Proheat Teleflex X45 Reference manual

FUEL PUMP PRESSURE
CHECK AND SERVICE
Instructions 1. Disconnect power to heater.
2. Remove air compressor hose to ensure heater will not run in
full output during test.
3. Remove fuel outlet hose from fuel pump.
Figure A.
To avoid the risk of shock, ensure
to disconnect power to heater unit
during disassembly/reassembly.
WARNING
4. Remove ‘T’ fitting from test gauge PK0060.
3
2AIR COMPRESSOR HOSE
FUEL OUTLET HOSE
4
TEST GUAGE
PK0060K
‘T’ FITTING
Figure B.
Fire Hazard. DO NOT place any
flammable items around the heater
and exhaust pipe.
WARNING
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SERVICE BULLETIN

5. Install test gauge PK0060 on fuel pump outlet.
Calibrate gauge before each use see
www.proheat.com/PDFs/990614.pdf
for more information.
NOTICE
Figure C.
5
TEST GUAGE
PK0060K
IF READING IS ABOVE 10 PSI 1. Locate the pressure relief valve cap and remove with a slot
screwdriver. Be careful not to lose any of the
internal components
that may fall out.
It is normal to get a Start Error Code 1
or a Flame out Code 2 during the test.
The Compressor/Fuel pump motor
will only run for the first 60 seconds
during this test. See Service
Manual for operating sequence.
NOTICE
CAP
BRASS
BALL
GUIDE
BALL
BEARING
SPRING
O-RING
RELIEF
VALVE
ASSEMBLY
FUEL PUMP
COMPRESSOR
Figure D.
6. Switch the PROHEAT on and read the fuel pressure on test gauge.
A reading of 5 – 10 PSI is normal and no further action is required.
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SERVICE BULLETIN

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
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 1. Check that there is fuel in the fuel tank.
2. Check the fuel filter for contamination.
Figure E.
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3. Check fuel lines, connections and routing back to the fuel
tank for kinks, loose fittings, stiff lines or cuts.
FUEL LINE
FUEL
PICK-UP
GROMMET
FUEL TANK
HOSE
CLAMP
FUEL LINE
HOSE CLAMP
Figure F.
4. Check pressure relief valve. Locate the pressure relief valve
cap and remove with a slot screwdriver. Be careful not to lose
any of the internal components that may fall out.
5. Remove the spring and brass ball guide from the cavity.
6. Remove the ball bearing from the cavity.
Figure G.
CAP
BRASS
BALL
GUIDE
BALL
BEARING
SPRING
O-RING
RELIEF
VALVE
ASSEMBLY
FUEL PUMP
COMPRESSOR
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SERVICE BULLETIN

7. Inspect and clean all components.
8. 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.
9. Place ball bearing back in cavity on the center hole.
10. Place spring back in hole with brass ball guide on top of ball
bearing.
11. Lubricate O-ring with diesel fuel.
12. Install pressure relief valve cap and torque relief valve to
22 ±2 in-lbs (2.5 ±0.2 Nm)
13. Re-test the fuel pressure.
14. If fuel pressure is still below 5 PSI replace relief valve or fuel
pump assembly.
Reassembly 1. Remove test gauge PK0060K.
Figure H.
1
TEST GUAGE
PK0060K
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SERVICE BULLETIN

Figure I.
2
3AIR COMPRESSOR HOSE
FUEL OUTLET HOSE
2. Reconnect fuel line to fuel pump outlet.
3. Reconnect air hose at compressor.
4. Run heater for a full cycle and inspect for proper operation.
Copy Part# SB0062, Rev. B, 09/2014 Page 6 of 6
© 2011 Marine Canada Acquisition Inc. DBA SEASTAR SOLUTIONS 3831 No. 6 Road, Richmond, B.C. Canada V6V 1P6 Tel: [phone] Web: www.proheat.com
SERVICE BULLETIN