TM 5-3895-368-14&P
g. When all drums are empty, open doors at both
the front and rear of the tunnel. Load new full asphalt
drums in same manner as loading of initial load. Empty
drums will be pushed out the open rear door as full
drums are loaded into the front.
3-3.
Operating Instructions.
a. Perform initial start-up as instructed in
paragraph 3-2.
b. When initial charge of drums is empty, open
doors at both the front and rear of the tunnel. Load new
asphalt drums in same manner as loading of initial load.
Empty drums will be pushed out the rear door as full
drums are loaded into the front.
CAUTION
Do not overload storage tank. The
tank will hold 3000 U.S. gallons.
Keep records of amount loaded and
pumped out, to insure that capacity is
not exceeded.
c. Continue loading the de-drumming tunnel as
required to provide amount of asphalt required for job
application.
CAUTION
Temperature of asphalt must not
exceed
3500
F,
while
operating.
Reduce
temperature
to
300°
F,
during standby operation. Prolonged
operation at temperatures above 350°
F, may result in asphalt Igniting and
burning, which may damage the
melter. Flash point for asphalt is 425-
450° F.
d. Periodically monitor the thermometer, on front
of tank for proper operating temperature range, 235°
±15° F. for asphalt cement rated at 85-100 penetration.
Temperature of asphalt cement in storage tank may be
lowered by adjustment of heat transfer oil gate valves to
restrict flow of hot oil to coils of storage tank. Do not
restrict oil flow to tunnel during de-drumming operations,
maximum heat is desired to shorten melt-down of
asphalt cement.
e. Transfer melted asphalt cement from storage
tank by starting supplied material pump and opening the
asphalt jacketed valve (Figure 3-1). Meter the flow of
asphalt pumped from the tank, so a record can be
maintained of the amount of material in the tank at all
times.
f. When required amount of asphalt has been
melted, close the tunnel inlet gate valve (Figure 3-1).
Push empty drums from the tunnel with barrel ram.
Adjust storage tank inlet and outlet gate valves (Figure 3-
1), as necessary to maintain proper temperature in the
tank.
3-4.
Shutdown Instructions.
a. All melted asphalt cement must be pumped
from the storage tank. Visually check storage tank by
removing front rain shield.
b. When satisfied that all material has been
pumped from storage tank, close the asphalt jacketed
valve (Figure 3-1).
NOTE
Not all material can be removed by
pumping, approximately 1-1/2 to 2
inches of material will remain in the
storage tank c. Disconnect asphalt
flexible hose piping and drain all
material.
d. Shutdown hot oil heater (Refer to heater
instructions.) e. Close all gate valves (Figure 3-1).
3-3 (3-4 Blank)
