D20x22 Series II Navigator HDD
Overview 30-63
Adding Antifreeze to Drilling Fluid
System
Store RV-type antifreeze in tank
(1)
. It
can be reused as necessary. Replace
antifreeze when it is too diluted to
protect system.
Step 1:
Drain and flush drilling fluid
tank and pump. Refer to
“Flushing Bentonite/
Polymers from Drilling Fluid
System,”
Step 2:
Fill tank
(1)
with 6 gal (23 L)
of RV-type antifreeze. Use at full strength; it will become diluted as it is used.
Step 3:
Install cap
(2)
on coupler, open valve
(3)
, and operate pump until antifreeze comes out of drive chuck.
Step 4:
Connect wash wand to quick coupler
(4)
.
3
4
2
1
