Table 2-1. Troubleshooting Chart - Continued
Malfunction
Probable cause
Corrective action
f. Relief valve stuck open
f. As required, remove and disassemble the relief valve
(Emergency steering
hydrostat. Wash the valve in clean solvent. Return
hydraulic pump only)
the valve of its bore and check for any stickiness. A
gritty feeling on the valve periphery can be pol-
ished with crocus cloth. Do not remove excess ma-
terial, round off the edges of the bands or attempt
to polish the bore. Wash all parts and reassemble
the pump.
g. Vane(s) stuck in the
g. Disassemble the pump. Check for dirt or metal.
rotor slot(s)
26. (Model 2385) Hydrau-
System relief valve set
Use a pressure gauge to correctly adjust the relief
lic pump insuffi-
too low
valve.
cient pressure build
up
27. (Model 2385) Hyd-
a. Pump intake partially
a. Service the intake strainers. Check the fluid condition
raulic Pump making
blocked
end, if necessary, drain and flush the system. Refill
noise
with clean fluid.
b. Air leaks at the intake
b. Check the inlet connections and seal to determine
or shaft seal. (Oil
where air is being drawn in. Tighten any loose
in reservoir may be
connections and replace the seal if necessary. See
foamy)
that the fluid in the reservoir is above the intake pipe
opening.
c. (Model 2385) Hydraulic
c. Operate the pump at the recommended drive speed.
pump drive speed too
slow or too fast
d. Coupling misalignment
d. Check if the shaft seal, bearing or other parts have
been damaged. Replace any damaged parts. Re-
align the coupled shafts.
Section III. RADIO INTERFERENCE SUPPRESSION
2-5. General
Refer to TM 11-483 for definitions, purposes, source and
methods used to obtain radio suppression.
2-6. Replacement of Suppression Components
Refer to figure 2-1 and replace the radio interference
suppression components.
A-Voltage regulator
Figure 2-1. (1) Interference suppression components.
2-5
