Injection Pump Timing

Remove distributor head bolt on injection pump. Install special alignment tool (Part No. 09275-54010) and dial indicator to distributor head plug.
Set No. 1 or No. 4 cylinder to 45° BTDC on compression stroke. Set dial indicator at zero. Check to see that indicator stays at zero when crankshaft pulley is rocked slightly to left and right.
Turn pulley until No. 1 or No. 4 cylinder is at TDC. Injection timing should be as follows: On models prior to VIN numbers JT4LN44D5D1111497 and JT4LN44S3D1111500, plunger lift should be .046" (1.12 mm) for High Altitude models and .039" (1 mm) for all other models. On models after the above VIN numbers, plunger lift should be .046" (1.12 mm) for all models. If not, loosen injection pump bolts and all fuel connections.
Tilt pump body slightly and recheck injection pump stroke. When Correct, tighten bolts and fuel lines. Remove tools and install distributor head bolt and washer.

Fig 1: Injection Pump Timing Install special tool and dial indicator as shown.