6-44 4203780 First Edition
HYDRAULICS
6
Figure 6-41: Right Wing Cutting Unit Motors Test—
Outside 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 wing 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
right wing cutting unit outside motor loaded flow.
10. Open flow meter valve (1), disengage switches, and
stop engine.
11. Calculate right wing cutting unit outside motor
leakage.
(Step 9 of right wing cutting unit deck valve test –
Step 9 / Step 9 of right wing cutting unit deck valve
test x 100 = Leak Percentage)
Is right wing cutting unit outside motor leakage
10% or less?
YES The right wing cutting unit outside motor is
good. Proceed to step 12.
NO Proceed to next question.
Is right wing cutting unit outside motor leakage
11% to 20%?
YES The right wing cutting unit outside motor is
marginal. Additional testing is required.
Proceed to step 12.
NO Proceed to next question.
Is right wing cutting unit outside motor leakage
21% or more?
YES Repair or replace right wing cutting unit
outside motor. (See “Deck Motors” on
page 6-61.) Then proceed to step 12.
12. Remove device or tool from right wing cutting unit
outside motor.
13. Bypass seat switch and set park brake.
!
WARNING
14. Install suitable blocking device or tool in right wing
cutting unit inside motor, preventing right wing cutting
unit inside motor from turning.
15. Open flow meter valve (1) completely.
TN2077
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.
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