briggs--stratton 5900302 用户手册

Troubleshooting, Adjustment & Service

 1.  Disengage the PTO, stop the engine, block the 

front wheels, remove the ignition key, and engage 
the parking brake.

 2.  Locate the upper brake spring (A, Figure 34).

 3.  With the parking brake engaged, measure the 

compressed spring length.  The spring should be 
2” to   2-1/8” (5,0 - 5,4 cm) when compressed.

 4.  If the spring is not within this range, jack up the 

rear of the machine and secure with jackstands.  
Remove both drive tires.

 5.   Locate the lower brake spring and adjustment 

clevis (A & B, Figure 35).

 6.  Release the parking brake and disconnect the 

clevis (B) from the caliper lever (C).  Turn the 
clevis to compress or release the upper spring.  
Lock the nut against the clevis and reinstall the 
clevis onto the caliper lever.

To determine if it is necessary to adjust the neutral 
return, perform the following steps.

 1.  Disengage the PTO, engage the parking brake 

and turn off the engine.

 2.  Move the ground speed control levers into the 

operating position, pull levers rearward and 
release.

 3.  Move the ground speed control levers towards the 

neutral position.  If the levers do not align with the 
notches in the neutral lock plate, it is necessary to 
adjust the neutral return rod (C, Figure 33).

 1.  Loosen the jam nut (B) locked against the ball 

joint (A).

 2.  Turn the neutral return rod (C) to adjust handle 

position (see Figure 33).

 3.  Pull lever rearward and release to check position 

again.  Adjust as necessary to align levers with 
notches.

 4.  Once the lever alignment has been adjusted, lock 

jam nut against the ball joint.

Not 

for  

Reproduction