Allis-Chalmers 400 Series - Page 19

Operating Controls
1. GEAR DISCONNECT LEVER
If the tractor is to be moved by hand or is to be
towed, the transmission gears must be disengaged
to prevent damage to the hydraulic pump and
motor.
The disconnect lever, at rear right hand corner of
tractor (Figure 5), must be pulled up to a vertical
position to disengage the gears. It must be pushed
to the right as shown to engage the gears for tractor
operation.
CAUTION: ALWAYS stop tractor engine,
set brakes and dismount from operators seat
before attempting to disconnect gears.
When engaging the disconnect lever it may be
necessary to release the tractor brake and move
tractor slightly by hand to align gear teeth and
permit shifting gears.
2. HYDROSTATIC TRANSMISSION CONTROL
LEVER (Figures 4 and 6)
The hydrostatic transmission is used to control
both the direction of travel and the ground speed
of the tractor. NEUTRAL position for the
hydrostatic transmission control lever is as shown
with the back of the control lever guide resting
against the notched portion of the guide. The
hydrostatic transmission control lever must be in
this neutral position for the engine starter to
operate.
To move the tractor FORWARD, grip the control
lever squeezing the lock release handle toward
the lever and move the control lever forward. The
farther forward from neutral the control lever is
pushed, the faster the tractor will move forward at
a given engine speed. To slow or stop the tractor
when it is moving forward, squeeze the lock
release hand le toward the lever and pu 11 the
control lever rearward slowly toward the neutral
position. You can place the hydrostatic trans¬
mission in neutral from the forward position
without watching it by slightly pushing to the right
on the control lever as it is moved rearward. The
control lever will stop against the notched portion
of the guide when it reaches neutral.
To move the tractor in REVERSE, squeeze the
lock release handle toward the lever, push the lever
to the left and pull it back from the neutral
position. The farther back the control lever is
moved, the faster the tractor will travel in reverse.
To stop the tractor while moving in reverse, squeeze
the lock release handle toward the lever and move
lever forward slowly to the neutral position. In
emergency situations, you may use the foot clutch
brake pedal to stop.
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