Check Drive Belt Tension - Land Pride FM2548 Operator's Manual

Section 2: Adjustments
Adjust FM2548 Belt Drive Tension
Figure 2-2
Tension FM2548 Drive Belt
Refer to Figure 2-2 & Figure 2-3:

Check Drive Belt Tension

IMPORTANT: Excessive belt tension can damage
drive belt and drive components. Insufficient belt
tension can cause excessive belt slippage, loss of
rotor rpm, and destroy drive belt.
IMPORTANT: Belt tension should be rechecked on
new belts after approximately 20 hours of operation.
1. Shut tractor down properly before dismounting. Refer
to "Tractor Shutdown Procedure" on page 10.
2. Pull back on latch (#6) and open belt guard (#7).
3. Check belt tension by applying force at 1/2 the belt
span (arrow "A") with a tension tester until belt
deflects 1/4". The force required to get this deflection
should be 13 to 14 lbs.
Increase Drive Belt Tension
The gearbox and drive pulley must be adjusted up
equally to maintain drive and driven pulley alignment.
1. Loosen two hex nuts (#1) located inside belt guard
(#7) and four hex nuts (#3) located on both sides of
the gearbox.
2. Loosen upper nut (#4) 3 or more full turns.
3. Adjust drive pulley (#12) up with hex flange lock
nut (#2). Count number of turns locknut (#2) makes
to increase drive belt tension.
4. Adjust lower jam nut (#5) up the same number of
turns locknut (#2) was adjusted to level output
shaft (#10) and align drive and driven belt pulleys.
5. Check belt tension at 1/2 belt span to verify it is
13 to 14 lbs with 1/4" deflection.
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Measure Belt Tension Force at Mid Span
6. If needed, adjust hex flange locknut (#2) and lower
jam nut (#5) up or down equal number of turns until
belt tension of 13 to 14 lbs is achieved.
7. Tighten upper jam nut (#4) against jam nut (#5).
8. Tighten hex nuts (#1 & #4) to the correct torque for
1/2"-13 GR5 bolt.
9. Close belt guard (#7). Make sure latch (#6) is caught
on the belt guard back plate.
Decrease Drive Belt Tension
The gearbox and drive pulley must be adjusted down
equally to maintain drive and driven pulley alignment.
1. Loosen two hex nuts (#1) located inside belt guard
(#7) and four hex nuts (#3) located on both sides of
the gearbox.
2. Loosen upper nut (#4) 3 or more full turns.
3. Adjust drive pulley (#12) down with hex flange lock
nut (#2). Count number of turns locknut (#2) makes
to decrease drive belt tension.
4. Adjust lower jam nut (#5) down the same number of
turns locknut (#2) was adjusted to level output
shaft (#10) and align drive and driven belt pulleys.
5. Check belt tension at 1/2 belt span to verify it is
13 to 14 lbs with 1/4" deflection.
6. If needed, adjust hex flange locknut (#2) and lower
jam nut (#5) up or down equal number of turns until
belt tension of 13 to 14 lbs is achieved.
7. Tighten upper jam nut (#4) against jam nut (#5).
8. Tighten hex nuts (#1 & #4) to the correct torque for
1/2"-13 GR5 bolt.
9. Close belt guard (#7). Make sure latch (#6) is caught
on the belt guard back plate.
FM2548, FM2560, FM2572, & FM2584 Flail Mowers 333-138M
Figure 2-3
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