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

Item 64200 

        

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

(Jack must not be supporting a load 

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 

oil or Jack will not 

lower without a load

X

X

Check that Release Valve 

is fully closed. 

Bleed trapped air from the hydraulics. 

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.

2.  Manually lift the saddle 

several inches.

3.  Open the release valve 

and force the saddle down 

as quickly as possible.

X

X

Jack may be low on oil.   

Check the oil level and fill if needed.  

See step 4 on facing page.
Jack may have air trapped 

in the hydraulics.   

Follow instructions for 

Bleeding Trapped Air on page 6.

X

Jack may have too much 

hydraulic oil inside, check 

fluid level and adjust if needed.

Fill Plug

Cylinder 

Piston

Oil

FILL LEVEL

Summary of Contents for DS300S

Page 1: ...eference 22h 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 2020 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 ma...

Page 2: ...t 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 between Saddle Pad or Saddle and lifting point Objects placed on the Saddle will reduce the stability of the Jack and could allow the vehicle to slip off the Saddle and fall 19 The warnings precautions and instructions discussed in this manual ca...

Page 3: ... 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 situation which if not avoided could result in death or serious injury Indicates a hazardous situation which if not avoided could result in minor or moderate injury Addresses practices not related to personal in...

Page 4: ...ity 3 Tons Weight Capacity lb 6 000 Maximum Height in 17 875 Minimum Height in 5 Handle Length in 45 Front Wheel Diameter in 3 15 Front Wheel Width in 1 89 Rear Caster Diameter in 2 44 Rear Caster Width in 0 98 Saddle Pad Size in 3 27 x 3 27 sq Hydraulic Oil non detergent 22 weight Weight lb 70 5 ...

Page 5: ...Page 5 For technical questions please call 1 888 866 5797 Item 64200 Overview Saddle Handle Foam Bumper Handle Socket Handle Release Lift Arm ...

Page 6: ...ke sure that it is secure 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...

Page 7: ...them at the same point on each side of the vehicle WARNING 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 seated in the saddle of both jack stands Use a matched pair of jack stands per vehicle to suppo...

Page 8: ...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 in...

Page 9: ...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 oil or Jack will not lower without a load X X Check that Release Valve is fully closed Bleed trapped air from the hydraulics X X X Valves may be blocked and may not close fully To flush the valves 1 Lower t...

Page 10: ...ear Caster 2 36 Cover Plate 1 37 Screw M5X12 4 38 Nut M16 2 39 Saddle Pad 1 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 MAKE ANY REPAIRS TO THE PRODUC...

Page 11: ... 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 Specify UPC 193175358769 when ordering parts Assembly Diagram ...

Page 12: ...lusion 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 expl...

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