Textron Jacobsen AR-5 Technical/Repair Manual

6-28 4181383 First Edition
HYDRAULICS
6
Adjust Cutting Unit System Relief
Valve Pressure
See Figure 6-21.
!
WARNING
NOTE
This adjustment should be done in conjunction with front
cutting units circuit valve tests.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-5.)
2. Perform front cutting units circuit valve test. (See
“Front Cutting Units Circuit Valve Tests” on
page 6-26.)
Figure 6-21
3. Remove cap (1).
4. Rotate screw (2) to adjust the relief valve pressure
setting.
• To increase the pressure setting: Turn the screw in
(clockwise).
• To decrease the pressure setting: Turn the screw out
(counterclockwise).
5. Install cap (1).
Could relief valve be adjusted to 2600 psi (179
bar)?
YES Cutting unit system relief valve is good.
Proceed to step 6.
NO Repair or replace cutting unit system relief
valve. (See “Deck Valve” on page 6-45.)
6. Disconnect and remove test equipment. Install all
hoses and fittings as noted prior to removal.
7. Install and connect all components as noted prior to
adjustment.
8. Check hydraulic oil level. Add oil as needed. (Refer to
“Safety, Operation, and Maintenance Manual” for
correct oil specifications.)
Front Cutting Units Motors Test
See Figure 6-22.
IMPORTANT
• This test works together with the front cutting
units circuit test to isolate a problem with the
front cutting units circuit.
• Performing this test will isolate the front cutting
unit motors from the rest of the front cutting
units circuit.
!
WARNING
1. Park the mower safely. (See “Park Mower Safely” on
page 1-5.)
2. Before performing this test, perform front cutting units
circuit test, leaving flow meter connected as outlined
3. Bypass seat switch.
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.
Required Tools and Materials
• Flow Meter
• -8 ORFS Test Hose 3000 psi (207 bar)
• -8 ORFS Tee Fitting
• -10 ORFS Blocking Disk
1
TN1413
2
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.
Required Tools and Materials
• Flow Meter
• -8 ORFS Test Hose 3000 psi (207 bar)
• -8 ORFS Tee Fitting
• Blocking Device or Tool

Textron Jacobsen AR-5 Specifications

General

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