Textron JACOBSEN GP400, Technical/Repair Manual

Page: 243 / 354

HYDRAULICS
4252490-Rev A 6-51
6
Figure 6-56
4. Thoroughly clean the valve, especially the area
surrounding the hydraulic hoses, tubes, and fittings.
NOTES
• Label all hydraulic hoses and tubes before
disconnecting to ensure correct installation.
• Close all openings with caps or plugs to prevent
contamination.
5. Disconnect hydraulic tubes (2 and 4).
6. Loosen set screw (6), and remove knob (7).
NOTE
Record the orientation of the soft drop valve before
removing to ensure correct installation.
7. Remove nut (5), and remove soft drop valve (3).
Installation Notes
• Install soft drop valve by reversing the order of
removal.
• Make sure new O-rings are in place before installing
lines on fittings.
• Replace hydraulic oil charge filter. (See “Hydraulic
Oil Charge Filter Assembly” on page 6-59.)
• Start engine. Check hydraulic system for leaks.
Repair as necessary.
• Check hydraulic oil level and add if necessary.
Top and Bottom Sequence Valves
Removal and Installation
See Figure 6-57.
NOTE
The top sequence valve is shown; the bottom sequence
valve is similar.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Disconnect the negative (–) battery cable from the
battery.
3. Raise fuel/hydraulic tank. (See “Fuel Tank (Diesel)”
on page 9-7.)
Figure 6-57
4. Thoroughly clean the valve, especially the area
surrounding the hydraulic hoses, tubes, and fittings.
NOTES
• Label all hydraulic hoses and tubes before
disconnecting to ensure correct installation.
• Close all openings with caps or plugs to prevent
contamination.
5. Disconnect hydraulic tubes (1 and 3).
6. Loosen set screw (6) and remove knob (5).
NOTE
Record the orientation of the sequence valve before
removing to ensure correct installation.
7. Remove nut (4), and remove sequence valve (2).
TN3787
5
7
6
TN3782
3
2 1
4
5
6