1. Remove the locking plate, screw and O-ring seal from the head of the injection pump. (This procedure may require removing and installing the intake manifold.)
2. Install the transfer pump pressure test adaptor in the head of the injection pump (see Figure 7-73).
3. Connect a pressure gauge that reads from 0 to 1034 kPa (0 to 150 psi).
4. Remove the electrical connector for the fuel shut-off solenoid at the injection pump.
5. Crank the engine and observe the gauge reading:
• If the gauge reading is more than 138 kPa (20 psi), go to step 6.
• If the gauge reading is less than 138 kPa (20 psi), perform the fuel supply checks (if the fuel supply checks good, replace the injection pump and re-check transfer pump pressure).
6. Install the electrical connector for the fuel shut-off solenoid at the injection pump.
7. If available, install a diesel injection timing meter (J 33300).
8. Start and run the engine, observing the gauge reading (see Figure 7-74):
• At idle speed, the gauge reading should be approximately 138 to 276 kPa (20 to 40 psi).
• As engine speed increases, the gauge reading should indicate a steady increase in pressure (injection timing should advance).
9. If transfer pump pressure does not increase steadily (and the fuel supply checks good), replace the injection pump and re-check transfer pump pressure).
10. Disconnect the pressure gauge and transfer pump pressure test adaptor.
11. Install the locking plate, screw and a new O-ring seal on the head of the injection pump. (This procedure may require removing and installing the intake manifold.)
12. Remove the diesel injection timing meter, if used.
