Operation Manual

Section:
Page:
Engine:
Layout and Description
of Engine
2
2-0-03
S/BV 6/8/9 M 628
© 1296
2.7 07 Fuel System (see also 5.1)
The following integral in-line injection pumps are provided:
6 and 8-cylinder models: 2 pumps with 3 and 4 elements respectively
9-cylinder model: 3 pumps with 3 elements each
The type of pumps chosen and the connection of the injection piping to the cylinder head sideways
gave the advantage of very short injection piping.
Pump lubrication is connected to the regular motor oil circuit. In the case of engines running on
intermediate fuels a sealing-oil system prevents the lube oil from being diluted by fuel.
The multi-orifice injection nozzle is located in the middle of the cylinder head and connected to the
latter by a lateral injection line.
The fuel feed pump is mounted on one injection pump. Fuel cleaning is through a change-over type
duplex filter.
In the case of engines running on heavy fuel, the feed pump is installed seperately. The change-
over duplex filter can be preheated by having the transferred, preheated fuel flow through the filter.
If available, the injection nozzles are cooled with engine lube oil or gas oil or - in exceptional cases
- even with engine coolant.
2.8 08 Lubricating Oil System (see also 5.2)
From the oil sump, or the low- or high-level oil tank, as provided, the engine mounted delivery-type
oil pump forces the oil through the oil-cooler, usually also engine-mounted, and the combined oil
filter (paper filter followed by edge filter) into the oil gallery integrally cast inside the crankcase.
From this gallery the oil flows on through passages in the crankcase wall to crankshaft journals and
crankpins and to the nozzles provided for cooling the pistons. Passages in the crankcase front,
wich are connected to the oil gallery, supply the timing gear train.
Additional bypass oil filtration is by two centrifuges attached to the crankcase doors.
Connections are also available for standby oil pumps and the electric priming pump.
2.9 09 Cooling Water System (see also 5.3)
As requiered by the particular engine application, the following standard systems can be provided:
1. Single-Circuit: This circuit serves actual engine plus lube oil and charge air cooler. The
water is cooled in a separate tubular heat exchanger.
2. Double-Circuit: One cooling circuit is provided for the engine, a second one for oil and
charge air cooler. The coolant heat dissipated is a separate tubular heat
exchanger.
3. Triple-Circuit: This system is primarily used for water cooling by radiator. Engine, oil cooler
and charge cooler have a circuit of their own.
Optionally available are various versions of the above two systems