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S150X 21HP, 23HP, 25HP & 27HP - 48” & 52” Mower Deck
10/2007 11
TP 300-7343-A-M1-SP
Check Deck Drive Belt
1. Lower the mower deck to its lowest cutting position.
2. Remove the mower deck guards.
3. Make sure the V-side of the belt runs in the pulley
grooves (Figures 20).
4. If the belt is not properly seated, use a 1/2” breaker
bar, and place the square end in the square hole
located in the end of the idler arm (A, Figure 21).
Carefully rotate the breaker bar counter clockwise,
which will relieve the tension on the belt exerted from
the idler arm.
5. Re-seat belt and carefully release the tension on the
breaker bar.
6. Reinstall the mower deck guards.
Figure 20. Mower PTO Belt Routing
A. Spindle Pulley
B. PTO Drive Belt
C. Spring-loaded Idler Pulley
D. Stationary Idler Pulley
WARNING
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 if the breaker bar is prematurely
released while the spring is under tension.
B
C
D
A
A
A
D
Figure 21. Mower PTO Belt
A. Spring-loaded Idler
B. Stationary Idler Pulley
A
B
B