Cub Cadet OEM-390-679 - Manual (Page 18)

18
6
Maintaining
Your Snow
Thrower
WARNING
Before lubricating,
repairing or
inspecting, disengage
all controls and stop
engine. Wait until all
moving parts have
come to a complete
stop. Remove the
safety key to prevent
unintended firing of
the engine.
8. Place a block of wood underneath the auger housing
as shown in Figure 6-9 and separate auger housing
from the frame by tilting the housing forward and
pulling up the handles.
9. Block the impeller with a piece of wood to prevent if
from spinning and use a 1/2” wrench to remove the
hex screw and washer from the center of the pulley on
the auger housing. See Figure 6-10.
10. Lift the brake bracket assembly out of the pulley
groove and slide the pulley assembly off the posts of
the auger pulley adapter to remove the old belt. Refer
to Figure 6-10.
NOTE: The pulley adapter may slide off the auger input
shaft when removing the pulley. Use extra caution to
ensure the adapter does fall and/or get damaged when
removing the pulley.
11. Place the new auger belt in the V-groove of the
auger pulley and place the pulley w/belt inside the
belt keepers.
12. Turn the pulley as necessary to align its three slots
approximately with the posts of the pulley adapter,
then move the brake bracket assembly away from
the input shaft. While aligning the pulley slots and
adapter posts, push the auger pulley fully onto the
adapter. Refer to Figure 6-10.
NOTE: If the pulley adapter was removed with the
pulley, align the splines of the pulley adapter and auger
input shaft, and push the pulley and adapter onto the
input shaft. Refer to Figure 6-10.
13. Slide the washer onto the hex screw removed earlier
and apply Loctite 262 to the threads of the hex screw.
14. Insert the hex screw through the pulley assembly
and into the threads of the input shaft. Torque the
hex screw to 250-325 in./lbs. to secure the auger
pulley assembly on the input shaft.
If also replacing the drive belt, proceed to the “Drive Belt”
instruction. If not, reassemble by performing the previous
steps in the opposite order and manner of removal.
NOTE: Make sure to remove the piece of wood blocking
the impeller.
Proper Adjustment: With the auger clutch lever in the
disengaged position, the top surface of the new belt
should be even with the outside diameter of the pulley.
1. To adjust, disconnect ferrule from brake bracket
assembly and thread ferrule in (towards idler) to
increase tension on belt, and out to decrease tension.
See Figure 6-6.
NOTE: The brake puck must always be firmly seated in
the pulley groove when auger control is disengaged.
IMPORTANT: Repeat the “Auger Drive Control Test” from
the Assembly section before operating snow thrower.
Figure 6-9
Figure 6-11
Figure 6-10
IMPORTANT
Refer to the Final
Adjustment section of
the Set-Up instructions
after replacing drive
and auger belts.
A
C
B
Pulley Slot
Adapter Post
Drive Belt
1. If not already done, remove auger belt as previous
instructed.
a. Pull the idler pulley away from the backside of the
drive belt to relieve the tension.
b. Slide the drive belt off the idler pulley. See Figure
6-11. Carefully release the idler pulley.
2. Remove the belt from the bottom drive pulley.
3. Remove the belt from the engine pulley.
1b
2
1a
3