Cub Cadet I-Beam Style - Manual (Page 111)

4-2
7. Remove the nozzle cover and lower housing
from the upper housing.
8. Remove the hex bolt and lock washer securing
the impeller assembly to the crankshaft using a
9/16" socket. See Figures 4-5 and 4-6.
NOTE
There is a flat washer between the lock nut
and impeller assembly.
Figure 4-5.
Figure 4-6.
9. Apply lubricant to the threads of the impeller
removal tool (part number 753-0638). Thread
the tool into the crankshaft until the impeller
assembly can move on the crankshaft.
10. Remove the impeller assembly from the crank-
shaft. Unthread the impeller removal tool from
the impeller assembly.
NOTE
The impeller assembly is made of aluminum.
11. Remove the chipper blade using a 3/16" allen
wrench and a 1/2" open end wrench.
12. Replace chipper blade.
NOTE
Torque chipper blade screw to 210 to 250 inch
pounds.
NOTE
Make certain the chipper blade is installed with
the sharp edge facing upward.
13. Reassemble in reverse order above.
NOTE
Torque the impeller bolt to 375 to 425 inch
pounds.
REMOVAL AND REINSTALLATION OF THE FLAIL
SCREEN
NOTE
Prior to performing flail screen removal,
remove the vacuum bag or blower chute from
the unit.
1. Remove the hex screw, flat washer, and lock
nut securing the flail screen to the top of the
rear housing using a 1/2" wrench.
2. Remove the flail screen.
SAFETY SWITCH
The safety switch is located at the rear of the
unit. It is mounted to the upper impeller hous-
ing assembly. A ground magneto wire runs
from the engine to the left side terminal of the
safety switch. The right side terminal of the
safety switch has a wire running to frame
ground. The safety switch is a normally closed
switch. This means that at rest, plunger up, the
switch will be closed. Anytime the vacuum bag
or blower chute is attached to the unit, the
safety switch plunger will be depressed. Any-
time neither the bag or chute is present, the
switch will be up and the magneto will have a
path to frame ground. This would prevent the
engine from running. If the safety switch is
operating properly, the engine will not run with-
out the bag or blower chute attached.
CHIPPER SHREDDER VACUUM.fm Page 2 Tuesday, February 19, 2002 2:19 PM