Jackco 66300B User Manual Download Page 5

Caution: To prevent personal injury, all inspection, maintenance, and repair 

procedures must be performed when the jack is free of load. 

TROUBLESHOOTING 

Trouble

Solution

Jack will not lift load or leaks down 

excessively

1. The release valve is not closed. Turn the 

valve clockwise tightly. If this does not 

work, remove handle, lubricate handle 

receptacle and handle end, then retry.

2.Low on hydraulic fluid. Follow Step 5 of 

the "ASSEMBLY" procedure on page 3.

3.Pump seals or back-up ring may be 

defective. Clean hydraulic fluid passages, 

replace seals and refill hydraulic fluid. 

(Must be serviced by qualified service 

center

Jack will not lift to its full height

1.Low on hydraulic fluid. Follow Step 5 of 

the "ASSEMBLY" procedure on page 3.

2.The hydraulic system has trapped air. 

Follow Step 5 of the "ASSEMBLY" 

procedure on page 3.

Jack will not lower completely

Return spring is broken or linkages are 

binding. Replace spring if broken. Grease 

pivot shaft and all lift arm linkages.

Jack  will  not  lift  smoothly  or  jack 

feels spongy

The hydraulic system has trapped air. 

Follow Step 5 of the "ASSEMBLY" 

procedure on page 3.

Jack will not hold load or handle 

rises

Discharge ball is not sealing hydraulic 

system and oil may be dirty. Manually flush 

hydraulic system. Open the release valve, 

as required, to raise and lower the lift arm. 

Manually raise and lower lift arm.

5

Summary of Contents for 66300B

Page 1: ...2010 South El Monte CA 888 452 2526 3 TON LOW PROFILE FLOOR JACK USER S MANUAL MODEL 66300B This hydraulic jack conforms to all ANSI ASME safety standards To see more jackco products please visit our...

Page 2: ...autions should be taken to avoid movement of the vehicle Traffic may cause the raised vehicle to rock during roadside use of the jack Never work under a raised vehicle without supporting it with mecha...

Page 3: ...pped in the hydraulic system during shipping and handling Trapped air will affect the pumping performance of the jack If this occurs follow the air pumping procedure below a Remove the four screws tha...

Page 4: ...essive hydraulic oil may render the jack inoperative Inspect the jack before each use Take corrective action or remove the jack from service if any of the following problems are found a Cracked or dam...

Page 5: ...be serviced by qualified service center Jack will not lift to its full height 1 Low on hydraulic fluid Follow Step 5 of the ASSEMBLY procedure on page 3 2 The hydraulic system has trapped air Follow S...

Page 6: ...Wheel 2 13 Universal Joint Ass y 1 4 Rear Caster Ass y 2 14 Block Linkage incl Split Pin Ret Rings 1 5 Hex Nut Lock Washer 2 15 Grease Fitting 1 6 Yoke Retaining Bolt Washer 2 16 Retaining Ring 2 7 Ha...

Page 7: ...20 1 9 Steel ball 4 1 28 Large Pump Piston 1 10 Relief Valve Spring 2 29 O Ring 15 x 2 65 2 11 Relief Valve Bolt 2 30 Back Up Washer 20 x 15 6 x 1 25 2 12 Sealed Washer 2 31 Washer 1 13 Small Pump Ho...

Page 8: ...nufacturer This warranty shall not apply to damage due to accident negligent use and lack of maintenance abuse or applications other than the specific function the equipment or tool is designed for No...

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