SHOP MANUAL
Engine
Ch 1 page 158
The vehicle’s operating prole and area of usage also affect the crankcase gases and
oil mist in the engine.
Operating proles which affect this include crane operation, exhaust braking, accel-
eration, and rapid throttle actuation.
NOTE
The measurement should be carried out with a laden vehicle.
To check the engine crankcase pressure, a manometer shoud be used together with an adater which replaces
the oil filler cap.
Measurement:
The measurement should be carried out with a laden vehicle. Note the readings on the form.
1. Connect a hose between the adapter and manometer which is long enough for the manometer to be taken
into the cab.
2. Take the manometer into the cab and carry out the test as described below.
Measuring with throttle
3. Note the crankcase pressure when the vehicle is stationary, no throttle.
4. Drive the vehicle and rev the engine up to 1,900 rpm and note the crankcase pressure.
5. Repeat the procedure 3 times.
Measuring with exhaust brake (if installed)
6. Activate the exhaust brake on a downhill stretch.
7. Repeat the procedure 3 times.
Crankcase pressure measurement
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