Proheat M80 - Page 24

Fuel Shut-off Valve – Check:
a) Fuel Shut-off Valve and PCM - electrical open circuit fault.
b) Valve plunger – mechanical fault. Test the PROHEAT operation; Fuel
Shut-off Valve plunger removed.
Procedure – Coil and PCM – electrical fault:
a) Disconnect all harnesses at the PCM.
b) Disconnect the fuel supply line.
c) Loosen and back out the burner head mounting (2) bolts five to six turns
allowing enough room to rotate the burner head 15° counter-clockwise
and remove.
d) Remove the Fuel Shut-off Valve connector. Use a small flat head
screwdriver to lift the connector locking tab, pulling up on the
connector to remove.
PROHEAT M-SERIES SERVICE MANUAL
3-8
START: Fuel System Step 4
(1 Flash)
Figure 3-7: PCM Fuel Shut-off Valve Connection
PCM FUEL SHUT-OFF
VALVE CONNECTION
NOTICE
It is recommended that the Fuel
Regulator be serviced at the same
time as the Fuel Shut-off Valve. Go
to page 3-11, Step 5.
Figure 3-5: Burner Head Removal
MOUNTING EARS (2)
MOUNTING BOLTS (2)
TORQUE = 100 in-lbs
COOLANT PUMP
SWITCH INPUT
TEMP SENSOR 1
POWER
FUEL INLET
LOCK
Figure 3-6: Connector Removal