briggs--stratton 5900302 用户手册

Troubleshooting, Adjustment & Service

 1.  Park the tractor 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.  For 61” deck:  Using a 1/2” breaker bar, place 

the square end in the square hole located in the 
end of the idler arm (A, Figure 51).  Carefully 
rotate the breaker bar COUNTER-CLOCKWISE, 
which will relieve the tension on the belt exerted 
from the idler arm.

 2.  For 72” deck:  Using a 3/4” combination 

wrench, place the box end on the nut (A, Figure 
52) securing the idler pulley located in the end 
of the idler arm. Carefully rotate the wrench 
CLOCKWISE, which will relieve the tension on the 
belt exerted from the idler arm.

 3.  Slide the drive belt over the edge of the stationary 

idler pulley (B).  Carefully release the tension on 
the breaker bar or combination wrench until the 
idler arm comes to a stop.

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

Make sure the V-side of the belt runs in the pulley 
grooves (Figure 53).

 5.  For 61” deck:  Install the drive belt on the PTO 

pulley, the spindle pulleys and all idler pulleys 
except the stationary pulley (B, Figure 51).  
Carefully rotate the breaker bar COUNTER-
CLOCKWISE and install the belt on the stationary 
idler pulley (B).  Carefully release the tension on 
the breaker bar.

 5.  For 72” deck: Install the drive belt on the 

PTO pulley, the spindle pulleys and all idler 
pulleys except the stationary pulley (B, Figure 
52). Carefully rotate the combination wrench 
CLOCKWISE and install the belt on the stationairy 
idler pulley (B). Carefully release the tension on 
the combination wrench.

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

5 minutes to break-in the new belt.

Not 

for  

Reproduction