Simplicity 1693164 755M Speed Selector Pivot Adjust- Ment, Traction Drive Clutch Rod Adjustment

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 speed position 1 is too slow, the speed can be increased by changing the pivot position one turn. Do not turn pivot more than one turn - increasing forward speed using this method reduces reverse speed by a like amount, and inadequate reverse speeds will result.

Adjust as follows:

1.Loosen pivot jam nut to permit pivot adjustment (Figure 17).

2.Pull hitch clip pin out of pivot and remove washer.

3.Looking at end of threaded Speed Selector shaft, turn pivot one turn counter-clockwise.

4.Reassemble pivot to control arm and secure with washer and hitch clip pin.

5.Tighten jam nut.

6.Check speed position 1 for adequate speed. If unit still moves too slowly, return pivot to original position and use speed position 2 as a starting speed in place

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 18).

2.Tighten top hex nut while holding rod. Tighten just until slack in rod is removed.

3.Tighten lower hex nut securely.

CAUTION

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 overtightened: 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.

Speed

Selector

Hitch Clip Pin

Pivot

Jam Nut

Figure 17. Speed Selector Pivot Adjustment

Traction Drive

Clutch Rod

Adjustment

Hex Nuts

Traction Drive

Clutch Rod Spring

Traction Drive

Bellcrank Arm

Figure 18. 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 14).

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