Take special care when you clean
aluminum alloy parts. Some cleaning solvents
will attack and corrode aluminum. Mineral
spirits is a good neutralizer after using cleaning
After you complete] y clean and inspect the pump
and the parts of it, reassemble the pump as prescribed
by the manufacturers manual. In all assembly
operations, be careful to remove burrs and use a good
pressure lubricant on the mating surfaces during all
pressing operations. A good pressure lubricant aids in
pressing and prevents scoring and galling. Use flat steel
washers. They go next to the aluminum to prevent
goring by the spring steel lock washers.
The PT fuel pump is mounted on a test stand, as
shown in figure 5-35. In the test, the pressure from the
PT pump is measured and adjusted before the pump is
placed on the engine. To test this pump, let pressure
develop across the special orifices in the orifice block
assembly. The pressure is measured on the gauges
Figure 5-35.-PT pump mounted on test stand.
Figure 5-34.-Cummins PT fuel pump.