2-1/2, 3 and 4 Ton
Service Jacks
Specifications
68048 3 Ton Service Jack
Weight Capacity 3 Tons (6,000 lb.)
Maximum Height 18-1/4"
Minimum Height 5"
68049 2-1/2 Ton Low Profile Service Jack
Weight Capacity 2.5 Tons (5,000 lb.)
Maximum Height 20-1/16"
Minimum Height 2-7/8"
68056 4 Ton Service Jack
Weight Capacity 4 Tons (8,000 lb.)
Maximum Height 20-1/2"
Minimum Height 4"
When unpacking, make sure that the product is intact and undamaged. If any parts are missing or broken,
please call Harbor Freight Tools at 1-800-444-3353 as soon as possible.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts.
©
®
Copyright 2010 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.
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5. Tighten the Fill Screw (Fig. 2).
Jack Components
Adding Oil
1. Remove the Fill Screw (Fig. 2).
Handle
2. Add qualified hydraulic oil of high grade into the Fill
Screw (Fig. 2) slowly until the oil reaches the top of the
oil fill hole.
Saddle
Oil Fill Screw
(Not Shown)
Note: Do not touch the assembled Handle when adding the
hydraulic oil.
Lifting Arm
Handle Socket
3. Replace the Fill Screw (Fig. 2)
Lifting
1. Park vehicle on a flat, level, solid, surface safely
away from oncoming traffic. Turn off the vehicle’s
engine. Place the vehicle’s transmission in “PARK”
(if automatic) or in its lowest gear (if manual). Set the
vehicle’s emergency brake. Then, chock the wheels
that are not being lifted.
Rear Caster
Fig. 1
U-Joint (Not Shown)
U-Joint
2. Turn the Handle counterclockwise to lower the Jack.
Once the Jack is fully lowered, turn the Handle firmly
clockwise to close it.
Safety Valve Cover
DO NOT OPEN
OR ADJUST
3. Carefully position the Saddle of the Jack (Fig. 1)
under the vehicle manufacturer’s recommended lifting
point.(See vehicle manufacturer’s owner’s manual
for location of frame lifting point when lifting only one
wheel and frame lifting points when lifting the entire
front or rear end of the vehicle.)
Fill Screw
4. Pump the Handle until the top of the Jack’s Saddle has
nearly reached the vehicle lifting point.
Note: The Jack should be positioned at 90° to the vehicle’s
lifting point to ensure the Jack’s Saddle and vehicle lifting
point are in alignment. If not, reposition the Jack before
lifting the vehicle.
Hydraulic Unit
Fig. 2
5. To lift the vehicle, pump the Handle of the Jack. Use
smooth, full strokes for best results.
Setup and Operation
6. Once the vehicle is raised, slide a jack stand of
appropriate capacity (not included) under the proper
lifting point referred to in the vehicle owner’s manual.
Always use two jack stands, position them at the same
point on each side of the vehicle.
Attaching the Handle
1. Fasten the Upper Handle to the Lower Handle.
2. Loosen the Set Screw and insert the assembled
Handle into the Handle Socket.
3. Tighten the Set Screw.
The rated capacity of jack stands is per pair, not the
individual capacities combined unless specifically noted on
the product by the jack stand manufacturer. Do not exceed
rated jack stand capacity. Ensure that the vehicle support
points are fully captured between the outer lugs of both jack
stands. Use a matched pair of jack stands per vehicle to
support one end only. Use 1 pair per vehicle only. Failure to
do so may result in sudden loss of load, which may cause
personal injury and/or property damage.
Bleeding
1.
Loosen the Fill Screw (Fig. 2).
2. Insert the assembled Handle into the Handle Socket (Fig.
1) to operate the Release Valve.
3. Turn the Handle (Fig. 1) counterclockwise to open valve.
4. Pump the Handle (Fig. 1) up and down quickly for several
times to purge the air from the system.
SKU 68048, 6049, 6056
For technical questions, please call 1-800-444-3353
Page: 2
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7. Center the vehicle’s lifting point(s) on the saddle of the
jack stand(s). Set the jack stand(s) according to the
manufacturer’s instructions, making sure that they lock
securely into position.
C. With the Jack upright, completely fill the Housing
with a high quality hydraulic oil (not included) until
the oil is 1/4″ below the fill hole.
D. Open the valve by turning the Handle
counterclockwise and pump the Handle to bleed air
from the system.
Note: Always set both Jack Stands at the same height.
8. Slowly turn the Handle counterclockwise to lower the
vehicle onto the saddle(s) of the jack stand(s). Then,
turn the Handle firmly clockwise to close it.
E. Recheck oil level and re-fill as needed.
F. Reinstall the Oil Filler Plug.
7. Wipe dry with a clean cloth. Then, store the Jack in
a safe, dry location out of reach of children and other
non-authorized people.
Lowering
1. Carefully remove all tools, parts, etc. from under
the vehicle.
2. Position the Saddle under the lifting point. Turn the
Handle firmly clockwise and raise load high enough
to clear the jack stands, then carefully remove jack
stands.
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
3. Slowly turn the Handle counterclockwise (never more
than 1/2 full turn) to lower the vehicle onto the ground.
4. Lower the Jack completely. Then, store in a safe, dry
location out of reach of children.
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.
Inspection, Maintenance, & Cleaning
Procedures not specifically explained in this
manual must be performed only by a qualified
technician.
To prevent serious injury from tool failure:
Do not use damaged equipment. If abnormal noise or
vibration occurs, have the problem corrected before further
use.
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.
1. Before each use, inspect the general condition of the
Jack. Check for broken, cracked, or bent parts, loose
or missing parts, and any condition that may affect the
proper operation of the product. If a problem occurs,
have the problem corrected before further use.
Do not use damaged equipment.
2. Before each use, thoroughly test the Jack for proper
operation prior to its actual use. If the Jack appears
not to be working properly, follow Bleeding instructions
on page 2.
3. Change the hydraulic oil at least once every three
years:
This warranty gives you specific legal rights and you may
also have other rights which vary from state to state.
A. With the Jack fully lowered, remove the Oil Filler
Plug on the side of the Housing.
B. Tip the Jack to allow the old hydraulic oil to drain
out of the Housing completely, and dispose of
the old hydraulic oil in accordance with local
regulations.
SKU 68048, 6049, 6056
For technical questions, please call 1-800-444-3353
Page: 3
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Troubleshooting
To Prevent Serious Injury:
Use caution when troubleshooting a malfunctioning jack. Stay well clear of the supported load.
Completely resolve all problems before use. If the solutions presented in the Troubleshooting guide do not solve the
problem, have a qualified technician inspect and repair the jack before use.
After the jack is repaired: Test it carefully without a load by raising and lowering it fully, checking for proper operation,
BEFORE RETURNING THE JACK TO OPERATION.
DO NOT USE A DAMAGED OR MALFUNCTIONING JACK!
POSSIBLE SYMPTOMS
PROBABLE SOLUTION
(Make certain that the jack is not
supporting a load while attempting a
solution.)
Handle
Jack will
not lift at
its weight
capacity
Pump
stroke
feels
Saddle
lowers
under load
Saddle will moves up Oil leaking
not lift all
the way
when jack from filler
is under
load
plug
spongy
Check that Release Valve is fully closed.
Bleed air from the system.
X
X
X
X
Valves may be blocked and may not close
fully. To flush the valves:
1. Lower the Saddle and securely close
the Release Valve.
X
2. Manually lift the saddle several inches.
3. Open the release valve and force the
saddle down as quickly as possible.
Jack may be low on oil. Check the oil
level and refill if needed.
X
X
X
Jack may require bleeding - see
instructions on page 2.
Unit may have too much hydraulic oil
inside, check fluid level and adjust if
needed.
X
SKU 68048, 6049, 6056
For technical questions, please call 1-800-444-3353
Page: 4
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Parts Lists and Assembly Diagrams
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.
68048 3 Ton Floor Jack
Main Parts List and Assembly Diagram
Part
Description
Retaining Ring (M20)
Washer
Front Wheel
Frame
Retaining Ring (M16)
Bolt
Retaining Ring (M22)
Hydraulic Adaptor
Lift Arm Assembly
Qty
2
2
2
1
2
2
2
1
Part
Description
Qty
1
1
1
1
2
1
1
1
1
2
3
4
5
6
7
8
9
20 Retaining Ring (M12)
21 Handle Socket Roller
22 Shaft
23 Handle Socket
24 Rubber Bumper
25 Screw
26 Lower Handle
27 Upper Handle
28 Nut (M16)
1
4
10 Saddle
1
1
2
1
1
2
1
2
29 Washer (M16)
30 Tie Rod
4
2
4
4
4
4
2
1
11 Saddle Screw
12 Retaining Ring (M25)
13 Lift Arm Shaft
14 Pin (M4x45)
15 Spring
31 Washer (M8)
32 Screw (M8X20)
33 Screw (M10X25)
34 Washer (M10)
35 Rear Caster Assembly
36 Cover Plate
16 Hydraulic Unit
17 Bolt
18 Washer (M18)
19 Set Screw
2
1
37 Screw
4
SKU 68048, 6049, 6056
For technical questions, please call 1-800-444-3353
Page: 5
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Parts Lists and Assembly Diagrams
68049 2-1/2 Ton service Jack
Main Parts List and Assembly Diagram
Part
Description
Retaining Ring (M20)
Washer (M20)
Front Wheel
Frame
Nut (M16)
Washer (M16)
Screw (M5X12)
Rear Caster Assembly
Screw (M10X20)
Qty
2
2
2
1
4
4
4
2
Part
Description
Qty
1
1
1
1
1
1
2
2
1
2
3
4
5
6
7
8
9
17 Set Screw
18 Upper Handle
19 Lower Handle
20 Screw (M6X35)
21 U-Joint
22 Hydraulic Unit
23 Spring
24 Retaining Ring (M22)
25 Hydraulic Unit Adaptor
26 Pin (A4x55)
4
4
1
1
10 Washer (M10)
11 Bolt
2
2
1
1
1
1
27 Retaining Ring (M25)
28 Lift Arm Shaft
29 Cover Plate
30 Saddle
31 Saddle Screw
32 Handle Bumper
2
1
1
1
1
1
12 Washer (M18)
13 Retaining Ring (M12)
14 Handle Socket Roller
15 Handle Socket
16 Shaft
32
SKU 68048, 6049, 6056
For technical questions, please call 1-800-444-3353
Page: 6
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Parts Lists and Assembly Diagrams
68056 4 Ton service Jack
Main Parts List and Assembly Diagram
Part
Description
Retaining Ring (M20)
Front Wheel Washer
Front Wheel
Frame
Rear Caster
Screw (M12X25)
Washer (M12)
Washer (M16)
Qty
2
2
2
1
2
4
4
4
2
4
4
4
2
2
2
4
Part
Description
Qty
1
1
1
1
1
2
1
2
1
1
1
2
2
2
1
1
1
2
3
4
5
6
7
8
9
20 Lower Handle
21 Set Screw
22 Handle Socket
23 Hydraulic Unit
24 U-Joint
25 Spring
26 Cover Plate
27 Retaining Ring (M25)
28 Pin (M4X45)
29 Hydraulic Unit Adaptor
30 Lift Arm Shaft
31 Bolt
32 Retaining Ring (M18)
33 Radius Link
34 Zerk
35 Lift Arm
36 Saddle
37 Saddle Screw
38 Handle Bumper
Retaining Ring (M30)
10 Screw (M5X12)
11 Screw (M8X20)
12 Washer (M8)
13 Tie Rod
14 Bolt
15 Washer (M18)
16 Nut (M16)
17 Rubber Bumper
18 Upper Handle
19 Screw
2
1
1
1
1
1
SKU 68048, 6049, 6056
For technical questions, please call 1-800-444-3353
Page: 7
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Notes
SKU 68048, 6049, 6056
For technical questions, please call 1-800-444-3353
Page: 8
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3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
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