Service Manual

CHASSIS
5-71Fixed Deck Mid-Size Service Manual
5
Pistol Grip - Gear Drive
The following inspections should be made when disas-
sembling the drive system, particularly if the reason for
service is inability to adjust belt tension or “loss of drive”.
Be sure to inspect all components; there may be more
than one item needing replacement.
• Pulley fl anges bent or damaged. They can pinch or
cut the belt.
• Idler arm bent - this will push the belt to one side and
can induce belt jumping in reverse.
• Idler pulley bearing worn out, resulting in
inconsistent tension on the belt. Can cause slippage
or jumping.
• A belt contacting the bottom of the pulley “V”
indicates worn belt or pulleys. The belt will slip no
matter how tight you adjust it.
• Belt glazed, shiny or burnt on the sides of the “V”
indicates slipping. Belt must be replaced and the
cause identifi ed and corrected.
• The sides of each pulley sheave should be straight
and fl at. If the sides of the “V” have “opened up”
or appear to bulge the pulley is worn and must be
replaced.
• If the belt is riding too deep in one or both pulley
grooves the center fl ange will begin to cut the belt
into 2 single belts. This indicates a badly worn belt or
pulley. The parts must be replaced.
Fig 642 PICT-5921
57. Hook the idler arm spring to the frame (Fig. 642).
Wheel Drive Belt and Pulley Replacement
Fig 643 IMG-6220a
58. Visually inspect the alignment of the pulleys. As you
look straight down at the three pulleys (transmission,
idler, and wheel) they should all be in line. The trans-
mission pulley can be adjusted slightly either inward
or outward.
Additionally, the idler pulley should be pushed
straight down onto the belt (Fig. 643).