73
TROUBLE PROBABLE CAUSE REMEDY
TROUBLE SHOOTING
Hitch lifts slowly
(Not lifting with full speed)
Oil level in reservoir is low
Fall in pump efficiency
Suction strainer! Suction line filter
clogged
System overloaded
Spring relief valve has taken
permanent set
Spring compensator damaged
Spring regulator valve damaged
Regulator piston ‘O’ ring damaged or
not fitted properly
Compensator spool stuck in fully open
position.
Thermal relief valve is leaky.
In draft control draft control feedback
link adjustment disturbed.
Load movements restricted
Hydraulic rock shaft, cam, lift arms,
improperly assembled
Improperly set three point Linkages
(A)
Piston oil seal or piston relief valve
leaking
Valve or cylinder head ‘O’ ring leaking
Isolator valve leaky
Spigot ‘O’ ring leaky
(B)
Valve parts leaking due to wear
a) Main control valve – damaged or worn
surface
b) Check valve – damaged ball surface,
damaged ball sleeve, damaged valve
seat “O” ring
Fill to correct level
Replace or repair the Pump
Clean strainer! replace filter
Reduce load
Replace the spring
Replace the spring
Replace the spring
Replace ‘O’ ring
Clean or replace if required
Replace
Adjust the draft control feedback
link, adjusting link length
Remove restriction
Check & assemble properly
Adjust
Fit new seals or relief valve
Fit new ‘O’ ring.
Change ‘O’ ring
Replace
Check spool fit, replace
components if required.
Check ball surface, ball seat,
damaged valve seat “O” ring &
replace if required.
Implement does not reach
maximum height
Lift coming down when
engine is stopped jerking
when engine is running
Hy-tec Hydraulic
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