HYDRAULICS
4203780 First Edition 6-41
6
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Before performing this test, perform right wing cutting
unit pump test, leaving flow meter connected as
outlined.
Figure 6-36
3. Install blocking disk at fitting (1) on right wing cutting
unit outside motor, blocking oil flow from entering
right wing cutting unit outside motor.
Figure 6-37
4. Open flow meter valve (2) completely.
Figure 6-38: Right Wing Cutting Unit Deck Valve
Test—Blocking Disk at Outside Cutting Unit Motor
5. Bypass seat switch and set park brake.
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 (2) 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 wing mower deck switch and engage PTO
switch.
9. Slowly close flow meter valve (2) until pressure
reaches 2250 psi (155 bar). Read and record the
right wing cutting unit pump loaded flow.
10. Open flow meter valve (2), disengage switches, and
stop engine.
TN2062
1
TN1363
2
TN2079
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