Allied 5500, Technical Manual, Page: 13 / 68

SECTION 2.0 OVERVIEW
The Allied Hole-Hog is a pneumatically
propelled, reversible, ground piercing tool.
The tool consists of three primary sections:
Body/Anvil, Striker and Tail Assembly. A
simple reversing mechanism allows the op-
erator to easily change the tool’s direction
from forward to reverse.
2.1 Body/Anvil
The body/anvil forms the majority of the
Hole-Hog’s exterior. It consists of the anvil
and the body. Refer to Figure 2-1. The
body/anvil is the ground contact surface.
Wear of this component is expected and
normal. The body is internally threaded at
the rear for attaching the Tail Assembly.
The anvil is the conical surface that forms
the front of the body/anvil. The anvil is
pressed into the body, and cannot be re-
moved from the assembled body/anvil.
2.2 Striker
The striker is moved by air pressure back
and forth within the body. Internally, the
striker impacts either the anvil in the front
or the tail assembly in the rear to propel the
Hole-Hog through the ground.
2.3 Tail Assembly
Except for the Striker, the Tail Assembly
contains all internal operating compo-
nents, including the reversing mechanism .
The external threads of the Tail Assem-
bly’s End Cap secure the Tail Assembly to
the Body/Anvil. The Whip Hose attaches to
the other end of the Tail Assembly.
Hole-Hog service and repair require re-
moval of the tail assembly to access the ser-
viceable parts.
2.4 Differences Among Models Covered
This manual covers the Allied Hole-Hog
Model 5500. There are no significant differ-
ences among the Hole-Hogs with this
model number.
A
LLIED Model 5500 Hole-Hog
08/25/00 3
Body/Anvil Tail Assembly
End Cap Whip Hose
Hose Socket
and Coupling
Figure 2-1. Major Components: Hole-Hog, Model 5500