Humboldt H-1366 Marshall, Automatic, Single Compactor - Manual (Page 5)

Operation
Test Specimens
Prepare at least three specimens following procedures outlined in ASTM D1559, D5581,
D6926, D6927 and AASHTO T245.
Thoroughly clean the specimen mold, and face of the compaction hammer, heat them
according to specification, and introduce the mixture as explained in the standard.
Replace the collar, place the mold assembly on the compaction pedestal in the mold
holder, and preset the specified number of blows (to each side of the specimen) using
the H-1334 counter’s preset switch. Actuate the counter to begin compaction, which will
automatically end at the preset number
To make mold removal and reversal easy lift the entire hammer assembly and rotate the
top weight ¼ turn either way allowing the release wedge to rest on top of the guide
support while you load a new mold and sample. After loading the mold rotate the
release wedge to the back and the hammer will be in place to begin compaction. The
following figure shows these positions.
Top View
Front View
Maintenance
The gearbox is filled with oil and does not normally require further attention. If necessary
to add oil use AGMA Grade 8A-EP, SAE 250. Pillow block bearings should be lubricated
regularly with multi-purpose or heavy duty grease through the grease fittings provided.
Care must be taken to avoid handling the hammer rod(s) with dirty gloves – keep the
hammer rods clean. The compactor’s exposed, moving metal parts should be kept clean
and lightly oiled.