Operation Manual

Section:
Page:
Engine:
Layout and Description
of Engine
2
2-0-02
S/BV 6/8/9 M 628
© 0883
2.4 04 Timing System
ILocated at the engine‘s driving end and driven from a big gear on the crankshaft, the timing gear
train drives, through idler gears, the camshaft, injection pumps and governor.
As determined by the engine‘s firing order, the camshaft, carried in bearing bushes, actuates the
inlet and exhaust valves as well as the starting pilot air distributor, The shaft is split in two halves
and can be pulled out of the engine lengthwise. Cams and bearing points are surface-hardened.
The pump chest at the engine‘s free end can mount, besides the standard lube oil delivery pump,
one oil suction pump and 2 cooling water pumps. The pumps are gear-driven, i.e. the oil pumps
direct and the coolant pumps through flexible couplings.
2.5 05 Speed Control System
The Engine is controlled by hydraulic governor which, through the injection pump‘s control rod,
automatically meters the amount of fuel to be injected as a function of engine load.
Overall engine control is by an engine-mounted panel or seperately installed local or remote control
units.
Emergency engine shutdown is possible by an automatic system or manually on the speed
governor direct.
2.6 06 Exhaust / Turbocharging System
The non-insulated exhaust manifold running along the engine is lagged by an easily removable
and multisplit casing. Only the water-cooled exhaust elbows from cylinder head to manifold are
located outside this casing. Being connected through sliding pieces with 0-seals, the water jackets
of the exhaust elbows form the cooling water manifold for the engine.
The engines are fitted with BBC turbochargers connected to the engine‘s cooling system. The
compressors of these turbochargers are cleaned by a scavenging device. The charge air is cooled
by water in special units.
The charge air pipe is divided into single sections for each cylinder. These sections are likewise
connected through sliding pieces with 0-seals.
This new concept of exhaust manifold with cooled elbows and integral water manifold, the division
of the charge air pipe, the plug-type water transfer pipes between cylinder head and crankcase
and, last not least, the use of hydraulic tools for tightening the cylinder head studs/nuts significantly
improve the ease in dismantling and refitting components at the engine top.