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Page 8

For technical questions, please call 1-888-866-5797.

Low Profile Floor Jack 

        

Maintenance and Servicing

  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.

1. 

BEFORE EACH USE,

 inspect the general 

condition of the tool.  Check for:

•  leaking hydraulic oil,

•  loose hardware or parts, 

•  misalignment or binding of moving parts, 

•  cracked, bent or broken parts, and 

•  any other condition that may 

affect its safe operation.

Thoroughly investigate and correct the causes for 

all issues that are found.  Do not use Jack until all 

issues are understood and properly corrected.

ALSO, BEFORE EACH USE,

 thoroughly test 

the Jack for proper operation prior to actual use.   

If the Jack’s motion seems spongy or the 

Saddle does not lift completely, follow 

Bleeding instructions on page 6.

2. 

AFTER USE,

 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.

NOTICE:

  Storing the Jack in a humid area or 

exposing it to corrosive vapor voids the warranty.

3. 

Weekly - Jack Lubrication:

a.  Lubricate according to the below steps using 

only general purpose lithium grease.

b.  Inject grease into each of the grease fittings.

c.  Lubricate the linkages and pivot points lightly.

Note:

  Improper or inadequate 

lubrication voids the warranty.

4.  Change the hydraulic oil at least 

once every three years:

a.  With the Jack fully lowered, remove both Screws 

on the end of the Cover Plate that is closer to 

the Saddle.  Swing the Cover Plate open.

b.  Remove the Fill Plug on the top of the Cylinder.

c.  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.

d.  Follow instructions for Adding Oil on page 6.

e.  Replace the Fill Plug, close the 

Cover Plate, and reinstall the Screws.

f.  Follow instructions for 

Bleeding Trapped Air on page 6.

Fill Plug

Cylinder 

Piston

Oil

FILL LEVEL

Figure C:  Fill Level

Summary of Contents for 64780

Page 1: ...uture reference 22g When unpacking make sure that the product is intact and undamaged If any parts are missing or broken please call 1 888 866 5797 as soon as possible Copyright 2022 by Harbor Freight...

Page 2: ...locations 16 Inspect before every use do not use if parts are loose or damaged or if leaking hydraulic fluid 17 Do not use for aircraft purposes 18 Do not use any objects such as blocks of wood in be...

Page 3: ...y all safety messages that follow this symbol to avoid possible injury or death Indicates a hazardous situation which if not avoided will result in death or serious injury Indicates a hazardous situat...

Page 4: ...Capacity 3 Tons Weight Capacity lb 6 000 Maximum Height in 20 Minimum Height in 3 25 Handle Length in 45 50 Front Wheel Diameter in 2 36 Front Wheel Width in 1 20 Rear Caster Diameter in 2 36 Rear Cas...

Page 5: ...Page 5 For technical questions please call 1 888 866 5797 Low Profile Floor Jack Overview Saddle Handle Foam Bumper Handle Socket Handle Release Bolt not shown Lift Arm...

Page 6: ...the Handle Socket 3 Tighten the Set Screw Bleeding Trapped Air 1 With the Jack fully lowered remove both Screws on the end of the Cover Plate that is closer to the Saddle Swing the Cover Plate open S...

Page 7: ...to in the vehicle owner s manual Always use two jack stands position them at the same point on each side of the vehicle WARNING The rated capacity of jack stands is per pair not the individual capaci...

Page 8: ...n page 6 2 AFTER USE 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 NOTICE Storing the Jack in a humid area or exposing...

Page 9: ...while attempting a solution Jack will not lift at capacity Saddle lowers under load Pump stroke feels spongy or Saddle does not lift all the way Handle moves up when Jack under load Fill Plug leaking...

Page 10: ...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 Parts List and Diagram Parts Lis...

Page 11: ...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 Parts may not be in...

Page 12: ...usion 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 INCLU...

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