S
ection
6 — M
aintenance
& a
djuStMentS
35
1.
Measure the width of the outside edge of the disc as shown
in Figure 6-18. Replace the disc before the rubber edge
wears to a thickness of 1⁄8” or less. Failure to do so could
cause the steel underneath the rubber to damage the
transmission pulley.
Disc Edge
Figure 6-18
2.
Look for big cracks or missing chunks of rubber from
the disc. If so damaged, the disc should be replaced
immediately. See the Service section of this manual for
instructions on replacing the disc.
NOTE:
Extend the life of the reverse disc by always pausing
in NEUTRAL before shifting between FORWARD and
REVERSE. Also, the reverse disc is not suited for continuous
or sustained reverse operation. Use reverse sparingly.
Checking and Adjusting the Reverse Drive System
When the Wheels/Tines/PTO Drive Lever is moved up into
REVERSE, the engine and engine mount move down to press on
the reverse adjustment bolt. See Figure 6-19.
Switch Body
Adjustment Bolt
Spring and Plunger
Figure 6-19
This action compresses the reverse spring and plunger assembly,
requiring you to hold the lever up in REVERSE. When you release
the lever, the spring automatically pushes the lever back into
NEUTRAL position.
The spring and plunger assembly is designed to prevent the
reverse disc from making contact with the transmission pulley
until you shift into REVERSE. When the lever is in NEUTRAL, the
switch body on the bottom of the engine mount tab should
be resting squarely on top of the reverse adjustment bolt. See
Figure 6-19. The reverse adjustment bolt can be adjusted up or
down to correct a number of reverse drive operating problems,
as explained next.
Checking and Adjusting the Reverse Disc
1.
Verify that the linkages for Wheels/Tines/PTO Drive
Lever are lubricated with oil and engine mount bars and
belt adjustment block are lubricated with grease. See
Lubrication earlier in this section.
2.
Place Wheels/Tines/PTO Drive Lever in NEUTRAL. Briefly
pull out the engine recoil starter handle while watching the
reverse disc. The disc should turn, but lower pulley should
not. See Figure 6-20. If the reverse disc turns the lower
pulley, or if it is located closer than 3⁄16” to the pulley, reverse
adjustment bolt should be adjusted upward. Moving the
adjustment bolt upward will also solve the problem of a
tiller that goes into REVERSE on its own.
Recoil Starter Handle
Reverse
Disc
Figure 6-20
Summary of Contents for Big Red
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