Greensmaster 3320/3420Hydraulic System Page 5 -- 34
Wheel Motor Efficiency Test (Using Te ster with Flowmeter and Pressure Gauge)
ENGINE
C
3000
PSI
10.3
RIGHT
AB
AB
1.44
110 -- 150
PSI
G1
G2
A
B
BA
TOP
PORT
BOTTOM
PORT
BACK
PORT
C1
HYDROSTAT
BYPASS
VALVE
1.9GPM
70to
MOW=6.7GPMAT3.8MPH
TRANSPORT=17.5GPMAT10MPH
PSI
OPTIONAL3WD
FRONT
PORT
10.3
20.6
3000
PSI
100
MOTOR
LEFT
MOTOR
POWERSTEERINGAND
LIFTCONTROLVALVES
FROM
TESTER
CAP
CAP
UPPER
PUMP
PUMP FROM GREENSMASTER 3320
PISTON
FITTING
PUMP FROM GREENSMASTER 3420
FRONT
GEAR
.33
PUMP
HYDRAULIC
RESERVOIR
FROM
STEERINGVALVE
TOPOWER
HYDRAULIC
RESERVOIR
TO
UPPER
PUMP
PISTON
FITTING
FRONT
NOTE: Over a period of time, a wheel motor can wear
internally.A wornmotormay by--passoil toitscase drain
causing the motor to be less efficient. Eventually,
enough oil loss will cause the wheel m otor to stall under
heavyloadconditions. Continued operationwith aworn,
inefficient motor can generate excessive heat, cause
damage to seals and other components in the hydraulic
system and affect overall machine performance.
Procedure for Wheel Motor Efficiency
Test:
1. Make sure hydraulic oil is at normal operating tem-
peraturebyoperatingthemachinefor approximatelyten
(10) minutes. Make sure the hydraulic tank is full.
2. Parkmachineonalevelsurfacewiththecuttingunits
lowered and off. Make sure engine is off. Make sure the
hydraulic tank is full.
