Walker MDD (20.9 HP) - Manual (Page 79)

Maintenance Instructions
REPLACING/REPAIRING
75
GHS Blower Assembly (and/or Blower Wheel)
GHS Blower Assembly Removal
1. Remove the mower deck. Refer to Deck Instal-
lation in
Assembly Instructions and reverse the
procedure to remove the deck.
Remove Skid Bar for
GHS Blower Removal
2. Remove the blower faceplate by removing six
(6) 1/4-20 nuts.
3. Remove the GHS blower drive belt. Refer to
REPLACING/REPAIRING the Drive Belts in
this section for instructions.
4. Remove the blower assembly from the chassis
as follows:
a. Remove the blower skid bar by removing
front and rear mounting bolts from the skid
bar (underneath the blower) and removing
the bolt connecting the blower housing to
the skid bar.
b. Remove the blower belt tightener idler arm
assembly by removing the pivot bolt.
c. Remove two (2) bolts mounting the blower
housing to the frame.
d. Lower the blower assembly straight down
out of the chassis frame and remove.
Blower Wheel Removal
When required, replace the blower wheel using the
following procedure:
1. Loosen blower pulley set screws and remove
the pulley using a wheel puller.
2. Remove the locking collar from the back bear-
ing (closest to the pulley) by loosening the set
screw and rotating the collar counterclockwise
(use punch to drive).
3. Press blower wheel out of the housing using a
wheel puller hooked to lugs on the bearing
housing. The bearings have been secured in
the housing with a retaining compound - Loc-
tite
®
RC/680, and considerable force will be
required to break this bond. After the bearings
have “broken loose” from the housing, only light
pressure should be required to remove the
wheel assembly out of the housing.
NOTE: It may or may not be possible to remove
the front bearing from the blower wheel without
damaging it. If the bearing is damaged, it will
need to be replaced along with the wheel.
Pressing Blower Wheel Out of Housing
Skid Bar
Skid Bar Mounting Bolts
Blower Assembly
Wheel Puller
Hooked to Lugs
on Bearing Housing