Proheat Teleflex X45 Referenzhandbuch

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.

2AIR COMPRESSOR HOSE

FUEL OUTLET HOSE

TEST GUAGE

PK0060K

‘T’ FITTING

Figure B.

Fire Hazard. DO NOT place any

flammable items around the heater

and exhaust pipe.

WARNING

Copy Part# SB0062, Rev. B, 09/2014 Page 1 of 6

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.

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.

Copy Part# SB0062, Rev. B, 09/2014 Page 2 of 6

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.

Copy Part# SB0062, Rev. B, 09/2014 Page 3 of 6

SERVICE BULLETIN

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

Copy Part# SB0062, Rev. B, 09/2014 Page 4 of 6

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.

TEST GUAGE

PK0060K

Copy Part# SB0062, Rev. B, 09/2014 Page 5 of 6

SERVICE BULLETIN

Figure I.

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

SERVICE BULLETIN

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