Removing And Installing Piston Rings - Man D 2842 LE 620 Repair Manual

Piston ring arrangement
Fig. 1
À Compression ring (double−sided keystone ring)
Á Compression ring (tapered compression ring)
 Oil scraper ring (bevelled−edge ring)
Removing piston rings
Fig. 2
Remove pistons with conrods.
Fit conrod in a vice, use protective jaws.
Set piston ring wrench to piston diameter.
Fig. 3
Apply piston ring wrench to piston ring joint and
disengage the piston ring from the piston ring
grooves.
Note:
The coiled spring expanders mean that the
oil scraper ring has greater tangential ten-
sion.
Carefully clean the piston ring grooves using saw-
dust. Do not damage the piston ring grooves.
Checking ring end clearance
Fig. 4
Insert the piston rings individually in the cylinders
and use a feeler gauge to determine the ring end
clearance.
If the ring end clearance is too great, replace the
piston rings.
Ring end clearance, see "Service Data".

Removing and installing piston rings

123
1
2
3
4
1
2
3