6-34 673831-Rev A
HYDRAULICS
6
17. Use the flow meter to warm the hydraulic oil. Turn the
flow meter valve 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.
18. Engage the mow switch, engage and release the
lift/lower joystick to the lower position twice, and
operate the reels.
19. Slowly close flow meter valve until a pressure of
1650 psi (114 bar) or 75% of the relief valve rating is
reached. Read and record the center reel motor
loaded flow.
20. Open flow meter valve, disengage mow switch, and
stop engine.
21. Calculate center reel motor leakage.
(Step 10 – Step 19 / Step 10 x 100 = Leak
Percentage)
Is center reel motor leakage 10% or less?
YES The center reel motor is good. Proceed to
step 22.
NO Proceed to next question.
Is center reel motor leakage 11% to 20%?
YES The center reel motor is marginal. Additional
testing is required. Proceed to step 22.
NO Proceed to next question.
Is center reel motor leakage 21% or more?
YES Repair or replace center reel motor. See
“Reel Drive Motor” on page 8-24, then
proceed to step 22.
22. Remove blocking device or tool from center cutting
unit.
23. Install suitable blocking device or tool in left front
cutting unit, preventing left front reel motor from
turning.
24. Open flow meter valve completely.
Figure 6-28: Front Motors Test—Left Front Reel
Motor Blocked
Verify engine rpm is within specification (3000 rpm ± 50)
to ensure accurate hydraulic test results.
25. Start engine and run at full throttle (3000 rpm ± 50).
26. Use the flow meter to warm the hydraulic oil. Turn the
flow meter valve 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.
27. Engage the mow switch, engage and release the
lift/lower joystick to the lower position twice, and
operate the reels.
28. Slowly close flow meter valve until a pressure of
1650 psi (114 bar) or 75% of the relief valve rating is
reached. Read and record the left front reel motor
loaded flow.
29. Open flow meter valve, disengage mow switch, and
stop engine.
30. Calculate left front reel motor leakage.
(Step 19 – Step 28 / Step 19 x 100 = Leak
Percentage)
Is left front reel motor leakage 10% or less?
YES The left front reel motor is good. Proceed to
step 31.
NO Proceed to next question.
Is left front reel motor leakage 11% to 20%?
YES The left front reel motor is marginal.
Determine component(s) with greatest
leakage and repair or replace as necessary,
then proceed to step 31.
NO Proceed to next question.
Is left front reel motor leakage 21% or more?
YES Repair or replace left front reel motor. See
“Reel Drive Motor” on page 8-24, then
proceed to step 31.
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.
To Next Page
Loading...
Need help?
General
