Proheat X45–School Bus - Manual (Page 118)

© 1995 Marine Canada Acquisition Inc. DBA SEASTAR SOLUTIONS 3831 No. 6 Road, Richmond, B.C. Canada V6V 1P6 Tel: 604.270.6899 Web: www.proheat.com
SER VICE BULLETIN
Copy Part# SB0062, Rev. A, 09/2011 Page 3 of 6
2. Remove the spring and brass ball guide from the cavity.
3. Carefully separate and discard the brass ball guide from the
pressure relief valve spring. DO NOT stretch or damage the
spring.
4. Remove the ball bearing from the cavity.
5. Inspect and clean all components.
6. Inspect and clean the cavity. Pay close attention to the
center hole in the cavity for any debris or a damaged edge.
The edge of the hole should be smooth with no nicks, do
not use any tool that may damage the edge as this will
cause loss of fuel pressure.
7. Place ball bearing back in cavity on the center hole.
8. Place spring back in hole on top of ball bearing.
9. Lubricate O-ring with diesel fuel.
10. Install pressure relief valve cap and torque relief valve to
22 ±2 in-lbs (2.5 ±0.2 Nm)
11. Re-test the fuel pressure.
12. If fuel pressure is still above 10 PSI replace relief valve
assembly or fuel pump assembly.
If reading is BELOW 5 PSI
Figure E.
INLET FITTING
ADAPTER
LUBRICATE O-RING
WITH DIESEL FUEL
TORQUE ADAPTER
NUT TO 15 ±10 IN-LBS
(17 ±1.1 NM)
O-RING
FUEL FILTER
FUEL PUMP
COMPRESSOR
1. Check that there is fuel in the fuel tank.
2. Check the fuel filter for contamination.