Ditch Witch MR90 - Manual (Page 57)

Handle Fluid - 56
MR90 Operator’s Manual
Recycle Fluid
CMW
®
Recycling Fluid
1. Level screens left to right. See “Screen left/right tilt control” on page 35.
2. Turn shaker on.
3. Turn on cleaning pump and check that hydrocyclones are operating at 30 psi (2.06 bar).
4. Turn on pit pump to supply used mud to shaker screens.
5. Routinely check mud weight and sand content to prevent damage to drill. See page 66.
6. Level screens front to rear. See “Screen front/rear tilt control” on page 35.
Transferring Fluid
1. Connect hose from mixing pump to drilling unit.
2. Open venturi jet valve and drill supply valve.
3. Run engine at full throttle.
IMPORTANT: MR90 tank should be at least half full before turning on cleaning pump.
IMPORTANT: Use auto mode for pit pump to avoid overflowing MR90 tank. See “Pit pump auto
control switch” on page 34.
IMPORTANT:
• If front of shaker is too high, large amounts of water will exit the shaker with the spoils.
• Monitor and adjust front/rear screen tilt as soil conditions change.
Electric shock. Contacting electric lines will cause death or serious injury.
Know location of lines and stay away.
To help avoid injury: Keep in mind, if electrical strike occurs while fluid hose is connected to drilling
unit, fluid system will also become electrified.
IMPORTANT: If drilling fluid contains bentonite, leave jet valve open to allow continuous mixing
while drilling.