Hobart Welding Products POWERPAK OM-478 - Manual (Page 39)

OM-478 Page 35
8-4. Servicing Engine Fuel And Lubrication Systems
Ref. ST-153 653-A / Ref. ST-184 780-C
Y Stop engine.
1 Fuel Filter
See engine manual for fuel filter re-
placement procedure.
2 Oil Filter
3 Oil Drain
See engine manual for oil change
procedure.
4 Fuel/Water Separator
5 Petcock
To drain water from fuel system, put
metal container under petcock and
open petcock. Close petcock when
fuel appears.
6 Sludge Drain Plug
To drain sludge, put metal container
under drain, and remove plug. Re-
install plug when done.
Close side door.
Tools Needed:
7/16 in
1
2
3
4
5
6
8-5. Adjusting Air Pressure
Ref. ST-153 653-A / Ref. ST-801 325-A / Ref. ST-184 780-C
Governor cut-in pressure is 105 psi
(724 kPa) and cut-out pressure is
125 psi (862 kPa).
.
Cut-in and cut-out pressure
values are
±
5 psi (34 kPa).
Check pressure using air pressure
gauge on front panel. If necessary,
adjust cut-out pressure as follows:
1 Governor
2 Rubber Boot
3 Jam Nut
4 Screw
Remove boot and loosen nut. Turn
screw clockwise (increase pres-
sure) or counterclockwise (de-
crease) until cut-out pressure is
125 psi (862 kPa).
Tighten nut and replace boot.
Tools Needed:
1
2
3
4