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Attachment Clutch/Impeller Brake
To check impeller brake:
1. Tip unit forward onto auger/impeller housing.
2. Remove bottom cover by removing four cap
screws.
3. Measure distance between impeller brake shoe
pad and belt with attachment clutch engaged
(Figure 10). Impeller brake shoe should be 1/16"
(1.6 mm) minimum from belt. When attachment
clutch is disengaged, brake must contact belt.
To properly adjust attachment clutch/impeller brake:
1. Without the engine running, remove the belt cover.
Attachment brake is seated against the attachment
drive belt when the attachment clutch lever is in the
released (full up) position. Adjust the control cable
mounting nuts to snug up the control cable, then
back off on the top nut 2 turns to provide cable
slack for brake wear. Tighten bottom nut.
2. Start engine and run at full throttle. Slowly depress
the attachment clutch lever until the auger shaft
begins to rotate, observing the bolt at the end of
the auger shaft. The measurement between the
end of the attachment clutch lever and the handle
grip at this point should be between 3" and 3-1/4"
(7.62 - 8.25 cm) as shown in Figure 11. If this
dimension is not within this range shut off the
engine and adjust the attachment drive idler pulley
as required. A 1/16" (1.6 mm) adjustment of the
attachment drive idler pulley will result in an
approximate 1/4" (6.35 mm) change in the
attachment clutch control lever engagement
position. Moving the attachment drive idler pulley
toward the attachment drive belt will increase the
dimension between the attachment clutch control
lever and the handle grip.
3. Restart the engine and recheck the 3" - 3-1/4"
(7.62 - 8.25 cm) dimension.
4. Shut off the engine and install the belt guard.
WARNING:
AUGER/IMPELLER MUST STOP
within 5 seconds when attachment clutch/
impeller brake lever is released or unit
damage or serious injury may result.
ROTATING PARTS can cut off body parts.
Keep hands and feet away. Loose clothing,
long hair or scarves can get caught in rotating
parts and cause death or serious injury.
It is necessary to perform the adjustments
with the belt guard removed and extreme care
is to be taken to prevent injury. Stand well
clear of the open belt drive while engine is
running.
IMPROPER ADJUSTMENT could result in
death or serious injury.
IMPELLER BRAKE MUST DISENGAGE
when clutch is engaged. Brake must be 1/16"
(1.6 mm) minimum from belt when
disengaged.
BELT FINGERS MUST BE between 1/16 to
1/8" (1.6 - 3.2 mm ) from belt with attachment
clutch engaged or belt grabbing may occur
causing impeller to rotate while attachment
clutch is disengaged.
There MUST BE a slight amount of slack in
cable or impeller may rotate while attachment
clutch is disengaged.
1
2
3
1. Drive Belt
2. Brake Shoe and Pad
3. 1/16" (1.6 mm) minimum
OS0660
Figure 10