Textron Jacobsen AR-5 Technical/Repair Manual

HYDRAULICS
4181383 First Edition 6-21
6
Field Test Procedures
Lift Cylinder Leakage Test
See Figures 6-13 and 6-14.
!
WARNING
1. Start engine. Operate hydraulic system until oil
temperature is at 120—150°F (49—65°C).
2. Raise cutting units.
3. Park the mower safely. (See “Park Mower Safely” on
page 1-5.)
4. Support all cutting unit lift arms.
.
Figure 6-13
NOTE
Figure 6-12 shows left rear lift arm cylinder. Procedure is
similar for right rear and front lift cylinders.
5. Disconnect hose (2) from lift cylinder rod end fitting
(1).
6. Install plug in hose (2).
7. Install cap on lift cylinder fitting (1).
8. Remove support from cutting unit lift arm being
tested.
After 15 minutes, does cutting unit drift down?
YES Cylinder is bypassing oil. Replace lift
cylinder. (See “Lift Cylinders” on page 6-49.)
NO Repeat the test for all of the lift cylinders. If
all cylinders pass test, the problem may be in
the lift valve. Proceed to step 9.
9. Support all cutting unit lift arms.
10. Connect hose (2) to lift cylinder fitting (1).
11. Start the engine and lower cutting units.
12. Stop the engine.
Figure 6-14
13. Remove the center floorboard.
IMPORTANT
Cutting units must be lowered to the ground.
14. Remove check valve (4) from the lift valve body (5).
15. Clean and inspect check valve for damage. Replace
as necessary.
16. Start the engine and raise the cutting units.
17. Stop the engine.
18. If lift cylinders continue to drift down, start the engine
and lower the cutting units.
19. Stop the engine.
IMPORTANT
Cutting units must be lowered to the ground.
20. Remove lower/proportional solenoid valve (3) from lift
valve body (5).
21. Clean and inspect lower/proportional solenoid valve
for damage. Replace as necessary. (See “Solenoid
Test” on page 4-63.)
The hydraulic system is under pressure, and the
oil will be hot.
• Always relieve pressure in the hydraulic
system before performing service.
• Failure to follow appropriate safety
precautions may result in death or serious
injury.
TN1406
1
2
TN1407
3
5
4

Textron Jacobsen AR-5 Specifications

General

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