Troy-Bilt 494 - Manual (Page 10)

10
WARNING: Always stop engine, discon-
nect spark plug, and ground against
engine before cleaning, lubricating or
doing any kind of maintenance on your
machine.
Lubrication
Release Rod: Lubricate the release rod and spring with
light oil once a season.
Hopper Assembly: Lubricate the pivot points on the
hopper assembly with light oil once a season.
Discharge Chute: Lubricate the pivot points on the
chute deflector with light oil once a season.
Engine: Follow the separate engine manual packed
with you unit for lubrication instructions.
Maintenance
Engine
Refer to the separate engine manual for all engine
maintenance instructions.
• Check engine oil level before each use as
instructed in the separate engine manual packed
with your unit. Read and follow instructions
carefully.
• Clean air cleaner every 25 hours under normal
conditions or once a season. Clean every few hours
under extremely dusty conditions. To service the air
cleaner, refer to the separate engine manual
packed with your unit.
• The spark plug should be cleaned and the gap
reset once a season. Check engine manual for
correct plug type and gap specifications.
Removing the Flail Screen
If the discharge area becomes clogged, remove the flail
screen and clean area as follows:
• Stop the engine and make certain the chipper
shredder has come to a complete stop.
• Disconnect spark plug wire from spark plug and
ground against the engine.
• Remove the two wing knobs on each side of the
discharge chute and lift the discharge chute up to
keep it out of the way. See Figure 8.
• Remove the two hairpin clips from each clevis pin
which extend through the housing and remove the
pins.
• Remove the flail screen from inside the housing
and clean the screen by scraping or washing with
water.
• Reinstall the screen, making certain to reassemble
the flail screen with the curve side down.
• Reattach the discharge chute with the hardware
previously removed and connect the bag (if
equipped) to unit.
Figure 8
Chipper Blades
• Disconnect the spark plug wire and ground against
the engine.
• Remove the flail screen as instructed in the
previous section.
• Remove the chipper chute by removing three hex
nuts and washers.
• Remove the chipper chute support brace from the
frame by removing the hex bolts.
• Rotate the impeller assembly by hand until you
locate one of the two chipper blades in the chipper
chute opening.
• Remove the blade using a 3/16” allen wrench on
the outside of the blade and an adjustable wrench
on the impeller assembly. See Figure 9.
Figure 9
• Rotate the impeller to expose other blade and
remove in the same manner.
• Replace or sharpen blades.
• When sharpening the blade, protect hands by using
gloves and follow the original angle of grind. Also,
Discharge
Chute
Hairpin
Clips
Wing Knobs
Flat Screw
Blade