Briggs & Stratton 5900834 ユーザーズマニュアル

Regular Maintenance

 1.  Park the unit 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.  Remove the mower deck guard.

 3.  Remove the PTO drive belt (see PTO DRIVE 

BELT REPLACEMENT for removal instructions).

 4.  Lower the mower deck to its lowest cutting 

position.

 5.  Using a 1/2” breaker bar, place the square end in 

the square hole located in the end of the idler arm 
(A, Figure 48).  Carefully rotate the breaker bar 
COUNTER-CLOCKWISE, which will relieve the 
tension on the belt exerted from the idler arm.

 6.  Slid the mower deck drive belt over the edge of 

the left spindle pulley (B).  Carefully release the 
tension on the breaker bar.

 7.  Remove the old belt and replace with a new one.  

Make sure that the V-side of the belt runs in the 
pulley grooves.

 8.  See Figure 49.  Install the mower deck drive belt 

(A, Figure 49) on the stationary idler pulleys (B), 
the spring-loaded idler pulley (C) and all of the 
spindle pulleys (D) except for the left spindle pulley 
(E).  Carefully rotate the breaker bar COUNTER-
CLOCKWISE and install the belt on the left spindle 
pulley.  Carefully release the tension on the 
breaker bar.

 9.  Reinstall the PTO drive belt (see PTO DRIVE 

BELT REPLACEMENT for re-installation 
instructions).

 10. Reinstall the mower deck guards.

 11. Run the mower under no-load condition for about 

5 minutes to break-in the new belt.

To avoid damaging belts, DO NOT pry belts over 
pulleys.

Not 

for  

Reproduction