MAK M20, Operating Instructions Manual

Page: 294 / 456

Piston
Maintenance / Reassembly
A5.05. 02.10.01.01
M20
en / 17.06.1998 IB004785 2/3
02
Ĺ
3. Slacken the tightening screw (
fig. 1
/10)
until the piston insertion device (W4)
has been relieved and can be guided
freely over the piston rings.
4. Apply Molykote paste "G-Rapid Plus" to
the thread and contact surface of the
tightening screw (10).
5. Place the piston insertion device (W4)
over the piston ring zone and tighten
the tightening screw (10).
Attention:
Make sure the piston rings do not sit
on the outer edge of the ring groove
when tightening the tightening screw.
Eliminate any faulty gripping by
tapping the piston insertion device
slightly.
6. Check the floating position of the rings
by turning the piston insertion device
(W4).
7. Mount the piston assembly ring ( fig. 2 /
W3).
8. Mount the piston mounting/extraction
device (
fig. 3 /W1).
Attention:
Turn the crank pin to a favourable
installation position. The bottom end
must not knock against the crank pin
when being lowered.
9. Attach the piston (3) to the crane and raise it.
10. Carefully insert the bottom end in the cylinder liner with the cylinder number mark towards
the control side and
lower the piston exactly in the cylinder axis so that the bottom end
does not jam in the cylinder liner
.
11. Let the piston insertion device (
fig. 1
/W4) lie flush on the piston assembly ring (
fig. 2
/W3)
and
carefully
lower the piston further guiding the bottom end over the crank pin by hand.
1
10
W4
•
•
2
W3