TM 5-3805-281-24-1
Tests
PILOT PUMP FLOW TEST
SPECIFICATIONS
50 5C (120 10F)
Hydraulic Oil Temperature
2000 10 rpm
Engine Speed
Work Mode Selector Position
Dig Mode
E Mode Switch Position
Off
HP Mode Switch Position
Off
Auto-Idle Switch Position
Off
Pilot Pump Flow Rate
25.0 L/Min (6.6 gpm) minimum
flow at 3925 kPa (39 bar) (570
psi)
SERVICE EQUIPMENT AND TOOLS
Flow Meter
JT05801 Clamp-On Electronic Tachometer
JT05800 Digital Thermometer
Test will determine the condition of pilot pump. The pump
is driven at engine speed. Inspect pilot filter and suction
screen for indications of hydraulic system problems.
1. Stop the engine.
9025
25
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2. Loosen vent plug (K) to release the air pressure in
hydraulic oil tank.
K--Vent Plug
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