OIL is completely safe, biodegradable and has no harmful effect on rubber air hoses.

The lubricator ensures that the necessary lubricant is vaporized and supplied to the GRUNDOMAT. If using the silver ASL lubricator the quantity of oil delivered to the

GRUNDOMAT can be adjusted by turning the metering screw that is located in the oil reservoir under the fill cap. Normal setting for these lubricators is 3 to 4. During operation of the GRUNDOMAT a small mist of GRUNDO-OIL should be seen in the exhaust air coming out of the hammer. The red button on the filler cap should be depressed to relieve reservoir pressure and preventing oil discharge when the bore is completed.

When using the blue pot style lubricator the quantity of oil can be varied by turning the adjustment knob in one of five settings on top of the lubricator. During transport the adjusting knob should be in the zero position.

The following chart list control knob settings and oil consumption quantities for the different GRUNDOMAT models.

NOTE: Due to differences in oil compositions, other types of lubricating oils should not be used for the GRUNDOMAT. Some oils may attack and destroy seals in the tool.


9

FIG. 4: SET UP WITH THE UNITHERM COMPRESSED-AIR HEATER

During operation, the compressed air expands in the GRUNDOMAT causing the machine to cool down. Under certain conditions, especially in cold temperature, the machine may cool down so much that the water in the air may form an ice coating on the GRUNDOMAT. An ice coat will bring the GRUNDOMAT to a standstill, even at full impact power. This is avoided by using a Unitherm compressed air heater to heat the air before it enters the tool.

IMPORTANT: The GRUNDOMAT requires more oil as the air temperature rises.

Increase lubrication by removing filler cap on the lubricator and adjusting the brass control screw.

The working depth should be at least

10 times the

GRUNDOMAT diameter.

Aligning and Starting The GRUNDOMAT

Once the GRUNDOMAT is in the ground, it runs straight; its direction cannot be changed or corrected (similar to a bullet when fired from a rifle). For this reason it is extremely important to align the

GRUNDOMAT exactly on target. This can be accomplished

FIG. 5: THE

STARTING CRADLE

using several methods: bottom trench launching with a lever using GRUNDOSCOPE and surveyor’s stake or using a starting cradle and anchor stakes with the larger GRUNDOMATS.

DANGER: Before starting the bore, the utility one call number must be contacted so that any utility lines can be located and marked in the area. Always bore from the congested utility area to the non-congested area.

NOTE: The minimum depth specification for operation of the GRUNDOMAT is ten times the tool diameter. If the minimum depth is not observed, there is a risk of surface damage from soil displacement (see Fig. 6).

The starting and exit pits should be excavated, with the pits being back sloped or shored to conform with local safety work codes. For small diameter bores, the

GRUNDOMAT is laid in the bottom of the pit and pointed at the exit pit. A level is used to set the level or grade. When a precise bore is needed then a GRUNDOSCOPE is placed on the GRUNDOMAT. With the height setting of the GRUNDOSCOPE noted on the surveyor’s staff, a line of sight is taken and the GRUNDOMAT is positioned to align it to the point of exit. Once the GRUNDOMAT is aligned, it should be run into the ground at reduced power (by opening the ball valve half way or less) until the

GRUNDOMAT is one third of its way into the ground. Stop and check the alignment making corrections at this time. Until the GRUNDOMAT is fully into the bore, its line and grade should be constantly checked and where necessary, corrected. It may be necessary to stop the GRUNDOMAT several times. The accuracy to the bore is entirely dependent on correct starting alignment. After the GRUNDOMAT is half way into the ground and the alignment and grade are correct then the air flow can be increased slowly to full power.

Larger diameter bores may require a starting cradle to assist alignment of critical bores.

A starting cradle is a guide device that provides for exact aligning of grade and direction.

It can be used with the GRUNDOSCOPE for a complete alignment system.

To use the starting cradle, position it with the roller toward the starting pit wall. Lower the GRUNDOMAT onto the starting cradle so that the front one third of the tool is centered on the cradle. The anchor stakes are next driven into place to fix the cradle to the pit floor. While using the GRUNDOSCOPE the starting cradle can be adjusted both vertically and horizontally with the adjusting screws until the crosshairs in the scope line up with the designated mark on the surveyors staff. Operate and check for alignment as described earlier.

10


FIG. 6: WORKING DEPTH OF GRUNDOMAT &

FIG. 7: ALIGNING THE GRUNDOMAT WITH THE AIMING FRAME.

General Instructions to be followed during Operation

Always keep a close eye on the GRUNDOMAT while it is working. If the GRUNDOMAT is boring faster than 60-ft. per hour decrease the air supply. The GRUNDOMAT may go off course at that rate of speed.

If the GRUNDOMAT does not begin to cycle when the machine is started it may require an alternate starting procedure. One of the following may be used:

• Turn off the air supply and wait for pressure to bleed out of the tool. Then open valve completely to start the tool.

• Switch from forward to reverse under normal air pressure.

• “Kick-start” with a surge of air pressure. This can accomplished by kinking the air hose (as close to the tool as possible), turning on the air and then releasing the hose.

• A quantity of TT TECHNOLOGIES lubricating oil or biodegradable lubricant (about 4 oz.) can be introduced into the tool by pouring it into the air hose. Then reconnect the hose and try again.

If the hose is shaking or rapidly cycling back and forth in the starting pit the

GRUNDOMAT may be swimming in the bore. Reduce the air supply to the

GRUNDOMAT to allow the soil to grip the sides of the casing and allow forward progress to continue. When boring in unstable ground (sand, loose gravel) it is recommended to pull pipe behind the tool.

It is recommended that the air hose be marked at regular intervals as an aid to determine the distance that the GRUNDOMAT has covered. Remember to add the lengths of the tool and connection hose itself to these calculations.

As the GRUNDOMAT emerges into the exit pit, reduce the air supply.

The Reversing Mechanism

The GRUNDOMAT can be reversed if it encounters an unfracturable obstacle or if it is used for making dead-end holes.

When reversing, the operator should firmly hold the hose and make sure that the tool does not back over it.

IMPORTANT: Do not attempt to reverse the tool when the pipe-pulling tailpiece is attached unless the pipe is also in place. Reverse direction should only be attempted with reverse cone in place or when pipe pulling tailpiece and pipe are in place.

Do not attempt to reverse the tool when the pipepulling tailpiece is attached unless the pipe is also in place.


11

Reversing the tool

Re-setting for forward motion

Factors Affecting Accuracy

Although the GRUNDOMAT is extremely accurate under most conditions, there are several factors which can affect the accuracy of a bore.

Soft soil

If the soil is too soft or watery, the machine will tend to slip slightly due to its weight and/or vibration. Some counter measures include:

• attach a pipe pulling kit and pull pipe

• reduce compressed air supply by 50%

• assist the pipe pulling procedure by using a continuous winch and double locking clamp (see Fig 12)

• push the pipe (steel) using the pipe pushing attachment

In dry conditions the minimum depth should be increased as much as possible to reduce the chance of surface disruption.

Insufficient boring depth

If the boring depth is insufficient, the GRUNDOMAT might tend to deviate upwards.

Counter measure: increase the working depth. Although the minimum working depth is

10 times the GRUNDOMAT diameter, in dry conditions the depth should be increased as much as possible to reduce the risk of surface damage.

Worn displacement cone

A worn displacement cone will cause a loss of accuracy. Inspect the cone before making the bore. If the steps are badly worn, replace the cone (see Fig. 8 & 9).

12

FIG. 8: BADLY WORN

STEPPED CONE

FIG. 9: NEW STEPPED CONE


Attachments

Front-end attachments include: expanders, pulling attachments, smooth cones, oversized multicutter cones and pipe driving and ramming adapters (see Fig. 10).

Some soils, especially clay-like soils, may create excessive friction on the tool casing,

“gripping” the casing and slowing the tool down. To compensate for this condition, an oversized cutter cone is recommended. This attachment will reduce the “grip” of the soil on the casing and should increase speed.

Expanders effectively increase the outside diameter of your GRUNDOMAT, enabling you

(under many circumstances) to make larger diameter bores—without the expense of having to purchase a larger boring tool (see Fig. 10).

In sandy soil conditions a smooth cone may be attached to the GRUNDOMAT for a faster bore. It must be stressed, however, that this may affect the accuracy of the bore.

It is generally best to prioritize accuracy of the bore over speed.

Front End Expander

3.

Pulling Attachment

Pipe Driving Adapter

Smooth Cone with

Roll Pins, Slip on

Oversized Multicutter

Cone

Pipe Driving Tapered

Adapter

FIG. 10: ASSORTED FRONT-END ATTACHMENTS

There are a multitude of other accessories available for use with the GRUNDOMAT boring tool designed to accomplish specific tasks. Contact your GRUNDOMAT dealer for further information. Additionally, TT TECHNOLOGIES is staffed with an experienced engineering department and machine shop and is available to help you with any problems you may have pertaining to specific job applications. One-time products have been produced to enable our customers to overcome particular job-site problems.

Laying of cables and pipes

Solo Boring

Knowing that the soil will not collapse into the bore, the two-step “solo-bore” procedure can be used; installing the pipe or cable after the bore is made. When the tool has completely cleared the borehole, disconnect the air hose and attach an air hose pulling eye (see illustration at right). Attach a rope or cable that can be pulled in as the air hose is removed. Use a cable grip or PE pipe pulling nipple to attach the final product to the rope/cable. Pull in final product. This method of boring is frequently used for the small GRUNDOMAT models or for short distance runs.

4.

13


Pipe Pulling

For operation with the larger GRUNDOMAT models, for covering longer distances, and for soils which tend to collapse after the bore, it is best to pull the pipe directly behind the tool while boring.

Pipe pulling is accomplished with a pipe pulling tailpiece, which fits onto the rear of the

GRUNDOMAT, replacing the rear cone assembly. Pipe pulling tailpieces come in a diverse range of diameters for many sizes of pipe. Pipe pulling also requires the use of a pulling clamp, and may require other accessories as well, like a PE pipe cutting nipple, depending on the size and type of pipe being pulled.

Begin by inserting the air hose and pulling cable inside one or more sections of the pipe.

(Taping the hose and pulling cable together makes this process much easier.) Although it is not necessary to attach all the pipe sections at first, it will avoid having to stop and add them during the bore.

Connect the hose and pulling cable to the tool and push the pipe into the tailpiece.

Then connect the pipe pulling clamp to the rear of the pipe, snug the clamp firmly against the pipe and clamping the cable. For most situations, a plain pipe pulling clamp will provide the necessary pulling force (see Fig. 11).

When using non-PVC pipe with GRUNDOMAT tools 5-in. or larger, (or if the soil is highly unstable), additional rear pressure must be applied to the pipe to assist the tool.

In this case a double locking pipe pulling clamp is used instead of the ordinary clamp.

This is used in combination with a pulling winch and steel cable (see Fig. 12).

FIG. 11: PLASTIC PIPE PULLING CLAMP

FIG. 12: CONTINUOUS WINCH WITH DOUBLE LOCKING CLAMP

The procedure for pulling pipe using the pulley clamp is the same as with the plain clamp except for these additional steps:

• Attach the pulling winch to the starting cradle, and thread the steel cable around the double locking clamp. Then fasten the spring set to the other side of the starting cradle and attach the cable to the springs. During the bore, apply continuous pressure to the pipe with the winch.

• Make sure that the connections at the pipe pulling clamp are always firm so that the pulling cable cannot slip.

• The shock absorber is another accessory that is used for pulling in fitted steel pipe

5-in. to 7-in. in diameter.

14


Sleeve Connections

Pipes with internally and externally smooth surfaces are highly recommended. The maximum outside diameter of the pipe to be laid (i.e. pipe diameter with the coupling) should be about 10-15% smaller than the boring diameter (see Fig. 13).

;;

;;

;;

;

;;

;;

;

;;;

;;;

;

;

;

;;

;;;

;;

;;;

;;

FIG. 13: SLEEVE CONNECTIONS

Steel-Pipe Pushing

When fitted with a special pipe-driving adapter, the GRUNDOMAT (models 375 and larger) is capable of pushing pipe instead of pulling it behind the tool (see illustration below). Contact your GRUNDOMAT dealer for more information on this application.

Pipe Replacement

In a single operation, old pipe can be pushed out while pulling new pipe in (see Fig. 14).

FIG. 14: OLD STEEL PIPE OUT, NEW PIPE IN

Special Applications

Vertical Boring

The GRUNDOMAT along with a vertical bore stand, can make vertical bores up to 33 feet deep.


5.

15

6.

Preventative Maintenance

The tool should be flushed with air tool oil after each usage, and again before any period of extended storage. This helps prevent premature failure of the teflon seals.

After approximately 400 work hours you should inspect and replace seals as needed, check to make sure that the stepped-cone is attached securely, and check the strength of the head spring. Remove the control stud assembly for cleaning and for checking the reverse control, piston, and seals. Also check the control unit/lubricator for wear.

A

16

7.

Note: Follow manufacturer's recommendations when using sealants.

Threadlocking & Bonding

The recommended procedures for obtaining optimum threadlocking and bonding are as follows:

Stepped Head Assembly & Control Stud Housing (Section A & B)

• The parts to be bonded should be carefully cleaned. Debris can be removed with a wire brush. It should then be washed in a cleaner/degreasing solvent and left to dry.

• The threads of the nut (internal thread) is sprayed with the recommended primer and left for approximately one minute to dry. (Internal and External threads are sprayed with primer).

• Correct Loctite product is applied in a zig-zag form across the threads*.

• The activated component is then screwed slowly onto the other component, occasionally backing off with a backwards and forwards motion movement to ensure even distribution of the adhesive across thread faces. The space between the thread flanks must be entirely filled. There should be no air gaps left between the threads.

Reverse Cone, or Pipe Pulling Tailpiece (Section C)

• Teflon pipe tape or PST 567 is applied on the last 10 threads of the reverse cone, pipe pulling tailpiece.

* Reference chart at right.


General Maintenance Procedures

There are four main sections of the GRUNDOMAT maintenance manual:

1.

General maintenance procedures & equipment

2.

Head assembly

3.

Control Assembly

4.

Piston

B C

MAINTENANCE

Thread Sealant Usage Chart For GRUNDOMAT*

*Loctite, Threadlocker, Speedbonder and PST are registered trademarks of

Loctite Corporation

Teflon is a registered trademark of E.I. Dupont de Nemours Co., Inc.

** Reference drawing above


17

1.

MAINTENANCE

Procedures & Equipment

The GRUNDOMAT uses a combination of teflon seals, rubber o-rings and teflon slide tapes for the effective sealing and channeling of air pressure during operation. The teflon seals and slide tapes also serve as wear points for many of the moving parts of the tool, greatly enhancing tool life. In order to maintain full pneumatic power and reduce potential wear on the tool, the seals and slide tapes should be inspected and replaced as needed approximately every 400 operating hours.

Spanner Wrenches

GRUNDOMAT operates at very high impact levels, requiring a high level of torque on all the thread closures to keep them from loosening during operation. This high thread torque is accomplished with special spanner wrenches (see Fig. 15), used in combination with a large hammer. A set of these special wrenches is available for each size of GRUNDOMAT. The spanner wrenches fit into indentations on the tool body.

Clean the spanner hole in the casing to avoid deformation of the casing! The shank screw of the spanner should not touch the casing at the bottom of the spanner hole.

FIG. 15: SPANNER WRENCHES

18


The spanner wrenches are used in combination with a large hammer to apply a high degree of torque to the threads on the head assembly, control assembly, and reverse cone (or pipe-pulling tailpiece). They are used for both the assembly and disassembly of the GRUNDOMAT (see Fig. 16).

FIG. 16: SPANNER FITTINGS & HAMMER ON SPANNER

Loctite Thread Sealing

The head cone assembly of the tool is sealed with a liquid bonding agent. When trying to break this seal, it may be necessary to heat the outside of the casing to liquefy the loctite. Use a blowtorch or other heat source set at a low flame setting and heat the tool casing evenly to 400°F.

(see Fig. 17) Because of the risk of damage to the elastic block, no heat

should be applied to the reverse cone or pipe pulling tailpiece.

Securing the GRUNDOMAT

FIG. 17: LIQUEFYING LOCTITE

Since it will be necessary to apply a great deal of torque to loosen and remove the front and rear assemblies the GRUNDOMAT should be immobilized as effectively as possible.

A special repair stand for the GRUNDOMAT is available from TT TECHNOLOGIES (see

Fig. 18). The best practice for stabilizing the machine to apply sufficient torque is the use of spanner wrenches in combination with a large hammer (see Fig. 19).

Heat can be easily monitored with the use of a temperature sensitive crayon.

FIG. 18: TT TECHNOLOGIES

REPAIR STAND

FIG. 19: SPANNER COMBINATIONS


19

20

2.

MAINTENANCE

Head Assembly

Removal of the stepped-cone

1. Secure the tool the repair stand.

2. Remove the roll pins with a roll pin punch and a hammer (see Fig. 20).

3. Pull off the stepped-cone.

If the stepped cone does not come off the chisel after removing the roll pins, follow these steps.

4. Run the GRUNDOMAT tool in forward a couple of impact strokes.

5. Position the removal ring on the V-groove between the stepped cone and casing tip.

Firmly screw the 3 lock screws into the

V-groove (see Fig. 21).

FIG. 20: REMOVING THE ROLL PINS

6. Position an impact arbor on the chisel head and give it several heavy blows

(see Fig. 22).

7. Retighten the removal ring screws after each series of blows.

8. If the cone still does not come off, it should be quickly heated to approximately 400 degrees F and the arbor given heavy blows once again.

When using a stepped-cone removal ring, do not stand in front of the tool. It is possible that the stepped cone could abruptly fly off and cause injury.

FIG. 21: REMOVAL RING FIG. 22: IMPACT ARBOR

CAUTION: When using a stepped-cone removal ring, do not stand in front of the tool. It is possible that the stepped cone could abruptly fly off and cause injury.

Stepped cone removal rings and impact arbors are available for every size

GRUNDOMAT.

Removing the casing tip

After removing the stepped-cone:

1. Attach a spanner wrench to the casing to block the GRUNDOMAT tool from moving.

2. Quickly heat the casing to 400° F to liquefy the Loctite.

3. Loosen the casing tip with another spanner wrench and unscrew the casing tip out of the casing by hand (see Fig 23).

FIG. 23: UNSCREWING THE

FRONT CASING AND CHISEL


Assembly of head assembly

1. Remove the chisel, inspect seals for wear. If worn, cut seals and o-ring to remove.

2. Clean the external threads on the casing tip and the internal threads on the casing with a wire brush.

FIG. 24: INSTALL O-RING

FIG. 25: SLIDE CHISEL SEAL

ONTO CHISEL

3. Clean all the threads with a solvent degreaser.

4. Install the o-ring into the groove near the back of the chisel (see Fig. 24).

5. Slide the chisel seal onto the chisel and cover the o-ring (see Fig. 25).

6. Grease the chisel where the spring will be located.

7. Push the spring onto the chisel. Make certain that the chamfered end of the spring is placed against the base of the chisel (see Fig. 26).

8. Insert the chisel into the casing tip (see Fig. 27).

FIG. 26: PUSH SPRING ONTO CHISEL FIG. 27: INSERT THE CHISEL

9. Install the o-ring(s) into the groove near the front of the casing tip (see Fig. 28).

NOTE: The number of O-Rings under the cone seal depends on the GRUNDOMAT size:

Tool Size O-Rings

45 ............................0

55 ............................1

65 ............................1

75 ............................1

85 ............................1

95 ............................2

Tool Size O-Rings

100 ............................2

110 ............................1

130 ............................3

145 ............................1

160 ............................1

180 ............................1


21

FIG. 28: INSERT O-RINGS FIG. 29: INSTALL CONE SEAL

10. Install the split cone seal on top of the o-ring(s) and press into the groove (see Fig. 29).

11. Apply grease to the cone seal (see Fig. 30).

12. Screw the casing tip into the casing. Screw on until it bottoms out, but do not lock it in place.

13. Push the stepped-cone onto the chisel. Make sure that the holes in the steppedcone line up with the roll pin grooves on the chisel. A piece of pipe and hammer may be needed to drive the stepped-cone on properly (see Fig. 31).

FIG. 30: GREASE THE SEAL FIG. 31: USING PIPE TO SECURE

STEPPED CONE

Never re-use old roll pins; replace them with new ones.

14. Drive in the larger roll pins first with the split side towards the outside, short ones in front, longer ones in rear (see Fig. 32).

15. Drive in the smaller roll pins, placed inside the larger ones, with the split side towards the inside, short ones in front, longer ones in rear (see Fig. 33).

NOTE: Never re-use old roll pins; replace them with new ones!

16. Unscrew casing tip assembly.

17. For all tools apply activator N or T spray onto the threads and let dry for 1 minute.

18. Apply Loctite in a zig-zag fashion over the length of the threads on the casing tip

(see Fig. 34).

19. Apply Loctite in a zig-zag fashion onto the first half of the internal threads of the casing.

20. Re-install the tip assembly and complete tightening with several heavy blows

(see Fig. 35).

NOTE: When reassembling the GRUNDOMAT, be sure that the serial number on the casing is always positioned at the rear of the tool.

22


FIG. 32: DRIVE IN THE OUTER

ROLL PINS

FIG. 33: DRIVE IN THE INNER

ROLL PINS

FIG. 34: APPLY LOCTITE TO

THREADS

FIG. 35: TIGHTEN HEAD ASSEMBLY

WITH BLOWS


23

3.

MAINTENANCE

Whip Hose & Control Assembly

Servicing the Whip Hose for 45-110 model tools

1. With tool fully assembled, put control stud into reverse position (see Fig. 36).

2. Using two wrenches remove the whip hose from the control stud (see Fig. 37).

FIG. 36: PULL CONTROL STUD

INTO REVERSE

3. Apply loctite 567 to the threads on the new whip hose and assemble

(see Fig. 38).

FIG. 37: REMOVE WHIP HOSE

FIG. 38: APPLY LOCTITE 567 TO

THREADS ON WHIP HOSE

Control Stud Disassembly for 45-110 model tools

1. Attach a spanner to the reverse cone, loosen with a large hammer (see Fig. 39) and take it off.

2. Pull out the control stud (see Fig. 40).

NOTE: If the control stud does not pull out easily, spray inside control stud casing with penetrating oil.

24

FIG. 39: LOOSEN REVERSE CONE FIG. 40: REMOVE CONTROL STUD


3. Remove exhaust ring and inspect for damage or wear (see Fig. 41).

4. Clean and inspect control stud for damage or wear. If further disassembly is required, proceed as follows, otherwise follow control stud re-assembly directions on the next page.

5. Remove exhaust ring safety segment (see Fig. 42).

FIG. 41: REMOVE EXHAUST RING FIG. 42: REMOVE EXHAUST RING

SAFETY SEGMENT

6. Apply heat to liquefy loctite holding the control stud adapter and remove (see

Fig. 43).

7. Remove lockpiece bushing and spring: Release spring torque by compressing spring toward front of control stud until spring tab is exposed. Allow spring to unwind (one half to three quarters of a turn) (see Fig. 44). Twist the lockpiece bushing one quarter turn counter-clockwise to slide it off the control tube.

8. Remove spring.

9. Clean all parts and inspect for damage or wear. Replace if needed.

FIG. 43: REMOVE CONTROL STUD

ADAPTER

FIG. 44: REMOVE LOCK

BUSHING AND SPRING


25

Control Stud Re-Assembly for 45-110 model tools

1. Cut the control seal off (see Fig. 45).

2. Replace seal, stretching the new seal to fit onto the stud (see Fig. 46), then re-form it with a special compression clamp (see Fig. 47).

FIG. 45: REMOVE CONTROL SEAL FIG. 46: STRETCH NEW SEAL TO

FIT CONTROL STUD

FIG. 47: REFORM WITH

COMPRESSION CLAMP

FIG. 48: INSTALL SPRING

3. Install the spring onto the control stud, fitting the spring end into the hole inside the control liner (see Fig. 48).

4. Install the lock bushing, pushing it onto the control stud (see Fig. 49).

5. Pull back the spring and give it a counter-clockwise turn (from the front), at least half a turn, and then snap it into the nearest hole inside the lock bushing. This provides the torque for the operation of the control stud (see Fig. 50).

26

FIG. 49: INSTALL LOCK BUSHING FIG. 50: TENSION SPRING


6. Test the operation of the lock bushing, making sure that the spring is sufficiently tensioned to snap the bushing back into position when released.

7. Fit exhaust ring onto control stud and install safety segment.

8. Apply Loctite 271 or 277 to the control stud adapter and tighten until it fits all the way onto the control stud (see Fig. 51).

9. Insert control stud into control stud housing, lining up the two indentations inside the control stud housing with the protrusions on the exhaust ring (see Fig. 52).

FIG. 51: APPLY LOCTITE AND

TIGHTEN CONTROL STUD

ADAPTER

FIG. 52: INSERT CONTROL STUD

Servicing the Whip Hose for 130-180 model tools

1. Remove reverse cone or pipe pulling tail piece if needed, if the internal allen head screws cannot be reached.

2. Unscrew the 3 socket head cap screws of the hose connection using an allen wrench

(see Fig. 53).

3. Use 2 socket head cap screws as jack screws to remove the whip hose (see Fig. 54).

FIG. 53: REMOVE 3 SOCKET HEAD

CAP SCREWS

FIG. 54: 2 SCREWS USED AS

JACK SCREWS

4. Remove the whip hose.

5. Unscrew the socket head cap screws from the threads.

6. Place o-ring in the groove of the hose connection, and whip hose if needed.

7. Place o-ring in the external groove of the hose connection.


27

8. Press the hose connection into the control tube in a way that the bores align with the threaded bores of the control tube.

9. Screw in the 3 socket head cap screws with lock washers and evenly tighten them using the allen wrench (see Fig. 55).

10. Reinstall the reverse cone or the pipe pulling tail piece if it had previously been removed.

FIG. 55: TIGHTEN 3 SOCKET HEAD

CAP SCREWS

Control Stud Disassembly for 130-180 model tools

1. Attach a spanner to the reverse cone, loosen with a large hammer and take it off.

2. Pull out the control stud.

3. Clamp the control stud into soft jaws of the vice with the whip hose pointing upwards, ready to be removed (see Fig. 56 and refer to appendix 2 for descriptions of parts).

IMPORTANT: Use a soft jaws adapter on the vice when clamping the control stud.

FIG. 56: CONTROL STUD COMPONENTS

4. Remove the whip hose by unscrewing the 3 socket head cap screws of the hose connection (see Fig. 57).

5. Use 2 socket head cap screws as jack screws to remove the whip hose (see Fig. 58).

28

FIG. 57: REMOVE 3 SOCKET HEAD

CAP SCREWS

FIG. 58: 2 SCREWS USED AS

JACK SCREWS


6. Pry open the elastic block and take it off the control stud (see Fig. 59).

7. Clamp the control stud into soft jaws of the vice with the control sleeve facing downwards.

8. Place the control tube end into the disassembly tool (see Fig. 60) until the bore of the tool overlaps the bores of the control tube.

FIG. 59: REMOVE ELASTIC BLOCK FIG. 60: DISASSEMBLY TOOL

9. Screw bolt into the bore. Secure the bolt with a nut to hold in place.

10. Place disassembly tool over the control tube end so that the disassembly tool sits on the support ring of the elastic block (see Fig. 61).

11. Tighten the screw of the control tube end so that the elastic block is compressed and both halves of the segmented rings can be taken out (see Fig. 62).

FIG. 61: DISASSEMBLY TOOL

IN PLACE ON CONTROL TUBE

FIG. 62: REMOVE SEGMENTED

RINGS

12. Take the segmented rings out of the groove of the control tube using a tool such as a screw driver.

13. Loosen the nut until the system has no tension.

14. Remove the bolt.

15. Loosen the nut and release the disassembly tool.

16. Take stop ring (number 16), and sealing ring (number 17) with the control tube off the control tube (see Fig. 56).

17. Remove all seals and o-rings, with an o-ring pick or some other tool.

18. Clean all components with solvent.


29

Control Stud Re-Assembly for 130-180 model tools

30

FIG. 63: CONTROL STUD COMPONENTS

1. Place the control sleeve seal into the groove of the control sleeve (see Fig. 63 and refer to appendix 2 for descriptions of parts).

2. Place the o-ring into the inner groove of the control sleeve and press it into place using a screw driver.

3. Place the control sleeve seal, with its special tool into the inner groove of the control sleeve in the shape of a kidney

(see Fig. 64).

4. Place o-ring in the groove of the stop ring.

5. Place the o-ring of the seal kit into the external groove of the stop ring.

FIG. 64: INSTALLING CONTROL

SLEEVE SEAL

6. Carefully expand the cylindrical sealing ring of the seal kit.

7. Slip the sealing ring of the seal kit over the groove of the stop ring.

8. Use a hose compression clamp to compress the seal kit back into the original size.

Remove the hose compression clamp.

9. Apply a thin layer of grease or lubricating oil over the sliding parts.

10. Place the control tube in the soft jaws of the vice on the work bench.

11. Slip the control sleeve over the control tube.

12. Place the stop ring with the lateral groove facing the control tube and into the control sleeve.

13. Slip the elastic block over the control tube.

14. Slip the support ring over the control tube.

15. Place the control tube end into the disassembly tool (see Fig. 65) until the bore of the tool overlaps the bores of the control tube.

FIG. 65: DISASSEMBLY TOOL


16. Screw bolt into the bore. Secure the bolt with a nut to hold in place (see Fig. 66).

17. Turn the head of the screw so that it is at the edge of the disassembly tool.

18. Place disassembly tool over the control tube end so that the disassembly tool sits on the support ring of the elastic block.

19. Tighten the screw of the control tube end so that the elastic block is compressed and both halves of the segmented rings can be installed (see Fig. 67).

FIG. 66: SECURING BOLT FIG. 67: INSTALLING

SEGMENTED RINGS

20. Use a screw driver to place the segmented rings into the groove of the control tube

(see Fig. 68).

21. Unscrew the nut to release tension and then remove disassembly tool from the control tube end.

22. Release the screw and remove the control tube end out of the control tube.

23. Open the elastic block and place onto the control tube (see Fig. 69).

FIG. 68: SEGMENTED RINGS

IN PLACE

FIG. 69: PLACING ELASTIC BLOCK

ON CONTROL TUBE


31

4.

MAINTENANCE

Piston

Piston Removal for All Tools

1. Secure the GRUNDOMAT in the GRUNDOCLAMP on the special repair stand.

2. Remove the add-on accessory (such as end cone), using spanner wrenches.

3. Pull the control stud out of the casing using the whip hose.

4. Use spanner wrenches and a hammer to loosen the rear screwing (see Fig. 70) (may need to heat to 400° F to liquefy loctite).

5. Place piston extractor hook in the bore of the piston, and extract the piston out of the casing (see Fig. 71).

FIG. 70: REMOVE REAR SCREWING FIG. 71: REMOVE PISTON

Note: Lubricate the piston slides and seal with air tool oil during assembly.

Piston Assembly for All Tools

1. Position the front slide tape in the groove on the piston and begin to insert the piston

(see Fig. 72).

2. Slide the piston in and position the rear slide tape (see Fig. 73).

32

FIG. 72: INSERT PISTON FIG. 73: POSITION REAR

SLIDE TAPE

3. Make sure there is a gap of

1

⁄

16 inch in the slide tapes (see Fig. 74).

4. Slide the piston in until only the small groove at the very rear of the piston remains in sight.


FIG. 74: SLIDE TAPE GAP FIG. 75: INSERT THE PISTON SEAL

5. Install the piston seal into the groove. This seal is split (see Fig. 75).

6. Push the piston in all the way.

7. Make sure that the piston moves smoothly in the casing by pushing and pulling it several times with the piston hook.

8. Install control stud housing into casing using specified loctite product on the threads and tightening with a spanner wrench and hammer.

9. Insert control stud into housing, then install and tighten reverse cone or pipe pulling tailpiece using loctite 277 on the threads and tightening with a spanner wrench and hammer.

Function Test / Technical Information

After the assembly has been completed, the most important functions of the

GRUNDOMAT should be tested:

Check the piston

• Lift the machine at its front and rear in order to find out whether the piston is able to reciprocate forward and backward.

Check functioning

• Attach an air hose and run the GRUNDOMAT briefly at low air pressure. Try the reverse function and then return to the forward function.

Break-In

• New seals require a short break-in period. Lay the tool on the ground and run at low pressure (30-40 psi) for about two minutes.

GRUNDOMAT Technical Information

5.

MAINTENANCE


33

1.

APPENDIX

GRUNDOMAT Model P

(with push control stud, models 45-75)

*Included in Complete Seal Kit above.

34



(with push control stud, models 85-100)

2.

APPENDIX



35

3.

APPENDIX


(with push control stud, model 110-130)

36




(with air operated control stud, models 130-180)

4.

APPENDIX



37

5.

APPENDIX

Control Unit/Lubricator

(with air operated control stud)

38


GRUNDOMAT Service Tools & Accessories

Spanner Wrenches

Part Number

70332-15

70332-20

70332-25

70332-30

70332-37

70332-40

70332-50

70332-57

70332-70

Tool Model

45

55

65

75

85, 95

100, 110

130

145

180

Control Stud Assembly Tool

Part Number

YY 060 931

YY 150 958

Tool Model

130, 145, & 160

180

Chisel Protection Sleeve

Part Number

GE 045 3640

GS 055 3640

GRU 065 3640

GRU 075 3640

GZ 085 3640

GRU 095 3640

GE 110 3640

GRU 130 3640

GE 145 3640

Tool Model

45

55

65

75

85

95

110

130

145

Replacement

Roll-Pin Punches

Part

Number

220410050

220410007

220410060

220410090

220410080

220410110

220410111

GRU 200 7007

Size Tool

(mm) Model

9

7

45

55

11

13

15

17

19

23

65

75

85, 95, 100

110

130

145

Stepped Cone

Removal Ring

Part Number

GE 055 3450

GE 095 3450

GE 145 3450

Tool Model

45-55

65-95

110-145

Seal Compression Clamps

Part Number

1625002

1625003

1625013

1625006

1625007

1625009

Air Hoses

Tool Model

45, 55

65

75, 85

95, 100

110

130

Part

Number

70201-17

70201-35

Description

1

⁄

2

" x 50'

3

⁄

4

" x 50'

GV 130 2257 1" x 65'

GV 180 2257 1

3

⁄

8

" x 65'

Tool

Model

45-55

65-110

130

145-180

Lubricators

Part Number

70229-17

70229-35 or GRU 200 2298

GV 130 2300

GV 180 2300

Tool Model

45-55

65-110

130

145-180

Air Tool Oil Videos

Part Number Description

70231-15

Part Number

GRUNDO-OIL De-icing/ 70767-01

Biodegradable, 1 gallon 70767-02

Description

Operations Video

6.

APPENDIX


39

Trouble Shooting

Trouble Shooting Guide

Observation Reason Solution

1. The general bore speed of the

GRUNDOMAT decreases during the bore.

a) The compressor no longer produces the required pressure.

a) The optimum air pressure is 90 psi. This may be increased to counter the pressure drop if several long air hoses are used on a long bore.

b) If necessary, replace the seals.

b) Air leakage caused by defective or missing seals on the hose couplings.

c) The lubrication of the

GRUNDOMAT is insufficient d) Freezing! Due to rapid expansion of the already compressed air, below 40° F ambient air temperatures, the compressed air cools down to a point where the soil around the

GRUNDOMAT freezes and forms a solid layer of ice on the outside of the machine casing.

This combined effect of the ground and machine freezing stops further soil displacement and the GRUNDOMAT stops.

e) When directly pulling pipes, shrinking or contracting soils may lead to increased friction on the pipe. This happens when the pipe is already too tight in the bore or the bore hole diameter isn't large enough for the pipe.

c) Check the oil level (on the indicator of the control unit).

Check to make sure the right type of oil is being used. In winter, use oils (GRUNDO-OIL) with anti-freeze properties.

d) Use a compressed air heater

UNITHERM / MAXITHERM which pre-warms the compressed air before entering the GRUNDOMAT.

e) Use smaller diameter, smooth pipes or a larger GRUNDOMAT.

The outer diameter of the pipe being installed should be at least

10% smaller in diameter than the

GRUNDOMAT tool. Apply

Bentonite or Polymer to pipe outside diameter to reduce surface friction.

2. GRUNDOMAT begins normally, about half way into the ground, the bore speed is slowly reduced until the machine comes to a standstill.

a) The friction increases as the soil is sticky and shrinking. The machine is being held tight and forward speed is reduced.

a) Back the GRUNDOMAT out and fit an oversized multi-cutter cone on the front of the tool.

3. The general impact energy of

40 the GRUNDOMAT decreases.

a) The control stud and piston seals are damaged or missing.

b) The multi-cutter cone does not move forward or backward.

a) Replace the seals.

b) Disassemble the multi-cutter cone, clean it and assemble with new seals; if the spring is worn or broken, replace it.





4. The general impact energy of the

GRUNDOMAT decreases.

c) The lubrication of GRUNDOMAT is insufficient.

d) The control stud and piston are sticking (not moving freely).

c) Check the oil level on the control unit. If necessary increase the oil volume on the control unit.

d) Pour some GRUNDO-OIL into the air hose and flush tool.

e) Incorrect oil/lubricant has been used (such as hydraulic oils or

ATF).

e) The oil has turned into resin on the inner components of the machine; disassemble the machine and clean its components.

5. The GRUNDOMAT does not arrive direct on target in the exit pit.

a) When looking through the bore, it is straight; therefore the initial alignment was not correct.

b) The GRUNDOMAT has started to "swim" in soft soil.

c) The bore speed was in excess of 65 feet per hour causing it to deviate from its path.

a) Take better care during the alignment of the machine. Make use of the starting cradle and

GRUNDOSCOPE aiming frame and check them.

b) Reduce the air supply via the ball valve on the control unit.

Statically push the pipes using a winch as the soil friction is insufficient and the machine starts to "swim".

c) Reduce the air supply, slightly close the ball valve on the control unit.

d) The GRUNDOMAT was not fitted with the right displacement head.

e) The multi-cutter cone is badly worn.

d) In rocky soil, use the stepped multi-cutter cone; in sandy soils, use the threaded or slip on smooth cone.

e) Replace the multicutter cone with a new one.


41




6. Reversing from forward to backward motion is a problem.

a) The control mechanism is dirty or defective.

a) Check if parts on the control stud have worn and clean or replace them if necessary.

7. When switching the

GRUNDOMAT 145 P tool from forward to reverse the machine makes another 5 to 6 strokes, then comes to a standstill.

a) The GRUNDOMAT tool does not have sufficient friction in reverse, the machine "swims".

a) When switching the machine into reverse, reduce the air supply temporarily using the stop cock on the auto reverse control system.

8. GRUNDOMAT switches into reverse even though the handle on the control unit is in forward position (Models 130-180 P

Tools).

In forward motion the control hose is not pressurized. If the control hose or the seal (described below) are defective, the GRUNDOMAT will automatically run backward.

Also if excessive air escapes from the 3-way ball valve.

a) The o-rings in the control hose couplings are defective or missing.

b) The control hose coupling is defective.

c) The TT coupling on the connection hose, the air hose, the control unit or the bypass are not tightened securely.

d) The control hose is defective.

e) The o-ring in the whip hose is defective or missing (Item 25, pg 34).

f) The seal in the control sleeve is defective (Item 19, pg 34).

g) Seals of the stop ring are defective.

h) The control hose is loose.

a) Change the o-rings.

b) Check the control hose coupling and replace it, if necessary.

c) Thread manually until the very end.

d) Replace the control hose.

e) Replace the o-ring.

f) Replace the seal.

g) Replace the seals.

h) Lay out the hose & reconnect it.

42



43

Additional products and training materials are also available, like our Tools & Accessories

Catalogs and User Manuals, Contact your TT salesman for details.

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Printed in USA • 01.01.07 • REV 3.0

Copyright© 2007, TT Technologies, Inc.

TT Technologies GRUNDOMAT P Boring tool Operators & Parts Manual

Assistant Bot

UNDERGROUND

BORING

TOOL

GRUNDOMAT Model - P

Operators & Parts Manual

Table of Contents

Safety Section

Operations

General Maintenance Procedures

Part Number Listings

Important Safety Instructions

WEAR EAR

PROTECTION

WEAR SAFETY

GLASSES

WEAR SAFETY

SHOES

WEAR SAFETY

GLOVES

WEAR

HARD HAT

DANGER:

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. This signal Word should be used in the most extreme situations.

WARNING:

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION:

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

Introduction to GRUNDOMAT

GRUNDOMAT

Operation of the GRUNDOMAT

Connection to a Compressor

Lubricator Operation and Adjustment

Aligning and Starting The GRUNDOMAT

General Instructions to be followed during Operation

The Reversing Mechanism

Factors Affecting Accuracy

Attachments

Laying of cables and pipes

Solo Boring

Pipe Pulling

Sleeve Connections

Steel-Pipe Pushing

Pipe Replacement

Special Applications

Vertical Boring

Preventative Maintenance

Threadlocking & Bonding

General Maintenance Procedures

Thread Sealant Usage Chart For GRUNDOMAT*

Procedures & Equipment

Spanner Wrenches

Loctite Thread Sealing

Securing the GRUNDOMAT

Head Assembly

Removal of the stepped-cone

Removing the casing tip

Assembly of head assembly

Whip Hose & Control Assembly

Servicing the Whip Hose for 45-110 model tools

Control Stud Disassembly for 45-110 model tools

Control Stud Re-Assembly for 45-110 model tools

Servicing the Whip Hose for 130-180 model tools

Control Stud Disassembly for 130-180 model tools

Control Stud Re-Assembly for 130-180 model tools

Piston

Piston Removal for All Tools

Piston Assembly for All Tools

Function Test / Technical Information

Check the piston

Check functioning

Break-In

GRUNDOMAT Technical Information

GRUNDOMAT Model P

(with push control stud, models 45-75)

GRUNDOMAT Model P

(with push control stud, models 85-100)

GRUNDOMAT Model P

(with push control stud, model 110-130)