Cub Cadet 300 Series - Manual (Page 38)

AUGER SYSTEM
34
Auger Housing disassembly: impeller brake replacement
1. The idler pulley that applies tension to the auger belt can be
reached for removal by simply taking-off the belt cover.
• An idler pulley is mounted to an arm that is pulled by the
auger control clutch cable.
• The other end of the arm works as a brake, against the pul-
ley that turns the impeller shaft.
• When that cable is pulled, the idler pulley tightens the belt,
engaging the impeller and auger.
• When the cable is released, a spring pulls the idler pulley
away from the belt and draws the brake arm into the groove
of the pulley that turns the impeller shaft.
2. Use a pair of 9/16” wrenches to remove the pulley and
spacer. This is easy on single-speed snow throwers.
See Figure 4.25.
3. Remove the variable speed pulley control arm as described
in the DRIVE SYSTEM section of this manual.
See Figure 4.26.
• On three-speed snow throwers, the arm that moves the
variable speed cover must also be removed.
• The arm over-hangs the pulley, blocking its removal.
4. If the brake arm is to be removed, the auger drive pulley
must come off first.
4a. Separate the auger housing from the engine and drive
unit.
4b. Remove the bolt that holds the auger pulley to the
auger shaft using a 1/2” wrench. See Figure 4.27.
NOTE: The auger brake may need to be moved over briefly
to clear the pulley.
4c. Pull the auger brake clear of the pulley.
4d. Remove the pulley.
5. There are two holes in the impeller. Rotate the impeller to a
position where one of those holes allows wrench access to
the nut on the brake arm pivot bolt.
Figure 4.25
Cable-end
spring
Brake arm
Idler
pulley
Figure 4.26
Figure 4.27