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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 align with work
environment, load factors and operat-
ing modes. e result is an ecient 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)