12
5. MAINTENANCE
Monthly maintenance is recommended. Lubrication is critical to jacks as they support heavy loads. Any restric-
tion due to dirt, rust etc. can cause either slow movement or extremely rapid jerks, damaging the internal com-
ponents. The following instructions are designed to keep the jack maintained and operational.
-
Lubricate the ram, linkages, saddle and pump mechanism with light machine oil.
-
Visually inspect for cracked welds, damages, bent, loose or missing parts and hydraulic oil leaks.
-
If the jack is subjected to abnormal load or shock, or is found damaged or worn in any way, it must be
immediately removed from service until repaired by an authorized service center. Repair may require spe-
cialized equipment and knowledge, so it must only be carried out by an authorized service center, using
original spare parts only.
-
Keep the jack clean and prevent foreign matter such as sand, grit and dirt from entering the system.
-
Clean all surfaces and maintain all labels and warnings in good condition and legible.
-
Check and maintain the ram oil level.
-
Check the ram every three months for any signs of rust or corrosion. Clean as needed and wipe with an
oiled cloth.
-
When not in use, always leave the saddle and ram all the way down.
-
Always store the jack in fully lowered position. This will protect critical areas from excessive corrosion.
-
Store the jack in a clean and dry place where it will not be exposed to corrosive vapours, abrasive dust or
any other harmful elements.
-
Annual inspection of the jack is recommended in an authorized service center to ensure the jack is in op-
timum condition.
Checking the oil level
1.
Lower the lifting arm completely.
2.
Remove the oil fill plug. The oil level should be at the bottom of the filling hole. If not, top off. Do not over-
fill. Always fill with new, clean hydraulic jack oil, type HL or HM with an ISO grade of kinematic viscosity of
30 cSt at 40 degree, or an Engler viscosity of 3 at 50 degree. Never use brake or transmission fluids, al-
cohol or regular motor oil.
3.
Replace the oil fill plug.
4.
Check jack operation.
5.
Purge air from the system if necessary.
Purging air from the system
1.
Place the handle into the socket.
2.
Pull the handle and turn it clockwise and whilst held in this position, pump the jack several times to bleed
the accumulated air from the system.
3.
Release the handle and it will automatically return back to the initial position.
6. TROUBLESHOOTING
Problem
Cause
Solution
Jack does not lift.
-
Release valve is open.
-
Low oil level.
-
Air in the system.
-
Load is above jack’s capacity.
-
Release and/or bypass valve
not working correctly.
-
Worn or defective packing.
-
Check that the release valve is closed by
the position of the handle. Release valve
may need cleaning.
-
Fill with suitable hydraulic oil and purge
air from the system.
-
Purge air from the system.
-
Use jack of suitable capacity.
-
Clean to remove dirt or foreign matter.
Replace hydraulic oil.
-
Replace the packing.
