Marshalltown 800MP Mixer - Manual (Page 12)

IDLER/TENSIONER
Belt tension is preset at the factory, after approximately 40 hours of operation an
adjustment may be necessary to compensate for normal belt stretch. This may be
accomplished by adjusting the linkage rod connected to the idler/tensioner pulley bracket.
IMPORTANT: Do Not over tension the belts, doing so will prevent the clutch from
disengaging power to the paddle shaft. Maintain enough free play in the belts so
that they will slip when the clutch is disengaged.
Periodically check the alignment of all pulleys and gears for proper operation.
There are two belt fingers (upper & lower), the upper is attached to the engine and should
be positioned so that minumum contact exists with the belts near the pinion pulley. The
lower belt finger is attached to the idler pulley, adjust with the idler pulley in the engaged
position, rotate the lower finger so that it makes contact with the main frame tube. Re-
tighten the idler pulley bolt and move the idler pulley to the disengaged position, the
finger should make contact with the belts and provide slack to the drive pulley so that it
may rotate freely. Ref. Figure 4.