PISTONS, LINERS
46.
A.
Check the pistons and liners for damage and
wear.
A = 1.5 mm (0.06")
Measure the cylinder liners diameter at a
number of points round the circumference and at
several different heights between the top and
bottom dead centre positions. (B and C). Re-
place the pistons and the liners if the wear
amounts to 0.25 mm (0.01") or more.
Measure the piston diameter (A) at right angles
to the gudgeon pin hole and 7 mm from the bot-
tom edge. Calculate the maximum and minimum
piston clearance (the maximum and minimum
liner diameter minus the piston diameter).
44A.
Fit the two halves of the new bearing together
with an elastic cord and turn them so that the
locking tongues after pressing in fit into the ap-
propriate recess. NOTE! The halves should be
slightly staggered, see the diagram.
B.
Piston clearance (new): 0.09-0.13 mm
(0.0035"-0.005").
44B.
Press the bearings in with tool 884489 or using
a hydraulic press.
CENTRIFUGAL GOVERNOR
47.
Measure the piston ring gap with the new rings.
If the cylinder liner is not new the measurement
should be made below the bottom dead centre
position. For dimension, see “Technical Data’’.
45.
Clean the governor. Check that the weights (2)
do not bind on the shaft or that there is excess-
ive clearance between the shaft and the gov-
ernor weights. Check that the pin (1) slides free-
ly in the shaft. Finally, inspect both the ball
bearings (3).
48.
Measure the piston ring clearances in the piston
ring grooves. For dimensions, see “Technical
Data”.
Replace the ball bearings if they bind. Check
that all moving parts are oiled and move freely
before assembling in reverse order.
19
| Categories | Volvo Penta Manuals |
|---|---|
| Tags | Volvo Penta MD11C, Volvo Penta MD11D, Volvo Penta MD17C, Volvo Penta MD17D |
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| Copyright | Attribution Non-commercial |
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