Troy-Bilt 47329 Owner's Manual page 19

Section 5: Maintenance 19
Before Inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to
come to a complete stop, disconnect spark plug wire and move wire away from spark plug.
Failure to follow these instructions can result in serious personal injury or property damage.
the assembly so one of the roll pins can be
driven out with a punch and a hammer.
2. Carefully inspect the holes in the outer
sleeve. One hole is larger than the other.
Position the sleeve so the roll pin will be
pushed out of the cylinder assembly
through the LARGER hole (it will not pass
through smaller hole). Use penetrating oil
to loosen sleeve if it does not spin easily.
3. Tap the roll pin out of the cylinder pin,
the spacer, and the LARGER hole in the
sleeve with a 5/32" punch and a hammer.
4. Discard the used roll pin. Disassemble
the cylinder pin, spacers and shredder
blades located on the cylinder pin.
5. Rotate the cylinder assembly to access
the remaining cylinder pin assemblies and
repeat the disassembly procedure.
Cylinder Assembly Component Repair
NOTE: Refer to the Parts List pages for
part numbers when ordering cylinder
assembly components.
A
WARNING
Before performing any maintenance on
the unit, stop the engine, wait for ail
moving parts to stop and disconnect
spark plug wire. Wear gloves when
working with the cylinder assembly to
protect against cuts.
1. Flip or rotate the shredder blades as
needed to expose fresh cutting surfaces
(Figure 5-4). Replace the blade if all cut¬
ting surfaces are dull.
2. Replace any spacers or sleeves that are
worn or damaged. Use original equipment
replacements only! See the Parts List for
part numbers when ordering.
3. Thoroughly clean and inspect all parts.
Remove any burrs that could prevent the
parts from fitting properly.
Cylinder Assembly Reassembly
1. Securely clamp the cylinder assembly
by the chipper flywheel in a vise. Position
the assembly to allow reassembly of the
cylinder pins.
2. Slide the correct locking spacer inside
the correct sleeve (refer to the Parts List, if
necessary). Line up the roll pin hole in the
sleeve and the spacer.
3. Carefully inspect the holes in the sleeve
and note that one hole is larger. Use a
pliers to hold a new roll pin (never reuse a
roll pin) and tap it through the LARGE hole
in the sleeve, and into the top hole in the
spacer (Figure 5-5). Tap the roll pin into
the spacer only until it is flush with the
bottom surface of the top hole.
A
WARNING
The cylinder pin rows must be properly
assembled and then secured with new
roll pins before unit is operated.
Failure to follow these instructions
could result in severe injury or property
damage.
4. Feed one cylinder pin into the cylinder
assembly with the correct spacers and
shredder blades in the proper order and
placement. Refer to the Parts List, or to
Figure 5-5A, if you are unsure about the
proper order and placement of the cylinder
assembly parts. Slide the pre-assembled
spacer/sleeve/roll pin assembly onto the
end of the cylinder pin.
5. Rotate the pre-assembled
spacer/sleeve/roll pin assembly until the
hole in the cylinder pin is aligned with the
holes in a spacer and sleeve.
6. Coat the exposed surface of the roll pin
with Loctite® 242 (or equivalent) remov¬
able thread sealant. Allow the sealant to
cure for 24 hours before using the unit.
7. Use a hammer and 5/32" punch to tap
the roll pin into the holes in the cylinder
pin and spacer. Stop when the ends of the
roll pin are flush with the outside edges of
the spacer.
8. The sleeve must spin freely. If it
doesn't spin, check to make sure the roll
pin is not protruding beyond the outside
edges of the spacer.
9. Rotate the cylinder assembly as needed
to reassemble the other cylinder pins and
their component parts.
Cylinder Assembly Installation
1. Insert ends of cylinder shaft through
closure plates on unit. Slide the bearings
onto ends of the cylinder shaft.
2. Lift the cylinder assembly/closure
plate/bearing assembly up into the unit.
Secure the cylinder assembly/closure
plate/bearing assembly to the mainframe
with the six flange screws removed in Step
7 of
Cylinder Assembly Removal.
The four
longer (Grade 8) flange screws and the
5/16" lock washers are installed through
the bearings and closure plates; the two
shorter screws are used with the closure
plates alone. Tighten the screws securely
(if you have a torque wrench, tighten to 30
ft ./lbs).
3. Secure the end of the cylinder shaft
opposite the pulley with the hardware
removed in Step 6 of
Cylinder Assembly
Removal.
Tighten the capscrew securely.
4. Install the locking collar removed in
Step 5 of
Cylinder Assembly Removal,
onto the pulley end bearing on the cylinder
shaft. Lock the collar down by turning the
bearing flange counter-clockwise with a
hammer and punch (Figure 5-3). Apply
Loctite® 242 (or equivalent) removable
thread sealant to the collar set screw.
Tighten the set screw to lock the collar
down against the bearing flange. Allow
the sealant to cure for 24 hours before
using the unit.
5. Assemble the pulley on the cylinder
shaft, using the hex key and all other hard¬
ware removed in Step 4 of
Cylinder
Assembly Removal.
Secure the pulley
(sheave) with the snap ring removed in
that step.
6. Install the drive belt. Make sure the belt
is properly routed under any belt guides (if
equipped). Reinstall the belt cover using
the four screws removed in Step 3 of
Cylinder Assembly Removal.
A
WARNING
Do not operate unit without belt cover in
place. Failure to follow these instruc¬
tions could result in severe personal
injury.