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Secondary Wheel Traction Adjustment
Perform
this procedure
if the
"Initial Wheel Traction
Adjustment"
did not return wheel
drive to your mower.
This proce-
dure should provide the proper
gap adjustment
between the fric-
tion drive disc and the wheel drive
pulley. If this procedure
does not
result in satisfactory
performance,
please contact the factory or your
local authorized
mower dealer for
further assistance.
A. Stop the engine and wait for
all moving parts to stop.
Disconnect
the spark plug wire
and move it away from the spark
plug. Remove
the ignition key on
electric start models.
B. Park the mower on a firm, level
surface.
C. Put the Wheel Drive Lever (or
the Wheel Drive Control
Bar on
Models 34311 and 34328) in the
DISENGAGE
position.
D. Using two 1/2-inch wrenches,
loosen the wheel drive cable
adjustment
nuts (A and B) that are
shown in Figure 5-4 or Figure 5-5.
E. Unthread
the lower nut (B) a
total of six full turns.
E Thread the upper nut (A) down
until the upper nut and the lower
nut (B) touch the cable bracket.
G. Remove the front deck cover.
H. Temporarily
install one of the
front deck cover Phillips screws
into the spring retaining bracket
(H, Figure 5-6).
I. Gently pull the carrier arm (G,
Figure 5-7) toward the front of the
mower and release the arm.
J. Using two wrenches,
tighten
both cable adjustment nuts (Figure
5-4 or Figure 5-5) against the
bracket.
K. On all models except the single
speed models, put the Wheel
Speed Adjustment
Knob in speed
setting No. 3.
L. Adjust the gap between the
underside
of the drive pulley (A,
Figure 5-7 and the topmost edge of
the rubber-rimmed
drive disc (B)
as follows:
NOTE:
You will need a 1" x 4"
strip of thin paper (notebook
or
stationery
type) to properly
adjust
the gap.
(1.) Remove the plastic thread
protector
(C, Figure 5-7).
(2.) Hold the adjustment
nut (D,
Figure 5-7) with a 7/8" wrench
and loosen the pal nut (E) 1 to
2 turns with a 3/4" wrench.
IMPORTANT:
In the next step,
do not overtighten
the drive
pulley
against
the rubber
drive
disc.
It is only required
that the
drive
pulley gently presses
against
the drive
disc.
(3.) Hold the sleeve nut (F) with a
7/8" wrench
and slowly turn
the adjustment
nut (D) down
(clockwise)
1/4 turn. From
the right side (right side as
viewed in Figure 5-7) try to
insert the strip of paper
between the drive pulley (A)
and the topmost edge of the
drive disc (B). If the paper
will not fit (disc is touching
pulley), go on to step 4.
If the paper fits between
the
pulley and disc, continue
to
slowly turn the adjustment
nut
downward
(maximum
1/4 turn
at a time) until the paper will
not fit. Do not overtighten
the
pulley against the disc.
(4.) As shown in Figure 5-8, use
chalk or a pencil to put a start-
ing mark on the top of the
pulley, directly opposite
one
of the six "flats" (sides) on the
adjustment
nut. Then, hold
the sleeve nut (F, Figure 5-7)
with a 7/8" wrench and
turn the adjustment
nut
upward (counterclockwise)
a
total of two "flats" from this
starting point.
This should
result in a visible gap (0.015"),
between
the drive pulley and
the friction disc. Check that
you can see this gap between
the pulley and the disc.
(5.) Using wrenches,
prevent the
adjustment
nut (D) from turn-
ing and securely tighten the
pal nut (E) in a clockwise
direction.
(6.) Return to the cable adjustment
nuts (Figures 5-4 or 5-5) and
unthread
the upper nut (A) 2
to 3 full turns.
Tighten the
upper and lower nuts securely
against the cable bracket.
(7.) Put the Wheel Drive Lever (or
Wheel Drive Control Bar) in
the DISENGAGE
position,
lift
the front of the mower, and try
to rotate the front wheels by
hand.
They should turn. If
the wheels do not turn, thread
the upper and lower adjust-
ment nuts (Figures
5-4 or 5-5)
downward
2 to 3 full turns.
Repeat this step as needed
until the wheels turn.
Figure 5-6: Use cover screw to
temporarily hold spring retaining
bracket in place.
32
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