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Ammeter Shows Excessive Charge.
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TM-55-4920-341-14 Test Stand Hydraulic System Gasoline Engine Driven Model D - 5B Manual
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Radio Interference Suppression.
SECTION III (Con't.)
3-23 Hydraulic Pump Fails to Deliver Sufficient Pressure.
Possible remedy
Probable cause
Defective high pressure relief valve---- Repair or replace high
pressure relief valve.
Fluid pressure gage defective ----------- Replace fluid pressure
gage
Compensator control defective ----------- Repair or replace
compensator control.
Hydraulic pump defective ---------------- Replace the pump.
Loss of prime --------------------------- Fill prime port on
pump.
3-24 Hydraulic Pump Fails to Deliver Sufficient Volume.
Possible remedy
Probable cause
Fluid volume control defective ---------- Repair fluid volume
control.
Air in the hydraulic system ------------- Bleed air from the
system.
Engine speed too low-------------------- Check engine with hand
speed indicator, Re-
place tachometer if
defective.
Fluid flow indicator defective ---------- Replace or repair
fluid flow indicator.
High pressure filter clogged ------------ Replace high pressure
filter.
Fluid bypass valve leaking -------------- valve fluid bypass
3-25
Hydraulic System Pressure Too High.
Probable cause
Possible remedy
High pressure filter clogged ------------ Replace high pressure
High pressure relief valve defective---- Repair or replace high
pressure relief valve.
Compensator control defective ----------- Repair or replace
compensator control.
Fluid pressure gage defective ----------- Repair or replace
fluid pressure gage.
3-26
Hydraulic Fluid Temperature Too High.
Probable cause
Possible remedy
Fluid temperature gage defective -------- Replace fluid temper-
ature gage.
-56-

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