KRAFTWERK 38101 Manuel D'utilisation page 5

To bleed the hydraulic system:
• Close the release valve by turning the jack handle clockwise.
• Insert handle in sleeve and pump jack up to full height.
To release air from the hydraulic system:
• Open the release valve by turning the jack handle counterclockwise.
• Remove the oil filler plug from the cylinder.
• Rapidly pump jack handle through several full strokes.
• Replace the oil filler plug into the cylinder again and jack is ready to use.
Problem
Jack will not lift to full height
Jack will not hold load
constantly
Lift arm will not lower
Jack feels spongy when lifting
Any hydraulic jack found to be damaged in any way, is found to be worn or operates abnormally, believed to have
subjected to an abnormal load, shall be REMOVED FROM SERVICE UNTIL FULL REPAIRED. Owners and/or operators
should be aware that repair of the equipment requires specialized knowledge and facilities. Only factory authorized
parts, labels and decals shall be used on this equipment. Contact customer service department.
TROUBLE SHOOTING
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
REPARATIONS
Action
Check oil level
Call customer service
Call customer service
System air purge procedure
(see above)
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