TM 10-3510-220-24
2-39.
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 (1), (13), and (15) on
fuel pump (2).
2. Install plug (5) in elbow (14) and
install elbow in fuel pump (2).
3.
Install coupling (6) and bushing (8)
on shaft of fuel pump (2) and secure
with setscrew (7).
4. Install fuel pump (2) on shutter
assembly (9) and secure with two
lockwashers (4) and screws (3).
5. Connect hose (10) to elbow (13).
6. Connect fuel line (11) to elbow (15).
7. Connect hose (12) to elbow (1).
A D J U S T M E N T
1. Turn on load limit switch (refer to
TM 10-3510-220-10) and inspect
water heater for normal operation.
Check for fuel leaks and tighten
any connection where leaks occur.
2. Remove acorn nut (16) and gasket
(17) from side of fuel pump.
3. Turn fuel pressure adjust screw (18)
clockwise to increase and
4.
5.
6.
counterclockwise to decrease fuel
pump pressure. Adjust until
pressure gage (49) indicates 75 to
80 psi (517 to 552 kPa).
Install gasket (17) and acorn nut
(16) on fuel pump.
Turn off power limit switch.
Perform follow-on installation.
Install tarp assembly
(TM 10-3510-220-10).
2-135
