5-50 4203780 First Edition
HYDROSTATIC POWER TRAIN
5
Traction Pump
Removal and Installation
See Figures 5-46 and 5-47.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Remove seat and seat platform. (See “Seat and Seat
Platform” on page 9-13.)
3. Drain hydraulic oil tank. (See “Hydraulic Oil Tank—
Drain Procedure” on page 6-58.)
4. Remove gear pump. (See “Gear Pump” on
page 6-58.)
Figure 5-46
5. Thoroughly clean the pump, especially the area
surrounding the hydraulic hoses and fittings.
NOTES
• Label all hydraulic hoses before disconnecting to
ensure correct installation.
• Close all openings with caps or plugs to prevent
contamination.
6. Disconnect hoses (1 and 14) from tee fitting (2).
7. Disconnect hoses (3 and 5) from tee fitting (4).
8. Disconnect hoses (7 and 8) from tee fitting (6).
9. Disconnect hose (9) from tee fitting (10).
10. Disconnect hoses (11 and 12) from tee fitting (13).
Figure 5-47
11. Remove two screws (16) and lockwashers (17).
Remove top block (15) and traction arm (23) from the
pump control shaft.
!
WARNING
12. Attach a suitable lifting device to the traction pump
(18).
13. Remove two nuts (19), lock washers (20), and bolts
(21).
14. Move the traction pump (18) toward the front of the
machine until the input shaft clears the front U-joint.
Remove the traction pump from the frame (22).
Installation Notes
• Install the hydrostatic pump by reversing the order of
removal.
• Lubricate all O-rings prior to assembly.
• Make sure new O-rings are in place before installing
hoses on fittings.
• Pressure filter the hydraulic system. (See “Portable
In-Line Filter” on page 5-4.)
• Fill the hydraulic oil tank. (Refer to “Safety, Operation,
and Maintenance Manual” for the correct oil
specifications.)
• Start engine. Check for leaks and repair as
necessary.
TN2039
1
4
6
2
5
14
3
7
8
9
10
11
12
13
Prevent personal injury. Use a properly rated
lifting device. Always be sure the load is
balanced before lifting.
16
TN2035
17
18
15
23
19
20
21
22
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