Textron Jacobsen AR-5 Technical/Repair Manual

HYDROSTATIC POWER TRAIN
4181383 First Edition 5-21
5
!
WARNING
IMPORTANT
It is important to lift the rear of machine and support
with stands because if there is any leakage in the
front wheel motor the machine will move.
7. Lift rear of machine and support with stands.
NOTE
Verify engine rpm is within specification (2850 rpm ± 50)
to ensure accurate hydraulic test results.
8. Start engine, release brake, and run at full throttle
(2850 rpm ± 50).
Figure 5-20
9. Adjust flow lock tool (3) to allow pump to produce 15
gpm (57 lpm) in the forward direction.
10. Use the flow meter to warm the hydraulic oil. Turn the
flow meter valve until a reading of 1800 psi (124 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.
11. After warming the hydraulic oil, verify flow lock tool is
adjusted to allow pump to produce 15 gpm (57 lpm)
in the forward direction.
12. Slowly close flow meter valve until pressure reaches
2700 psi (186 bar). Read and record loaded flow.
13. Stop engine, apply brake, and return flow lock tool
back to neutral position.
14. Calculate left front wheel motor leakage.
(Step 10 of previous test – Step 12 / Step 10 of
previous test x 100 = Leak Percentage)
Is left front wheel motor leakage 10% or less?
YES The left front wheel motor is good. Proceed
to step 15.
NO Proceed to next question.
Is left front wheel motor leakage 11% to 20%?
YES The left front wheel motor is marginal.
Additional testing is required. Continue to
step 15.
NO Proceed to next question.
Is left front wheel motor leakage 21% or more?
YES Repair or replace left front wheel motor. (See
“Front Wheel Motor” on page 5-34.)
15. Remove wheel restraint from left front wheel.
!
WARNING
IMPORTANT
It is important to lift and support the front of machine
or the machine will move.
16. Lift the front of machine and support with stands.
Figure 5-21
17. Install blocking disk at location (4) of 4WD valve.
18. Open flow meter valve completely before starting
engine.
NOTE
Verify engine rpm is within specification (2850 rpm ± 50)
to ensure accurate hydraulic test results.
Prevent personal injury. Use properly rated lifting
devices. Always be sure load is balanced before
lifting.
Support the machine properly using jack stands.
3
TN1705
Prevent personal injury. Use properly rated lifting
devices. Always be sure load is balanced before
lifting.
Support the machine properly using jack stands.
4
TN1401

Textron Jacobsen AR-5 Specifications

General

Brand	Textron
Model	Jacobsen AR-5
Category	Lawn Mower
Language	English