Section 100-0010
1
SM 1960 Rev 1 4-02
CHASSIS - Frames
SM - 2475
Fig. 1 - General Arrangement of Frame Assemblies
DESCRIPTION
The chassis consists of two separate frame
assemblies which provide the articulation of the unit.
The front and rear frames are constructed of all
welded high-grade steel fabrications with rectangular
box section beams forming main, side and cross
members. The frames are coupled to provide 45°
articulation to each side as well as oscillation.
The front frame is fabricated to form a rigid structure
which carries the cab, power train and suspension
system.
The rear frame is fabricated to form a rigid structure
which carries the body, body hydraulics, suspension
and rear drive axles.
Oscillation between the front and rear frames is
provided by a large diameter cylindrical coupling
carried on nylon bushes located in the rear frame.
Longitudinal shocks are absorbed by the thrust faces
of the nylon bushes. A large thrust nut, which is
threaded to the end of the coupling and locked to the
frame, secures the coupling in position. Wear on the
thrust faces of the bushes is compensated by
tightening this thrust nut.
INSPECTION AND MAINTENANCE
Inspection
Inspect the frames and attached parts at intervals not
exceeding 250 hours for cracked or broken welds and
bending of the frame. Any defects found should be
repaired before they progress into major failures.
Straightening
Hydraulic straightening or aligning equipment should
be used to straighten bent or twisted frames whenever
possible. However, if heat must be applied, never heat
the metal beyond a dull, cherry red colour, as too
much heat will weaken the metal. When it is necessary
to heat the metal, apply heat uniformly over the area to
be straightened and protect the heated surface from
sudden cooling. Frame parts that cannot be
straightened should be renewed.
Courtesy of Machine.Market
To Next Page
Loading...
