Specifications | Central Hydraulics 95553 Automobile Parts User Manual

20 Ton Air Over Hydraulic Jack
Model 95553
Assembly And Operation Instructions
Diagrams within this manual may not be drawn proportionally.
Due to continuing improvements, actual product may differ slightly from the product
described herein.
Distributed exclusively by Harbor Freight Tools®.
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our website at: http://www.harborfreight.com
Read this material before using this
product. Failure to do so can result in
serious injury.
Save this manual.
Copyright© 2007 by Harbor Freight Tools®. All rights
reserved. No portion of this manual or any artwork contained
herein may be reproduced in any shape or form without the
express written consent of Harbor Freight Tools.
For technical questions or replacement parts, please call 1-800-444-3353.
REVISED MANUAL 08b
Specifications
Maximum Height
Minimum Height
Ram Travel
Air Fitting
16-3/4” without screw extension
20” with screw extension
10-1/4” without screw extension
6-½”
¼” NPT with quick release nipple
Operating Pressure
Lifting Capacity
Base Dimensions
Hose Size
Weight
110-120 PSI
20 Tons (40,000 lb.)
8-5/8” L x 5-3/16” W
3/8” x 48” L
35 lb.
Note:
All part numbers mentioned in this manual refer to the Parts Lists and Assembly Diagrams
on pages 8 - 11.
Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions,
operating and maintenance procedures, parts list and diagram. Keep your invoice with this
manual. Write the invoice number on the inside of the front cover. Keep the manual and
invoice in a safe and dry place for future reference.
Safety Warnings and Precautions
WARNING: When using tool, basic safety precautions should always be followed to reduce
the risk of personal injury and damage to equipment.
Read all instructions before using this tool!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use machines or power tools in damp or wet
locations. Don’t expose to rain. Keep work area well lit.
3. Keep children away. Children must never be allowed in the work area. Do not let them
handle machines, tools, or extension cords.
4. Store idle equipment. When not in use, tools must be stored in a dry location to inhibit
rust. Always lock up tools and keep out of reach of children.
5. Use the right tool for the job. Do not attempt to force a small tool or attachment to do
the work of a larger industrial tool. There are certain applications for which this tool was
designed. It will do the job better and more safely at the rate for which it was intended. Do
not modify this tool and do not use this tool for a purpose for which it was not intended.
6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving
parts. Protective, electrically non-conductive clothes and non-skid footwear are recommended when working. Wear restrictive hair covering to contain long hair.
7. Use eye, hand and ear protection. Always wear ANSI approved impact safety goggles
when working. Wear a full face shield if you are producing metal filings or wood chips.
Wear an ANSI approved dust mask or respirator when working around metal, wood, and
chemical dusts and mists. Wear protective gloves when handling tools and equipment.
8. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines.
SKU 95553
For technical questions please call 1-800-444-3353.
Page 2
9. Maintain tools with care. Keep tools maintained and clean for better and safer performance. Follow instructions for lubricating and changing accessories. The handles must
be kept clean, dry, and free from oil and grease at all times.
10. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are
removed from the tool or machine work surface before beginning work.
11. Avoid unintentional operation. Be sure all safety precautions are followed, lift is secure
and vehicle is properly positioned before operating this jack. Always think several steps
ahead of your current operation to ensure safety.
12. Stay alert. Watch what you are doing, use common sense. Do not operate any tool when
you are tired or using any medication.
13. Check for damaged parts. Before using any tool, any part that appears damaged
should be carefully checked to determine that it will operate properly and perform its
intended function. Check for alignment and binding of moving parts; any broken parts
or mounting fixtures, and any other condition that may affect proper operation. Any part
that is damaged should be properly repaired or replaced by a qualified technician. Do
not use the tool if any control does not operate properly.
14. Replacement parts and accessories. When servicing, use only identical replacement
parts. Use of any other parts will void the warranty.
15. WARNING! Fluid ejected at high pressure can cause injection injury. Do not handle
equipment if leaking. Avoid high pressure leak ejection stream.
16. Do not operate tool if under the influence of alcohol or drugs. Read warning labels
on prescriptions to determine if your judgment or reflexes are impaired while taking drugs.
If there is any doubt, do not operate the tool.
17. Maintenance. For your safety, service and maintenance should be performed regularly
by a qualified technician.
18. Use compressed air only. Only use clean, dry and regulated compressed air at no more
than 120 PSI to power this tool. Never use oxygen, carbon dioxide or any other bottled
gas as a power source for this tool.
19. Keep the air hose away from the jack at all times. If an air hose is crushed, it can
rupture resulting in personal injury.
20. Do not exceed the weight limit of this jack, which is 40,000 lb. (20 tons). Overloading
may cause damage to the hydraulic seals. Overloading may also cause the jack to fade
or suddenly fail, allowing the vehicle to suddenly lower.
21. Do not lift an unbalanced load. An unbalanced load may suddenly pitch off the jack
possibly causing serious injury or property damage.
22. Avoid Dynamic Loading. This jack is designed to safely handle a mass of 20 tons. If
an object is dropped on the jack, the force applied to the jack will be greater than the
force applied by the same object at rest, and may exceed the safe operation limits of
this tool.
23. Avoid Pinch Injury. The return spring will compress when the jack is lowered. Be careful to keep hands, tools, clothing and other materials away from the return springs to
avoid pinch injury.
SKU 95553
For technical questions please call 1-800-444-3353.
Page 3
24. Only use high quality hydraulic jack oil; do not substitute any other type of oil.
25. Warning: The warnings, cautions, and instructions discussed in this instruction manual cannot cover all possible conditions and situations that
may occur. It must be understood by the operator that common sense and
caution are factors which cannot be built into this product, but must be
supplied by the operator.
26. WARNING: The brass components of this product contain lead, a chemical
known to the State of California to cause birth defects (or other reproductive
harm). (California Health & Safety code § 25249.5, et seq.)
Unpacking
When unpacking, check for damage. If any parts are missing or broken, please call Harbor
Freight Tools at the number on the cover of this manual.
(1) Air / Hydraulic 20-ton bottle jack
(1) Attached 48” Air Hose with fittings
(1) 2-piece jack handle
Please refer to the Assembly Diagrams and Parts Lists on pages 8 - 11 of this manual for
other parts information.
SKU 95553
For technical questions please call 1-800-444-3353.
REV 08a
Page 4
Assembly
1. Apply thread seal tape (not included) to the threads and screw the Air Valve (44) onto
the Air Hose (43).
Air Pressure Supply
Before initial use, a pressurized air supply must be furnished. The hydraulic fluid
level must also be checked before use.
1. Use proper size and type air pressure line and fittings. The recommended air line for
this tool is 3/8” delivering no more than 120 PSI. Air inlet size is 1/4” - 18 NPT.
2. Maintain a proper regulator and moisture trap in your air line at all times.
3. Compressed air only. Only use clean, dry and regulated compressed air at no more
than 120 PSI to power this tool. Never use oxygen, combustible gases, carbon dioxide
or any other bottled gas as a power source for this tool.
We recommend that you use both a filter and an in-line oiler in your air supply system
as illustrated in the diagram below. These components are not included with this tool, but are
available from Harbor Freight Tools.
Air
Compressor
Jack
Recommended Air Line Components
This item is supplied with a quick connect male fitting on the Air Valve (44). Quick connect
fittings make working with air powered tools easier and more convenient.
Checking Hydraulic Fluid
Note: Before first use, the hydraulic ram may need to be purged. Some air may intrude in the
hydraulic system due to movement during shipping.
Air bubbles can become trapped inside the hydraulic system thereby reducing the efficiency of the Jack. Purge the air from the system if lift efficiency drops.
1. Place the slotted end of the Jack Handle (45) assembly over the Release Valve Release
(4) and turn 1-1/2 turns counterclockwise.
2. Remove the Oil Filler Plug (16) on the side of the jack Reservoir (15) by gently turning
counterclockwise.
3. Rapidly pump the Handle assembly several times to purge the air from the hydraulic
system.
4. Turn the Release Valve screw clockwise until snug using the Handle assembly.
SKU 95553
For technical questions please call 1-800-444-3353.
Page 5
5. Top off jack Reservoir (15) with a high quality hydraulic jack oil, see page 7.
6. Replace the Filler Plug (16).
Operation
This is an air-actuated hydraulic bottle jack. The air motor is air pressure activated and
drives the hydraulic jack. In the event no air pressure is available, a standard hydraulic piston
assembly is provided for hand jacking.
1. Position the Jack on a solid level surface that can withstand the weight of the jack and
the load which will be lifted.
2. Be sure the load is balanced on the jack. Sturdy jack stands (not included) positioned under
the weight provide a good safety precaution against the possibility of the load toppling.
3. Be sure that the jack is positioned at a proper lift point on the item to be lifted. Using
appropriate lift points avoid possible damage to the item. Rotate the Screw Extension
(13.1) on the Ram (13) until it contacts the underside of the load to be lifted. Screwing
counterclockwise raises the extension, screwing clockwise lowers the extension.
4a. Pneumatic Operation:
a. Connect a pressurized air source to the Air Valve (44).
b. Engage the notch on the end of the Jack Handle (45) onto the Release Valve (4).
Turn the Release Valve slightly clockwise to ensure that the valve is closed. The jack
will not lift if the valve is open.
c. When it is safe to do so, squeeze the Air Valve (44). This will admit pressurized air
into the Air Motor (42) which will cause the hydraulic jack to lift. Continue to hold the
Throttle Lever down until the load is lifted to the desired level. Note that the maximum
ram travel is 6-½”.
4b. Manual Operation:
To manually operate the jack without use of compressed air, close the Release Valve,
then insert the end of the Jack Handle (45) into the Handle Bracket (34) and pump up
and down. This action will raise the jack.
5. Support the load using jack stands (not included) or other means to support the weight.
Do not leave the load on the jack for an extended period of time. Damage to the jack or
personal or property injury may result.
6. To lower the item, first lift the item slightly and remove the jack stands.
7. Engage notches in the end of the Jack Handle (45) onto the Release Valve (4). Turn the
valve slightly, approximately 1/4 turn to lower the load. When the load is lowered, turn
the Release Valve clockwise to stop the motion.
SKU 95553
For technical questions please call 1-800-444-3353.
Page 6
Maintenance
1. Periodically check the air and hydraulic fittings for leaks. Repair if any leak is detected.
2. Periodically lubricate all moving points of the Jack.
3. The Hydraulic Ram (13) should be kept clean, free of dirt and water, and protected from
corrosion.
4. Oil Replacement:
a. Place Jack in an upright position.
b. Completely lower the Ram (13).
c. Remove the Filler Plug (16) and keep it clean.
d. Fill with high-quality hydraulic jack oil to the lower rim of the fill hole.
e. Purge air from the hydraulic system as previously described.
f. Top off with more hydraulic oil.
g. Replace Filler Plug (16).
Troubleshooting
1. If the Jack fails to lift, or fades under load, first check that the Release Valve (4) is closed.
Engage the notches at the end of the Jack Handle (45) onto the Release Valve (4) and
turn clockwise. Check to see if this has solved the problem.
2. Next check to see if there are any leaks in the air system. Examine all connections and
valves to see if there is a leak. If so, have a qualified service technician repair the connection or replace the faulty part.
3. Check to see if there are any leaks in the hydraulic system. Leaks will produce visible
hydraulic fluid at the separation. If there are any leaks, have a qualified repair technician
tighten, repair or replace any leaking components.
4. Air in the hydraulic system will cause the jack to fade. If no leaks are detected, purge the
hydraulic system to remove any trapped air. Purging instructions are given in number
4, above.
5. The Air pump mechanism may be stuck. To remedy this, open the release valve, and
operate the air lever fully.
6. If none of these troubleshooting options solves the problem, it is possible that the seals of
the jack have been damaged by overloading, dirt on the ram or other environmental factors. Have a qualified service technician inspect the Jack for faults and possible repair.
REV 07e
SKU 95553
For technical questions please call 1-800-444-3353.
Page 7
Hydraulic Jack Parts List
Part
Description
Q’ty
Part
Description
Q’ty
1
Base
1
23
Nut
2
2
Ball
6
24
Lock Washer
2
3
Seal
1
25
Washer
2
4
Release Valve
1
26
Pump Cylinder
1
5
Ball Cup
2
27
O-ring
1
6
Spring
1
28
Nylon Ring
1
7
Spring
1
29
Backup Ring
1
8
Screw
2
30
Piston
1
9
Nylon Ring
1
31
Pin
3
10
Cylinder
1
32
R-Pin
3
11
O-ring
1
33
Connector
1
12
Cup Seal
1
34
Handle Bracket
1
13
Ram
1
35
Ball
1
Extension Screw
1
36
Ball Cup
1
14
Packing
1
37
Spring
1
15
Reservoir
1
38
Screw
1
16
Filler Plug
1
39
O-ring
1
17
Nylon Ring
1
40
Screw
1
18
Top Nut
1
41
Plastic Cap
1
19
O-ring
1
42
Air Motor Assembly*
1
20
Spring Plate
1
43
Air Hose
1
21
Return Spring
2
44
Air Valve Assembly*
1
22
Eye Bolt
2
45
Handle
2
13.1
This parts list refers to the Assembly Diagram on page 9.
* Air Motor Assembly (42) and Air Valve Assembly (44) may be replaced as
assemblies or individual parts may be replaced. Please see Air Motor parts
information on pages 10 and 11.
SKU 95553
For technical questions please call 1-800-444-3353.
Page 8
Hydraulic Jack Assembly Diagram
Note: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
Note: Assemblies 42 and 44 are shown in more detail on page 12.
SKU 95553
For technical questions please call 1-800-444-3353.
Page 9
Air Motor Parts List
Part
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
Description
Air Pump Cylinder
Nut
Sealing Ring
Nylon Ring
Copper Ring
Air Cylinder Seat
Nut
Spring
Air Pump Piston
O-ring
Big Piston
Air Cylinder
Screw
Lock Washer
Safety Cover
Filter
Silencing Pad
Small Piston
O-ring
O-ring
Sealing Ring
Bolt
Nylon Ring
O-ring
Q’ty
Part
1
1
1
1
1
1
1
1
1
2
1
1
2
2
1
1
1
1
1
1
1
3
1
2
A25
A26
A27
A28
A29
A30
A31
A32
A33
A34
A35
A36
A37
A38
A39
A40
A41
A42
A43
A44
A45
A46
A47
A48
Description
O-ring
Air Cylinder Cap
Bolt
Coupler Seat
Retaining Ring
O-ring
Coupler
Air Hose
Lock Lever
Lever
Nut
O-ring
O-ring
Packing
Throttle
Spring
Lock Nut
Bolt
Valve Body
Inlet
Screen
O-ring
Quick Coupler, Male
Coupler Seat
Q’ty
1
1
3
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT
HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE
IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER
AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT
BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR
HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
SKU 95553
For technical questions please call 1-800-444-3353.
Page 10
Air Motor Assembly Diagram
SKU 95553
For technical questions please call 1-800-444-3353.
Page 11
LIMITED 90 DAY WARRANTY
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality
and durability standards, and warrants to the original purchaser that this product is free from
defects in materials and workmanship for the period of 90 days from the date of purchase. This
warranty does not apply to damage due directly or indirectly, to misuse, abuse, negligence or
accidents, repairs or alterations outside our facilities, criminal activity, improper installation,
normal wear and tear, or to lack of maintenance. We shall in no event be liable for death,
injuries to persons or property, or for incidental, contingent, special or consequential damages
arising from the use of our product. Some states do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation of exclusion may not apply to
you. This warranty is expressly in lieu of all other warranties, express
or implied, including the warranties of merchantability and fitness.
To take advantage of this warranty, the product or part must be returned to us with
transportation charges prepaid. Proof of purchase date and an explanation of the complaint
must accompany the merchandise. If our inspection verifies the defect, we will either repair or
replace the product at our election or we may elect to refund the purchase price if we cannot
readily and quickly provide you with a replacement. We will return repaired products at our
expense, but if we determine there is no defect, or that the defect resulted from causes not
within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which
vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
SKU 95553
For technical questions please call 1-800-444-3353.
Page 12
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