Service Manual

8-25

WPM Drive Systems Manual

BBC/BOS/BCS

IdlerArmSystemAssembly(Recycler/Rear

Bagger)

1. Start by installing the key and self-propel pulley. The

two bumps on the pulley should face you (Fig. 226).

Slip the belt over the pulley.

The ywheel must be installed with the side that

looks like 1/2 of a pulley facing the brake drum

(Fig. 227). Push the ywheel rmly on the taper of

the crankshaft. If you can’t push the ywheel on far

enough to hold, do not be concerned. DO NOT drive

it on with a hammer.

2. Install the ywheel. The two bumps on the pulley

MUST engage the holes in the ywheel. If not, when

the nut on the crankshaft is tightened, the ywheel

will push the pulley upwards, either breaking the wall

out of the key groove or crushing the two bumps or

both.

Fig226 3428-0117

Fig227 MVC-727

A. Bumps B. Holes in ywheel

3. Note the two small foam pads inside the brake drum

(Fig. 228).

Fig228 3428-0188

A. Foam pad