TM 9-2815 -202-34
Avoid contact with hot manifolds, pulleys,
avoid personal injury.
Wear proper ear protection when running
engine can cause hearing loss or injury.
and other moving parts to
engine. Noise volume of
Protective turbocharger air inlet shield must be installed prior to doing
maintenance when engine is running and air inlet has been removed.
Contact with rotating blades will cause injury to personnel.
Run engine in clean area when air intake ducting is removed. Dirt, dust, and
particles in unfiltered air can enter engine and damage parts or cause mechanical
If crankcase pressure is excessively high, this pressure may exceed the capacity of
manometer. To prevent blowing liquid out of manometer, discontinue test if liquid
level approaches limits of manometer scale by closing manometer tube connector.
Start engine and operate at 1800 RPM FULL LOAD. Slowly open manometer tube connector (1)
attached to hose (6), while carefully observing liquid level in manometer tube.
A manometer measurement is the sum of the displacements from zero of the two
columns of liquid. The value expressed is in inches of water.
For models 7083-7391, 7083-7395, and 7083-7396, measurements must not exceed 4.5
inches of water at 2300 RPM, FULL LOAD.
For the 7083-7398 and 7083-7399, measurements must not exceed 1.5 inches of
water at 2300 RPM, FULL LOAD.
When manometer tube connector (1) has been opened one full turn, measure crankcase pressure
on manometer scale.
Move governor stop lever to NO-FUEL position to stop engine.
Disconnect hose (6) and remove adaptor (5).
Install oil level gage rod and tube.
END OF TASK