5-42 4203780 First Edition
HYDROSTATIC POWER TRAIN
5
Front Axle Motor Test
See Figures 5-36 through 5-43.
IMPORTANT
• This test works together with the 2WD traction
system test to isolate a problem within the
hydrostatic power train.
!
WARNING
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Before performing this test, perform traction system
test leaving flow meter, flow lock tool, blocking disks,
and wheel restraints connected as outlined. (See
“Traction System Test” on page 5-37.)
Figure 5-36
3. Remove the blocking disks from locations (1 and 2).
4. Swap hoses 3 and 4 back to original position after
performing reverse relief test.
IMPORTANT
• If performing this test after performing the
traction system test, and the test results have
proven the pump and front axle motor to be
good, proceed to step 15.
• If performing this test to determine which
component in system is at fault (front axle motor,
secondary 4WD shuttle valve, right rear wheel
motor, left rear wheel motor, or 4WD reverse
solenoid valve) continue to step 5.
5. Set park brake.
6. Bypass seat switch.
Figure 5-37: Front Axle Motor Test—Blocking Disks
at 4WD Valve, All Wheels Restrained
NOTE
Verify engine rpm is within specification (2800 rpm ± 50)
to ensure accurate hydraulic test results.
7. Start engine, release park brake, and run at full
throttle (2800 rpm ± 50).
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)
• -12 ORFS and -10 ORFS Blocking Disks
• Flow Lock Tool
• Wheel Restraints
4
TN1357
3
1
2
TN2089
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