HYDRAULICS
4252490-Rev A 6-37
6
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Before performing this test, perform reel valve unit
test, leaving flow meter connected as outlined.
3. Install suitable blocking device or tool in right cutting
unit, preventing the reel motor from turning.
4. Block each side of rear wheels using suitable wheel
blocks.
5. Bypass seat switch and release park brake.
Figure 6-31
6. Open flow meter valve (1) completely.
Figure 6-32: Reel Motors Test—Right Reel Motor
Blocked
NOTE
Verify engine rpm is within specification (3400 rpm ± 50)
to ensure accurate hydraulic test results.
7. Start engine and run at full throttle (3400 rpm ± 50).
8. Use the flow meter to warm the hydraulic oil. Turn
flow meter valve until a reading of 1500 psi (103 bar)
or 50% of the relief valve rating is reached. Warm oil
to 120–150° F (49–65° C); open valve fully after
operating temperature is reached.
9. Engage mow switch.
10. Slowly close flow meter valve until pressure reaches
2200 psi (152 bar) or 75% of the relief valve rating is
reached. Read and record the right reel motor loaded
flow.
11. Open flow meter valve, disengage mow switch, and
stop engine.
12. Calculate right reel motor leakage.
(Step 10 of reel valve unit test – Step 10 / Step 10 of
reel valve unit test x 100 = Leak Percentage)
Is right reel motor leakage 10% or less?
YES The right reel motor is good. Proceed to
step 13.
NO Proceed to next question.
Is right reel motor leakage 11–20%?
YES The right reel motor is marginal. Additional
testing is required. Proceed to step 13.
NO Proceed to next question.
Is right reel motor leakage 21% or more?
YES Repair or replace right reel motor. See “Reel
Motor” on page 8-28, then proceed to
step 13.
13. Remove blocking device or tool from right reel motor.
!
WARNING
14. Install suitable blocking device or tool in left cutting
unit, preventing left reel motor from turning.
15. Open flow meter valve completely.
TN1363
1
TN3097
Safely block cutting unit from rotating using a
suitable device or tool. Failure to follow
appropriate safety precautions may result in
death or serious injury.
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