Tail-Wheel Height Adjustment; Belts And Sheaves (Fmx Models); Belt Tension (Fmx Models); Sheaves (Fmx Models) - Priefert FMX Operator's Manual

Section 2: Adjustments
Tail-Wheel Height Adjustment (RMS, RMX, RMH Models)
Refer to Figure 2-5:
If deck slope is slightly lower at the front than at the back, and cutting
height is not at the desired height, then the tail-wheel must be adjusted
up or down as follows:
1. Use tractor's 3-point hydraulic control to lift cutter until the tail-wheel
clears the ground. Remove carriage bolt and flange nut.
2. Adjust tail-wheel as follows:
3. To lower cutting height, adjust tail-wheel up.
4. To increase cutting height, adjust tail-wheel down.
5. With Tail wheel adjusted to the correct height, replace long carriage bolt
and flange nut. Tighten flange nut to the correct torque.
Readjust tractor's lower 3-point arm height as needed.
See "Deck Mowing Height" on previous page.
Figure 2-5—Tail-Wheel Height

Belts and Sheaves (FMX Models)

Refer to Figure 2-6
Belts
Ideal tension is the lowest tension at which the belt will not slip under
peak load conditions. Checking the tension during the first 24-48 hours
of run-in operation will lengthen the life of the belts.
Check belts before each use to keep the belts free from foreign material
which may cause slipping.
For maximum service, replace belts with a complete new set of belts to
maintain even tension on both sides. Never install a used belt as a
replacement unit of a set. Used belts are worn in cross-sections and are
stretched this will cause the belt to ride lower in the sheave, reduce
blade speed and may rupture the core centers causing the other belt to
elongate leaving one side of the mower under-belted. Belts from other
manufacturers should not be mixed for the same reasons.

Belt Tension (FMX Models)

1. To check tension, apply 7-10 lbs of pressure by pushing against
the belts halfway between the pulleys. The belt deflection should
be between 5/16" - 1/2".
2. To adjust belt tension, loosen the (4) nuts holding the gearbox
support plate to the central plate (A). (Figure 2-6a)
3. Loosen the (2) locking nuts on the adjustment bolt (B).
4. Turn the adjustment bolt counter clockwise until the proper belt
tension is reached. This will draw the gearbox support plate to the
rear, thus tightening the belts.
5. Tighten the (2) locking nuts on the adjustment bolt (B).
6. Tighten the (4) nuts holding the gear box support to the central
plate (A).

Sheaves (FMX Models)

Check the condition of the sheaves before installing new belts. Rusty
or worn sheaves impairs the drive's efficiency and will abrade the belts
prematurely. If the grooves are worn to where the belt bottoms, slip-
page may result and burn the belts. If the sidewalls are "dished out,"
the bottom shoulder wears off the bottom edge of the belt.
When replacing belts, ensure that the drive is shortened enough until
the belts can be put on the sheaves without forcing. Forcing belts may
cause internal damage to the belts and shorten belt life.
Figure 2-6 Belt Tensioning
Figure 2-6a Adjustment Nuts
A
B
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