Kohler KD103V20 Operation And Maintenance Manual page 19

Characteristics
A robust basic design and generous dimensioning form the basis for high operational safety
and a long service life. Fuel consumption and exhaust gas emissions are lowered due to an
optimized combustion process adapted to the emission requirements. Minimized maintenance
obtained by optimized engine components and accessories leads to higher availability and
increased efficiency.
Driving gear
The engine has a quench tempered steel crankshaft with inductively hardened pins and fillets.
A torsional vibration damper is mounted on the crankshaft on the engine damper side. Motion
transfer is ensured by precisely forged con-rods, complete with sputtered driving gear bearings.
The steel brazed pistons benefit from stage support and cooling duct.
Housing
The rigid, laterally drawn down crankcase has an upper section with optimized structure and an
oil pan as lower section. Four–valve single cylinder heads benefit from flow optimized ports as
well as replaceable valve seats and valve guide. Brackets, flywheel housing, aggregate support,
and oil pan on the bottom close the engine.
Drive control
Two inlet and outlet valves are mounted in the cylinder head for each cylinder. The valves are
actuated through steel camshaft via cam follower, push rod and rocker arm.
Driven by gear train on the flywheel side:
– Camshaft
– Fuel high pressure pump
– Fuel prefeed pump
– Oil pump
Driven by gear train on the damper side:
– Coolant pumps
– Battery charging alternator
– Air conditioning compressor (depending on application)
– Air compressor (depending on application)
Lubrication
An engine oil pump ensures force-feed lubrication of bearings (crankshaft, con-rods, camshaft,
gears), bushings (piston pins), cam followers, and rocker arms.
Oil filtration depends on requirements.
The following auxiliary units are also connected to the engine oil circuit:
– Fuel high pressure pump(s)
– Coolant pumps
– Turbochargers
– Air compressor (depending on application)
Crankcase ventilation
As modular arrangement depending on requirements, up to four high efficiency passive filter
units are mounted on top of the engine.
KD103V20 33521030901_2_1 EN_US
2022-09
© 2022 by Kohler Co. All rights reserved.
Product description
Technical description
19