Engine bod�
Description
Crank mechanism
Crankshaft
Cylinder head
The crankshaft is journaled in three main bearings
(
), or four main bearings (other engines). The
The cylinder head is manufactured of specially alloyed
cast iron. It is provided with replaceable valve seats for
the inlet valves.
axial bearing on consists of loose thrust wash-
ers placed at the rear main bearing. On the other en-
gines the rear main bearing cap is made of aluminium
and serves as thrust washers. The crankshaft is statically
and dynamically balanced and has induction hardened
bearing surfaces. At the front the crankshaft is fitted with
a key joint and at the rear with a flange on which the fly-
wheel is attached.
The cylinder head is screwed onto the cylinder block
with screws. The tightening of the cylinder head should
be done in three stages.
Cylinder block
The cylinder block is cast in one piece of specially al-
loyed cast iron.
Main and big-end bearings
The main and big-end bearings consist of steel shells
lined with bearing metal. The bearings are precision
milled and ready for installation. Two oversizes are
available as spare parts.
Pistons, piston rings
The pistons are manufactured of a light-weight metal al-
loy. They are fitted with three piston rings (chromium-
plated) - two compression rings and an oil ring.
Note: The thrust washers for the crankshaft�s axial bear-
ing are not available in oversize.
Camshaft
The injection pump is driven from the front part of the
camshaft by means of two or three separate cams (de-
pending on the number of cylinders).
Connecting rods
The connecting rods have I-sections. The piston bolt end
is through-drilled for lubrication of the gudgeon pin.
The feed pump is driven via an eccentric cam from the
rear of the camshaft.
Timing gears
Flywheel
The timing gears consists of cylindrical gears with be-
velled cogs.
The flywheel is screwed on a flange on the rear of the
crankshaft. It is statically balanced and fully processed.
The starter ring is shrunk onto the flywheel.
The camshaft and sea water pump are driven from the
crankshaft gear via an intermediate gear. The engine�s
oil pump is built into the intermediate wheel and is dri-
A flexible coupling with damper element of rubber is
screwed on the flywheel. The coupling transfers the
force to the reverse gear/S-drive.
ven via this. Regulator weights are suspended in the
front edge of the camshaft gear.
24
| Categories | Volvo Penta Manuals |
|---|---|
| Tags | Volvo Penta MD2010, Volvo Penta MD2020, Volvo Penta MD2030, Volvo Penta MD2040 |
| Download File |
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| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.25 out of 5)
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Pages 58 and 59 are missing from Volvo Penta MD2010 MD2020 MD2030 MD2040 Workshop Manual. I need only these pages at present!