MAINTENANCE OF THE M88A1 - OD1672
- LESSON 2/TASK 1
manifold heater fuel return solenoid valve (9) is located at the rear of the
engine. The valve is energized and acts as a check valve to prevent fuel
returning from the injector pump and nozzles from entering the heater fuel
Exhaust pipes (1) (figure 20, view A, on the following page) connect each
exhaust manifold to a turbosupercharger (figure 20, view B).
Each exhaust pipe has an insulated cover (2) which ensures retention of hot
temperature gases for the proper operation of the turbocharger.
gases are ejected from the engine, via the exhaust pipes, through deflector-
type louvers at the rear of the vehicle. The turbosupercharger contains an
impeller and a turbine, connected together by means of a solid shaft located
inside a metal housing. The exhaust gases emitted from the engine enter the
turbine side of the housing and impose a rotary motion on the impeller. As
the turbine turns, it rotates the shaft, which turns the impeller mounted on
the opposite side of the shaft. The impeller side of the turbosupercharger
serves to compress the air into the engine cylinders through the intake
Compressing air into the cylinders by the turbosupercharger
provides more air and therefore more oxygen for better combustion of the
fuel, enabling the engine to develop maximum power.
a. General. In addition to the daily preventive maintenance checks and
services (PMCS) performed by the vehicle operator, troubleshooting,
maintenance, adjustment, and repair of components is performed as a result
of a malfunction detected by the operator or through the regular maintenance
services performed by unit maintenance personnel.
In a shop situation, all pertinent technical manuals,
tools and test equipment should be available before
adjustment, and repair.