Volvo Penta D2-55, Руководство по ремонту

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Repair instructions
Condition test, engine
Compression test
Special tools: 885 484, 885 252 and 998 8539
A compression test is done, which shows the sealing
of the cylinders and valves, to assess the condition of
the engine in a simple, reliable manner.
• Warm the engine up, then stop it.
• Remove all the injectors and test each of the cylin-
ders in turn.
IMPORTANT! Observe the greatest possible
cleanliness, to avoid getting dirt in the fuel sys-
tem. Plug the connections for the disassembled
injectors and fuel pipes.
The compression pressure shall be read off at normal
starter motor speed, refer to “Technical data”.
Low combustion pressure in all cylinders indicates
worn cylinder bores and piston rings. If one cylinder
has lower compression pressure than the others, the
reason can be poor valve sealing, broken piston rings
or a damaged cylinder head gasket.
Insert adapter nos. 885 484 and 885 252 in the injec-
tor hole. Install a compression gauge 998 8539 in the
adapter, and carry out the compression test.
Engine fixture, fixing
Special tools: 885 485, 998 6485 or 856 927
Use fixture 885 485 to attach the engine to overhaul
stand 998 6485 or 856 927.
The fixture is attached to the right side of the engine
as illustrated below.
NOTE! It is important that the instructions regarding
number of attachment bolts and sizes are followed to
ensure secure engine attachment.
Bolts required:
1 pcs M10 x 35 mm
3 pcs M14 x 1.5 x 35 mm
Before the engine fixture can be mounted and the en-
gine attached to the overhaul stand, the right front en-
gine mounting, oil dipstick tube, oil cooler with oil filter
and turbo oil pipe (D2-75), must be removed from the
engine.