59
Description
Upper cylinder liner seat
Lower cylinder line guide
The cylinder block is one-piece cast of special alloy.
Stresses on the cylinder head bolts from combustion
pressure are transmited via reinforced ribbing in the
cylinder block walls directly to the main bearings.
The DH10A engine has a drilling and nozzles for pis-
ton cooling.
The camshaft is journalled in seven bearings and is
driven via one of the timing gears from the engine
crankshaft. Its function is to operate the valves via push
rods and rocker arms.
The camshaft bearings range in size starting at the front
and gradually becoming smaller towards the rear. This
arrangement makes it easier to install the bearing bush-
ings in the cylinder block.
The following are the engine timing gears:
1. Crankshaft gear
2. Intermediate timing gear
3. Injection pump drive gear
4. Power steering oil pump drive gear
5. Camshaft gear
6. Space normally occupied by air compressor drive gear
7. Intermediate oil pump gear
8. Oil pump gear
The coolant pump is flange-driven from the oil pump
gear (8). Because the gears are hardended in different
ways, it is important when changing a gear that it is ad-
jacent to one of similar hardness. See further on page
72.
Components gear-driven from the engine have a very
high operational reliability.
4
3
2
1
7
8
