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 14-13
Inspect the engine for coolant leaks at connections, fittings,
plates, and plugs. Repair as necessary.
Water Manometer, Part No. ST-1111-3
Air Inlet Restriction
Connect a water manometer, Part No. ST-1111-3, to the
turbocharger air inlet pipe to test air restriction.
NOTE: The manometer connection must be installed at a
90-degree angle to the air flow in a straight section of pipe,
one pipe diameter before the turbocharger.
NOTE: A vacuum gauge, Part No. ST-434, can be used in
place of the water manometer.
Minimum Gauge Capacity:
760 mm H2O
[30 in H2O]
Pressure Gauge, Part No. ST-1273
Exhaust Restriction
Connect a mercury manometer to a straight section of the
exhaust piping near the turbocharger outlet to check ex-
haust restriction.
NOTE: A pressure gauge, Part No. ST-1273, can be used
in place of the mercury manometer.
NOTE: For automotive applications a tapped hole is pro-
vided on the inlet side of the catalyst for checking exhaust
restrictions.
Minimum Gauge Capacity:
254 mm Hg
[10 in Hg]
Attach the lubricating oil temperature sensor in the location
shown.
Minimum Gauge Capacity:
150 C
[302 F]
L-1311
