| Tools Needed | Quantity |
| 4C-6594 Timing and Fuel Setting Tool | 1 |
| 6V-3075 Dial Indicator | 1 |
| 6V-9058 Fixture Assembly | 1 |
| 8S-3675 Indicator Contact Point | 1 |
| 6V-9056 Setting Gauge | 1 |
| NOTICE |
|---|
The camshaft must be correctly timed with the crankshaft before an adjustment of fuel timing is made. The timing pin must be removed from the camshaft before the crankshaft is turned or damage to the cylinder block will be the result. |
- Refer to Crankshaft Positions For Fuel Timing And Valve Lash Setting. Ensure that the engine is in time. With the two crankshaft positions that are given in the table, all of the fuel injectors can be checked or adjusted. The setting will ensure that the pushrod lifters are off the lobes and on the base circles of the camshaft.
- Before a check or an adjustment of the fuel timing can be made, the tooling must be set to the correct dimension. Use the following procedure in order to set the tooling to the correct dimension:
- Install the 8S-3675 Indicator Contact Point (4) on the 6V-3075 Dial Indicator (1) .
Show/hide table
Illustration 1 g00359732
Adjustment of fuel timing tools
(1) 6V-3075 Dial Indicator. (2) 6V-9058 Fixture Assembly. (3) 6V-9056 Setting Gauge. (4) 8S-3675 Indicator Contact Point .
- Install the 6V-3075 Dial Indicator (1) with the 6V-9058 Fixture Assembly (2) onto the 6V-9056 Setting Gauge (3). Ensure that the magnetic base of the timing fixture is on the top surface and that the contact point is on the bottom step.
Note: The 6V-3075 Dial Indicator (1) has two or three dials that register. The larger dial has marks for every 0.01 mm (0.0004 inch). The red numbers on the dial are for minus readings. The black numbers on the dial are for plus readings. The smaller dial has marks for 1.00 mm (0.040 inch) (one complete revolution of the large dial).
Show/hide tableTable 2 Dial Indicator Setting Table Injector Part Numbers 184-2527 Fuel Injector Gp and earlier 224-9090 Fuel Injector Gp and later Engine Timing 14.0 degrees before top center 11.5 degrees before top center Fuel Timing Dimension
120.25 mm (4.734 inch)
121.3 mm (4.78 inch)Dial Indicator Setting
+ 2.05 mm (+ 0.081 inch)
+ 3.10 mm (+ 0.122 inch)Note: The setting dimension from the chart is a positive "+" number. Move the dial indicator into the collet until both dials register "0". Place the "0" on the large dial in the 12 o'clock position in order to facilitate reading the dial indicator. If the setting dimension is "0", tighten the collet. If the setting dimension is not "0", move the dial indicator farther into the collet until the large dial indicates the correct plus "+" setting. Then, tighten the collet.
- The engine may have injectors with different part numbers installed. Verify the part number of the injector that is being set. Set the indicator to the appropriate dimension that is listed in Table 2.
- Ensure that the top surface of fuel injector' retainer (5) and shoulder (6) are clean and dry.
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| Illustration 2 | g00557830 |
Fuel timing (5) Injector retainer (6) Shoulder on the fuel injector body (7) Fuel timing dimension | |
- Put the 6V-3075 Dial Indicator (1) that is installed in the 6V-9058 Fixture Assembly (2) into position on the fuel injector. Make sure that the magnetic base of the fixture is on the top surface of the fuel injector retainer and the contact point is on the top surface of shoulder (6) .
Note: The pointer on both dials on the dial indicator must indicate 0.00 ± 0.20 mm (0.000 ± 0.008 inch).
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| Illustration 3 | g00341584 |
Fuel timing tools in position Typical example (1) . (2) . (8) . (9) . (1) 6V-3075 Dial Indicator (2) 6V-9058 Fixture Assembly (8) Rocker arm adjustment screw (9) Locknut for the rocker arm adjustment screw | |
- If the dial indicator is within the range of 0.00 ± 0.20 mm (0.000 ± 0.008 inch), no adjustment is necessary. Proceed to Step 11.
- If the dial indicator is not within the range of 0.00 ± 0.20 mm (0.000 ± 0.008 inch), complete Steps 7 through 10.
- Loosen locknut (9) on the fuel injector that requires adjustment.
- Put the 6V-3075 Dial Indicator (1) that is installed in the 6V-9058 Fixture Assembly (2) into position on the fuel injector. Make sure that the magnetic base of the fixture is on the top surface of the fuel injector retainer and the contact point is on the top surface of shoulder (6) .
- Turn adjustment screw (8) until the dial indicator indicates "0".
- Tighten locknut (9) to a torque of 200 ± 25 N·m (150 ± 18 lb ft), and check the adjustment again. If necessary, perform this procedure until the adjustment is correct.
- Remove the timing pin from the crankshaft when the fuel timing check is completed.