HYDROSTATIC POWER TRAIN
4203781 First Edition 5-53
5
14. Remove O-rings (19 and 20) and backup ring (18)
from check valve (21).
15. Remove secondary 4WD shuttle valve (23) from
valve block (26).
16. Remove O-rings (22 and 24) and backup rings (25)
from secondary 4WD shuttle valve (23).
NOTICE
17. Clean all parts using clean solvent and dry using
compressed air.
18. Inspect all parts for wear or damage. Replace parts
as needed.
Assembly Notes
NOTICE
• Assemble the 4WD valve by reversing the order of
disassembly.
• Lubricate all O-rings prior to assembly.
Control Valve
Removal and Installation
See Figure 5-50.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Drain hydraulic oil tank. (See “Hydraulic Oil Tank—
Drain Procedure” on page 6-58.)
Figure 5-50
NOTE
The control valve is located on the right side of machine.
3. Remove cover (1).
4. Thoroughly clean the valve, especially the area
surrounding the hydraulic hoses, tubes, and fittings.
NOTE
Label connectors before disconnecting to ensure correct
installation.
5. Disconnect electrical connectors (8 and 10).
NOTES
• Label all hydraulic hoses and tubes before
disconnecting to aid in installation.
• Close all openings with caps or plugs to prevent
contamination.
• Hydraulic hose (12) is connected to port “T” on the
back of control valve (14).
6. Disconnect hydraulic hoses (3, 9, 11, and 12).
7. Disconnect hydraulic tubes (2 and 13).
• It is important that all component parts 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.
• It is important that all component parts 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.
Required Materials
• Seal Kit, Check Valve (Jacobsen PN 5003581)
• Seal Kit, Spool Valve (Jacobsen PN 5003581)
• Seal Kit, Solenoid Valve (Jacobsen PN 5003578)
TN2334
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