Injection Pump Timing
- With engine running at normal operating temperature, and transmission in park, open cover on diagnostic connector. Connect adapter from dynamic timing meter (Rotunda 078-00116).
- Observe RPM and injection timing. Correct injection timing is 3.5-6.5° BTDC at 1500 RPM. If injection timing is correct, test is complete.
- If injection timing is not correct, stop engine. Rotate engine until No.1 cylinder is on TDC. Remove injection pump distributor head plug bolt and sealing washer.
- Install adapter (D84P-9000-D) into injection pump. See Fig 1 . Mount dial indicator to adapter. Place at least .10" (.25 mm) of preload on dial indicator.
- Rotate crankshaft clockwise until dial indicator displays lowest value. At that point, set dial indicator to 0. Continue to rotate crankshaft until No. 1 piston is again at TDC (compression stroke).
- Record dial indicator reading. Correct indicator reading for a timing belt with less than 10,000 miles of wear is .0241-.0271" (.061-.069 mm).
- Correct indicator reading for a belt with more than 10,000 miles of wear is .0233-0.263" (.59-.67 mm). If timing is not to specification, install crankshaft holding tool (T84P-6400-B). Install timing adapter tool (T84P-9000-B) on injection pump. See Fig 2 .
- Loosen injection pump mounting bolts. See Fig 3 & Fig 4 . Rotate timing adapter tool clockwise to increase dial indicator reading, and counterclockwise to decrease reading.
- Tighten injection pump mounting bolts. Remove Injection pump timing adapter and flywheel holding tool. Rotate engine two complete revolutions until No.1 cylinder is on TDC. Check reading on dial indicator.
- If reading is correct, remove dial indicator and adapter. Install distributor head plug and washer. Tighten head bolt to 6-7 ft.lbs. (8-10 N.m.).
- If reading is incorrect, repeat steps 3)-10).
NOTE:
If injection pump adjustment settings have been changed, EGR vacuum regulator must be adjusted.