John Deere 6630

John Deere 6.8L 6-cyl diesel

Bore × stroke

4.19 in × 5 in

Rated speed

2,300 rpm

Rated power

130 hp

Torque

389 lb·ft at 1,600 rpm

Aspiration

turbocharged diesel

Cooling

liquid-cooled

Emissions

Tier III

Firing order

1-5-3-6-2-4

Notes

6-cylinder 12-valve

John Deere SyncroPlus: Three gears (1-3), plus reverse (R) in four ranges (A-D).

John Deere PowrReverser: The PowrReverser transmission adds a left-hand shuttle lever to the SynchroPlus transmission. Reverse gear is replaced with a fourth gear in each range. Reverse speeds slightly higher than the matching forward speed.

John Deere PowrQuad: Four gears (1-4) in four ranges (A-D) with left-hand shuttle lever. Power shift between gears. Clutch must be used to shift between ranges. Reverse speeds are slightly higher than forward speeds. Optional creeper provides an additional 12 speeds in ranges A-C, from 0.26 kph to 1.5 kph. PowrQuad Plus provides push-button gear shifting on the range-shift lever.

John Deere PowrQuad Plus: Four gears (1-4) in six ranges (A-F) with left-hand shuttle lever. Power shift between gears. Clutch must be used to shift between ranges. Reverse speeds are slightly higher than forward speeds. Optional creeper provides an additional 12 speeds in ranges A-C, from 0.16 kph to 1.12 kph. PowrQuad Plus provides push-button gear shifting on the range-shift lever.