TM 10-3510-209-24
2-37. WATER HEATER FUEL PUMP ASSEMBLY (CONT)
INSTALLATION
NOTE
Replacement fuel pump may have
pipe plugs installed to protect pump
while in transit or storage. Remove
pipe plugs from replacement pump
and install them on defective pump to
protect it from dirt and foreign
matter.
1.
Install elbows (15), (14), and (13) on fuel pump
(6).
2.
Install plug (12) in elbow (11) and install elbow in
fuel pump (6).
3.
Install coupling (9) and bushing (10) on shaft of
fuel pump (6) and secure with setscrew (8).
4.
Install fuel pump (6) on shutter assembly (7) and secure with two lockwashers (5) and screws (4).
5.
Connect hose (3) to elbow (15).
6.
Connect fuel line (2) to elbow (14).
7.
Connect hose (1) to elbow (13).
ADJUSTMENT
1.
Turn
on
load
limit
switch
(refer
to
TM 10-3510-209-10) and inspect water heater
for normal operation. Check for fuel leaks and
tighten any connection where leaks occur.
2.
Remove acorn nut (37) and gasket (38) from
side of fuel pump.
3.
Turn fuel pressure adjust screw (42) clockwise
to increase and counterclockwise to decrease
fuel pump pressure. Adjust until pressure gage
(46) indicates 75 to 80 psi (517 to 552 kPa).
4.
Install gasket (38) and acorn nut (37) on fuel
pump.
5.
Turn off power limit switch.
NOTE
FOLLOW-ON MAINTENANCE:
Install
tarp
assembly
(TM 10-3510-209-10).
2-134
