Engine Testing (Chassis Dynamometer) (014-002)
B3.9 and B5.9 Series Engines
Section 14 - Engine Testing - Group 14
The following procedure assumes that the lubricating oil
and fuel systems were correctly primed, the dipstick cali-
brated, and the engine filled to the correct levels with lu-
bricating oil and coolant during installation of the engine
into the chassis. If these systems were not serviced during
installation of the engine, refer to Procedure 014-006 for
instructions on priming the lubricating oil and the fuel sys-
tem requirements, and calibrating the dipstick. Refer to the
Operation and Maintenance Manual, B Series, Bulletin No.
3810205, for instructions on filling the lubricating oil and
the cooling systems.
The number of instruments and gauges required to perform
a chassis dynamometer test will vary according to the type
and the capability of the test equipment used.
Refer to the service tools listed at the beginning of this
To monitor an engine's performance correctly, record the
Exhaust back pressure
Lubricating oil pressure (vehicle instrument panel)
Coolant temperature (vehicle instrument panel)
Intake manifold pressure*
Inlet air restriction*
Engine speed (rpm) (vehicle instrument panel)
Fuel supply pressure.
*See the following for the Service Tools required and the
installation locations on the engine.