TM 5-4520-208-15
on trailer frame and secure by install-
(6) Remove the tow bar and pin (para
ing two screws (10), lockwashers (9)
and nuts (8).
(7) Remove the springs (para 110).
(2) Install the basket (para 112).
c. Cleaning, Inspection, and Repair.
(1) Clean the trailer frame with an ap-
proved cleaning solvent and dry
115. Trailer Frame
thoroughly.
a. General. The trailer frame, of welded,
(2) Inspect the trailer frame for breaks,
tubular steel construction, affords ease of
cracks, bends, broken welds, or
transportation for the heater.
other damage. Weld all breaks, cracks,
b. Removal.
or broken welds. Replace the trailer
(1) Remove the handle (para 114).
frame if unserviceable.
(2) Remove the duct holders (para 113).
d. Installation
(1) Install the springs (para 110).
Note. Step (9) below, pertains only to
(2) Install the tow bar and pin (para
Model BT400-40 heaters.
(3) Remove four straps (19, fig. 45) and
(3) Position the heater on the trailer
lift heater from trailer frame assem-
frame (pars 11).
bly (21).
Note. Step (4) below pertains only to
Note. Steps (4) and (5) below pertain
Model BT400-40-1 heaters.
only to Model BT400-40-1 heaters.
(4) Secure skid base (26, fig, 39) by in-
(4) Remove four straps (19).
installing eight screws (21 ) and self-
locking nuts (24).
(5) Remove eight screws (21, fig. 39) and
(5) Install four straps (19, fig. 45) to
self-locking nuts (24) securing skid
secure heater to trailer frame.
base (26) to trailer frame assembly
(6) Install the duct holders (para 113).
(21, fig. 46) and lift heater from
(7) Install the handle (para 114).
trailer frame.
81
