Jacobsen AR3, Technical/Repair Manual

Page: 238 / 342

HYDRAULICS
4181384 First Edition 6-47
6
Figure 6-41
4. Support the lift valve (18).
5. Remove two nuts (15), flat washers (14), screws (11)
and spacers (10), and remove lift valve (18) from
mower.
NOTE
Record the location and orientation of fittings on lift valve
to ensure correct installation.
6. Remove fitting (9) from the lift valve (18).
7. Remove tee fitting (13) and elbow fitting (12) from the
lift valve (18).
8. Remove fitting (16) from the lift valve (18).
9. Remove elbow fitting (17) from the lift valve (18).
Installation Notes
• Install lift valve by reversing the order of removal.
• Ensure new O-rings are in place before installing
hoses on fittings.
• Replace hydraulic filter.
• Refill hydraulic tank. (Refer to “Safety, Operation, and
Maintenance Manual” for oil specifications.)
• Start engine and check lift valve operation. Check for
leaks and repair as necessary.
Disassembly, Inspection, and Assembly
See Figure 6-42.
Figure 6-42
1. Remove, inspect and replace lift valve components
as needed.
NOTICE
2. Clean all parts using clean solvent, and dry using
compressed air.
3. Inspect all parts for wear or damage. Replace parts
as needed.
TN1334
9
18
15
12
17
16
14
13
10
11
1 Solenoid Coil (4) 6 Raise/Lower Solenoid Valve
2 Relief Valve 7 Check Valve
3 Hollow Hex Plug (9) 8 Pilot Piston
4 Orifice Plug 9 Primary Weight Transfer
Solenoid Valve
5 Lift Valve Block 10 Secondary Weight Transfer
Solenoid Valve
It is important that all components are absolutely
clean, as contamination can result in serious
damage and/or improper operation.
Never use shop towels or rags to dry parts after
cleaning, as lint may clog passages. Dry parts
using compressed air.
TN1335
1
3
1
5
2
4
1
8 7
9
10