HYDRAULICS
673831-Rev A 6-33
6
6. Open flow meter valve (1) completely.
Figure 6-26: Front Reel Motors Test—Right Front
Reel Motor Blocked
Verify engine rpm is within specification (3000 rpm ± 50)
to ensure accurate hydraulic test results.
7. Start engine and run at full throttle (3000 rpm ± 50).
8. Use the flow meter to warm the hydraulic oil. Turn the
flow meter valve (1) until a reading of 1100 psi
(75 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.
9. Engage the mow switch, engage and release the
lift/lower joystick to the lower position twice, and
operate the reels.
10. Slowly close flow meter valve (1) until a pressure of
1650 psi (114 bar) or 75% of the relief valve rating is
reached. Read and record the right front reel motor
loaded flow.
11. Open flow meter valve, disengage mow switch, and
stop engine.
12. Calculate right front reel motor leakage.
(Step 10 of front reel valve test – Step 10 / Step 10 of
front reel valve test x 100 = Leak Percentage)
Is right front reel motor leakage 10% or less?
YES The right front reel motor is good. Proceed to
step 13.
NO Proceed to next question.
Is right front reel motor leakage 11% to 20%?
YES The right front reel motor is marginal.
Additional testing is required. Proceed to
step 13.
NO Proceed to next question.
Is right front reel motor leakage 21% or more?
YES Repair or replace right front reel motor. See
“Reel Drive Motor” on page 8-24, then
proceed to step 13.
13. Remove blocking device or tool from right front reel
motor.
14. Install suitable blocking device or tool in center
cutting unit, preventing center reel motor from
turning.
15. Open flow meter valve completely.
Figure 6-27: Front Reel Motors Test—Center Reel
Motor Blocked
Verify engine rpm is within specification (3000 rpm ± 50)
to ensure accurate hydraulic test results.
16. Start engine and run at full throttle (3000 rpm ± 50).
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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