3.12.If adjustment is necessary, remove the cutting deck.
3.13.Inspect the return to neutral cylinders, rods, and bellcranks of the hydro control linkages.
•The bellcranks should pivot easily without too much play.
•The rods should not be bent, and the rod ends should not be loose.
NOTE: The rod end and jam nut at the rear of each connector rod have left hand threads. A lock washer is placed between the control input arm on the hydro pump and the rod end.
NOTE: The rod end and jam nut at the front of each connector rod have right hand threads. A spacer fits between each control hub assembly (bellcrank) and the front rod end that connects to it.
•The return to neutral cylinders should both work as advertised. See Figure 3.13.
RETURN TO NEUTRAL
CYLINDER (RIGHT)
Figure 3.13
NOTE: Remove the control console to gain access to the return to neutral cylinder.
M48 Tank
3.14.Loosen the jam nuts at each end of the hydro control link rods, and rotate the rods to lengthen or shorten them. See Figure 3.14.
Figure 3.14
3.15.Start the engine and release parking brake to test, then turn the engine off to make the adjust- ment.
3.16.Tighten the jam nuts against the rod ends when adjustment is complete, and make a final test to confirm.
3.17.After neutral control is correctly adjusted, set the travel stops to achieve correct tracking and adjust the lap bars for operator comfort.
See Figure 3.17.
LAP BAR
MOUNTING
HANDLE
CLAMP
BOLTS
JAM
NUT
LAP BAR TRAVEL
STOP BOLT
Figure 3.17
NOTE: The clamp bolts for the lap bar mounting handle can be used to adjust the amount of force required to move the lap bars into or out of the neutral slot.
3
