Table 3-2 Troubleshooting

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TM 10-3510-208-12

Table 3-2 Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. WATER HEATER FUEL PUMP FAILS TO DELIVER FUEL

Step 1. Check for loose fuel lines.

Tighten loose fuel lines.

Step 2. Check the fuel pump strainer for clogging.

Service the water heater fuel pump strainer as follows:

a. Remove six mounting screws (1, fig. 33) on fuel filter.

b. Remove fuel filter sump and cartridge disk (2).

Clean all parts in a well-ventilated area. Avoid inhalation of solvent fumes and prolonged exposure

of skin to cleaning solvent. Wash exposed skin thoroughly. Dry cleaning solvent (Fed. Spec. P-

D-680) used to clean parts is potentially dangerous to personnel and property. Do not use near open

flame or excessive heat. Flash point of solvent is 100 to 138F. (38 to 59C).

Clean cartridge disk with cleaning solvent, Fed. Spec. P-D-680, and dry thoroughly.

d. Install cartridge disk and fuel filter sump (2) (fig. 3-3) and secure with six screws (l).

e. Remove eight mounting screws (3, fig. 3-3) on fuel pump (4).

Clean all parts in a well-ventilated area. Avoid inhalation of solvent fumes and prolonged exposure

of skin to cleaning solvent.. Wash exposed skin thoroughly. Dry cleaning solvent (Fed. Spec. P-

D-680) used to clean parts is potentially dangerous to personnel and property. Do not use near open

flame or excessive heat. Flash point of solvent is 100 to 138F. (38 to 59C.).

f. Remove strainer and gasket and clean strainer with cleaning solvent, Fed. Spec. P-D -680, and dry

thoroughly.

g. Install strainer and new gasket and secure with eight mounting screws (3, fig. 3-3).

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