PURPOSE: To Provide user and support personnel supplemental operating, maintenance and repair parts
instructions that have special application to Military Adopted Commercial Items (MACI).
SCOPE: This application applies to Department of the Army units, organizations and activities that use and/or
support the Bucket, Clamshell, INTERGY Model 34GP S.
MILITARY ADOPTED COMMERCIAL ITEM (MACI): The term "MACI Item" used in this publication applies to a
standard commercial item of construction equipment that has been approved and adopted by the Army for a specific TOE
requirement and is procured and supported under the CCI system plan. The plan permits maximum utilization of the
civilian construction industrys competitive research and development, manufacturers equipment publications and
commercial sources for repair parts.
DESCRIPTION: The clamshell has a single main shaft block and tackle type of construction. The clamshell is
designed to use its weight, pitch of teeth, sharpness and angle of the lip in connection with the machine line pull to draw
the bucket downward into the material. Gravity causes the main shaft to move down pushing the bowls downward and
outward to dump the load.
OPERATIONAL CONCEPT: The clamshell bucket is designed to be used with a crane having a lattice or solid
boom for excavating or dredging. It is portable and is used by Engineer Construction Support Companies and Engineer
Port Construction Companies.
EQUIPMENT PUBLICATIONS: Initial publications are a commercial manual and Supplemental Operating,
Maintenance and Repair Parts Instructions (SOMARPI). Two manuals will be overpacked and shipped with each end
item. Department of the Army publications will be forthcoming and will be available through the normal publications supply
MOS Requirements: In accordance with AR 611-201
(1) Crane Operator: MOS 62F
(2) Organizational Maintenance: MOS 62B
(3) Direct/General Support Maintenance: MOS 62B
Depot Maintenance is not required.
Logistics Assistance Representatives (LARs) are stationed at CONUS and
OCONUS installations and are available to provide on-site technical assistance, upon request from the installation.
Warranty period for the Bucket, Clamshell, Model 34GP S is eight (8) months following the date of
acceptance by the government. See the manufacturers commercial manual for the warranty.
RECOMMENDING PUBLICATION CHANGE:
improvements, using DA Form 2028 (Recommended Changes to Publications and Blank Forms) and mail direct to:
Commander, U.S. Army Tank-Automotive Command, ATTN: AMSTA-MB, Warren, Ml 48397-5000.