Figure 2-11. Circulating in Bar.
Lower spray bar extension to operating position (4, fig. 2-8)
Bar Raising Switch - Down (with control switch in cab or on rear)
Correct spray cannot be obtained unless bitumen is heated to proper spraying temperature. Cold bitumen
will not give sharp spray edges and will cause streaking.
excessive fogging of spray. If higher pump and truck speeds are desired, use larger nozzles. Lower
pump speeds will cause fan spray to sag, with heavy edge
Nozzle slot should make an angle of approximately 30 degrees with bar centerline and every nozzle
Nozzle height of 12 in. above road will give triple lap coverage.
Drain and flush out pump, bar, and circulating system after each day's use, unless oil that will not set up
when cold is used.