ALUMINUM WHEELS
Two (2) polished aluminum wheels shall be supplied and installed on the front axle. The wheels
shall be highly polished on the outboard side.
WHEEL TREATMENT
The aluminum wheels shall be supplied with wheel treatment for a bright finish and wheel
protection.
FRONT WHEEL TRIM
The front axle shall be trimmed with mirror finish, 304L grade, non-corrosive stainless steel 'baby
moon' hub caps with an opening for viewing the oil seal cover, and bright finished nut covers.
SINGLE REAR AXLE
The rear axle shall be a MERITOR model "RS-25-160" with a 27,000# capacity for the fire service.
DRIVER CONTROLLED DIFFERENTIAL LOCK
The rear axle shall be supplied with a MERITOR driver controlled differential lock. The
differential lock shall be operated by an air-actuated shift unit.
The air control valve shall be provided on the Driver's dash panel complete with a light to indicate
when the differential is in the locked position.
REAR AXLE BRAKES
The rear brakes shall be Cam type, 16-1/2" X 7", S-Cam; air operated heavy duty brakes automatic
slack adjusters.
VEHICLE TOP SPEED
The rear axle shall be geared for a top speed of 62 to 65 mph at engine governed RPM.
manufacturers utilizing higher speed gear ratios and electronic speed limiting will be unacceptable
SINGLE AXLE REAR SUSPENSION
The rear springs shall be a minimum of seventeen (17) main including four (4) auxiliary leaves.
The rear suspension shall have a rating of 27,000 lbs. Capacity. The rear suspension shall be a
"self-leveling" slipper type with a main torque leaf that contains a military wrapper. The torque
leaf shall contain a bronze bushing for long service life.
Two (2) main frame cross members shall be mounted in the rear suspension area, bolted to the
frame rail as a rear suspension support member. Each cross member shall be a wide base flanged
design to provide frame spacing and to prevent frame paralleling. Each cross member shall be
bolted in place using grade 8 bolts, hardened washers, and grade "C" distorted thread locknuts.
REAR SHOCKS
Dual heavy duty shock absorbers shall be installed on the rear suspension.
TIRE CHAINS
The rear axle shall be equipped with an ON-SPOT automatic tire chain system. The driver's dash
shall have an electric control switch, clearly labeled for operation of the tire chains. The switch
