Thermo King 002008, Manual

Page: 70 / 155

Engine Maintenance
70
Crankcase Breather
The crankcase breather is located on top of the
rocker arm cover. The crankcase breather system
ducts crankcase gases formed in the crankcase
directly to the air intake. Harmful vapors that
would otherwise collect in the crankcase and
contaminate the oil, or escape to the outside, are
drawn back into the engine and burned. A
restrictor is placed in the breather hose to limit the
flow gas flow from the crankcase to the intake and
keep the crankcase pressure from getting too low.
Normal crankcase pressures with a new air
cleaner are 5 to 10 in. (127 to 254 mm) H
2
O of
vacuum at 1450 rpm and 7 to 11 in. (178 to
279 mm) H
2
O of vacuum at 2200 rpm. The
vacuum will increase as the air cleaner gets dirty
and becomes more restrictive. The crankcase
breather and the breather hose should be inspected
when the air cleaner element is replaced to make
sure they are not plugged or damaged.
NOTE: The breather hose must be routed so it
slopes down from the crankcase breather to the
intake manifold. This prevents condensation
from collecting in the breather hose. The
condensation can plug the breather hose if it
collects and freezes in the hose.
Air Cleaner
Before the first quarter of 2001, a heavy duty, dry
element air cleaner was used on this unit. Replace
this air cleaner when the air restriction indicator
reads 25 in. of vacuum.
EMI 3000 Air Cleaner
The EMI 3000 air cleaner is a dry element air
cleaner. It became standard equipment on this unit
in the first quarter of 2001. Replace the EMI 3000
air cleaner element when the air restriction
indicator reads 25 in. of vacuum, or at 3,000 hours
or 2 years, whichever occurs first. The EMI 3000
air cleaner element has a nameplate that reads
“EMI 3000.” It cannot be interchanged with air
cleaners used on previous units, however it can be
retrofit on previous units by using the EMI 3000
Air Cleaner Assembly and the related
components.
Figure 45: EMI 3000 Air Cleaner Assembly
1.
Insulation (Covers breather Hose
to prevent freezing.)
2. Restrictor
3. Crankcase Breather
4. Air Restriction Indicator
5. Intake Manifold
6. Intake Air Heater
Figure 44: Crankcase Breather
2
3
4 5
1
6
1. Dust Ejector Must Point Down When Installed
Figure 46: EMI 3000 Air Filter Element
ARA189
1
ARA190