Sealey YAJ15-30 - Manual (Page 4)

7. MAINTENANCE
V IMPORTANT: Only fully qualified personnel should attempt maintenance or repair.
R WARNING! Disconnect jack from air supply before changing parts, servicing or performing any maintenance.
7.1. When the jack is not in use, the piston must be in the lowest position to minimise corrosion.
7.2. Keep the jack clean and lubricate all moving parts, and the air intake connector with air tool oil on a regular basis.
7.3. CHECKING OIL LEVEL
7.3.1. Fully lower jack.
7.3.2. Remove the filler plug (located next to the piston or for YAJ20-40LR it is located on the side of the jack). The oil level should be
level with the indicator inside the filler hole, for YAJ20-40LR, it should be level with the bottom of the filler hole.
7.3.3. Top up the oil level if necessary but do not overfill as the jack will become inoperative. If inadvertently overfilled the excess oil
should be poured off. After topping up or pouring off excess oil it may become necessary to purge air from the unit. See section 6.3
/ 6.4.
Note: Use a good quality Jack oil, such a SEALEY HYDRAULIC JACK OIL.
R WARNING! DO NOT use brake fluid, or any fluid other than hydraulic jack fluid as this may cause serious damage to the jack and
will invalidate the warranty!
7.4. Ensure the air filter located in the air valve is clean.
7.5. Should the piston not rise and the oil level is correct, this may indicate a problem with air seeping into the hydraulic valve passage.
Purge any air from the system. See 6.3 / 6.4.
7.6. Confirm that the piston can rise to the highest position.
7.7. Before each use check for broken, cracked, bent, or loose parts. Or any visible damage to welds, piston, pump, saddle, air
connector, levers, frame and all parts including nuts, bolts, pins and other fasteners. If any suspect item is found, remove jack from
service and take necessary action to fix the problem.
7.8. DO NOT use the jack if believed to have been subjected to abnormal load or shock. Inspect and take appropriate action.
7.9. After a year of extensive use, the oil should be replaced in order to extend the life of the jack. To drain the oil, remove the filler plug
and valve. Make sure that no dirt is allowed to enter the hydraulic system See 7.3. for refilling instructions.
7.10. Periodically check the pump piston and piston rod for signs of corrosion. Clean exposed areas with a clean oiled cloth.
IMPORTANT: NO RESPONSIBILITY IS ACCEPTED FOR INCORRECT USE OF THE MACHINE.
Air / Hydraulic products are only repaired by local service agents. We have service/repair agents in all parts of the UK. DO NOT
return jacks to us.
Please telephone us on 01284 757500 to obtain the address and phone number of your local agent. If jack is under guarantee
please contact your dealer.
7.11. DECOMMISSIONING THE JACK
7.11.1. Should the jack become completely unserviceable and require disposal, draw off the oil into an approved container and dispose of
the jack and the oil according to local regulations.
8. TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE REMEDY
Jack does not lift
but pump is ok.
1. Oil exhausted.
2. Air in hydraulic
system.
3. Defective suction or
delivery valves.
4. Defective packing or
O-ring.
5. Poor quality oil.
1. Supply oil.
2. Drain air by.
opening cap plug
of suction and
delivery valves.
3. Clean clogged
valve.
4. Replace.
5. Replace oil.
Air pump does
not operate.
1. Insufficient
compressor power.
2. Pump oil used up.
1. Use a larger
compressor.
2. Find leak and
rectify, refill with
oil. Rebuild and
lubricate air valve.
Jack stops before
end of travel.
1. Hydraulic oil is
insufficient.
1. Supply oil.
Jack Lowers or
does not hold
in the raised
position.
1. Defective suction
delivery, release or
safety valve.
2. Defective piston
packing.
1. Clean and adjust
valve.
2. Replace packing.
Lifting is slow. 1. Air leakage due to
worn servo-valve.
1. Replace servo-
valve.
Pump continues
to operate when
the air valves
are closed
1. Air valve will not close. 1. Replace Valve.
YAJ15-30.V2, YAJ15-30DC.V2,YAJ20-40.V2,
YAJ20-40DC.V2, YAJ20-40LR| Issue 2 (I) 28/04/15
Original Language Version © Jack Sealey Limited