Eskridge 75 Series Service Manual

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Service Manual

75 SerieS Digger MoDelS

WiTH auToMaTic KicKDoWn

75 51 6 example Part number

2 f 61 K2 -

Model Ratio Shaft Bail Boss

THiS Service Manual iS effecTive:

S/n: 102358 To currenT

DaTe: 7-2012 To currenT verSion: SM75K2_0413

Motor

Supplier

Motor

Number

Option 1 Option 2 noTe: Individual customer specifications (spindle mounting, sprocket pilot, brake assembly, etc.) may vary from exploded drawing and standard part numbers shown. If applicable, refer to customer drawing for details.

exploded view Drawing

14A

14B

16A

16F

16G

16B

16C

16D

16E

13A

13B

13C

13D

13E

13F

Eskridge

GROUP

12A

12B

12C

12D

11A

11B

11C

10A

10B

ITEM

QTY

EFFECTIVE

FROM: S/N 102358 07-01-2012

TO: CURRENT

X75K2 ab ECN:3451E 07-11-12 HWP

KICKDOWN MODEL 75 SERIES (HYDRASYNC) AUGER DRIVE

DESCRIPTION

BEARING CARRIER

51.43:1

75-004-3012

40.25:1

75-004-3012

RING GEAR- PRI

RING GEAR- SEC

COVER

INPUT GEAR

CARRIER ASSY-PRI

CARRIER - PRI

PLANET GEAR - PRI

PLANET SHAFT - PRI

25-004-1012

25-004-1022

25-004-1222

25-004-1162

25-005-2001

25-004-1032

25-004-1102

25-004-1031

25-004-1012

25-004-1022

25-004-1222

25-004-1162

25-005-2001

25-004-1032

25-004-1102

25-004-1031

THRUST WASHER - PLANETS

BEARING

ROLL PIN

CARRIER ASSY - SEC

CARRIER - SEC

PLANET GEAR - SEC

PLANET SHAFT

PLANET WASHER

BEARING

ROLL PIN

SHAFTS

OUTPUT SHAFT - 2-5/8 HEX

OUTPUT SHAFT - 3" HEX

SUN GEAR - SEC.

THRUST WASHERS

81-004-1561

01-105-0570

01-153-0020

25-005-2031

25-004-1062

25-004-1082

25-004-1021

25-004-1041

01-105-0550

01-105-0560

01-153-0190

75-004-4022

75-004-4012

25-004-1142

81-004-1561

01-105-0570

01-153-0020

25-005-2041

25-004-1072

25-004-1092

25-004-1021

25-004-1041

01-105-0550

01-105-0560

01-153-0190

75-004-4022

75-004-4012

25-004-1152

25-004-1132

81-004-2883

25-004-1132

81-004-2883

CARRIER THRUST WASHER

INPUT THRUST WASHER

SEALS & 0-RINGS

OUTPUT SHAFT SEAL

O-RING

OUTPUT SHAFT BEARINGS

INNER BEARING CONE

INNER BEARING CUP

OUTER BEARING CONE

OUTER BEARING CUP

HARDWARE

HEX HEAD CAP SCREW (1/2-13 X 7.5)

HHCS (5/8-11 X 1-3/4)

FLATWASHER - HDN (1/2 X 7/8 X 1/8)

LOCKWASHER - 5/8 ZINC PLATED

HHCS (1/4-20 X 1.75)

FLAT WASHER (1/4)

PLUGS AND GREASE FITTINGS

PLUG - 1/2 NPT MAGNETIC

HOLLOW HEX PLUG (05HP-12)

BAIL ASSEMBLIES

2" BOSS - BACKHOE M50 MOTORS

1.5" BOSS, M50 MOTORS

2" BOSS M50 MOTORS

MISCELLANEOUS

SHIM

SUPPORT RING (250)

RETAINING RING

BAND CLAMP

BRACKET

VALVE BODY 2-DIRECTION

FITTING-16-16 TO -4 KICKDOWN

MOTORS

MOTOR - C.S. M50 1.5 X 2.5 (HI) (SPL SEAL)

MOTOR - C.S. M51 2.5 X 2.5 (HI) (SPL SEAL)

TUBE KIT

KIT - TUBE ASSY. & FITTING KICDOWN 60

KIT - TUBE ASSY. & FITTING KICDOWN 61

01-405-0500

01-402-0020

01-402-0010

01-102-0250

01-103-0250

01-102-0120

01-103-0110

01-150-1660

01-150-0110

01-166-0120

01-166-0040

01-150-1690

01-166-0390

01-207-0041

01-208-0030

75-005-2222

75-005-2082

75-005-2222

25-004-1051

25-004-1061

01-160-0600

01-365-0020

01-360-0040

01-308-0150

01-316-0020

01-304-0600

01-304-0610

01-309-0600

01-309-0610

01-405-0500

01-402-0020

01-402-0010

01-102-0250

01-103-0250

01-102-0120

01-103-0110

01-150-1660

01-150-0110

01-166-0120

01-166-0040

01-150-1690

01-166-0390

01-207-0041

01-208-0030

75-005-2222

75-005-2082

75-005-2222

25-004-1051

25-004-1061

01-160-0600

01-365-0020

01-360-0040

01-308-0150

01-316-0020

01-304-0600

01-304-0610

01-309-0600

01-309-0610

01-150-1660

01-150-0110

01-166-0120

01-166-0040

01-150-1690

01-166-0390

01-207-0041

01-208-0030

75-005-2222

75-005-2082

75-005-2222

25-004-1051

25-004-1061

01-160-0600

01-365-0020

01-360-0040

01-308-0150

01-316-0020

01-304-0600

01-304-0610

01-309-0600

01-309-0610

01-150-1660

01-150-0110

01-166-0120

01-166-0040

01-150-1690

01-166-0390

01-207-0041

01-208-0030

75-005-2222

75-005-2082

75-005-2222

25-004-1051

25-004-1061

01-160-0600

01-365-0020

01-360-0040

01-308-0150

01-316-0020

01-304-0600

01-304-0610

01-309-0600

01-309-0610

37.80:1

75-004-3012

25-004-1012

25-004-1022

25-004-1222

25-004-1172

25-005-2011

25-004-1042

25-004-1112

25-004-1031

81-004-1561

01-105-0570

01-153-0020

25-005-2031

25-004-1062

25-004-1082

25-004-1021

25-004-1041

01-105-0550

01-105-0560

01-153-0190

75-004-4022

75-004-4012

25-004-1142

01-405-0500

01-402-0020

01-402-0010

01-102-0250

01-103-0250

01-102-0120

01-103-0110

25-004-1132

81-004-2883

29.58:1

75-004-3012

25-004-1012

25-004-1022

25-004-1222

25-004-1172

25-005-2011

25-004-1042

25-004-1112

25-004-1031

81-004-1561

01-105-0570

01-153-0020

25-005-2041

25-004-1072

25-004-1092

25-004-1021

25-004-1041

01-105-0550

01-105-0560

01-153-0190

75-004-4022

75-004-4012

25-004-1152

25-004-1132

81-004-2883

01-405-0500

01-402-0020

01-402-0010

01-102-0250

01-103-0250

01-102-0120

01-103-0110

* NUMBER OF SHIMS DEPENDANT UPON BEARING PRELOAD.

16D

13B

13D

16G

11C

11B

14A

12D

12C

11A

13A

13C

Model 75K2 service manual, SM75K2_0413 Page 2 eskridge, inc. olathe, KS. 913-782-1238 www.eskridgeinc.com

16E

16C

16B

16A

11B

12A

12B

16F

13E

13F

14B

10B

10A

11B

10A

lubricaTion & MainTenance

Using the chart below, determine an appropriate lubricant viscosity. Use only EP (extreme pressure) or API GL-5 designated lubricants.

Change the lubricant after the first 50 hours of operation and at 500 hour intervals thereafter. The auger drive should be partially disassembled to inspect gears and bearings at 1000 hour intervals.

recommended ambient and operating temperatures for conventional and synthetic gear lubricants

-50 -25 0 25 50 75 100 125 150 175 200 225 250 F

80W90 conventional

75W90 conventional

85W140 conventional

Min ambient/operating temp Max ambient temp Max operating temp

75W90 synthetic

80W140 synthetic

-45 -32 -18 -4 10 24 38 52 66 79 93 107 121 C note: ambient temperature is the air temperature measured in the immediate vicinity of the gearbox. a gearbox exposed to the direct rays of the sun or other radiant heat sources will operate at higher temperatures and therefore must be given special consideration. The max operating temp must not be exceeded under any circumstances, regardless of ambient temperature.

If your unit was specified “shaft up” or with a “-Z” option, a grease zerk was provided in the base housing. For shaft-up operation, the output bearing will not run in oil and must be grease lubricated. Use a lithium based or general purpose bearing grease sparingly every

50 operating hours or at regular maintenance intervals. Over-greasing the output bearing should be avoided as it tends to fill the housing with grease and thicken the oil operating Position

Vertical Shaft (Pinion Down)

eSKriDge MoDel 75 oil caPaciTY

Single stage oil capacity

Double stage

10 pts / 4.7 liters

Triple stage oil level

To midway on upper/ primary gear set

Warning: While working on this equipment, use safe lifting procedures, wear adequate clothing and wear hearing, eye and respiratory protection.

eSKriDge ParT nuMber inTerPreTaTion

note: all non custom eskridge geardrives are issued a descriptive part number which includes information regarding the Model, means of shaft retention, base style, shaft style, input mounting, input shaft size, overall ratio and various available options. for a detailed breakdown of this information, please refer to eskridge product specification sheets found at: http://www.eskridgeinc.com/diggers/diggerprodspecs.html

Model 75K2 service manual, SM75K2_0413 Page 3 eskridge, inc. olathe, KS. 913-782-1238 www.eskridgeinc.com

unit Disassembly Procedure

1) Scribe a diagonal line across the outside of the unit from the bail (15) to the base (1) before disassembly to aid in the proper positioning of pieces during reassembly.

2) Remove magnetic drain plug (14a) and drain oil from unit.

The oil will drain out faster and more completely if warm.

3) Disconnect the kickdown tube from the large fitting (16g) on the motor (17) outlet port. Remove the large fitting.

4) Remove the twenty hex-head capscrews (13a) and flat washers (13c) .

5) Separate bail (15) from cover (4) and remove from digger assembly.

6) Inspect kickdown tube kit (18) and valve body (16f) . If nothing is damaged, no replacement or service is necessary. Leave the tube kit and valve body assembled on the motor for the remainder of the unit disassembly and inspection. If there is damage, the tube kit must be replaced as a complete kit.

7) Remove hex-head capscrews (13b) and lockwashers (13D) and remove motor (17) from cover (4) .

8) Remove cover (4) , thrust washers (10b & 10a) , and input gear

(5) . Inspect o-ring (11b) ; discard if damaged or deformed.

9) Lift Stage I planet carrier assembly (6) out of the unit

Remove ring gear (2) and inspect o-ring (11b) ; discard if damaged or deformed.

10) Remove secondary sun gear (9) and thrust washer (10a) .

11) Lift the Stage II planet carrier assembly (7) out of the unit.

12) Remove the Stage II ring gear (3) . Inspect o-ring (11b) ; as before, discard if damaged.

13) The unit is now separated into subassemblies. The area(s) requiring repair should be identified by thorough inspection of the individual components after they have been cleaned and dried.

inspection or replacement is required, proceed as follows.

noTe: Support only the carrier (6a) while pressing out planet shafts.

2) Drive roll pins (6f) completely into the planet shafts (6c) .

3) Press or drive planet shafts (6c) out of carrier (6a) .

4) Remove planet gears (6b) and thrust washers (6D) from the carrier (6a).

5) Inspect the planet gear (6b) bearing bore, planet shaft (6c) and bearings (6e) . Check for spalling, bruising or other damage. Replace components as necessary.

6) Check primary planet shafts (6c) for any abnormal wear, especially ones where bearings needed to be replaced.

If any abnormal wear is found, replace planet shafts.

7) Use 3/16 inch pin punch to remove roll pins (6f) from planet shafts (6c) .

noTe: if either the bearings or the planet shafts (pins) are damaged, both components should be replaced.

reassembly

1) Install bearing (6e) into planet gear (6b) . Place one thrust washer (6D) on each face of the planet gear. Install gear assembly into carrier (6a) .

2) Planet shafts (6c) should be installed with chamfered end of

3/16 inch hole toward outside diameter of the carrier (6a) .

This will aid in alignment of holes while inserting roll pins

(6f) .

3) Drive a roll pin (6f) through the carrier hole and into the planet shaft to retain the parts. Repeat for other planet gears.

Stage i carrier Subassembly

(items 6a, 6b, 6c, 6D, 6e & 6f)

Disassembly

1) Rotate planet gears (6b) to check for abnormal noise or roughness in bearings (6e) or planet shafts (6c) . If further

Stage ii carrier Subassembly

(items 7a, 7b, 7c, 7D, 7e, 7f, & 7g)

Disassembly

1) Rotate planet gears (7b) to check for abnormal noise or roughness in bearings (7e & 7f) . If further inspection or replacement is required, proceed as follows.

2) Drive roll pins (7g) completely into the planet shafts (7c) .

3) Slide planet shafts (7c) out of carrier (7a) .

4) Remove planet gears (7b) , washers (7D) and bearings (7e &

7f) from carrier (7a) .

Model 75K2 service manual, SM75K2_0413 Page 4 eskridge, inc. olathe, KS. 913-782-1238 www.eskridgeinc.com

5) Inspect the planet gear (7b) bearing bore, planet shaft (7c) and bearings (7e & 7f) . Check for spalling, bruising or other damage. Replace components as necessary.

6) Remove roll pins (7g) from primary planet shafts (7c) using a 3/16 inch pin punch.

reassembly

1) Rebuild primary planet carrier assembly in reverse order using any needed new parts.

2) Install bearing (7e & 7f) into planet gear (7b) . Place one thrust washer (7D) on each face of the planet gear. Install gear assembly into carrier (7a) .

3) Planet shafts (7c) should be installed with the chamfered end of the 3/16 inch hole towards the outside diameter of the carrier (7a) ; this will aid in alignment of holes while inserting roll pins (7g) .

4) Drive roll pin (7g) into the carrier hole and into the planet shaft to retain the parts. Repeat for remaining planet gears.

base Subassembly

(items 1, 8, 11a, 12a, 12b, 12c, 12D, 14a, 16a, 16b, 16c)

16C

16B

14A

12D

12C

11A

16A

12A

12B

8 note: removing the shaft from the base assembly damages the shaft seal and the seal will need to be replaced.

3) A gear puller may be used to remove the outer bearing cone

(12c) from the shaft (8) . If reusing old bearing cone, do not pull on or damage roller cage. Remove the shaft seal (11a) from the shaft for replacement.

4) Inspect inner and outer bearing cups (12b & 12D) . If cups are damaged, drive them out using a brass drift and utilizing the bearing knock-out notches in the base (1) reassembly

1) Clean all foreign material from magnetic oil plug (14a) located on the side of the base (1) .

2) Place base (1) (output side up, opposite shown) on the table.

3) Apply a layer of lithium or general purpose bearing grease to the roller contact surface of outer bearing cup (12D) .

4) Press outer bearing cone (12c) (large end down as shown) onto the shaft (8) until it seats against the shoulder. note: Press bearing cone onto output shaft by pressing on inner race only. Do noT press on roller cage, as it may damage bearing.

5) Place the shaft (8) with the bearing (12c) into the base (1) .

6) Flip this assembly, resting the base (1) on the end of the output shaft (8) .

7) Apply a layer of lithium or general purpose bearing grease to the roller contact surface of the inner bearing cup (12b) . Press the inner bearing cone (12a) (large end up as shown) onto the shaft (8) until it is seated against inner bearing cup.

8) Without the shaft seal (11a) installed, the preload may result in a rolling torque that varies between 50 to 300 in-lb. The bearing preload should be tailored to your application; a lowspeed application may require a high pre-load, high-speed applications usually benefit from low pre-load. Adding shims

(16a) will increase the pre-load on the bearing set. Determine your pre-load requirement and install shims to obtain this preload. Place the support ring (16b) over the shims (16a) and install the retaining ring (16c) into the groove in the shaft

(8) .

9) Lubricate inner lip of new shaft seal (11a) and slide it onto the shaft (8) and over the shaft seal diameter then press the seal into the base bore (1) .

Disassembly

1) Remove the retaining ring (16c) , support ring (16b) and shims (16a) .

caution: Since the output shaft is no longer retained, care should be taken to avoid personal injury. care should also be taken not to damage it when it is pressed through base.

2) Base (1) should be set shaft side down, as shown, on a plate or table. Press output shaft (8) through the bottom of base by applying a load to top end (internal end) of shaft until it passes through inner shaft bearing cone (12a) .

Model 75K2 service manual, SM75K2_0413 Page 5 eskridge, inc. olathe, KS. 913-782-1238 www.eskridgeinc.com

Kickdown Subassembly

(items 13e, 13f, 16D, 16e, 16f, 16g, 17, 18)

16E

16D 17

16G

16F

13E

13F

13) Place bail (15) onto assembly and align holes in bail and cover (4) using scribed line made during disassembly as a reference. Install and torque the 20 1/2-13 hex head capscrews

(13a) with flatwashers (13c) . Torque the capscrews to 110 ft-lbs dry, or 80 ft-lbs if fasteners are lubricated.

14) Fill the unit to the proper level, as specified, with GL5 EP

80/90 gear oil.

The digger is now ready to use.

If you experience problems with your kickdown system, please refer to the Kickdown Assembly or Kickdown Adjustment instructions. If neither of these solves your problem, contact Eskridge for service all subassembly service or repairs should be complete at this time. continue to unit assembly to complete unit buildup.

unit assembly

1) When all subassemblies are complete, the unit is ready to be assembled.

2) Install the Stage II carrier assembly (7) onto the output shaft; align the splines of the carrier (7a) with the splines of the shaft (8) and slide the carrier onto the shaft.

3) Lubricate o-ring (11b) and install on the pilot of the

Stage II ring gear (3) . caution: Hold ring gear by outside or use lifting device to prevent injury.

5) Install Stage II sun gear (9) into Stage II carrier assembly (7) .

Place thrust washer (10a) onto Stage II carrier (7a) .

6) Align gear teeth of ring gear (3) with the gear teeth of the planet gears (7b) and place on base. Align mounting holes of ring gear with holes in base using the scribed line made during disassembly for reference.

7) Lubricate o-ring (11b) and install on the pilot of the

Stage I ring gear (2) . Install ring gear and align mounting holes of ring gear with holes in base. Use the scribed line made during disassembly for reference.

8) Slide Stage I carrier (6a) onto Stage II sun gear (9) .

9) Install input gear (5) and thrust washers (10a & 10b) . Lubricate o-ring (11b) and install on the pilot of the gearbox cover

(4) . Noting the scribed line made during disassembly, install cover .

10) Ensure the unit spins freely by using a splined shaft to drive the input gear (5) .

11) Install motor (17) onto cover (4) using hex-head capscrews

(13b) and lockwashers (13D).

Lube fasteners and torque to

110 ft-lb.

12) If the kickdown system was removed, reassemble as detailed in Kickdown Assembly Instructions.

Model 75K2 service manual, SM75K2_0413 Page 6 eskridge, inc. olathe, KS. 913-782-1238 www.eskridgeinc.com

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