Mower Belt Replacement - Briggs & Stratton SnapperPRO S800X Series Operator's Manual

Maintenance

Mower Belt Replacement

NOTICE
To avoid damaging belts, do NOT pry belts over pulleys.
1. Park the tractor on a smooth, level surface such as a
concrete floor. Disengage the PTO, engage the parking
brake, turn off the engine, and remove the ignition key.
2. Lower the mower deck to its lowest cutting position and
remove the mower deck guards.
WARNING
Spring loaded components can kick back
causing injury.
Use extreme caution when rotating the idler arm with the
breaker bar, due to the increased tension in the spring
as the idler arm is being rotated. Injury may result in
the breaker bar is prematurely release while the spring is
under tension.
3. Using a 1/2" breaker bar, place the square end in the
square hole located in the end of the idler arm (A,
Figures 52). Carefully rotate the breaker bar COUNTER-
CLOCKWISE, which will relieve the tension on the belt
exerted from the idler arm.
4. Slide the drive belt over the edge of the right side
stationary idler pulley (B). Carefully release the tension
on the breaker bar.
5. Remove the old belt and replace with a new one. Make
sure the V-side of the belt runs in the pulley grooves.
6. Install the drive belt on the gear box pulley, the spindle
pulleys and all idler pulleys except the stationary
pulley (B). Carefully rotate the breaker bar COUNTER-
CLOCKWISE and install the belt on the stationary idler
pulley (B). Carefully release the tension on the breaker
bar.
7. Reinstall the mower deck guards.
8. Run the mower under no-load condition for about 5
minutes to break-in the new belt.
Check the Mower Belt Idler Tensioning Spring
Length (72" Models Only)
1. Remove the mower deck guards.
2. Set the mower deck to the 3-1/2" (8.9 cm) cutting
height.
3. Measure the coil length (A, Figure 53) of the mower belt
idler tensioning spring (B). The measurement should
equal 7-1/4" ± 1/8" (18.42 cm ± .32 cm). If not, perform
the Adjust the Mower Belt Idler Tensioning Spring
Length.
46
A
D
C
B
Figure 52. Mower PTO Belt
A. Idler Arm
B. Stationary Idler Pulley
C. Deck Drive Belt
D. Spindle Pulley
E. Gearbox Pulley
A
D
E
Figure 53. Mower Belt Idler Tensioning Spring (72" Models)
A. Coil Length
B. Idler Tensioning Spring
C. Jam Nut
D. Eye Bolt
E. Adjustment Nut
Adjust the Mower Belt Idler Tensioning Spring
Length (72" Models Only)
1. Loosen the jam nut (C, Figure 53) on the eye bolt (D).
2. Turn the adjustment nut (E) until the measurement
equals 7-1/4" ± 1/8" (18.42 cm ± .32 cm).
3. Re-tighten the jam nut.
4. Re-install the mower deck guards.
5. Run the mower under no-load condition for about five
(5) minutes to break in the new belt.
E
D
D
B
B
C
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