Specifications

300 SERIES MAN HOLE DIGGER
FORM GOM12070702, VERSION 1.2
21
The Hole Digger may utilize operator handles
constructed of a specially designed, S-Type
composite material intended to reduce
machine weight and help absorb the shock
loads transmitted to the operators during the
digging process. This material has shown to
be very durable and will offer a very
acceptable service life. However, it will not
tolerate the same amount of external damage
as steel tubing without some sacrifice of its
appearance and/or physical strength
properties. Protect the handles from external
sources of damage. Do not allow the handles
to come in contact with augers, shovels, or
other sharp and abrasive objects during
transit. Do not stack or throw similar objects
on the handles during storage. Keep the
handles clean and free of dirt, moisture,
grease, oil and other, foreign material
accumulations. Exercising proper
preventative maintenance for the handles will
result in an extended service life.
USE OF THE COMPOSITE MATERIAL
OPERATOR HANDLES DOES NOT ELIMINATE
THE POTENTIAL FOR PROPERTY DAMAGE
AND/OR PERSONAL INJURY IF CONTACT
WITH A BURIED ELECTRICAL CABLE IS
MADE. SEE: “DETERMINATION OF
POTENTIAL SUBSURFA
CE HAZARDS IN THE
PROPOSED DIGGING CONDITION(S)”
ELSEWHERE IN THIS OPERATOR MANUAL.
1) Operator handles are constructed from a composite
material with a demonstrated high dielectric constant.
This insulating characteristic alone does not guarantee
that contact with a buried electrical cable will not allow
energy to be transmitted directly to the operators. Other
factors reducing the insulating characteristics of the
operator handle configuration include, but are not
limited to:
a) Throttle cable. The throttle cable connects directly to
the engine according to the design offered by the
specific engine manufacture. The throttle cable is
manufactured from conductive type materials for
strength and durability purposes. This allows energy to
flow from the auger through the engine and directly to
the Magura throttle control.
b) Throttle control. The Magura throttle control is
fabricated from reinforced plastic. There is no
guarantee the design configuration will eliminate
energy being transmitted from the throttle cable,
through
the throttle control and directly to the operator.
c) External condition of the operator handles.
Accumulation of moisture, dirt, pitch and other foreign
substance can provide a conductive pathway for
energy to be transmitted from the exterior of the
operator handle and directly to the operator. It is
recommended that operator handles be maintained in a
clean, dry condition and free of all foreign materials.
2) The composite material is formulated by its
manufacturer with an inhibitor to reduce (but not
eliminate) the long term effects of ultra violet radiation
from the sun. However, it is still recommended the
composite material operator handles be protected from
ultra violet radiation whenever possible to extend their
service life.
3) Composite material operator handles are coated
with a polyurethane finish to help protect from external
damage and abuse. With normal usage and
environmental effects, small strands of fiber can
protrude from the exterior surface. When performing
preventative maintenance on the Hole Digger, the
protective covering can be restored by lightly sanding
the handle surface with 240 grit sandpaper and then
applying two, thin coats of polyurethane.
Wear all appropriate safety apparel and
equipment when utilizing the sandpaper and
clear polyurethane spray. Follow all
appropriate safety precautions for the use of
these materials.
4) A composite material operator handle with a cut or
abrasion greater than 0.125 inch (3.2 mm) deep and
one inch (25 mm) long must be removed from service
and replaced with a factory approved replacement part
only.
5) Do not operate the Hole Digger without the proper
handle reinforcement properly attached to the
transmission case sockets.