TM 9-2320-209-10-1
FRAME 4
WARNING
Do not let personnel stand near auger while boring or
spinning soil off auger. Soil spun off may contain objects
that can cause injuries.
CAUTION
To prevent damage to boring machine, do not make sudden
starts (impact loads) when starting to bore. Do not load
auger above bumper spring.
1.
When auger point (1) enters ground, push drive control lever (2) and feed control
lever (3) forward to start boring (position 4, table 4-3).
2.
Keep auger turning speed down to 25 rpm (1800 engine rpm) until hole is about
18-inches deep.
If auger is working smoothly, set auger turning speed for type of soil. (Refer to
3.
GO TO FRAME 5
Table 4-4. Gear, Speed Settings for Soil
Conditions
Auger Speed
Engine Speed
Transmission
(rpm)
(rpm)
Gear
Soil Type
Sandy Clay,
2200-2650
90-110
3rd
Ordinary Soil
Disintegrated
25
1800
1st
Shale, Similar
I
Sandstone,
1700-2400
40-60
2nd
Frozen Soil