Perkins Phaser Series - Page 179

ASPIRATION SYSTEM 18
Closed breather system
A closed breather system is fitted to some naturally
aspirated 1000 Series engines. The closed breather
system has an oil separator which is fastened to
the crankcase and a breather valve is fitted
between the oil separator and the induction
manifold. Crankcase gases pass through the oil
separator where oil from the gases is returned to
the sump. The crankcase gases then pass through
the breather valve to the induction manifold.
To clean the closed breather
system18A-06
1 Release the hose clips and remove the breather
valve (A2).
2 Release the short setscrew (A3) and the long
setscrew (A5) and remove the oil separator (A4).
3 Wash the oil separator with approved cleaning
fluid and dry it with low pressure air.
Caution: Do not put the breather valve completely
into the cleaning fluid.
Warning! Do not direct compressed air at your
skin, if compressed air enters your skin obtain
medical help immediately.
4 The breather valve does not normally need to be
cleaned. If the inside of the breather valve is to be
cleaned, insert an approved cleaning fluid into the
valve through the pipe at the bottom. Drain the fluid
from the breather valve.
Dry the breather valve with
low pressure air.
5 Check that the inside of the upper pipe (A1) is
clean. If the pipe is not clean, release the flange
setscrews (A6) and remove the pipe. Wash the pipe
with kerosene and dry it with low pressure air.
6 Ensure that the contact faces of the upper pipe
flange and the induction manifold are clean.
7 Fit the upper pipe complete with a new joint and
tighten the flange setscrews.
8 Renew the "O" ring (B1) at the bottom of the oil
separator. Clean the bore in the cylinder block for
the "O" ring of the oil separator. Lightly lubricate
the "O" ring and fit the oil separator to the cylinder
block. Fit the setscrews for the oil separator in their
correct positions and tighten them.
9 Fit the breather valve and tighten the hose clips.
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PA241
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Perkins Phaser/1000 Series, April 1995 18A.13