Textron Jacobsen AR-5 Technical/Repair Manual

6-38 4181383 First Edition
HYDRAULICS
6
Figure 6-32
3. Disconnect hose (2) from fitting (1).
Figure 6-33
4. Install tee fitting (5) to fitting (1).
5. Connect flow meter inlet test hose (6) and hose (2) to
tee fitting (5).
NOTE
Make sure hose end is under oil level in hydraulic tank to
prevent aeration of oil.
6. Connect flow meter outlet test hose (3) to the
hydraulic tank.
7. Open flow meter valve (4) completely.
8. Bypass seat switch.
NOTE
Verify engine rpm is within specification (2850 rpm ± 50)
to ensure accurate hydraulic test results.
9. Start engine and run at full throttle (2850 rpm ± 50).
!
CAUTION
10. Use the flow meter to warm the hydraulic oil. Turn the
flow meter valve (4) until a reading of 900 psi (62 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. Hold the lever in the raise position.
12. Read and record the lift/steer pump no load flow.
13. While holding the raise/lower lever in the raise
position, slowly close flow meter valve (4) until
pressure reaches 1300 psi (90 bar).
14. Hold the lever in the raise position.
15. Read and record the lift/steer pump loaded flow.
16. Open flow meter valve (4) and stop engine.
17. Calculate lift system leakage. (Step 12 – Step 15 /
Step 12 x 100 = Leak Percentage)
Is lift system leakage 10% or less?
YES The lift system is good. Proceed to step 18.
NO Proceed to next question.
Is lift system leakage 11% to 20%?
YES The lift system is marginal. Additional testing
is required.
NO Proceed to next question.
Is lift system leakage 21% or more?
YES Test individual components in lift system for
leakage.
18. Disconnect and remove test equipment. Install all
hoses and fittings as noted prior to removal.
19. Install and connect all components as noted prior to
test.
20. Check hydraulic oil level. Add oil as needed. (Refer to
“Safety, Operation, and Maintenance Manual” for
correct oil specifications.)
TN1395
1
2
5
6
TN1363
4
3
Do not exceed 1800 psi (124 bar) as this test does
not utilize system relief.

Textron Jacobsen AR-5 Specifications

General

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