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

Low Profile Floor Jack 

        

Set Up

  Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this 

manual including all text under subheadings therein before set up or use of this product.

Removing Shipping Block

CAUTION! The Handle Socket will be held down by a plastic block under tension. 

Wear ANSI-approved safety goggles before freeing Handle Socket.  Hold Handle Socket down while 

removing block.  After removal, carefully swing Handle Socket up until tension is released. 

A plastic block holds the Handle Socket in position during shipment.  This 

helps prevents shipping damage.  To remove it:

1.  Press down on the Handle Socket to 

relieve tension on the plastic block.

2.  Remove plastic block from the bar.

3.  Slowly raise the Handle Socket 

until tension is released.

Attaching the Handle

1.  Slide the Upper Handle into the Lower Handle.  

Line the Button on the Lower Handle up with the 

hole in the Upper Handle until it clicks into place.

2.  Loosen the Set Screw and insert the grooved end 

of the assembled Handle into 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.  See Figure A.

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

Check that the oil level inside the Cylinder is 

at the top of the Piston.  See Figure B.

3.  Insert the Handle into the Handle Socket 

to operate the Release Valve.

4.  Turn the Handle counterclockwise to open the valve.
5.  Pump the Handle up and down quickly 

10-15 times to force air from the system.

6.  Replace the Fill Plug, close the 

Cover Plate, and reinstall the Screws.

Fill Plug

Safety Valve Covers  

Do not open or adjust.

Figure A:  Hydraulic Unit

Adding Oil

NOTICE:

 To prevent damage and premature wear, 

use only non-detergent 22 weight hydraulic jack oil.
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.

2.  Remove the Fill Plug on top of the Cylinder.
3.  Add non-detergent 22 weight hydraulic jack oil 

into the Fill Plug hole slowly until the oil level just 

covers the top of the Piston inside the Cylinder.

4.  Replace the Fill Plug, close the 

Cover Plate, and reinstall the Screws.

Fill Plug

Cylinder 

Piston

Oil

FILL LEVEL

Figure B:  Fill Level

Summary of Contents for 56643

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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