40" Mower Arbor Drive Belt Replacement - Simplicity 300 Series Operator's Manual

Troubleshooting, Adjustment, & Service
Figure 46. Mulching Deck (Belt Covers Removed)
A. Idler Assembly Capscrew
B. Spring-Loaded Idler Assembly
C. Belt
D. Square Hole

40" Mower Arbor Drive Belt Replacement

1. With the mower deck installed, park the tractor on a
smooth, level surface such as a concrete floor.
Disengage the PTO, engage the parking brake, shut
the engine off, and remove the key.
2. Remove the mower deck (see "Mower Deck
Removal"). Remove the belt covers.
3. Loosen the idler assembly capscrew (A, Figure 46).
4. Using a ratchet (A, Figure 47), insert the end of the
extension into the square hole (D, Figure 46) and
move the idler assembly (B, Figure 46) to relieve
tension on the belt (C).
5. Remove the belt (C).
6. Install a new belt (C) on the pulleys as shown.
Releasing the idler assembly (A) allows the spring to
automatically tension the cogged belt.
7. Tighten the idler assembly capscrew (A). Reinstall
the belt covers.
8. Check that the blades are positioned perpendicular to
each other (see Figure 48). If not, perform the mower
blade timing procedure found in the Regular
Maintenance section.
D
C
B
A
Figure 47. Release Cogged Belt Tension
A. 3/8" Ratchet and Extension
Figure 48. Mower Blade Timing
42
A