Possible Problems And Solutions - Napa PROFESSIONAL LIFTING 520-6004 A Directives De Fonctionnement

MODEL 520-6004 A 4 Ton Replacement Crane Ram
MODEL 520-6008 A 8 Ton Replacement Crane Ram

POSSIBLE PROBLEMS AND SOLUTIONS

520-6004A & 520-6008A
The release valve is not closed.
Turn the valve clockwise tightly.
Low on oil. Refill the jack to the correct level of oil.
Pump seals and back-up ring is defective. Clean oil passages, replace
seals and renew oil. (Must be serviced by qualified service center)
The hydraulic system is filled with air. Open the release valve,
pump handle rapidly (4) full strokes to purge air, close release valve.
Return spring is broken or linkages binding.
Replace spring if broken. Grease pivot shaft, oil all lift arm linkages.
Discharge ball is not sealing hydraulic system and oil may be dirty.
Manually flush hydraulic system by raising and lowering lift arm by
hand. Open the release valve, as required to raise and lower the lift
arm. Manually raise and lower lift arm.
4
SOLUTIONS
Rev. 0/2/07