Specifications

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Upper and lower control arms shall be used on each side of the axle. Upper control arm castings shall
be made of 100,000-psi yield strength 8630 steel and the lower control arm casting shall be made of
55,000-psi yield ductile iron.
The center cross members and side plates shall be constructed out of 80,000-psi yield strength steel.
Each control arm shall be mounted to the center section using elastomer bushings. These rubber
bushings shall rotate on low friction plain bearings and be lubricated for life. Each bushing shall also
have a flange end to absorb longitudinal impact loads, reducing noise and vibrations.
There shall be nine (9) grease fittings supplied, one (1) on each control arm pivot and one (1) on the
steering gear extension.
The upper control arm shall be shorter than the lower arm so that wheel end geometry provides
positive camber when deflected below rated load and negative camber above rated load.
Camber at load shall be zero degrees for optimum tire life.
The ball joint bearing shall be of low friction design and be maintenance free.
Toe links that are adjustable for alignment of the wheel to the center of the chassis shall be provided.
The wheel ends must have little to no bump steer when the chassis encounters a hole or obstacle.
The steering linkage shall provide proper steering angles for the inside and outside wheel, based on
the vehicle wheelbase.
The axle shall have a third party certified turning angle of 45 degrees. Front discharge, front suction,
or aluminum wheels shall not infringe on this cramp angle.
FRONT SUSPENSION Bidder Complies: Yes ( ) No ( )
Front independent suspension shall be provided with a minimum ground rating of 22,800 lb.
The independent suspension system shall be designed to provide maximum ride comfort. The design
shall allow the vehicle to travel at highway speeds over improved road surfaces and at moderate
speeds over rough terrain with minimal transfer of road shock and vibration to the vehicle's crew
compartment.
Each wheel shall have torsion bar type spring. In addition, each front wheel end shall also have energy
absorbing jounce bumpers to prevent bottoming of the suspension.
The suspension design shall be such that there is at least 10.00" of total wheel travel and a minimum
of 3.75" before suspension bottoms.
The torsion bar anchor lock system allows for simple lean adjustments, without the use of shims. One
can adjust for a lean within 15 minutes per side. Anchor adjustment design is such that it allows for
ride height adjustment on each side.
The independent suspension shall be put through a durability test that has simulated a minimum of
140,000 miles of inner city driving.
SHOCK ABSORBERS Bidder Complies: Yes ( ) No ( )
Heavy-duty telescoping shock absorbers (KONI) shall be provided on the front suspension.
OIL SEALS Bidder Complies: Yes ( ) No ( )
Oil seals with viewing window shall be provided on the front axle.
FRONT TIRES Bidder Complies: Yes ( ) No ( )
Front tires shall be Michelin 425/65R22.50 radials, 20 ply all-position XZY3 wide base tread, rated for
22,800 lb maximum axle load and 65 mph maximum speed.