Central Hydraulics Automobile Parts 4172 Users Manual

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For technical questions and replacement parts, please call 1-800-444-3353

Copyright 2003 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.

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http://www.harborfreight.com

Model 4172

2-1/4 TON

FLOOR JACK

ASSEMBLY and OPERATING INSTRUCTIONS

For technical questions and replacement parts, please call 1-800-444-3353

Copyright 2003 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.

®

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http://www.harborfreight.com

Model 4172

2-1/4 TON

FLOOR JACK

ASSEMBLY and OPERATING

INSTRUCTIONS

R

Page 2

SKU 4172

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 lighted.

3. Keep children away. Children must never be allowed in the work area. Do not let

them handle the Jack.

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 protection. Always wear ANSI approved impact safety goggles.

8. Do not overreach. Keep proper footing and balance at all times. Do not reach over or

across running machines.

9. Maintain tools with care. Keep tools clean for better and safer performance. Follow

instructions for lubricating and changing accessories. Inspect tool periodically, and

if damaged, have it repaired by an authorized technician. The handle must be kept

clean, dry, and free from oil and grease at all times.

Lifting Capacity 2-1/4 Tons (4500 Lbs.)

Minimum Saddle Height 5”

Maximum Saddle Height 19-1/4”

Handle Length 39-1/2”

Chassis Dimensions 25-1/2” L x 13-3/4” W

Weight 69 Lbs.

Specifications

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SKU 4172

10. Stay alert. Watch what you are doing, use common sense. Do not operate any tool

when you are tired.

11. 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 the handle and pedal do not operate properly.

12. Guard against electric shock. Prevent body contact with grounded surfaces such as

pipes, radiators, ranges, and refrigerator enclosures.

13. Replacement parts and accessories. When servicing, use only identical

replacement parts. Use of any other parts will void the warranty. Only use accessories

intended for use with this tool. Approved accessories are available from Harbor Freight

Tools.

14. 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.

15. Maintenance. For your safety, maintenance should be performed regularly by a

qualified technician.

16. Jack Capacity. Never exceed the Jack’s capacity of 4500 Lbs. Check the vehicle’s

owner’s manual to determine the actual gross weight of your vehicle before attempting

to lift it.

17. Never ride on the Jack. Never ride on the Jack, and never have people or pets in the

vehicle you are raising.

18. Only use Jack to raise vehicle. After raising the vehicle, use jack stands to keep the

vehicle suspended for periods of time. Do not work on the vehicle while it is up on the

Jack. The Jack is designed for lifting the vehicle only

19. Not to be used for any aircraft purposes.

Warning!! Stand clear of the Jack when raising or lowering a vehicle.

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.

REV 04b

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SKU 4172

Unpacking

When unpacking, check to make sure the parts listed on page 6 are included. If any parts

are missing or broken, please call Harbor Freight Tools at the number on the cover of this

manual as soon as possible.

Operation

Warning!! Only operate this Jack on a level, flat, hard surface capable of supporting the

weight of the Jack, the vehicle, and the tools. Use of an uneven or weak surface can cause

damage to the floor, or cause the vehicle to become unstable and potentially fall, causing

serious damage or injury.

Warning!! Consult the vehicle’s manual for the advised lift points. Only use the advised lift

points when using this Jack. Lifting in other areas can cause damage to the vehicle and cause

an unplanned, sudden lowering of the vehicle.

Warning!! Whenever the vehicle is to remain elevated more than momentarily, install

appropriate Jack Stands (not included) under the vehicle. Never work under the vehicle un-

less jack stands have been positioned.

Warning!! Before lifting or lowering a vehicle with the Jack, block each Jack wheel to stop it

from moving. Block the vehicle’s tires that remain on the ground.

Warning!! When raising or lowering the vehicle make sure no people are in the immediate

area.

Warning!! Never exceed the Jack’s maximum capacity of 4500 Lbs.

Warning!! Put the vehicle in gear or park and engage the emergency brake before jacking

the vehicle.

Raising the vehicle.

1. Position the Jack so that the Saddle (#2-1) is at one of the recommended lifting points.

Put shims under each wheel of the Jack. Turn the Lower Handle (#11-7) clockwise to lock

the release valve. Pump the Lower Handle (#11-7) until the Saddle (#2-1) fully engages the

lifting point, then continue to pump the Jack to the needed height.

2. Use jack stands (not included) to secure the vehicle. Use your vehicle’s owner’s manual

to determine the specified points to safely position jack stands.

3. Once the vehicle is safely positioned over the jack stands, slowly turn the Lower

Handle (#11-7) counterclockwise to open the release valve to lower the vehicle onto the jack

stands.

4. To determine if the vehicle is safely up on jack stands, stand away and attempt to gently

rock the vehicle. If it sways and seems unstable, repeat the procedure and re-position the jack

stands. Test again.

5. Completely lower the Jack and remove it from under the vehicle.

Refer to the Assembly Drawing on page 7.

Assembly

1. Insert the Lower Handle (#11-7) into the Upper Handle (#11-6) and secure it with a

Screw (#11-9).

2. Insert the bottom of the Upper Handle (#11-6) into the Handle Socket (#10-3) and secure

it with the Screw (#11-1).

3. Set the Saddle Assy. (#2-1) into the hole on the Arm Assy. (#2-2).

REV 07e

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SKU 4172

Operation (continued)

Lowering Vehicles.

1. First, clear any tools or equipment from under the vehicle. Make sure there are no

obstructions.

2. Position the Jack so that the Saddle (#2-1) is at one of the recommended lifting points.

Turn the Lower Handle (#11-7) clockwise to lock the release valve. Pump the Lower

Handle (#11-7) until the Saddle (#2-1) fully engages the lifting point, then continue to pump

the Jack above the jack stands.

3. Remove the jack stands.

4. Slowly turn the Lower Handle (#11-7) counterclockwise to open the release valve, and

gently to lower the vehicle.

5. Pull the Jack clear of the vehicle and store in a safe place.

If the Jack is not performing properly, it may have air in the hydraulic system and need

to be bled.

Bleeding and filling the Jack with hydraulic oil.

1. Place the Jack on a flat, level, solid surface.

2. If just filling the Jack, open the Oil Plug (#6-2) and check the oil. Fill to the top with a high

quality hydraulic oil if necessary.

3. If bleeding, with the Oil Plug (#6-2) removed, fully open the release valve by turning the

Lower Handle (#11-7) counter-clockwise.

4. Apply pressure on the Saddle (#2-1), holding it down. Quickly crank the Lower

Handle (#11-7) ten times. This will bring all the air out of the system. Continue cranking

until no more air bubbles appear. Fill to the top with a high quality hydraulic oil if necessary.

Repeat if necessary.

5. Replace the Oil Plug (#6-2).

6. Test the Floor Jack. Make sure it is functioning properly before attempting to lift another

vehicle. Crank the Saddle (#2-1) up and down several times to make sure it is working prop-

erly. If not, repeat the above process.

1. Keep the Jack clean and dry.

2. Periodically lubricate the caster wheels with high quality grease.

3. Periodically dismantle and lubricate the handle assembly and all lift arm linkages.

4. Watch for hydraulic oil leaks. Fill oil if necessary. If leaks persist, contact an

authorized service technician.

5. If the Jack does not lift to satisfaction, take it to an authorized service technician.

General Maintenance

REV 07e

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SKU 4172

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 DISTRIBU-

TOR 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.

NOTE: Some parts are listed and shown for illustration purposes only and are not available

individually as replacement parts.

Parts List 1

REV 07e

Part Description Qty. Part Description Qty.

1--2 FRONT WHEEL 2 11--6 UPPER HANDLE 1

1--3 SPRING WASHER 15 2 11--7 LOWER HANDLE 1

2--1 SADDLE ASSEMBLY 1 11--9 SCREW M6X35 1

2--2 ARM ASSEMBLY 1 12--1 WALL PLATE ASSEMBLY 1

2--3 LINK BOLT 2 12--2 RETURN SPRING 1

2--5 COTTER PIN 4X40 1 12--3 STAY SHAFT 1

2--7 SPRING WASHER 10 3 12--4 SHAFT 1

2--8 NUT M10 3 12--5 SPRING WASHER 8 2

3--1 REAR WHEEL ASSEMBLY 2 12--6 NUT 8 2

3--3 NUT M12 4 12--8 SHAFT 1

3--4 SPRING WASHER 12 6 13--1 CYLINDER ASSEMBLY 1

3--6 SCREW M12X20 2 13--2 LEFT BOLT 1

10--1 PIN 1 13--3 WASHER 2

10--2 TORSION SPRING 1 13--4 WASHER 2

10--3 HANDLE SOCKET 1 13--5 RETAINING RING 20 2

10--6 SPRING WASHER 18 2 13--6 RETAINING RING 22 2

11--1 SCREW 1 13--7 RIGHT BOLT 1

11--2 GEAR SHAFT 1 13--8 WASHER 4

11--3 GEAR 1 13--9 SCREW M6X10 2

11--5 COTTER PIN 1 13--10 SPRING WASHER6 1

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SKU 4172

Assembly Drawing 1

REV 07e

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SKU 4172

Parts List 2

Part Description Qty. Part Description Qty.

4--1 O-RING 1 6--4 SCREW 1

4--2 TOP CUP 1 7--1 PLUNGER 1

4--3 PISTON ROD 1 7--2 BACK-UP RING 1

4--4 RETAINER PISTON 1 7--3 O-RING 1

4--5 BOWL WASHER 1 8--1 PLUG SCREW 1

4--6 O-RING 1 8--2 O-RING 1

4--7 CYLINDER 1 8--3 SPRING 1

4--8 BASE PLATE WASHER 1 8--4 SPRING BASE 1

4--9 U-WASHER 1 8--5 BALL 3.0000 1

4--10 O-RING 1 8--6 WALVE CAP 1

5--1 BASE PLATE 1 9--1 WINDING GEAR WHEEL 1

5--2 PLUG SCREW 1 9--2 O-RING 1

5--3 WASHER 1 9--3 RELEASE VALVE NUT 1

5--4 SPRING 1 9--4 RELEASE VALVE SHAFT 1

5--5a BALL 9.0000 1 9--5 RELEASE VALVE WICK 1

5--5b BALL 6.0000 2 9--7 ALUMINUM WASHER 1

5--6 FILTER OIL TUBE 1 9--8 SQUARE WASHER 1

6--1 OIL TANK 1 9--9 STEEL WASHER 1

6--2 OIL PLUG 1 9--10 WASHER 10 1

6--3 WASHER 1 9--11 TANK NUT M10 1

REV 07e

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SKU 4172 REV 07e

Assembly Drawing 2