TM55-2840-251-23
8-3
OIL-TO-FUEL HEATER (Continued)
8-3-3 INSTALLATION
1.
If replacement heater is to be installed, proceed as
follows:
a.
Coat new preformed packing (9) and packing
retainer (8) and threads of elbow (7) and locknut (6) with
Petroleum (E.20).
b.
Install packing retainer (8) in recess of
locknut (6) and screw locknut onto elbow (7). Install
preformed packing (9) into recess on threaded portion of
elbow (7).
c.
Install elbow into fuel output port of fuel
heater (4) and screw in until preformed packing contacts
port face. Hold nut stationary and turn elbow one and
one-half turns inwards. Position elbow for correct
alignment with fuel output hose connection (1). Hold
elbow stationary and torque locknut to 145 to 155 inch-
pounds and lockwire (E.5).
2.
Install new preformed packings (5) and (11) in
large and small diameter grooves of packing transfer
tubes (10), respectively. Install tubes into ports of fuel
heater (4), large diameter leading.
3.
Carefully install fuel heater and transfer tubes onto
mounting bracket (13), locating tubes in bracket port
housing ports. Secure with three plain washers (3) and
bolts (2). Torque bolts (2) to 32 to 35 inch-pounds and
lockwire (E.5).
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