Maintenance
3425−1/A1
RT-flex58T-D
Winterthur Gas & Diesel Ltd.
1/ 7
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
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 Four Piston Rings
2013-08
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