Harbor Freight 8 Ton Long Ram Air Hydraulic Jack Product Manual

Manual for the 94562 8 Ton Long Ram Air/Hydraulic Jack 94562 8 Ton Long Ram Air / Hydraulic Jack

2015-05-27

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8 ton
air/hydraulic long ram jack
Model 94562
Set up and Operating Instructions

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© 2006 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. Diagrams within this manual may not be drawn proportionally. Due to continuing improvements, actual product may differ slightly from the product described herein. Tools required for assembly
and service may not be included.

For technical questions or replacement parts, please call 1-800-444-3353.
Revised Manual 10d

Specifications
Lifting Capacity

8 Tons (16,000 Pounds)

Ram Diameter

1.33”

Required Air Pressure

110 ~ 120 PSI

Stroke

18-5/8”

Air Flow Required

7 CFM

Ram Mounting Holes

5/8” Diameter

Air Inlet Size

1/4” – 18 NPT

Handle Length

20”

Minimum Height

24-1/4”

Hose Length

48”

Maximum Height

42-7/8”

Unit Weight

36 Pounds

Save This Manual
You will need this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures, parts list and assembly diagram.
Keep your invoice with this manual. Write the invoice number on the inside of the front
cover. Keep this manual and invoice in a safe and dry place for future reference.

Unpacking
When unpacking, check to make sure all the parts shown in the Parts Lists on pages
11 and 12 are included. If any parts are missing or broken, please call Harbor Freight Tools
at the number shown on the front cover of this manual as soon as possible.

General Safety Rules
IMPORTANT SAFETY INSTRUCTIONS
WARNING!
READ AND UNDERSTAND ALL INSTRUCTIONS
Failure to follow all instructions detailed in this manual may
result in serious personal injury.
SAVE THESE INSTRUCTIONS

Work Area
1.

Keep your work area clean and well lit. Cluttered and dark work areas invite
accidents.

Keep bystanders, children, and visitors away while using the Long Ram
Jack. Distractions can cause you to lose control.

Personal Safety
1.

Stay alert. Watch what you are doing, and use common sense during use. Do
not use the Long Ram Jack while tired or under the influence of drugs, alcohol,

SKU 94562

For technical questions, please call 1-800-444-3353

PAGE 2

or medication. A moment of inattention while operating power tools may result in
serious personal injury.
2.

Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep
your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or
long hair can be caught in moving parts.

Do not overreach. Keep proper footing and balance at all times. Proper footing
and balance enables better control in unexpected situations.

Always wear eye and hand protection. Wear ANSI-approved safety impact goggles, non-skid safety shoes, and heavy duty work gloves when using this product.

Tool Use and Care
1.

Store idle tools and equipment out of reach of children and other untrained
people. Tools and equipment are dangerous in the hands of untrained users.

Maintain the Long Ram Jack with care. Keep this product clean. A properly
maintained tool is easier to control. Do not use damaged tools and equipment. Tag
damaged tools and equipment “Do not use” until repaired.

Check for misalignment or binding of moving parts, loose or broken parts, and
any other condition that may affect the Long Ram Jack’s operation. If damaged, have the tool serviced before using. Many accidents are caused by poorly
maintained tools and equipment.

Use only accessories that are recommended by the manufacturer for your
model. Accessories that may be suitable for one product may become hazardous
when used on another product.

Service
1.

Tool service must be performed only by qualified service technician. Service
or maintenance performed by unqualified personnel could result in a risk ofinjury.

When servicing the Long Ram Jack, use only identical replacement parts.
Follow instructions in the “Inspection, Maintenance, And Cleaning” section of this
manual. Use of unauthorized parts or failure to follow maintenance instructions may
create a risk of electric shock or injury.

SKU 94562

For technical questions, please call 1-800-444-3353

PAGE 3

Specific Safety Rules
1.

Prior to assembling the Long Ram Jack onto a shop crane, make sure to read
and understand all instructions and safety precautions as outlined in the shop
crane manufacturer’s manual. Make sure the Long Ram Jack is fully compatible
with the shop crane.

WARNING! Do not exceed the maximum lifting capacity of this Long Ram
Jack (8 tons / 16,000 pounds). Exceeding the maximum lifting capacity could
cause personal injury and/or property damage.

Maintain labels and nameplates on the Long Ram Jack. These carry important
information. If unreadable or missing, contact Harbor Freight Tools for a replacement.

Use the right product for the job. There are certain applications for which this
product was designed. Do not use this product for a purpose for which it was not
intended.

WARNING! The Long Ram Jack mounting holes are 5/8” diameter. Do not attempt to drill or alter the mounting holes.

WARNING! The two 5/8” diameter Pins (not included) used to attach the Long Ram
Jack to a shop crane must be rated to support at least 8 tons (16,000 pounds) of
pressure and must have R-Pins (not included) to lock the two Pins in place.

Do not use the Long Ram Jack in an unsupported application. Twisting or
sideways forces could cause the Jack to unexpectedly fail.

The Long Ram Jack is designed for short-term lifting of loads. Do not use for
extended lifting of loads.

Stay clear of a shop crane. Never go under an object being lifted by the crane. It
is possible for an object to fall, possibly resulting in serious injury and/or property
damage.

10.

Immediately after lifting, support the load with appropriate supporting equipment such as jack stands (not included) of adequate capacity. DO NOT work
under a load which is supported only by the Long Ram Jack.

11.

Use the Long Ram Jack with a shop crane only on a flat, level, solid surface
capable of supporting the weight of the Jack, crane and the weight of the
object being lifted.

12.

Industrial applications must follow OSHA requirements.

13.

Always monitor the object being lifted so it does not rock back and forth.

14.

Before lowering a load, make sure there are no obstructions underneath and
that all other personnel are standing clear.

SKU 94562

For technical questions, please call 1-800-444-3353

PAGE 4

15.

Do not attempt to move a load while it is supported by the Long Ram Jack.
The Jack must only be used in a static position for lifting and lowering loads.

16.

Compressed air only. Use clean, dry, regulated, compressed air between 110
and 120 PSI. Never use oxygen, carbon dioxide, combustible gases, or any other
bottled gas as a power source for this product.

17.

This Jack is intended for use on a shop crane (not included), properly attached. The shop crane to which the Long Ram Jack will be installed must
be designed to use an 8 ton (16,000 pound) capacity Long Ram Jack.

18.

The Long Ram Jack is designed for vertical, or near vertical, use only. Do not
use in a horizontal or upside down position.

19.

NEVER attempt to adjust the factory pre-set Safety Valve on the Long Ram
Jack.

20.

Not to be used for aircraft purposes.

21.

WARNING! The warnings and cautions discussed in this 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.
SAVE THESE INSTRUCTIONS

ASSEMBLY INSTRUCTIONS
1.

NOTE: To attach the Long Ram Jack onto a shop crane you will need two 5/8”
diameter Pins of appropriate length and two R-Pins (neither included).
PIN
5/8” DIAMETER

R-PIN

FIGURE A
WARNING! The Pins must be rated to support at least 8 tons
(16,000 pounds) of pressure. (See Figure A.)

SKU 94562

For technical questions, please call 1-800-444-3353

PAGE 5

RAM
(13)

RELEASE VALVE
(4)
HANDLE
(21)

BASE
(1)

FIGURE B
2.

Place the end of the Handle (21) over the Release Valve (4), and turn the Handle
counterclockwise to fully lower the Ram (13). Then, remove the Handle.
(See Figure B.)
SHOP CRANE
(NOT INCLUDED)

BOOM

INSERT PIN & R-PIN HERE
o

PILLAR

FILLER PLUG
(17)
RESERVOIR
(16)

INSERT PIN & R-PIN HERE

FIGURE C
3.

Lower the Boom on the shop crane (not included). (See Figure C.)

With assistance, align the mounting hole in the Ram (13) with the mounting hole
located in the Boom of the shop crane. Insert one Pin completely through both
mounting holes. Then, secure the Pin in place with one R-Pin.
(See Figures B and C.)

Align the two mounting holes in the Base (1) of the Long Ram Jack with the mounting hole located in the Pillar of the shop crane. Insert the remaining Pin completely
through the mounting holes in the Base and the Pillar. Then, secure the Pin in place
with the remaining R-Pin. (See Figures B and C.)

IMPORTANT: The Long Ram Jack already contains some hydraulic oil in its Reservoir (16). Even so, it is recommended that you check the oil level in the Reservoir

SKU 94562

For technical questions, please call 1-800-444-3353

PAGE 6

prior to the shop crane’s first use and, if necessary, top off the Reservoir with the
proper amount of hydraulic oil. To do so, remove the Filler Plug (17) located on the
Reservoir. Top off the Reservoir with hydraulic oil. Make sure the Release Valve
(4) is closed. Insert the Handle (21) in the Handle Bracket (31) and slowly pump
the Handle until a slight amount of oil begins to leak out of the oil fill hole. Then,
replace the Filler Plug. Make sure to test the shop crane’s performance several
times before attempting to lift an object with the crane.
Once satisfied that the crane is operating properly, then the crane is ready to
lift an object. (See Figure C.)

OPERATING INSTRUCTIONS
MANUAL OPERATION

HANDLE
(21)

FIGURE D
To Operate Manually:
1.

Position the shop crane so that its Hook is directly above the object you wish to lift.
(See Figure D, next page.)

WARNING! Stay clear of the shop crane. Never go under an object being lifted
by the crane. It is possible for its Hook to slip, causing an object to fall, possibly
resulting in serious injury and/or property damage.

Use the Handle (21) of the Long Ram Jack to open the Release Valve (4) and lower
the Hook. Attach the Hook to the object you are lifting. Then close the Release
Valve, and pump the Handle to raise the object. Carefully move the engine crane
to the location where you wish to lower the object, i.e., an engine stand, proper
support, floor surface, etc. Then lower the object by opening the Release Valve
slightly. Once the object is fully lowered, disconnect the Hook from the object.
(See Figures B and D.)

SKU 94562

For technical questions, please call 1-800-444-3353

PAGE 7

COMPRESSED AIR OPERATION

AIR VALVE
(32)
CONNECT
TO
AIR
SUPPLY

FIGURE F
To Operate, Using Compressed Air:
1.

For best service, you should incorporate an oiler, regulator, and in-line filter, as
shown in the diagram below. Hoses, couplers, oilers, regulators, and filters are all
available at Harbor Freight Tools. NOTE: If an automatic oiler is not used, put 3-5
drops of pneumatic Tool Oil (not included) in the Long Ram Jack’s Quick Coupler
(A41) before each use. (See Figure E.)
REGULATOR

TO
LONG
RAM
JACK

OILER

FILTER

FIGURE E

Use the Handle (21) of the Long Ram Jack to open the Release Valve (4) and lower
the Hook. Attach the Hook to the object you are lifting. Then close the Release
Valve and remove the Handle. (See Figures B, and F, next page.)

Connect an air supply hose to the Quick Connector (A41) on the Air Valve (32) of
the Long Ram Jack. (See Figure F.)

Turn on the air compressor, and set its regulator at 110 to 120 PSI. Do not exceed
120 PSI.

Squeeze the Lever of the Air Valve (32) to raise the object. Once raised, release
pressure on the Lever. Carefully move the engine crane to the location where you
wish to lower the object, making sure not to damage the air supply hose of the
compressor. Then lower the object by opening the Release Valve slightly with the
Handle (21) of the Long Ram Jack. Once the object is fully lowered, disconnect the
Hook from the object. Turn off the air compressor. Then squeeze the Lever of the

SKU 94562

For technical questions, please call 1-800-444-3353

PAGE 8

Air Valve once again to release any remaining air pressure from the system. (See
Figures B and F.)
6.

When finished using the Long Ram Jack and shop crane, store the equipment in a
clean, dry, safe location out of reach of children and other unauthorized people.

INSPECTION, MAINTENANCE, AND CLEANING
1.

Before each use, inspect the general condition of the Long Ram Jack. Check for
cracked, worn or damaged parts, loose or missing parts, low or no hydraulic oil, and
any other condition that may affect the tool’s safe operation. If a problem occurs,
have the problem corrected before further use.
Do not use damaged equipment.

To clean, use a damp cloth and a mild detergent. Do not use solvents or other
flammable agents.

If lifting performance of the Long Ram Jack begins to diminish, check the
hydraulic oil level in the Reservoir (16). If necessary, top off the Reservoir with
hydraulic oil. (See Step #6, page 6-7.)

Drain and replace the hydraulic fluid at least once a year. If you are uncertain
how to do this, have the service performed by a qualified technician.

To bleed the Long Ram Jack, remove the Filler Plug (17) located on the Reservoir (16). Make sure the Release Valve (4) is closed. Insert the Handle (21) in the
Handle Bracket (31) and slowly pump the Handle until a slight amount of oil begins
to leak out of the oil fill hole. Top off the Reservoir with hydraulic oil. Then, replace
the Filler Plug. Make sure to test the Long Ram Jack’s performance several
times before attempting to lift an object with the shop crane.
Once satisfied that the shop crane is operating properly, then the crane is
ready to lift an object. (See Figure D.)

When storing, keep the Long Ram Jack and shop crane in a clean, dry, safe location out of reach of children and other unauthorized people.

CAUTION! All maintenance, service, and repairs not discussed in this manual
should only be performed by a qualified service technician.

SKU 94562

For technical questions, please call 1-800-444-3353

PAGE 9

TROUBLESHOOTING
Problem

Possible Causes

Possible Solution

Jack will not lift load.

1. Release Valve not tightly closed.
2. Overload condition.
3. Air supply inadequate.
4. Air trapped in system.

1. Close Release Valve firmly.
2. Do not exceed 8 ton lifting capacity.
3. Ensure adequate air supply.
4. Purge air from system.

Jack will lift, but will not maintain
pressure.

1. Release Valve not tightly closed.
2. Overload condition.
3. Hydraulic unit malfunction or defective
seals.

1. Close Release Valve firmly.
2. Do not exceed 8 ton lifting capacity.
3. Have a qualified service technician
check the hydraulic unit.

Jack will not lower after it is raised.

1. Reservoir overfilled.
2. Linkages binding.

1. Drain oil to proper level.
2. Clean and lubricate moving parts.

Poor lift performance.

1. Hydraulic oil level low.
2. Air trapped in system.

1. Add oil to proper level.
2. Purge air from system.

Hydraulic oil level low.

Add oil to proper level.

Will not lift to maximum height.

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

PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY
DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR
DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER 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 RISKS 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 94562

For technical questions, please call 1-800-444-3353

PAGE 10

PARTS LIST & ASSEMBLY DIAGRAM
Part

Description

Qty.

Part

Description

Qty.

Part

Description

Qty.

Base

Packing

R-Pin

Ball

Reservoir

Connector

Seal

Filler Plug

Handle Bracket

Release Valve

Nylon Ring

Air Valve

Ball Cup

Top Nut

Air Hose

Spring

O-Ring

Air Motor

Spring

Handle

Ball

Screw

Copper Washer

Ball Cup

Nylon Ring

Pump Cylinder

Spring

Cylinder

O-Ring

Screw

O-Ring

Nylon Ring

O-Ring

Cup Seal

Back-Up Ring

Screw

Ram

Piston

Plastic Cap

Ring

NOTE:
Some parts are listed and shown for illustration purposes only,
and are not available individually as replacement parts.

SKU 94562

For technical questions, please call 1-800-444-3353

REV 10d

PAGE 11

PARTS LIST & ASSEMBLY DIAGRAM A - AIR MOTOR
Part

Qty.

Part

Qty.

Part

A01

Air pump cylinder

Description

A20

Air Cylinder Cap

Description

A37

Valve Body

Description

Qty.
1

A02

Nut

A21

Bolt

A38

Screw

A03

Sealing Ring

A22

Coupler Seat

A39

Screen

A04

Nylon Ring

A23

Retaining Ring

A40

O-Ring

A05

Copper Ring

A24

O-Ring

A41

Quick Coupler-male

A06

Air Cylinder Seat

A25

Coupler

A42

Bolt

A07

Nut

A26

Air Hose

A43

O-Ring

A08

Spring

A27

Lock Lever

A44

O-Ring

A09

Air Pump Piston

A28

Lever

A45

Coupler Seat

A10

O-Ring

A29

Nut

A46

Screw

A12

Large Piston

A30

O-Ring

A47

Lock Washer

A13

O-Ring

A31

O-Ring

A48

Safety Cover

A14

Small Piston

A32

Packing

A49

Filter

A15

O-Ring

A33

Throttle

A50

Silencing pad

A17

Sealing Ring

A34

Spring

A18

Nylon Ring

A35

Lock Nut

A19

Air Cylinder

A36

Bolt

NOTE:
Some parts are listed and shown for illustration purposes only,
and are not available individually as replacement parts.

SKU 94562

For technical questions, please call 1-800-444-3353

REV 10d

PAGE 12

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Harbor Freight 8 Ton Long Ram Air Hydraulic Jack Product Manual

Manual for the 94562 8 Ton Long Ram Air/Hydraulic Jack 94562 8 Ton Long Ram Air / Hydraulic Jack

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