Textron JACOBSEN GP400, Technical/Repair Manual

Page: 238 / 354

6-46 4252490-Rev A
HYDRAULICS
6
Lift Valve
Removal and Installation
See Figure 6-47.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
NOTE
The lift valve is located below the seat platform.
2. Remove seat and seat plate. (See “Seat and Seat
Plate” on page 9-15.)
Figure 6-47
NOTE
Label wire connectors before disconnecting to ensure
correct installation.
3. Disconnect wire connectors (4 and 5).
NOTES
• Label all hydraulic hoses and tubes before
disconnecting to ensure correct installation.
• Close all openings with caps or plugs to prevent
contamination.
4. Disconnect hydraulic tubes (7–9).
5. Disconnect hydraulic tubes (1 and 11).
6. Support lift valve (10).
7. Remove two mounting screws (2) and washers (3).
8. Remove lift valve (10).
Installation Notes
• Install lift valve by reversing the order of removal.
• Ensure new O-rings are in place before installing
hoses on fittings.
• Apply dielectric grease (Jacobsen PN 365422) to any
wire connectors disconnected.
• Replace hydraulic oil charge filter. (See “Hydraulic
Oil Charge Filter Assembly” on page 6-59.)
• Refill hydraulic tank. (Refer to “Parts and
Maintenance Manual” for correct oil specifications.)
• Start engine. Check hydraulic system for leaks.
Repair as necessary.
• Check hydraulic oil level and add if necessary.
Disassembly, Inspection, and Assembly
See Figures 6-48 and 6-49.
Figure 6-48: Lift Valve
NOTE
Record the location and orientation of fittings before
removing to ensure correct installation.
1. Remove, inspect, and replace fitting (1) from port “T.”
2. Remove, inspect, and replace fitting (2) from port “P.”
3. Remove, inspect, and replace tee-fittings (3 and 4)
from ports “A” and “B.”
TN3775
10
11
1
4
5
2
6
9
3
7
8
TN3800
4
2
3
1