Textron JACOBSEN R-311 69166, Техническое руководство по ремонту

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5-44 4203781 First Edition
HYDROSTATIC POWER TRAIN
5
Left Rear Wheel Motor Test
28. Open flow meter valve completely before starting
engine.
Figure 5-40: Left Rear Wheel Motor Test—Blocking
Disk at Right Rear Wheel Motor, All Wheels
Restrained
NOTE
Verify engine rpm is within specification (2800 rpm ± 50)
to ensure accurate hydraulic test results.
29. Start engine, release park brake, and run at full
throttle (2800 rpm ± 50).
30. Adjust flow lock tool (7) to allow pump to produce 15
gpm (57 lpm) in the forward direction.
31. Use the flow meter to warm the hydraulic oil. Turn the
flow meter valve until a reading of 1750 psi (121 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.
32. After warming the hydraulic oil, verify flow lock tool is
adjusted to allow pump to produce 15 gpm (57 lpm)
in the forward direction.
33. Engage 4WD switch in the forward position.
34. Slowly close flow meter valve until pressure reaches
2625 psi (181 bar). Read and record loaded flow.
35. Open flow meter valve, stop engine, and set park
brake. Return flow lock tool back to neutral position.
36. Calculate left rear wheel motor leakage.
(Step 24 – Step 34 / Step 24 x 100 = Leak
Percentage)
Is left rear wheel motor leakage 10% or less?
YES The left rear wheel motor is good. Proceed to
step 37.
NO Proceed to next question.
Is left rear wheel motor leakage 11% to 20%?
YES The left rear wheel motor is marginal. Repair
or replace left rear wheel motor as
necessary. Continue to step 37.
NO Proceed to next question.
Is left rear wheel motor leakage 21% or more?
YES Repair or replace left rear wheel motor. (See
“Rear Wheel Motor” on page 5-64.)
37. Remove blocking disk from “R1” location (9).
TN2343