Toro Groundsmaster 4300-D Service Manual page 125

Test Procedure
Groundsmaster ® 4300-D
16226SL Rev C
1. Ensure that the hydraulic fluid is at normal operating temperature by
operating the machine for at least 10 minutes.
2. Determine which of the deck motor is suspect and begin testing with that
motor.
3. Park the machine on a level surface with the PTO switch off, lower the cutting
decks, shut off the engine, mow speed limiter is in the M
set the parking brake.
Before opening the hydraulic system, operate all the hydraulic
controls to release system pressure and avoid injury from the
pressurized hydraulic fluid; refer to
Hydraulic System (page
4. Read all Warning, Cautions, and precautions listed at the beginning of this
section.
g189654
1. Return hose
Note: The deck motors are connected in series. If a damaged deck motor
is not obvious (based on quality of cut issues) you may have to test all 3
motors in the circuit. If testing all cutting deck motors, start with the first
motor in the series (front left).
5. For the deck motor that is to be tested, clean the junction of the motor case
drain hose (small diameter hose) where it is connected to the traction unit
bulkhead (not at the motor)
6. Disconnect the case drain hose and put a steel cap on the fitting at the
traction unit. Leave the case drain hose from the motor open and place the
open end of the disconnected hose into a drain pan.
Ensure that the fluid flow indicator arrow on the flow gauge is
showing that the fluid will flow from the deck motor, through the
tester, and into the return hose.
CAUTION
Releasing Pressure from the
4–6).
Figure 64
2. Case drain hose
(Figure 64).
IMPORTANT
Page 4–63 Hydraulic System: Testing the Hydraulic System
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