Allis Chalmers 7000

Allis Chalmers 4.9L 6-cyl diesel

Bore × stroke

3.88 in × 4.25 in

Rated speed

2,200 rpm

Compression

16.25:1

Aspiration

turbocharged diesel

Cooling

liquid-cooled

Firing order

1-5-3-6-2-4

Notes

The 2900 engine was used on the maroon-chassis Allis 7000, until serial number 8000 in 1978.

Engine

Bore × stroke

3.88 in × 4.25 in

Rated speed

2,200 rpm

Compression

16.25:1

Aspiration

turbocharged diesel

Cooling

liquid-cooled

Firing order

1-5-3-6-2-4

Notes

The black-chassis model 7000 engine was designed the 649T, with several internal changes over the 2900 including new Bosch injectors and oil cooling jets. Rated power did not change.

Power Director: Four forward gears and one reverse combined with three-range power shift between low, direct, and overdrve. Used on the maroon-chassis model 7000. Power shift was similar to the Allis Power-Director system, with a third clutch added to provide an overdrive.

12-speed partial power shift: Four forward gears and one reverse combined with three-range power shift between low, direct, and overdrve. The black-chassis Allis 7000 used a new hydraulic wet clutch and torque limiter. A combination clutch/inching pedal put the transmission into low range when depressed.