STELS 51134 - Инструкция по эксплуатации - Страница 14

14

ENG

MAINTENANCE

When the jack is not used, the lifting arm of the jack should be fully lowered. This will prevent rusting  

of the lifting arm piston rod.

Periodically lubricate moving parts of the jack: lifting arm piston rod, pump rods, axles and bearings  

of the wheels. Use any engine oil for the purpose. Provision is made to lubricate the axle of the lifting arm 

through a special lubrication nipple.

Do not use gasoline, kerosene, solvents and abrasive substances for cleaning the jack. They may damage rubber 

seals and cause oil leakage.

Store jack on level surface in a clean and dry place. When doing so, see that the lifting arm of the jack is fully 

lowered, and the release valve is fully closed.

The repair of the item should be performed only by highly qualified specialists of the servicing center. The list  

of service centers is presented in the warranty card 

TROUBLESHOOTING CHART

Symptom

Possible cause

Corrective action

Jack will not lift or 

lower load

Insufficient oil level

Check oil level as per the following instructions: 

1. Turn the release valve counterclockwise so that the piston 

goes down fully. If the lifting arm does not go down, use force.

2. Place jack in a vertical position, open oil filler plug. Oil level 

should be at the level of the lower point of the filler hole.  

If the oil level is lower, top up oil to the required level. Use only 

recommended type of oil.

3. Return the oil filler plug back home.

4. Close the release valve and lift fully and lower the lifting arm 

of the jack several times. This will help fully distribute oil 

in the whole system. In most cases, this helps to restore  

the serviceability of the item.

5. Check operation of the jack.

Air is trapped in the 

system of the jack

1. Turn the release valve counterclockwise by one full turn.

2. Insert the handle into the pump unit handle sleeve and work 

six full strokes.

3. Turn the release valve clockwise as far as it goes  

so as to close it fully.

4. Continue to pump the pump with the handle until the lifting 

arm occupies the upper position and pump handle several 

more strokes so as to blow all the air from the piston.

5. Carefully open oil filler plug partially so as to release  

the trapped air.

6. Turn the release valve counterclockwise by one full turn; 

lower the lifting arm to the extreme low position. Use force, 

if necessary.

7. Close the release valve clockwise as far as it goes and check 

serviceability of the jack. If necessary, repeat the above-

mentioned procedure one more time.

Jack will not lower fully

The return spring of the 

lifting arm has slipped 

off or is broken

Drive it home or replace.

Lubricate all moving parts of the lifting arm.

Oil level is too high

Check oil level and drain excess by opening the oil filler plug.

PREPARATION TO UTILIZATION

Prior to utilization of the item all working fluid should be drained from it. To do this, turn the release valve 

counterclockwise so that the piston goes full way down, and then close the valve. Open the oil filler plug 

and drain all the oil.

HYDRAULIC FLOOR JACK