Briggs & Stratton Mower Belt Replacement, 61” Decks, 72” Decks, 61” Decks, 72” Decks, OVER PULLEYS, For 61” Decks:, For 72” Decks:, For 61” Decks:, For 72” Decks:

Regular Maintenance

Mower Belt Replacement	B	A
NOTICE
To avoid damaging belts, DO NOT PRY BELTS
OVER PULLEYS.
1. Park the tractor on a smooth, level surface such as a	B
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	61” Decks
remove the mower deck guards.

WARNING

Use extreme caution when rotating the idler

arm with the breaker bar, due to the increasedC 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.

3.		Reproduction
	For 61” Decks: Using a 1/2” breaker bar, place the		72” Decks
	square end in the square hole located in the end of the
	idler arm (A, Figures 44). Carefully rotate the breaker		Figu e 44. M wer PTO Belt
	bar COUNTER-CLOCKWISE, which will relieve the		A. Idler Arm
	tension on the belt exerted from the idler arm.		B. Stationary Idler Pulley
		Not	C. Nut
	For 72” Decks: Using the 3/4” combination wrench,
	place the box end on the nut (A, Figure 44) that securesfor			B	C
	the idler pulley located at the end of the idler arm.		D
	Carefully roate the wrench CLOCKWISE, which will
	relieve the tension on the belt exerted from the idler
	arm.
4. Slide the drive belt over the edge of the stationa y idler
	pulley (B). Carefully release the tension on the b eaker
	bar or the combination wrench.				A
5.	Remove the old belt and replace with a n w one. Make		A
	sure the V-side of the belt runs in the pull y groov s		D	A
	(Figure 45).		61” Decks
6. For 61” Decks: Install the drive belt on the PTO
	pulley, the spindle pulleys and all idler pulleys except			C
	the stationary pulley (B, Figure 44). Carefully rotate the		D
	breaker bar COUNTER-CLOCKWISE and install the belt
					B
	on the stationary idler pulley (B). Carefully release the
	tension on the breaker bar.
	For 72” Decks: Install the drive belt on the PTO
	pulley, the spindle pulleys and all idler pulleys except
	the stationary pulley (B, Figure 44). Carefully rotate the		A		A
	combination wrench CLOCKWISE and install the belt
	on the stationary idler pulley (B). Carefully release the		D		D
	tension on the combination wrench.			A
7. Reinstall the mower deck guards.			72” Decks

8. Run the mower under no-load condition for about 5

minutes to break-in the new belt.Figure 45. Mower PTO Belt Routing A. Spindle Pulley

B. PTO Drive Belt

C. Spring-loaded Idler Pulley D. Stationary Idler Pulley

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