Checking And Replacing Engine Belt; Servicing Optional Spark Arrestor - Miller Air Pak Owner's Manual

8-8. Checking And Replacing Engine Belt

Tools Needed:
1/2 in, 13 mm, 17mm

8-9. Servicing Optional Spark Arrestor

Tools Needed:
3/8 in
OM-478 Page 38
1
1/2 in (13 mm)
Maximum
3
1
2
Y Stop engine.
A V-belt drives the engine cooling
fan and alternator. To check
tightness of belt, proceed as
follows:
Remove rear panel and guard from
engine pulley.
1 Fan Pulley
2 Alternator Pulley
3 Engine Belt
Position straight edge along top of
pulleys. Pull down belt as far as it
will go, and measure distance from
belt to straight edge.
2
If less than 1/2 in (13 mm), belt is
okay. If not okay, adjust belt as
follows:
4 Alternator Bracket
Loosen hex nut on bracket.
5 Alternator Pivot Hex Nut
Loosen hex nut. Pivot alternator
4
clockwise until belt is tight. Tighten
hex nuts.
5
Recheck tightness of belt. Readjust
if necessary.
Replace belt if damaged
cracked. Replace belt as follows:
3
Loosen hex nuts, pivot alternator
counterclockwise, and
belt. Install new belt, pivot alternator
clockwise, adjust tightness, and
tighten hex nuts. Recheck tight-
ness of belt after operating engine
15 minutes.
Reinstall guard and rear panel.
Ref. ST-121 577-B / Ref. ST-184 781-A
Y Stop engine and let cool.
1 Spark Arrestor
2 Cleanout Plug
Remove plug and remove any dirt
covering cleanout hole.
3 Exhaust Pipe
Start engine, and run at idle speed
to blow dirt out cleanout hole. If
nothing blows out of hole, briefly
cover end of exhaust pipe.
Y Stop engine and let cool.
Reinstall cleanout plug.
ST-157 313-A / Ref. ST-184 781-A
or
remove