49
ASPHAL
T OPERA
TIONS
Asphalt Operations
WARNING
To prevent possible burns from material
overflow, allow sufficient space in the tank
for expansion of the material when heating.
T
o prevent an explosion or fire hazard,
keep burning cigarettes or other sources
of combustion away from manholes and
overflow vents.
To prevent burns, always wear insulated
gloves when handling spray bar sections
or hoses.
Depending on material viscosity, as the
loading rate is increased, the asphalt
pump may cavitate. When this happens,
the pump will make a distinctive sound,
easily recognized with experience. Short
periods of operation while the pump is
cavitating will not damage the pump but
you should not operate the pump in this
condition for extended periods.
Higher pump speeds will not load thicker
materials faster. Lighter materials, or heavy
materials which are already at spraying
temperature, may be loaded at faster rates.
CAUTION
OFF
Handspray Valve Position
Return
Valve
Open
Hand Spray
Valve
Closed
4 Way Valve
Tank
Valve
Closed
Master
Handspray
Valves Off
Transfer Valve
Closed
Transfer Line
Suck Back Valve
Closed
Flush Valve
Closed
Suck Back
Valve
Closed
Transfer Line cap
on and secured
Do not remove Load Line cap if
front or rear tank valve is open
LOAD
(Keyway in
12 o’clock
position)
Figure 66 - Valve Positions for Loading Through the Load Line
