TK 56433-5-MM-EN
51
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 20 in. (508 mm) 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.
Figure 51.
EMI 3000 Air Cleaner Assembly
Figure 52.
EMI 3000 Air Filter Element
Belts
Belts should be regularly inspected during unit pretrip
inspections for wear, scuffing, or cracking. Belt tension
should also be checked during scheduled maintenance
inspections. Belts that are too loose will whip and belts
that are too tight put too much strain on the belt fibers
and bearings.
Using Frequency Gauge P/N 204-1903 is the best
method to check belt tension. Other commercially
available tension gauges that measure the frequency or
the tension in pounds are also acceptable.
N
No
otte
e:: When using the frequency gauge P/N 204-1903,
place the probe near the belt with the LED
shining on the belt. Pluck the belt with a metal
tab as shown below to get an accurate reading.
Take three readings and average them.
Figure 53.
Using Frequency Gauge P/N 204-1903
1.
Probe
2.
Metal Tab
N
No
otte
e:: Do not attempt to remove or install belts without
loosening adjustments. Belts that are installed
by prying over pulleys will fail prematurely due
to internal cord damage.
