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Troubleshooting, Adjustment, & Service
Arbor Drive Belt Replacement -
44” & 50” Mowers
NOTE: Be sure to use only genuine Simplicity
replacement parts.
1. Park the tractor on a smooth, level surface such as a
concrete floor. Disengage the PTO, turn off the
engine and lock the parking brake. Remove the key.
2. Remove the mower from the tractor. See Mower
Removal in the Operation section.
3. Remove the capscrews securing the right-hand arbor
cover (B, Figure 43). Remove three capscrews
securing left-hand arbor cover (D).
4. Using a pair of locking pliers or a spring puller,
remove the idler pulley spring (C, Figures 43) from
slot in deck.
5. Loosen capscrew (A, Figure 43) securing the idler
pulley to the bracket. The belt can now be slipped
between the pulley and idler bracket hub.
6. Install a new belt as shown in Figure 44. Make sure
that V-side of belt runs in arbor pulley (A) grooves
and flat side of belt runs against idler pulley (B).
7. Tighten the capscrew (A, Figure 43).
8. Reinstall spring (C, Figures 43) into its slot in mower
deck.
9. Reinstall the left and right arbor covers (B and D,
Figures 43).
10. Install the mower onto the tractor.
FRONT
Figure 44. Mower Deck Drive Belt Routing All Models
A. Arbor Drive Pulley (V-sided)
B. Idler Pulley (Flat-sided)
A
A
A
B
D
B
C
A
Figure 43. Mower Deck - 44" & 50” Mowers
A. Capscrew
B. Right-hand Arbor Cover
C. Spring
D. Left-hand Arbor Cover