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MACHETE
TECHNICAL INFORMATION BULLETIN No. 120697
Alamo Industrial Technical Services Department
1502 East Walnut
Seguin, Texas 78155
830-372-2708
Models: MacheteBoom MB21 & MB24
Date:
Dec. 6, 1997
Bulletin No:
120697
Lock Valve Installation Instructions:
Instructions for installing a lock valve on the tilt function of an Alamo Industrial Model Machete
Boom product manufactured before May 1, 1997.
The nominal leak down rate for the cutter head tilt section of the electrically controlled positioning
valve is one inch of rod travel in four minutes. If your machine exhibits a leak down rate substantially
greater than this, it typically indicates excessive valve component wear due to contaminated oil in the
tractor. Refer to the Tractor's Operator / Maintenance guide concerning Oil & Filter change intervals to
eliminate contamination possibilities.
If the cutter head tilt cylinder leak down is greater than one inch of rod travel in four minutes and
this is considered excessive, a lock valve may be added to the tilt function of the boom machine. Alamo
Industrial has developed a cure for this and can provide (at a nominal charge) all the parts for a lock out
vale for the tilt function. The Lock valve will only work on the tilt function of the Boom Machine due to the
design of the hydraulic System. The only parts that must be provided by the installer are two, twelve inch
pieces of 18 gauge wire. Each wire needs to have a # 8 ring connector on one end and a wire splice
connector on the other end.
The drawings on the next page shows the details of the parts and their assembly. The Lock Valve
must be installed in the "C-1" port of the cutter head tilt section
The following parts are required to make this modification:
Part No. Qty Description
02972180 1 Straight Hydraulic Adapter (available from Alamo Industrial)
001654 1 Hydraulic Fitting, 90° Elbow (available from Alamo Industrial)
02972208 1 Solenoid Valve Assembly (available from Alamo Industrial)
------------- 2 18 gauge wire, 12" long each (furnished by installer)
------------- 2 # 8 ring connectors (furnished by installer)
------------- 2 18 gauge splice connectors (furnished by installer)
NOTE; Installation of this Lock valve will not be covered under warranty.
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