Wheel Motor Efficiency Test - Toro Greensmaster TriFlex 3320/3420 Service Manual

Wheel Motor Efficiency Test (Using Tester with Flowmeter and Pressure Gauge)
TO POWER
STEERING VALVE
TO
HYDRAULIC
RESERVOIR
1.44
.33
GEAR
PUMP
FROM
HYDRAULIC
TRANSPORT = 17.5 GPM AT 10 MPH
RESERVOIR
PUMP FROM GREENSMASTER 3320
UPPER
FITTING
FRONT
NOTE: Over a period of time, a wheel motor can wear
internally. A worn motor may by--pass oil to its case drain
causing the motor to be less efficient. Eventually,
enough oil loss will cause the wheel motor to stall under
heavy load conditions. Continued operation with a worn,
inefficient motor can generate excessive heat, cause
damage to seals and other components in the hydraulic
system and affect overall machine performance.
Hydraulic System
FROM
POWER STEERING AND
LIFT CONTROL VALVES
C
3000
PSI
110 -- 150
PSI
3000
PSI
MOW = 6.7 GPM AT 3.8 MPH
PISTON
PUMP
HYDROSTAT
A
PORT
70 to
G2
100
PSI
1.9 GPM
G1
B
C1
BOTTOM
PORT
BYPASS
VALVE
PUMP FROM GREENSMASTER 3420
UPPER
FITTING
FRONT
Procedure for Wheel Motor Efficiency Test:
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately ten
(10) minutes. Make sure the hydraulic tank is full.
2. Park machine on a level surface with the cutting units
lowered and off. Make sure engine is off. Make sure the
hydraulic tank is full.
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TESTER
TOP
CAP
10.3
ENGINE
CAP
20.6
B A
OPTIONAL 3WD
Greensmaster 3320/3420
10.3
PISTON
PUMP