Textron JACOBSEN GP400, Technical/Repair Manual

Page: 151 / 354

HYDROSTATIC POWER TRAIN
4252490-Rev A 5-33
5
Figure 5-17
NOTE
The neutral adjustment has two stages: coarse and fine
adjustment:
• Use coarse adjustment procedure if the control
mechanism has been removed from the pump, or if
correct adjustment cannot be obtained using the fine
adjustment.
• Use fine adjustment procedure for normal
adjustment.
Coarse Adjustment:
9. Loosen three screws (5) holding cam plate (4) to the
pump.
10. Rotate cam plate (4) as needed until the bearing (7)
is positioned in the V-shaped notch in the cam plate.
11. Tighten screws (5).
12. Proceed to “Fine Adjustment.”
Fine Adjustment:
13. Loosen lock nut (8) just enough to allow rotation of
eccentric screw (6).
14. Rotate eccentric screw (6) until front wheels begin to
rotate. Note position of screw.
15. Rotate eccentric screw (6) in the opposite direction
until front wheels begin to rotate in the opposite
direction. Note position of screw.
16. Hold eccentric screw (6) midway between the
positions noted in steps 14 and 15 and tighten lock
nut (8).
17. Stop engine and engage park brake.
Figure 5-18
18. Connect traction control cable (3) to cam plate (4),
using nut (2).
TN3908
8
7
6
4
5
TN3909
2
3
4