Allis-Chalmers 400 Series - Transmission and Component Adjustments

Adjustments
FIGURE 20
3. SEAT ADJUSTMENT
IDLER FRAME
IDLER PULLEY SPRING
WING NUT
I RIGHT HAND;
ilDLER PULLEY
5 WING NUT ROD
- - ■
INDICATOR!
ZONE
FIGURE 21
1. T urn wing nut counter-clockwise several turns
until nut and lockwasher, which are on the
wing nut rod back of the idler frame, are loose
enough to turn by hand.
The operators ^at may be moved forward or
backward to accommodate leg length. To adjust,
unlatch seat latch by pushing it to right and lift
seat and seat platform, (Figure 20). Remove 4
seat mounting bolts and reposition seat fOTward or
backward until operators right foot is in position
for comfortable, effective operation of clutch
brake pedal. Bolt seat to seat platform using set
of holes nearest the desired seat location.
4. FRONT POWER TAKE OFF IDLER ADJUST¬
MENT
When using implements driven by the front power
take off, the idler pulleys mounted in the idler
frame must be adjusted as belts wear and stretch,
or when new belts are installed.
Refer to Figure 21. The right hand pulley is
spring loaded. As belt stretches the lever and
indicator, which are part of the right hand idler
pulley mounting, will move forward in relation to
the idler frame when indicator gets to the forward
edge of the green zone, belt is too loose for proper
operation and idler must be readjusted as follows:
2. Turn nut clockwise to move nut rearward on
wing nut rod until it has about a half inch
clearance to idler frame.
3. Turn wing nut clockwise to pull wing nut rod
forward. This moves left hand idler forward
and right hand idler rearward. Turn wing nut
until indicator is near the rear edge of the green
mark.
4. Turn nut forward against lockwasher and idler
frame until finger tight, then turn wing nut
clockwise until lockwasher is locked against
idler frame.
5. When installing new belt turn wing nut
counter-clodcwise until it is almost at end of
wing nut rod. Install belt and adjust as in steps
3 and 4 above.
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