Dando TERRIER Mk 1, Operating And Maintenance Manual, Page: 50 / 276

4.7 SERVICE LINE CONNECTIONS
Before carrying out any drilling activities you must ensure that the
service line ball valve is set so that flow is directed through the valve
and into the service line to the drill head and not to bypass.
4.7.1
WATER FLUSH DRILLING
Disconnect the water pump discharge hose from the stowage bracket by
hammering the union in a counter clockwise direction (CCW) until loose then
unscrew by hand, allowing any water to drain out.
Disconnect the air supply hose from the service line connection by
hammering the union in an CCW direction until loose then unscrew by hand.
Stow away by threading the hammer union on to the stowage bracket in a
clockwise direction (CW).
Connect the water pump discharge hose onto the rig service line using the
hammer union connection, first tighten the union by hand in a CW direction
then hammer the union tight.
Connect the suction hose to the water pump by locating the male Bauer
fitting on the hose to the female Bauer fitting on the pump and lock in place.
Prior to making the above connection it is advisable to fill the suction hose
with water to assist in priming the pump.
Ensure suction hose strainer is free from debris before positioning in water
tank or pit.
Remove foam injection hose from the pump by disconnecting the quick
connect coupling.
Activate the pump using the control lever on the drillers panel, then adjust the
flow using the control valve, according to requirements.
4.7.2 AIR/AIR MIST OR AIR/FOAM DRILLING
Disconnect the water pump discharge hose from the service line connection
by hammering the hammer union in a CCW direction until loose then
unscrew by hand.
Disconnect the air hose from the stowage bracket by hammering the union in
an CCW direction until loose then unscrew by hand.
Connect the water pump discharge hose to the stowage bracket by threading
the hammer union in a CW direction onto the blank fitting and hammer tight,
this connection must be water tight .
Connect the air supply hose from the in-line oiler into the service line by
threading the hammer union in a CW direction and hammer tight.