Troy-Bilt AutoDrive 604 - Manual (Page 17)

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• Locate the PTO engagement rod and the PTO
adjuster link by looking at the tractor’s
underside. See Figure 12.
• Remove the cotter pin that affixes the lower
end of the PTO engagement rod to the PTO
adjuster link. Save the pin. See Figure 12.
• Take the lower end of the PTO engagement
rod out of the hole in the PTO adjuster link
and move the rod as far back into the
disengaged (OFF) position as possible.
• Thread the PTO adjuster link outward until the
hole in the end of it is aligned with the PTO
engagement rod.
• Reinsert the PTO engagement rod into the
hole in the PTO adjuster link and reinsert the
cotter pin removed earlier (if undamaged).
Figure 12
SECTION 10: MAINTENANCE
WARNING: Disconnect the spark plug
wire(s) and ground against the engine
before performing any adjustments, repairs
or maintenance.
ENGINE
Refer to the separate engine manual for 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.
Changing Engine Oil
• Unscrew oil fill cap and remove dipstick from
the oil fill tube. See Figure 13.
Figure 13
• Pop open the protective cap on the end of the
oil drain valve to expose the oil drain port. See
Figure 13.
• Push oil drain hose (packed with unit) onto the
oil drain port. Route the opposite end of the
hose into an appropriate oil collection
container with a capacity great enough to
collect the used oil.
• Push the oil drain valve in slightly, then rotate
counterclockwise and pull outward to begin
draining oil. See Figure 13.
• Service the oil filter (if so equipped) as
instructed in the separate engine manual
packed with your unit.
Perform the above steps in the opposite order after
oil has finished draining.
• Refill the engine with new motor oil.
IMPORTANT: Refill the engine with the proper
capacity and weight of motor oil as instructed in the
separate engine manual.
Service air cleaner every 25 hours under normal
conditions. Clean every few hours under extremely
dusty condition. To service the air cleaner, refer to
the separate engine manual packed with your unit.
The spark plug(s) should be cleaned and the gap
reset once a season. Spark plug replacement is
recommended at the start of each mowing season;
check engine manual for correct plug type and gap
specifications.
PTO Engagement Rod
Cotter Pin
PTO Adjuster Link
Protective Cap
Oil Drain Hose
Oil Drain Port
Oil Fill Cap
Oil Fill Tube
Oil Drain Valve
Single-cylinder engine shown. NOTE:
Valve location will vary with engine style.