7Engine
Built-in Cummins® reliability
mix of proven eld performance and
advanced technology is designed to be
powerful, durable and reliable.
cummins QsX15
e HHT Series (435, 585 and 535 hp)
is powered by the dependable Cummins
QSX 15-liter six-cylinder turbocharged
engine. Buhler selected the Cummins
QSX15 during the development of
the HHT Series to optimize the per-
formance of the tractor, shaping power
curves and ratings to al ign with work
environment, load factors and operat-
ing modes. e result is an ecient and
reliable high horsepower tractor that
will work hard for years to come.
35% torque rise at 1400 RPM
7% power bulge at 1800 RPM
900
1100
1200
1400
1000
1300
1500
180017001600150014001200 1300

Torque (lb-ft)

Engine RPM

Power (hp)

300
350
400
325
375
425
450

Cummins QSM (305 :: 340:: 375:: 400)

1300
1500
1600
1800
1400
1700
1900
180017001600150014001200 1300

Torque (lb-ft)

Engine RPM

Power (hp)

425
475
525
450
500
550
575

Cummins QSX (435 :: 485:: 535)