Specifications

300 SERIES MAN HOLE DIGGER
FORM GOM12070702, VERSION 1.2
38
Note: Tungsten Carbide hardfaced versions (SB25C,
SB35C and SB45C) of each applicable screw bit are
available. A screw bit hardfaced with Tungsten Carbide
will not increase the overall productivity rates of a
specific auger equipped with the standard screw bit.
The Tungsten Carbide hardfacing will only substantially
increase the anticipated service life of a screw bit.
1) The replacement of the auger screw bit will require a
level
working platform of sufficient size and appropriate
height.
2) Inspect the auger for worn or broken components.
Check to determine that the auger does not have a
bent or damaged axle. A bent or damaged axle will
cause the auger to "wobble" during use. Maximum
allowable auger wobble is 0.25 inch (7 mm) total
indicated runout (TIR). An auger with a total indicated
runout wobble in excess of this value should be
removed from service and scrapped.
DO NOT OPERATE AN AUGER WHICH HAS A
BENT OR DAMAGED AXLE WITH A TOTAL
IND IC ATE D RU N OU T EX CE ED IN G THE
MAXIMUM ALLOWABLE LIMIT. EXCESSIVE
AUGER WOBBLE CAN REDUCE OPERATOR
CON TR O L, RE SU LTI NG IN P R OP ER TY
DAMAGE AND/OR PERSONAL INJURY.
3) Using the wrenches, remove the cap screw which
retrains the screw bit to the drive lug. Remove the worn
screw bit and properly dispose.
4) Inspect the drive lug for signs of excessive wear and
damage. To replace the drive lug, it must be removed
from the auger plate with either a suitable saw or
cutting torch.
5) Install the replacement screw bit and retaining
hardware to the drive lug. Hardware is unidirectional.
Secure tight with the wrenches.
REPLACING WORN AUGER TEETH.
Application: All augers 6 inch diameter and larger.
Tools Required:
1 each, 1/4 inch drift punch.
1 each, suitable safety glasses.
1 each, plastic hammer or,
1 each, soft type hammer specifically designed for
impact use.
Parts Required:
Required Quantity, 35 Standard Dirt Tooth or,
Required Quantity, 35HFC Hardfaced Dirt Tooth or,
Required Quantity, 5T30 Chisel Tooth or,
Required Quantity, 5T30HFC Hardfaced Chisel Tooth,
or
Required Quantity, 1336 Tungsten Carbide Tooth.
Note: Augers utilized with the 300 Series Hole Diggers
feature a wide variety of available tooth designs and
configurations to increase their productivity rates and
maximize service life during the digging process.
Teeth are forged from alloy steel and heat treated to
extend their service life. All teeth incorporate the same
retaining system and are fully interchangeable as far as
their
configuration and usage allow. Available teeth
include the following:
35 Standard Dirt Tooth. For ordinary digging
conditions. Thin cross section for fast penetration.
Wears sharp. Install in all sockets of all boring heads.
Service Life Factor: 1.
35HFC Tooth. Same as the 35 Standard Dirt Tooth
with the exception of hardface material deposited on
one side. Install with the hardface material facing up.
Service Life Factor: 2 to 4.
5T30 Chisel Tooth. Helps rip through caliche, hardpan
and other semiconsolidated soil formations. Install only
in the inside sockets of boring heads with the rib facing
up towards the drive hub. Not for use alone with 6 inch
diameter augers. Its use increases the service life of
other tooth configurations. Service Life Factor: 1.5.
5T30HFC. Same as the 5T30 Chisel Tooth with the
exception of hardface material deposited on one side.
Install with the hardface material facing up. Service Life
Factor: 2 to 5.
1336 Tungsten Carbide Tooth. For use in extremely
abrasive soil formations and frozen soils. Not for use
in soil formations containing a high percentage of rock
larger than the size of a golf ball. Its use in soil
formations containing a large percentage of rock can
result in chipping damage to the Tungsten Carbide
inserts. Delivers extended service life over standard
and hardfaced tooth configurations in most soil
formations. Its use will not normally increase
productivity rates over standard and hardfaced tooth
configurations. Service Life Factor: 2 to 10.
1) The replacement of the auger teeth will require a
level working platform of sufficient size and appropriate
height. Wear safety eyewear and any other safety
apparel deemed appropriate for the job application
and/or job site environment.