How To Clean The Crankcase Breather System - Perkins 4012 Manual

4
4012/16 Diesel

How to clean the crankcase breather system

Warning! Disconnect batteries or any other means of starting. Personal protective equipment must be worn.
Two crankcase breathers are fitted. They are mounted on the side of the thermostat housings.
1 Unscrew the wing nut (A1).
2 Remove top cover (A2).
3 Lift out the two wire mesh elements (A4) from the filter body.
4 Clean any oil sludge deposits from the breather body, cover and pipework.
Note: If there is an excessive amount of oil sludge, remove the unit for cleaning.
5 Wash the mesh elements in a suitable cleaning agent and shake dry. If compressed air is available blow dry.
Caution: If the mesh elements still retain a heavy deposit of oil sludge after cleaning, new elements must be
fitted to ensure breather efficiency.
6 Refit the mesh elements into the filter body.
7 Check the sealing joint is in good condition and replace if required. Fit the cover making sure it has located
on its dowel (A3).
8 Tighten the wing nut (A1).
User's Handbook, TSL 4186E, Issue 2 45