Figure 1-2. Rock drill assembly, left rear, 34 view.
regulator to regulate the air and hydraulic pressure.
(22) Two tracks (fig.1-1) used as the drill carrier.
Differences Between Models
This manual covers only the Joy Model RAM-MS-
5/450A-DR crawler mounted rock drill. No known unit
differences exist for models covered in this manual.
Identification Plates. The pneumatic rock
drill has two major identification plates.
(1) Army data plate located on the rear section
of the pedestal. It lists the equipment manufacturer,
model number, serial number, Federal Stock Number
and contract number.
(2) Lifting data plate located on the top section
of the pedestal. It illustrates proper lifting instructions.