Smithco 20-500-C, Parts & Service

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9
Ser
vice
ADJUSTMENTS
WHEEL CREEP
"Creep" is when the engine is running and hydrostatic transmission is in neutral, but due to inadequate align-
ment, wheels still move. Do the following procedure to stop this motion.
1. Lift up and support machine so rear wheels are off the ground and can turn freely.
2. In the engine compartment, the hydrostatic transmission
is on the left side. The shift arm (D) is under the pump and
comes out the side. The idler arm (B) has a bearing that
runs in the notch of the shift arm. Loosen bolt (A).
3. With engine running, move bearing (B) so it centers on the
shift arm (D) and 'wheel creep' stops.
4. Tighten all fasteners and test by using foot pedal linkage to
see that 'creep' is removed.
5. Turn engine off and lower machine.
SPRAY PUMP WITH BELT
Located below the engine. The belt should have approximately
1
/
2
" (13mm) of deflection in the center of the top strand. Loosen and tighten the
5
/
16
-18 x 1
1
/
4
set screw located
on the foot of the pump mount.
PARK BRAKE
Turn knob clockwise on end of park brake to tighten. Turn it counter clockwise to loosen. If finer adjustment is
needed turn clevis on brake cable to adjust length of cable.
MASTER BOOM SWITCH (FOOT SWITCH)
The master boom switch, located on the left floorboard is used to override the master switch on the computer
console of the spray systems. By pushing down it will turn on/off the booms.
GROUND SPEED CONTROL (FOOT SWITCH))
The ground speed control does not work the same as an automotive type cruise. The ground speed control is
located on the left floorboard and is used to lock forward speed.
TO ENGAGE:
1. Flip rocker switch ‘On’ (green light).
2. Obtain desired speed with foot pedal.
3. Step on foot switch to lock speed.
4. Push foot switch again to disengage.
SPRAY BOSS CONTROL - ORANGE
Engages and disengages speed boss. Forward is engage and all the way back is disengage. When the lever
is engaged it sets a stop for the accelerator. The accelerator pedal must be used to maintain this speed. To
adjust speed use the knob on the end of the lever, counter clockwise increases speed and clockwise decreas-
es speed. Disengage the lever and you will have full accelerator pedal range.