This handbook provides information for the operator of the AT422T Grove All-Terrain Crane
The lift capacities are listed on the Load Chart in Appendix E.
The all-terrain crane incorporates an all welded steel frame using planetary drive axles to
provide selectable four-wheel drive. Axle steering is accomplished utilizing hydraulic steer
cylinders. The engine is mounted at the front of the crane and provides motive power through a six
speed transmission. Hydraulic, double box, sliding beam outriggers are integral with the carrier
frame. Figure 1-1 will be useful in locating components of the crane.
The carrier frame incorporates oscillation lockout cylinders to which the axles are mounted.
Axle oscillation is provided through the front and rear axle suspension cylinders.
The superstructure is capable of continuous 360 degree rotation in either direction. All
crane functions are controlled from the fully-enclosed cab mounted on the superstructure. On site
travel can also be accomplished from driving controls located in the superstructure cab. The basic
crane is equipped with a three-section, trapezoidal, cable synchronized boom. Lifting is provided by
a main hoist and an auxiliary hoist.
The crane is also capable of supporting and operating a clamshell bucket, a pile driver, a
concrete bucket, and a grapple. Special hardware adapters and hydraulic quick disconnects have
been provided for attaching these components. The crane is equipped with the following additional
equipment requirements: NATO socket; 24-volt electrical system; air conditioning; AOAP valves for
engine oil, transmission, and hydraulic system; pintle hooks; specific tiedown brackets; black out
lights; decontamination canister bracket; additional safety and other decals; weight classification
sign kit; emergency recovery system (electric over hydraulic); rifle rack; catwalk bracket; and CARC
Throughout this manual, reference is made to left,
right, front, and rear when describing locations.
When operating the crane from the carrier, these
reference locations are to be considered as those
viewed from the operator's seat with the super-
structure facing forward over the front of the carrier