HYDRAULICS
4203781 First Edition 6-45
6
Figure 6-42: Right Wing Cutting Unit Motors Test—
Inside Cutting Unit Motor Blocked
NOTE
Verify engine rpm is within specification (2800 rpm ± 50)
to ensure accurate hydraulic test results.
16. Start engine and run at full throttle (2800 rpm ± 50).
17. 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.
18. Enable wing mower deck switch and engage PTO
switch.
19. Slowly close flow meter valve (1) until pressure
reaches 2250 psi (155 bar). Read and record the
right wing cutting unit inside motor loaded flow.
20. Open flow meter valve (1), disengage switches, and
stop engine.
21. Calculate right wing cutting unit inside motor
leakage.
(Step 9 – Step 19 / Step 9 x 100 = Leak Percentage)
Is right wing cutting unit inside motor leakage
10% or less?
YES The right wing cutting unit inside motor is
good. Proceed to step 22.
NO Proceed to next question.
Is right wing cutting unit inside motor leakage
11% to 20%?
YES The right wing cutting unit inside motor is
marginal. Determine component(s) with
greatest leakage and repair or replace as
necessary.
NO Proceed to next question.
Is right wing cutting unit inside motor leakage
21% or more?
YES Repair or replace right wing cutting unit
inside motor. (See “Deck Motors” on
page 6-62.)
22. Remove device or tool from right wing cutting unit
inside motor.
23. Disconnect and remove test equipment. Install all
hoses and fittings as noted prior to removal.
24. Install and connect all components as noted prior to
test.
25. Check hydraulic oil level. Add oil as needed. (Refer to
“Safety, Operation, and Maintenance Manual” for
correct oil specifications.)
TN2253
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