Honda FL5540KO Operator's Manual page 38

TROUBLE SHOOTING
FOAMING OF OIL IN SYSTEM
Low oil level — Fill reservoir. Look for leaks.
Water in oil — Drain and replace oil.
Wrong kind of oil being use — See
specifications on proper oil.
Air leak in line from reservoir to pump —
Tighten or replace suction line.
Kink in oil suction line — Replace oil line.
Worn seal around pump shaft — Clean
sealing area and replace seal. Check oil for
contamination.
PUMP MAKES NOISE
Low oil level — Fill reservoir. Check system
for leaks.
Oil viscosity too high — See specifications
on proper oil.
Cold oil — Allow oil to warm up before
operating.
Suction line plugged or pinched — Clean or
replace line between reservoir and pump.
Reservoir air vent plugged — Remove vent
plug, flush, and clean air vent.
Air in oil — Tighten or replace suction line.
Check system for leaks. Check pump shaft
seal.
Worn or scored pump bearings or shafts
— Replace pump.
PUMP LEAKS OIL
Damaged seal around pump shaft —
Replace seal.
42
LOAD DROPS WITH CONTROL VALVE IN
NEUTRAL POSITION
Leaking or broken oil lines from control
valves to cylinder — Check for leaks.
Tighten or replace lines.
Oil leaking past cylinder packing or
"O" rings — Replace worn parts. If wear is
caused by contamination, clean hydraulic
system and determine source of dirt.
Oil leaking past control valve — Clean or
replace valve. Wear may be caused by
contamination. Clean system and determine
source of dirt.
CONTROL VALVE STICKS OR WORKS HARD
Valve broken or scored internally —
Replace valve.
CONTROL VALVE LEAKS OIL
Worn or damaged "O" rings — Replace "O"
rings. If contamination has caused "O" rings
to wear, clean system and look for source.
Broken valve parts — Replace parts or
valve.
CYLINDER LEAKS OIL
Damaged cylinder bowl — Replace
cylinder. Correct cause of damage.
Rod seal leaking — Replace seal. If
contamination caused seal to wear. look for
source. Wear may be caused by external as
well as internal contaminants. Check piston
rod for scratches or misalignment.
Loose parts — Tighten parts.
Piston rod damaged — Check rod for nicks
or scratches that could cause seal damage or
allow oil leakage. Replace defective cylinder.