Perkins 400 Series Operation And Maintenance Manual page 67

SEBU7992-05
• Check the movement of the yellow core when the
engine is accelerated to the engine rated speed.
The yellow core should latch at the greatest
vacuum that is attained.
If the service indicator does not reset easily, or if the
yellow core does not latch at the greatest vacuum,
the service indicator should be replaced. If the new
service indicator will not reset, the hole for the service
indicator may be restricted.
The service indicator may need to be replaced
frequently in environments that are severely dusty.
Engine Crankcase Breather -
Replace
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
i02657627
Illustration 41
Typical example
(1) Screws for the breather cover
(2) Breather cover
(3) Spring
(4) Diaphragm and plate
(5) Spacer for turbocharged engines only
(6) Joint for turbocharged engines only
(7) Cavity
(8) Vent hole
1. Loosen the screws (1) and remove the breather
cover (2) from the valve mechanism cover.
2. Remove the spring (3). Remove the diaphragm
and plate (4).
3. For turbocharged engines, remove the spacer (5)
and the joint (6).
4. Clean the vent hole (8) and the cavity (7) in the
valve mechanism cover.
Make sure that the components of the breather as-
sembly are installed correctly. Engine damage may
occur if the breather assembly is not working
correctly.
5. For turbocharged engines, install a new joint (6)
and the spacer (5).
Maintenance Section
Engine Crankcase Breather - Replace
NOTICE
67
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