TM 5-2420-230-24-2
Section 14 - Engine Testing - Group 14
Engine Dynamometer Test - Performance Checking (14-03)
B Series Shop Manual
Page 14-19
Caution: If the lubricating oil pressure is not within
specifications, shut off the engine immediately. Either
excessively low or excessively high oil pressure will cause
engine damage. Correct the problem if oil pressure is not
within specifications.
Engine oil pressure must be a minimum of 69 kPa [10 psi]
at approximately 700 RPM.
Make sure the engine is at operating temperature.
Move the throttle lever to the ``FULL OPEN'' position.
Adjust the dynamometer load until the engine maintains
the rated RPM.
Allow the readings to stabilize. Read the horsepower.
Check all the gauges, and record the readings.
NOTE: The horsepower reading will not be accurate if the
lubricating oil temperature and fuel temperature are not
within specifications.
Lubricating Oil Temperature:
MIN 90C [190F]
Fuel Temperature:
MAX 42C [108F]
Check all gauges and record the data.
Caution: Do not shut off the engine immediately after it
has been loaded. It must be allowed to sufficiently cool.
Remove the dynamometer load completely, and operate
the engine at idle speed for 3 to 5 minutes. This will allow
the turbocharger and other components to cool.
NOTE: Idle periods longer than 5 minutes are to be avoided.
Shut off the engine after the cool-down period.
L-449
