Inspection Of Parts; Drive Shaft - Troy-Bilt 4HP Technical Manual

ACAUTION
While the chipper chute is removed, do not place
your hands inside the chipper blade access opening.
The chipper blade that is located inside the open-
ing (on the chipper flyWheel) is extremely sharp
and can cause serious personal injury.
STEP 16.
Remove the two flangettes and the bearing between them by
prying out the inner f1angette with a screwdriver, or by tapping
the opposite end of the cylinder shaft with a soft mallet. If
necessary, apply penetrating oil to the shaft to help free the
bearing. Save the f1angettes, bearing and three locknuts and
screws for reuse.
STEP 17.
Remove the cylinder shaft:
A. Note the position of the cylinder shaft relative to the hole
in the shredder wall (see Fig. 11). The shaft must be cen-
tered vertically in the hole of the main frame. If it isn't cen-
tered, reposition the cylinder shaft by adjusting the length of
the rope or twine that supports the cylinder assembly.
B. On the engine side of the cylinder shaft, make certain that
the shaft is clean and free of any burrs or rust. It also must be
well-lubricated with oil. NOTE: If the pulley is still on the shaft,
be sure to clean and lubricate the shaft after the pulley is
removed in Step D below.
C. Spray penetrating oil into the two screw holes in the cylin-
der assembly tube from which you removed the screws in
Step 12 (see Fig. 9).
D. On the engine side of the cylinder shaft, use a soft mallet
to tap the shaft a little toward the chipper side. As the shaft
moves forward, remove the pulley (if still on), its key, and the
locking collar if not done so previously.
E. Continue driving the shaft inward until the keyway end of
the shaft is flush with the slotted bearing sleeve on the engine
side of the main frame (see Fig. 12). Now spray additional
penetrating oil into the two screw holes mentioned in Step C
above.
F. Using a long drift pin or punCh, drive the shaft all the way
out. If there is any binding along the way, spray additional oil
into the two screw holes in the cylinder assembly tube.
5
Fig. 12
STEP 18.
The cylinder assembly can now be slowly lowered to the
ground by unwrapping the rope or twine from the 2"x4" wood
at the top of the shredder hopper. Make certain that your feet
are not below the cylinder assembly as you unfasten the
rope. Now tilt the main frame back and roll it away from the
cylinder assembly.
ACAUTION
When handling the cylinder assembly, be careful to
avoid contacting the chipper blade that is located
on the chipper flywheel.
The chipper blade is extremely sharp and can cause
personal injury.
STEP 19.
It is not necessary to remove the bearing from the engine
side of the main frame unless it needs replacement (see
"Inspection of Parts" below). To remove the bearing and its
f1angettes, follow the same procedures given in Steps 15 and
16.
INSPECTION OF PARTS
Before reinstalling the following parts, inspect them for wear
or damage as described below.
1. BEARINGS:
A. Inner sleeve should turn freely. If action is rough, replace
bearing.
B. Inner sleeve should feel secure inside outer race. If loose,
replace bearing.
C. Keep bearings clean until reassembly.
2. DRIVE SHAFT:
A.
Inspect shaft for excessive wear (especially in bearing
areas), or cracks. Replace shaft if excessively worn or cracked.
B. Inspect shaft for rust or burrs and remove with emery
cloth.