Briggs & Stratton Vanguard Diesel 432447 Operating & Maintenance Instructions page 16

MAINTENANCE
FAN BELT
Check condition of fan belt.
Replace if damaged or worn.
To check for correct fan belt tension
When 22 lbs. (10 kg) of force is pressed at center of span
between fan and alternator, there should be 3/8 – 1/2 in.
(10 to 12 mm) of belt movement.
To adjust for correct tension
[1]. Loosen the 2 bolts (
[2]. Place a handle (or similar object) between the
alternator and engine cylinder block. Then move the
alternator towards the outside of the engine, until the
fan belt deflection conforms to the specified value.
Specified fan belt deflection:
3/8 to 1/2 in. / 22 lbs. (10 to 12 mm / 10 kg)
[3]. Temporarily tighten the 2 bolts (
alternator. Then remove the handle. Check fan belt
deflection. If it is within specifications, permanently
tighten the 2 bolts (
A
repeat the above adjustment procedure.
Specified tightening torque:
: 170 in-lbs (195 kg-cm)
A
: 45 ft-lbs (622 kg-cm)
B
Check the fan belt deflection again.
SPARK ARRESTOR
If engine muffler is equipped with spark arrestor screen
assembly, remove for cleaning and inspection every 50
hours. Replace if damaged.
and ).
A B
and ) to fix the
A B
and ) as given below. If not,
B
3/8 – 1/2 Inch
(10 – 12 mm)
BELT MOVEMENT
3/8 – 1/2 Inch
(10 – 12 mm)
BELT MOVEMENT
16
BELT
HANDLE
BELT
A
B