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800-248-8498
800-248-8498
WWW.AMERICANPILEDRIVING.COM
WWW.AMERICANPILEDRIVING.COM
MODEL 300-4 VIBRO
Copyright © 2020 American Piledriving Equipment Inc. All Rights Reserved
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MAINTENANCE & TROUBLESHOOTING
MAINTENANCE & TROUBLESHOOTING
Periodic maintenance and some vibro
symptoms require the gearbox bearings to
be inspected. The results of this inspection
may indicate that the eccentrics require
replacement.
During this check make sure no dust, dirt, or
other contaminants can enter the gearbox.
If this procedure is being followed as part of
regular maintenance only one cover needs
to be removed and examined. If a problem is
suspected all covers should be removed and
inspected.
1. Remove one gearbox bearing cover.
2. Clean the bearing face. Examine both the
bearing face and the interior of the bearing
cover for wear or scorch marks.
3. Check the stamping on the outer ring of the
bearing. There should be letters etched top.
•
If the lettering is not on top, tap the
bearing with a rubber mallet to check if it
is loose. If it is loose, replace it and check
the eccentrics.
4. Inspect all visible components for chipping,
pitting, corrosion, or deformation.
5. If no damage is found, apply lube to the
bearing cover o-ring. Re-seat it, then attach
the bearing cover to the gearbox with
loctited bolts.
It is often difficult to determine if the eccentrics
are damaged. In general, damage to a bearing
requires the replacement of an eccentric. To
check the eccentrics:
1. Unbolt and remove the suppressor and
gearbox top plate.
2. Inspect eccentrics for chipping, pitting,
corrosion, or deformation.
3. Replace damaged eccentrics and bearings,
if necessary.
4. Apply fresh lube to o-ring cord before
sealing gearbox.
Damaged eccentric bearing in need
of immediate replacement.
Metal flakes have pooled at the bottom of this bearing. It
needs to be replaced.
Eccentrics may swing unexpectedly
and are heavy. The interior of the
gearbox is a major pinch and crush
hazard when open.
Checking Bearings and Eccentrics
Hydraulic motor on gearbox.
Etched words of manufacture location example: “USA”
should be top center of bearings. If lettering is not on top, tap
on the bearing with a rubber mallet to check if it is loose.
Note: not all bearings are made in USA.
