Brake Adjustment; Carburetor Adjustment - Troy-Bilt AutoDrive 604 Operator's Manual

Front tire toe-in can be measured as follows:
• Place the steering wheel in position for
straight ahead travel. Insert a 1/4" dowel up
through aligning holes in both the steering
gear and support plate. See Figure 10.
Drag Links
Insert Dowel
Here
Support
Plate
NOTE:
View shown from beneath tractor.
Figure 10
• In front of the axle, measure the distance
horizontally from the inside of the left rim to
the inside of the right rim. Note the distance.
• Behind the axle, measure the distance
horizontally from the inside of the left rim to
the inside of the right rim. Note the distance.
• The measurement taken in front of the axle
should be between 1/16" and 5/16" less than
the measurement taken behind the axle.
• Adjust if necessary.
• Remove the dowel inserted earlier before
attempting to operate the tractor.

CARBURETOR ADJUSTMENT

WARNING:
made to the engine while the engine is
running (e.g. carburetor), disengage all
clutches and blades. Keep clear of all
moving parts.
surfaces and muffler.
NOTE:
A dirty air cleaner will cause an engine to
run rough. Be certain it is clean and properly
attached before adjusting carburetor. Refer to
separate engine manual packed with your unit for
information regarding air cleaner maintenance.
Refer to separate engine manual packed with your
unit for carburetor adjustment information or see an
authorized engine service dealer.
Steering Gear
Steering
Shaft
If any adjustments
Be careful of heated

BRAKE ADJUSTMENT

If the tractor does not come to a complete stop when
the brake pedal is completely depressed, or if the
tractor's rear wheels can roll with the parking brake
applied, the brake is in need of adjustment. The
brake disc can be found on the right side of the
transmission in the rear of the tractor. Adjust if
necessary as follows:
• Looking at the transmission from the right side
of the tractor, locate the compression spring
and brake disc. See Figure 11.
Set Gap
at .011"
Brake Disc
NOTE:
View shown from beneath tractor.
• Loosen, but do NOT remove, the hex nut
found on the right side of the brake assembly.
See Figure 11.
• Using a feeler gauge, set the gap between the
brake disc and the brake puck at .011".
• Re-tighten the hex nut loosened earlier.
are
PTO (POWER TAKE-OFF) ADJUSTMENT
If your tractor's engine fails to crank when following
the starting instructions found earlier in this manual,
the PTO may be in need of adjustment. With the
PTO lever in the disengaged (OFF) position, the
lever must go back far enough so that a metal tab
that is bolted to the base of the lever can fully
depress a plunger saftey switch mounted to the
tractor's frame beneath the fuel tank. Adjust, if
necessary, as follows:
WARNING:
tractor's cutting deck continue to turn with
the PTO lever in the disengaged (OFF)
postion, stop the tractor immediately and
perform the following steps.
• Turn the tractor's engine off, remove the key
from the ignition switch and apply the tractor's
parking brake.
16
Hex Nut
Compression
Spring
Transmission
Figure 11
If the blades on your