ROD AS-CONNECTING 8N1728 - Caterpillar

The camshafts must be correctly timed with the crankshaft before an adjustment of the unit injector lash is made. The timing pins must be removed from the camshafts before the crankshaft is turned or damage to the cylinder block will be the result.
The Electronic Control Module produces high voltage. To prevent personal injury make sure the Electronic Control Module is not powered and the unit injector solenoids are disconnected.
Specifications
Table 1
Parameter Value
Indicator Setting 64.34 mm (2.53 inch)
Injector Setting 0.00 0.20 mm (0.000 0.008 inch) References
Reference: Refer to Tool Operating Manual, NEHS0666, 9U-5132 Timing and Fuel System Setting Tool Group for additional information.Introduction
Use this procedure to adjust the fuel injectors.Required Tools
Digital Dial Indicator
Table 2
Tool Item Part Number Part Name Qty
T1 9U-5132 Engine Timing Tool Group
T1a 4C-8753 Extended Collet 1
T1c 8S-3675 Indicator Contact Point 1
T1d 9U-5138 Setting Gauge 1
T2 369-2607 Dial Indicator 1
T3 443-4177 Magnetic Fixture Gp
T3a 9U-6272 Nylon Screw 1
T3b 443-4174 Magnetic Fixture 1
T3c 443-4175 Rod As 1
T4 9U-5233 Magnetic Fixture Gp
T4a 9U-5137 Magnetic Fixture 1
T4b 9U-6272 Nylon Screw 1
T4c 122-0449 Rod Sleeve Extension 1
T4d 122-0451 Rod 1 Dial Indicator
Table 3
Tool Item Part Number Part Name Qty
T1 9U-5132 Engine Timing Tool Group
T1a 4C-8753 Extended Collet 1
T1b 6V-3075 Dial Indicator 1
T1c 8S-3675 Indicator Contact Point 1
T1d 9U-5138 Setting Gauge 1
T4 9U-5233 Magnetic Fixture Gp
T4a 9U-5137 Magnetic Fixture 1
T4b 9U-6272 Nylon Screw 1
T4c 122-0449 Rod Sleeve Extension 1
T4d 122-0451 Rod 1 Test Preparation - Digital Dial Indicator
Note: Calibration of the engine speed/timing sensor is not required unless the timing wheel has been removed from the camshaft or the Electronic Control Module (ECM) has been changed.This adjustment is critical. Ensure that the adjustment of the fuel injector is made properly.
Refer to Testing and Adjusting, "Crankshaft Position for Fuel Injector Adjustment and Valve Lash Setting". All the injectors can be checked or adjusted with the two crankshaft positions in the chart. This action will make sure that the pushrod lifters are off the lobes and on the base circles of the camshaft.Before a check or an adjustment can be made, the tooling must be set to the correct dimension.
Illustration 1 g06346380
(T1c) 8S-3675 Indicator Contact Point
(T1d) 9U-5138 Setting Gauge
(T2) 369-2607 Dial Indicator
(T3a) 9U-6272 Nylon Screw
(T3b) 443-4174 Magnetic Fixture
(T3c) 443-4175 Rod AsNote: Magnetic Fixture Gp (T4) that contains the Extended collet (T4c) and indicator contact point (T1b) can be used to raise the indicator above some interference points as needed.
Place rod (T3c) in fixture (T3b) in hole opposite open end. Install contact point (T1c) on digital indicator (T2). Install digital indicator (T2) in hole opposite open end of fixture (T3b). Screw in nylon screw (keep loose).
Make sure that the surfaces of the fixture (T3b) and gauge (T1d) are clean