TM 5-3825-226-24
PROBLEM
PROBABLE CAUSE
RECOMMENDED CORRECTIVE ACTION
Machine steers slowly in both directions.
1.
Valve spool does not move enough.
2.
Relief valve setting is too low.
3.
Failure or damage of pilot valve or flow control
valve.
4.
Pump output is low.
5.
Failure of a piston seal in the steering cylinders.
a.
Check valve spool, repair or replace as
necessary.
b.
Check relief valve setting, adjust as
necessary.
c.
Replace pilot valve/flow control valve.
d.
Check
pump,
repair
or
replace
as
necessary.
e.
Check
piston
seals
in
the
steering
cylinders, repair or replace as necessary.
Machine turns slowly in one direction.
Valve spool does not move enough in one direction
(spool not centered).
Check spool and adjust or replace as
necessary.
Steering is not smooth (jerky).
1.
Air in the hydraulic oil.
2.
Relief valve setting is low.
a.
Bleed the hydraulic oil lines.
b.
Check relief valve, adjust or replace as
necessary.
PROBLEM
PROBABLE CAUSE
RECOMMENDED CORRECTIVE ACTION
Machine turns slowly, even when the steering wheel
is in NEUTRAL.
1.
Mechanical linkage for steering does not move
freely.
2.
Valve spool does not move freely (is stuck).
3.
Valve spool in control valve is not adjusted
correctly (not centered).
a.
Check linkage, repair or replace as
necessary.
b.
Check
spool,
adjust
or
replace
as
necessary.
c.
Check spool adjustment, repair or replace
as necessary.
The oil pressure is low.
1.
The relief valve setting is low.
2.
The pump has too much wear.
3.
The failure of a seal in the system.
a.
Check relief valve setting, adjust as
necessary.
b.
Check
pump,
repair
or
replace
as
necessary.
c.
Check seals in system, replace as
necessary.
The oil temperature is too high.
1.
The viscosity of the oil' is wrong.
2.
The relief valve setting is too low.
3.
Loose connection of the oil line on the inlet side
of pump.
4.
The pump has too much wear.
a.
Replace with oil of the proper viscosity.
b.
Adjust relief valve as necessary.
c.
Secure connection.
d.
Check
pump,
repair
or
replace
as
necessary.
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