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CD Manual Cummins NTC-400 Diesel Engine
Repair
CD with the engine manuals for repair and parts for the
Cummins NTC-400 diesel engine (.pdf) this covers the Big Cam I, Big
Cam III
This CD contains:
TM 9-2815-226-34-1 the Direct Support
and General Support Maintenance for Cummins Model NTC-400 BC2,
Six-Cylinder Inline, Turbocharged Diesel Engine
TM 9-2815-226-34-2 Volume 2 for the
Direct Support and General Support Maintenance for Cummins Model
NTC-400 BC2, Six-Cylinder Inline, Turbocharged Diesel Engine
TM 9-2815-225-34&P This manual
contains repair procedures and supplemental data for the Cummins
NTC-400 six-cylinder, in-line, turbocharged diesel engine. The
repair procedures in this manual are for use at direct support and
general support maintenance levels.
All information contained in this
manual applies to both Big Cam I and Big Cam III engines except
where differences are specifically noted.
The Cummins NTC-400 diesel engine is used on all M915 through
M920, M915A1, and M915A4 trucks. It is a turbocharged,
liquid-cooled, overhead valve, four-cycle engine of in-line
six-cylinder design.
The NTC-400 engine has a compression
ratio of 13.5: 1 (M915) and 14.0: 1 (M915A1), and develops 400
horsepower at 2100 rpm. Peak torque is 1150 lb-ft at 1500 rpm
(M915) and 1300 lb-ft at 1300 rpm (M915A1).
The following engine characteristics
and features apply to both M915/Big Cam I and M915A1/Big Cam III
engines, except where differences are noted.
Camshaft: 2-1/2-inch diameter camshaft
with gear drive controlling all valve and injector movement. Made
of inductionhardened alloy steel.
Camshaft followers are roller type.
Connecting Rods: Drop-forged, rifle-drilled for pressure
lubrication. Crankshaft: High-tensile steel forging.
Bearing journals and fillets-induction
hardened.
Fully counterweighted. Cylinder Block:
Alloy cast iron with removable wet liners.
Cylinder Heads: Each head serves two
cylinders.
Drilled fuel supply and return
lines.
High temperature inserts on exhaust
valve seats.
Turbocharger: Model T-50 (M915/Big Cam
I); Model T-46-B, which has a redesigned compressor wheel,
compressor housing, turbine wheel and shaft, bearing housing
assembly, location of oil inlet line, and vee bands (M915A1/Big Cam
III).
Exhaust Manifold: Conventional log-type
(M915/Big Cam I). Pulse-type for less restriction (M915A1/Big Cam
III). Fuel System: Integral flywheel-type governor.
Injectors: Camshaft actuated top-stop
type.