Kioti KL155 Manual page 51

10-6 KL155
PROBLEM POSSIBLE CAUSE
Control lever linkage binding.
Control valve spool(s)
Control valve spool centering is broken.
will not return to
centered position.
Control valve spool binding in valve body
spool bore.
Loose hydraulic connection.
Defective hydraulic hose, tubeline, adapter
fitting or adapter fitting o-ring.
External hydraulic fluid
Control valve o-rings defective.
leakage.
Control valve spool or body damaged or worn.
Cylinder rod packing set leakage.
Cold hydraulic fluid.
Engine R.P.M. too slow.
Hydraulic pump capacity
inadequate.
Low hydraulic fluid supply.
Hydraulic hose restriction.
CORRECTION
Determine origin of binding and repair.
Replace centering spring.
Disassemble valve for inspection and repair.
Tighten loose connections.
Check for origin of oil leak and replace
defective part.
Replace defective o-rings.
Replace control valve.
Check cylinders for leakage. Repair as
needed.
Allow hydraulic fluid to warm up to operating
temperature.
Increase engine R.P.M.
Refer to Tractor Operator's Manual for service
recommendations.
Check for evidence of restriction in hydraulic
hoses.