Speed Selector Pivot Adjustment; Traction Drive Clutch Rod Adjustment - Simplicity 1693646 555M Operator's Manual

Service
SPEED SELECTOR PIVOT ADJUST-
MENT
The Speed Selector is factory set for optimal perfor-
mance at each forward and reverse speed setting.
However, if drive system components have been
replaced, adjustment may be necessary.
Adjust as follows:
1. Move the ground speed control (A, Figure 20) fully
forward.
2. Loosen the hardware (B) securing the upper and
lower shift rods.
3. Push the lower rod (C) down fully (into the housing).
4. Make sure the ground speed control (A) is in the full
forward (5th gear) position. Tighten the shift rod
hardware (B).
TRACTION DRIVE CLUTCH ROD
ADJUSTMENT
Initial Adjustment
The traction drive clutch rod should initially be adjusted
so that there is no slack in the rod when moved slightly
from side to side, but bellcrank arm remains in fully down
position. To adjust tension on the rod:
1. Loosen adjustment hex nuts (Figure 21).
2. Tighten top hex nut while holding rod. Tighten just
until slack in rod is removed.
3. Tighten lower hex nut securely.
WARNING
Do not over-tighten, as this may cause traction
drive to engage without depressing the traction
Drive Control (bellcrank arm must remain in down
position).
Verify that the rods are not over-tightened: With
Speed Selector in position 1 and traction Drive
Control fully released, push snowthrower
forward. The unit should move forward freely.
If unit does not move forward freely, the rod has
been over-tightened. To remedy, loosen tension
on clutch rod slightly, and recheck.
Figure 20. Speed Selector Linkage Adjustment
A. Ground Speed Lever
B. Shift Rod Hardware
C. Lower Shift Rod
Traction Drive
Bellcrank Arm
Figure 21. Traction Drive Clutch Rod Adjustment
Run-In Adjustment
1. After 5 hours of use, check for proper adjustment.
Readjust clutch rod if necessary by increasing ten-
sion on rod. A small amount of bellcrank arm move-
ment is permissible if unit passes operating checks
described in the Caution at left. Optimal adjustment
provides 1/32" clearance between traction drive
disc and rubber ring on friction disc when drive
lever is released (see Figure 17).
18
A
Traction Drive
Clutch Rod
Adjustment
Hex Nuts
Traction Drive
Clutch Rod Spring
B
C