TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Engine Testing (Engine Dynamometer) (014-005)
Section 14 - Engine Testing - Group 14
Page 14-17
Pressure Gauge, Part No. ST-1273
To determine the amount of turbocharger boost, remove
the pipe plug in the air crossover tube.
Install the intake manifold pressure sensor or pressure
gauge, Part No. ST-1273.
Minimum Gauge Capacity:
1905 mm Hg
[75 in Hg]
Blowby Checking Tool, Part No. 3822476
Water Manometer, Part No. ST-1111-3
For accurate engine crankcase blowby measurement, in-
sert a blowby checking tool in the crankcase breather vent.
Connect a water manometer to the blowby tool. A pressure
gauge can be used in place of the manometer.
Minimum Gauge Capacity:
1270 mm H2O
[50 in H2O]
Vacuum Gauge, Part No. ST-434
To measure fuel filter restriction, connect vacuum gauge,
Part No. ST-434, to the injection pump inlet line.
Minimum Gauge Capacity:
760 mm Hg
[30 in Hg]
To be able to unload the compressor, connect a source of
compressed air to the unloader (1). This air line must
contain a valve between the source and the unloader.
NOTE: All air compressors manufactured by Cummins En-
gine Company, Inc. must be loaded during engine run-in.
All air compressors must be unloaded during the engine
performance check.
NOTE: The compressed air load in the accompanying il-
lustration must be attached to the air compressor outlet (2).
L-1315
