5-20 4181383 First Edition
HYDROSTATIC POWER TRAIN
5
Wheel Motors Test
See Figures 5-18 through 5-23.
IMPORTANT
• This test works together with the traction system
test to isolate a problem within the hydrostatic
power train.
• Performing this test will isolate the wheel motors
and 4wd valve from the rest of the hydrostatic
system. It will also isolate the system into right
and left circuits.
!
WARNING
1. Park the mower safely. (See “Park Mower Safely” on
page 1-5.)
2. Before performing this test, perform traction system
test leaving flow meter and flow lock tool connected
as outlined. (See “Traction System Test” on
page 5-16.)
3. (See Figure 5-16.) Remove the blocking disks from
locations (1 and 3).
4. Connect hoses back to flow meter as outlined in
traction system test. (See “Traction System Test” on
page 5-16.)
Figure 5-18
5. Install blocking disk at location (1), in front of front
axle, to block oil from right wheel motor.
IMPORTANT
• If performing this test after performing the
traction system test, and the test results have
proven the traction system to be good, proceed
to step 16.
• If performing this test to determine which
component in system is at fault (front wheel
motor, check valve, or rear wheel motor) continue
to step 6.
Figure 5-19
6. Install wheel restraint (2) to left front wheel.
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
1
TN1400
TN1329
2
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