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Groundsmaster 3505--DHydraulic System Page 4 -- 30
Piston Pump (P3) Flow and Traction Relief Pressure Test (Using Tester with Pressure
Gauges and Flow Meter)
Working Pressure
Low Pressure
Return or Suction
Flow
M4
M5
BI--PASS
VALVE
P3
PISTON PUMP
LOWER
PORT
UPPER
PORT
TO GEAR PUMP SUCTION
100 to 150 psi
FORWARD
TRACTION WHEEL MOTORS
3000 psi
THROUGH CASE DRAIN
(HYDROSTAT)
TRACTION
RELIEF
FROM HYDRAULIC
MANIFOLD (CHARGE) PORT
TESTER
HYDRAULIC
CHARGE
RELIEF