Load Drops with Control Valve in Neutral Position
Leaking or broken oil lines from control valve to cylinder.
Check for leaks. Tighten or replace lines. Examine mating surfaces on couplers for irregularities.
Oil leaking past cylinder packings or O-rings.
Replace worn parts. If wear is caused by contamination, clean hydraulic system and determine the contamination source.
Oil leaking past control valve or relief valves.
Clean or replace valves. Wear may be caused by contamination. Clean hydraulic system and determine the contamination source.
Oil leaking past load holding valve.
Check for proper adjustment. Remove and replace cartridge with spare. (Support boom before removing cartridge.) Do not attempt to repair.
Control lever not centering when released.
Check linkage for binding. Make sure valve is properly adjusted and has no broken or binding parts.