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Section 3: Adjustments
Belt Tension Adjustment
!
CAUTION
Belt drive system under spring tension; use care to avoid
bodily harm!
!
WARNING
Excessive tension on the belt may lead to premature failure of
belt and drive components. Excessive tension on the belt may
also lead to a safety hazard to the operator or bystanders.
The Belt tension should be checked after the first 20
hours of use and every 40 hours thereafter.
Refer to Figure 3-3:
1. Check belt tension by applying approximately 22
pounds of pressure half way between the pulleys.
The belt should deflect approximately 3/8".
2. Belt tension can be adjusted at the belt tension bolt.
Turn belt tension bolt until desired belt tension is
achieved.
3. Loosen gearbox mounting bolts and move gearbox
until mower driveline is running straight (parallel)
with the Flail Mower. Retighten mounting bolts to the
correct torque. Refer to "Torque Values Chart for
Common Bolt Sizes" on page 26.
IMPORTANT: Replace belts if they cannot be
tensioned correctly. Refer to "V-Belt Installation" on
page 19 when replacing belts.
IMPORTANT: Do not over tension belts. Excessive
tension may lead to premature failure of belt and
drive components.
Brush Rake Teeth Adjustment
Refer to Figure 3-4:
The FM4188 comes equipped with adjustable brush rake
teeth. The teeth allow continued cutting/chopping of
material before final dispersal. The closer the teeth are
located to the ground the more material they will
accumulate for continued cutting/chopping. Adjust teeth
as follows:
1. Remove hair pin cotter (#1) and raise or lower the
rake tooth (#2) to a new hole location.
2. Replace hair pin cotter (#1) at this new location.
3. Repeat steps 1 & 2 for the remaining rake teeth.
6/24/11
Table of Contents
Belt Tension
Bolt
24865
Gearbox
Mounting
Bolts
Belt Tension Adjustment
Figure 3-3
2
1
Brush Rake Teeth Adjustment
Figure 3-4
FM3188 & FM4188 Flail Mowers 309-523M
24870
17
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