Table 5-3. Direct and General Support Maintenance Troubleshooting (Continued)
TEST OR INSPECTION
NOZZLE PRESSURE BELOW 90 PSI (Continued)
Inspect the pulsation tank.
If the O-rings are cracked or broken, replace them and go to Step 6c.
If the machined surfaces are nicked or scratched, replace the pulsation tank. Go to Step 6c.
If the pulsation tank is ok, go to Step 6c.
Inspect the heads.
If the machined surfaces are nicked or scratched, replace the heads and go to Step 6e.
If the head is warped or bent, replace it and go to Step 6e.
If the heads are ok, go to Step 6d.
Whenever the heads are removed, replace the head gaskets.
Inspect the valve plates and valves.
Figure 5-195. Valve Plate Disassembly
Place a screwdriver in the valve plate end notches and pry the plate open.