MANUAL 4 - Construction Industry Development Board

MODULE
1
2
3
4
5
6
7
Note
Do not tamper with the relief valve on the bypass.
MANUAL 4 – BITUMINOUS PAVEMENT SEALS
• Never let the tank run dry as this will lead to the engine having to be bled.
• When removing the diesel cap, there is a filter at the tank opening to prevent dirt
entering the tank. Before removing the cap, clean the areas around the cap using a
mutton cloth.
• The storage of the diesel in 210 litre drums must be supervised. Check that the drum
is left in one position (vertically) if a pump is used, or on a stand (slightly tilted away
from the tap) if a tap/valve is used; for decanting into a clean container and allowed to
stand, for at least 24 hours, to allow the sludge to settle.
2.2 Starting the engine/pump
• The sprayer pump is self-priming. However, if the machine has not been used for a
number of weeks, the sprayer pump must be primed.
• This is done by removing the white cone shaped filter and adding just sufficient oil in
the filter cap, so that it will not spill when fixing it in place on the engine.
• Before starting the engine, the intake pipe/sump of the spray machine must be placed
in the 210 litre drum of emulsion, and the control valve on the spray lance must be
open.
• Start the engine by switching it to the on position, opening
the choke and pulling the starter rope. The sprayer pump will
take approximately one minute to prime.
• Once primed, the control valve on the spray lance can be set to
the off position. The engine can be left running as the sprayer
has a built-in, automatic bypass system.
• When there is difficulty in starting the engine in cold weather, remove the rubber cap
on the top of the engine, put ± 5 ml of the oil in the tube and replace the rubber cap.
Figure 4.1: Schematic layout of motorised hand sprayer
IMPLEMENTING EMPLOYMENT INTENSIVE ROAD WORKS 14