HYDROSTATIC POWER TRAIN
4203780 First Edition 5-37
5
Traction System Test
See Figures 5-27 through 5-32.
IMPORTANT
• This test works together with the wheel motors
test to isolate a problem within the hydrostatic
power train.
• Performing this test will isolate the traction pump
and front axle motor from the rest of the
hydrostatic system. Secondly, this test will
isolate the secondary 4WD shuttle valve, right
rear wheel motor, left rear wheel motor, and 4WD
reverse solenoid valve from the rest of the
hydrostatic system.
!
WARNING
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Remove the seat and seat platform. (See “Seat and
Seat Platform” on page 9-13.)
Figure 5-27
3. Install wheel restraint (1) to all four wheels.
4. Disconnect traction pump control rod from pump
control arm.
Figure 5-28
5. Install flow lock tool (2) and secure to pump control
arm.
6. Close tow valve completely by turning clockwise.
The hydraulic system is under pressure, and the
oil will be hot.
• Always relieve pressure in the hydraulic
system before performing service.
• Failure to follow appropriate safety
precautions may result in death or serious
injury.
Required Tools and Materials
• Flow Meter
• -12 ORFS Test Hose 4000 psi (276 bar)
• -10 ORFS Blocking Disks
• Flow Lock Tool
• Wheel Restraints
TN1329
1
2
TN1364
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