6-34 4203781 First Edition
HYDRAULICS
6
!
WARNING
4. Install suitable blocking device or tool in left front
cutting unit motor, preventing left front cutting unit
motor from turning.
Figure 6-26
5. Open flow meter valve (1) completely.
Figure 6-27: Front Cutting Unit Motors Test—Left
Cutting Unit Motor Blocked
NOTE
Verify engine rpm is within specification (2800 rpm ± 50)
to ensure accurate hydraulic test results.
6. Start engine and run at full throttle (2800 rpm ± 50).
7. Use the flow meter to warm the hydraulic oil. Turn the
flow meter valve (1) until a reading of 1500 psi (103
bar) or one half of the relief valve rating is reached.
Warm oil to 120–150° F (49–65° C); open valve fully
after operating temperature is reached.
8. Enable front mower deck switch and engage PTO
switch.
9. Slowly close flow meter valve (1) until pressure
reaches 2250 psi (155 bar). Read and record the
front cutting unit left motor loaded flow.
10. Open flow meter valve (1), disengage switches, and
stop engine.
Safely block cutting unit from rotating using a
suitable device or tool. Failure to follow
appropriate safety precaution may result in death
or serious injury.
TN1363
1
TN2240
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