Check Oil Level; Troubleshooting - KRAFTWERK 38105 Manual De Utilización Y Mantenimiento

MAINTENANCE
Monthly maintenance is recommended. Lubrication is very important for jacks as they support heavy loads. Any
restriction due to dirt, rust etc. can cause either slow movement or cause extremely rapid jerks, damaging the internal
components. The following steps are designed to keep the jack well lubricated:
1. Lubricate the ram, linkages, saddle and pump mechanism with light oil. Grease wheels bearings and axles.
2. Visually inspect for cracked welds, bent, loose, missing parts or hydraulic oil leaks.
3. If jack is subjected to abnormal load or shock, remove from service and have it examined by a customer service
representative prior to use.
4. Clean all surfaces and maintain all labels and warnings.
5. Check and maintain the ram oil level.
6. Check ram every 3 months for any sign of rust or corrosion. Clean as needed and wipe with an oil cloth.
Always store your jack in the fully lowered position. This will help to protect critical areas from excessive
corrosion. Do not use brake or transmission fluids or regular motor oil as they can damage the seals. Always purchase
and use products labeled Hydraulic Jack Oil.

CHECK OIL LEVEL

1. Turn release valve counterclockwise to allow ram to fully retract. It may be necessay to apply force to the saddle for
lowering.
2. With the jack in the level position, remove the oil fill plug. The oil should be level with the bottom of fill hole. If not,
top off.
Do not overfill. Always fill with new, clean hydraulic jack oil.
3. Replace fill plug.
4. Check jack operation.
5. Purge air from system if required.
TROUBLE SHOOTING
System air purge:
1. Turn release valve counterclockwise one full turn to open.
2. Pump handle several full strokes.
3. Turn release valve clockwise to close valve.
Problem
Jack will not lift to full height
Jack will not hold load constantly
Lift arm will not lower
Jack feels spongy when lifting
Possible cause
Low oil level
Release valve is not closing
Hydraulic jack oil contaminated
Pump valves not sealing
Cylinder ram binding
Cylinder ram binding
Parts worn
Internal damage
Broken return spring or unhooked
Lift arm linkage bent or binding
Air in hydraulic system
Action
Check oil level
Call customer service
Call customer service
System air purge procedure
(see above)
7