
SECTION 12.0 HOLE-HOG TROUBLESHOOTING CHART
The following chart outlines corrective actions for several commonly encountered condi-
tions. For further information, contact the Allied Technical Service Department.
58
A
LLIED
4000 Series Hole-Hog
Will not run
or start
Runs
erratically
in forward
Runs
erratically
in reverse
Stops in
ground
Low
impact
power
Slow
ground
penetration
Cause &
Corrective Action
X
X
X
X
X
Restriction in air supply hose.
Disconnect & purge hose.
X
X
X
Bent valve stem.
Replace valve stem.
X
X
X
Air pressure too high.
Check air pressure.
X
X
Air pressure too low.
Check air pressure.
X
X
X
X
X
Ice buildup inside unit.
Follow de-icing instructions.
X
X
Ground too hard or too soft.
Re-evaluate application.
X
X
Deteriorated shock absorber
Replace shock absorber.
X
X
Excessive internal clearances.
Replace body, striker, or valve.
X
X
Improper lubrication.
Follow lubrication instructions
X
Foreign material inside unit.
Disassemble & clean.
X
X
Broken/misaligned internal parts.
Disassemble, then repair or
replace.
X
X
Rusted or rough sliding
surfaces.
Disassemble, clean and
polish.
X
X
X
Hit obstacle.
Reverse tool from hole and
retry.
Hole-Hog Troubleshooting Chart