Maintenance
3425
−
1/A2
RT-flex58T-D
Winterthur Gas & Diesel Ltd.
Tools:
Key to Illustration:
1 Inside micrometer
94101
1 Piston ring
1 Feeler gauge
94122
2 Cylinder liner
1 Piston ring tensioning device
94338
3 Piston head
2 Claws for gastight piston ring
94338A
4 Claw
1 Equipment case
94356
with instruments for
measuring chrome layers
1 Micrometer (0
−
30 mm)
1 Calliper gauge
94357
Overview
1.
General
1/7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Determine wear rate of piston rings
1/7
. . . . . . . . . . . . . . . . . . . . .
3.
Measuring piston ring grooves
4/7
. . . . . . . . . . . . . . . . . . . . . . . . . .
4.
Removing piston rings
6/7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.
Fitting piston rings
7/7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.
Storage and handling of piston rings
7/7
. . . . . . . . . . . . . . . . . . . .
1.
General
For judging and evaluating the condition of cylinder liner, piston and piston rings
the following guidelines serve for a condition-based Maintenance for piston and
cylinder liner overhaul.
Wear rates strongly depend on operational factors, such as fuel in use, engine load
profile, ambient conditions etc.
By visual inspections, critical conditions of cylinder liners and piston rings can be
detected at an early stage. Further information to monitor the cylinder liner and pis-
ton ring conditions are given in the Operating Manual 0750
−
1 Lubricating Oils.
The information regarding measuring piston ring grooves helps to define if the
wear on piston ring grooves is within the given limits or if the piston head must be
reconditioned. For the maximum wear data see Clearance Table 0330
−
1 ’Piston
and Piston Rings’.
2.
Determine wear rate of piston rings
Measure the thickness of the chrome-ceramic coating of the piston rings as sched-
uled in 0380
−
1 to determine the wear rate and the remaining life time of the piston
rings.
Remark:
See suppliers operation manual for the usage of layer measurement tool
94356.
Piston Rings
Checking Wear of Piston Rings and Ring Grooves
with Three Piston Rings
2013-08
Summary of Contents for WARTSILA RT-flex58T-D
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