Simplicity AGCO Allis 400 Series, Service & Repair Manual

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8 - 9
8 Hand Controls Repair
Throttle Control Repair
THROTTLE CONTROL REPAIR
The throttle control is attached to the underside of the
seat deck.
Throttle Knob Replacement
1. Remove the throttle lever knob:
a. Round throttle knob - Unscrew the knob from the
throttle lever by turning the knob counterclock-
wise.
b. Flat style knob - Remove the knob by pulling it
straight off the throttle lever.
2. Inspect the knob for cracks or other damage, and
replace if required.
One-Piece Throttle Service
1. Remove the throttle knob by pulling it straight off the
the throttle lever.
2. Unscrew the plastite screws (P, Figure 6) securing
the one-piece throttle assembly (Q) to the underside
of the seat deck, and remove the throttle/cable
assembly.
3. Inspect the assembly for wear or damage and
replace as required. (Consult engine manufacturer's
manual for throttle cable connection to engine throttle
linkage, if necessary.)
4. Reassemble in reverse order of disassembly.
Multi-Piece Throttle Service
1. Remove the wire clip securing the throttle cable (N,
Figure 6) to the throttle lever by removing the truss
head screw and nut assembly (B and M)
2. Disengage the throttle cable from the throttle lever,
and loosely reinstall the screw and nut on the clip to
avoid loss during service.
3. Remove the throttle lever from the throttle mounting
bracket by unscrewing the hex locknut (I, Figure 6)
from the carriage bolt (C). (Keep the head of the car-
riage bolt against the throttle lever to keep the bolt
from turning while the locknut is being removed.)
4. Slide the carriage bolt and throttle lever out of the
throttle lever mounting bracket, catching the spring
and washers as the carriage bolt is removed from the
assembly.
5. Check the throttle lever mounting bracket (G, Figure
6) for wear or damage. Remove and replace if nec-
essary by unscrewing the three plastite screws
securing the bracket to the underside of the seat
deck.
6. Reassemble parts in reverse order of disassembly,
using care to position the nylon washers on both
sides of the throttle lever mounting bracket, and the
metal washers on both sides of the spring , as shown
in Figure 6.
7. Adjust spring tension to provide secure positioning of
lever while allowing smooth operation of lever.
Throttle Tension Adjustment
(Multi-Part Throttle Units Only)
Note: Later models use a “one piece” non-adjustable
throttle control that is replaced as an assembly.
1. Increase Tension - Tighten the locknut (I, Figure 6)
by turning clockwise.
2. Decrease Tension - Loosen the locknut (I, Figure 6)
by turning counterclockwise.
NOTE: When properly adjusted, the throttle lever will
allow positioning with light force, and will maintain the
selected position without slippage while the unit is being
operated.