Information

Caterpillar C7 turbocharged, aftercooled
7.2 L electronic diesel
Peak Hp 350 Hp @ 2,400 rpm
Peak Torque 860 lb•ft (1166 N•m) @ 1,440 rpm
Transmission Allison 3000 MH six-speed automatic with lock up
Gear Ratios: First Second Third Fourth Fifth Sixth Rev.
3.49:1 1.86:1 1.41:1 1.00:1 .75:1 .65:1 5.03:1
Vehicle Weight Ratings
Front GAWR 12,000 lb (5448 kg)
Rear GAWR 19,000 lb (8626 kg)
GVWR 31,000 lb (14 074 kg)
GCWR * 41,000 lb (18 614 kg)
Wheelbase 252 in (6401 mm)
Front Axle I-Beam, wide track
Capacity 12,000 lb (5448 kg)
Track Width 81.9 in (1948 mm)
Rear Axle
Drive Ratio 4.78:1
Capacity 19,000 lb (8626 kg)
Track Width 69.3 in (1760 mm)
Brakes Full air brakes with auto slack adjusters and ABS
Front and Rear Service 15 x 4 in (front) and 16.5 x 7 in (rear) drum-style S-cam
Parking Spring applied air release 16.5 x 7 in
drum-style (rear axle)
Push-pull knob controlled
Cooling System
Radiator Core 2 rows, 15 FPI, 1050 in2 (6775 cm2
) area
Radiator Type Cross-flow, rear mounted
Charge Air Cooler Cross-flow
Transmission Oil Cooler Remote mounted water-to-oil
Fan Belt driven
Electrical System
Alternator Leece-Neville 160 amp
Starting Delco 28MT, 12 volt
Battery Two 950 CCA @ 0o
F (-18o
C); maintenance-free
Frame Raised Frame Rail Construction
Max Resist. Bending Moment 291,000 lb•in (32 892 N•m)
Max Frame Section 9.00 x 2.75 x .25 in (229 x 70 x 4.8 mm4 Newmar Northern Star 39.5ft Class A Diesel Fort Myers Florida