Alamo Machete T 7740 User Manual

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MACHETE

TECHNICAL INFORMATION BULLETIN No. 040896

Alamo Industrial ™ Technical Services Department

1502 East Walnut

Seguin, Texas 78155

830-372-2708

Models:

All Models using Single Acting Hydraulic Cylinder

Date:

Apr. 8, 1996

Bulletin No:

040896

This document does not authorize the repair or replacement of parts under warranty

Oil Leaking from new single Acting Hydraulic Cylinders:

There have been numerous cases of the dealers and customers replacing single acting

hydraulic cylinders on new machines due to oil leakage out of the vent plug in the cylinder.

In many of these instances, no defect could be found in the cylinders. Further investigation

has revealed that he manufacture of our cylinders is leaving oil in the cylinders after their testing. The
Oil is left to help protect the interior of the cylinders during storage. When the cylinders are fully
actuated, they are forcing this oil out the vent plug, causing what appears to be a leaking cylinder
through the vent plug. Even the oil is cleaned off the cylinder after testing there is enough oil still inside
the cylinder to bleed out when used.

If you have a New Cylinder that appears to be leaking from the vent plug, The oil should be

cleaned off and unit ran for a few days to a week to determine if the Cylinder is leaking, or if it is the
oil that was left in the cylinder to protect it. It has been found that in some cases it has taken as much
as a week for this to appear that it is not leaking.

If after running and cycling the cylinder during operation and the cylinder continues to leak then

the necessary repair should be performed.

Cylinders that are attracting dust around them is not considered to be leaking. This dust

collecting around them is considered normal.

All Cylinder that are returned as leaking will be pressure tested for leakage to determine the

condition of the Cylinder and its components.