TK 61552-2-MM-EN
73
Figure 43.
Crankcase Breather
1.
Breather Hose
5.
Baffle Breather
2.
Insulation
6.
Baffle Plate
3.
Breather Cover
7.
Intake Manifold
4.
O-Ring
8.
Restrictor Location
Normal crankcase pressures with a new air cleaner are 0 to 300 mm (0 to 12 in.) H
2
O of vacuum.
The vacuum will increase as the air cleaner gets dirty and becomes more restrictive. Check the air
restriction indicator before checking the crankcase pressure. Replace the air cleaner if the reading
on the air restriction indicator exceeds 508 mm (20 in.) H
2
O of vacuum. A dirty air cleaner may
cause excessive vacuum, leading to oil carry over and high oil consumption.
The crankcase breather and the breather hose should be inspected when the air cleaner element
is replaced to verify they are not plugged or damaged. Inspect the insulation to verify it is in place
and undamaged. The insulation is used to prevent freezing in cold weather.
The following items can affect the crankcase pressure readings:
Crankcase
Pressure
Effect
Typical Cause
Increase
Piston Rings Stuck or Worn
Increase
Breather Hose or Restrictor Plugged
with Dirt or Ice
Decrease
Air Cleaner Dirty or Plugged
EMI 3000 Air Cleaner
The EMI 3000 air cleaner is a dry element air cleaner. Replace the EMI 3000 air cleaner element at
3,000 hours or 2 years, whichever occurs first.
N
No
otte
e:: The severe duty air cleaner is similar to the EMI 3000 air cleaner but allows the air cleaner
element to be replaced at 4,000 hour intervals under normal operating conditions.
