Engine body
4.
Turn round the crankshaft until the piston in ques-
tion is in the lower turning position. Dismantle the
main bearing cap with lower bearing cup.
In�pec�ion and ma�ching of pi��on �ing�
Check the wear surfaces and sides. Black patches on
the surfaces imply poor contact and indicate that it is
time to change the piston rings. The oil consumption is
also a critical factor as to when a piston ring should be
replaced.
Check the piston ring gap (Fig. 41). Push down the ring
below the lower turning position by means of a pis-
ton. Replace the piston ring if the gap exceeds 1.0 mm
(.039
in).
Fig. 39. Dismantling of piston
5.
Place a pair of plastic hoses as protection over the
connecting rod screws. Carefully tap up the con-
necting rod with piston far enough so that the pis-
ton rings are released from the cylinder bore. Lift off
the piston together with the connecting rod.
Note: Scrape off the soot strip in the top part of the
cylinder bore to simplify dismantling.
6.
Dismantle piston ring with a piston ring tongs.
Fig. 41. Checking of piston ring gap
Piston rings should also be replaced if there is noticea-
ble wear or out-of-roundness in the cylinders since the
rings seldom have the same position as they had before
dismantling.
Check the piston ring gap also on new rings.
See "Technical data" for size info.
Check the clearance in the piston ring groove. Roll the
ring in its groove in the piston and measure the clear-
ance at a number of points with a feeler gauge.
Fig. 40. Dismantling of gudgeon pin
Remove the for the gudgeon pin and dis-
7.
mantle the gudgeon pin carefully with a suitable
mandrel.
35
| 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)
Marine readers have rated Volvo Penta MD2010 MD2020 MD2030 MD2040 Workshop Manual 4.3 out of 5.0 based on 4 product reviews. GOOD AND GOODER S=GOODEST. IS BESTER
jeg skal bruge manualen , til at samle min Volvo penta md 2030 igen.
Ö, hur dka jag veta om det är bra innan jag set produkten.
Pages 58 and 59 are missing from Volvo Penta MD2010 MD2020 MD2030 MD2040 Workshop Manual. I need only these pages at present!