TM 5-3805-280-24-1
Tests
PILOT PUMP FLOW TEST
SPECIFICATIONS
50 6C (120 10F)
Oil Temperature
Engine in Standard Mode Speed
2000 rpm
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) at 3925 kPa
(39 bar) (570 psi) and 2000 rpm
SERVICE EQUIPMENT AND TOOLS
Flow Meter
JT05800 Digital Thermometer
JT05801 Clamp-On Electronic Tachometer
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.
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121
1. Stop the engine.
Loosen vent plug (K) to release the air pressure in
hydraulic oil tank.
K--Vent Plug
Continued on next page
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