5031390 JOHNSON GASKET, THROTTLE BODY

Table 1
Required Tools    
Part Number     Part Name     Quantity    
8T-5300     Engine Timing Indicator Group     1    
8T-5301     Diesel Engine Timing Adapter Group     1    
Illustration 1 g00319643
8T-5300 Engine Timing Indicator Group (1) 8T-5250 Engine Timing Indicator (2) 5P-7366 Power Cable (3) 6V-2197 Transducer (4) 5P-7362 Cable (5) 6V-2199 Transducer Adapter and 6V-3093 Transducer Adapter (6) 8K-4644 Fuse The 8T-5300 Engine Timing Indicator Group must be used with the 8T-5301 Diesel Engine Timing Adapter Group.
Illustration 2 g00319663
8T-5301 Diesel Engine Timing Adapter Group (7) 5P-7437 Adapter (8) 6V-2198 Cable (9) 5P-7436 Adapter (10) 6V-7910 Transducer (11) 5P-7435 Adapter (12) 6V-3016 Washer
A high pressure fuel line must be disconnected. To avoid personal injury or fire from fuel spray, the engine must be stopped before the fuel line is disconnected.
When you check for the dynamic timing on an engine without a mechanical advance, Caterpillar Inc. recommends the recording of the calculations for the dynamic timing onto paper. Then, the service person can create a graph of the dynamic advance. Note: Order one Special Instruction, SEHS8140. Worksheets are available in pads of 50. See Special Instruction, SEHS8580 for additional information on calculating the timing curve.Note: For all engines that are regulated for emission control, use the dynamic timing at 1000 rpm to measure the static fuel injection timing. Also, use the dynamic timing at 1000 rpm to set the static fuel injection timing. Do not use the timing pin method for this measurement or for this setting. After the timing values are calculated and the timing values are plotted, the dynamic timing should be checked with the 8T-5300 Engine Timing Indicator Group. Follow these steps:
Operate the engine from 1000 rpm (base rpm) to high idle.
Continue running the engine now from high idle to 1000 rpm (base rpm).Unstable readings often appear below 1000 rpm.
Record the dynamic timing at each 100 rpm and at the specified rpm during acceleration and during deceleration.
Finally, plot the results onto the worksheet. Review the plotted values.Use Special Instruction, SEHS8580 to see the correct specifications for calculating the timing curve.You can find these specifications in three places:
The Operating Instructions inside the lid of the 8T-5300 Engine Timing Indicator Group
The Special Instruction, SEHS8580
The Engine Information Plate for the performance specification numberThe performance specification number can be used to refer to the Technical Marketing Information (TMI). Here, you will find the correct timing specifications to use.Engine Timing For Reduced Emissions and Improved Engine Performance
The performance of an engine can be improved with the correct fuel injection timing. When you are checking and adjusting timing the timing pin method is not as precise as the following methods.
Dynamic timing indicator
Fuel flow timing methodIncorrect measurements of the engine timing can lead to increased exhaust emissions, reduced engine performance and shorter engine life.Use the 8T-5300 Engine Timing Indicator to measure engine timing and set engine timing. Use pin timing to get as close as possible to the static timing. When you are using the dynamic timing indicator, plotting of the entire timing map is not necessary. Check the timing at 1000 rpm for this procedure.Note: During engine speeds over 1200 rpm, the entire map must be plotted in order to determine if the timing advance is working properly. Use 1,000 engine rpm to change dynamic timing to fuel injection pump static timing. Use the following references to break down the top level fuel pump.
TMI
Parts Manual
Service Information SystemAfter the initial checking of the fuel pump injection timing with the dynamic timing indicator, use the trial and error method to readjust the timing. Repeat the measurement. Set the static timing to 0.5 degrees.Note: The timing pin may not fit in the slot for the fuel pump camshaft. This is a normal result of using the dynamic timing indicator.Procedure for Timing Check
A high pressure fuel line must be disconnected. To avoid personal injury or fire from fuel spray, the engine must be stopped before the fuel line is disconnected.
Illustration 3 g00319821
Transducer in Position (10) Transducer (13) Fuel injection line for No. 1 cylinder
Loosen all fuel injection line clamps that hold No. 1 fuel injection line. Disconnect fuel injection line (13) at the fuel injection pump.
Slide the nut upward. Attach the 5P-7436 Adapter (9).
Tighten 5P-7436 Adapter (9) onto the pump bonnet. Turn adapter (9) onto the pump bonnet. Continue until the top of the bonnet's threads lines up with the bottom of the opening in adapter (9) .
Attach 5P-7435 Adapter (11) onto injection transducer (10). Then, connect 5P-7435 Adapter (11) in the opening of 5P-7436 Adapter (9) .
Place fuel injection line (13) on top of 5P-7435 Tee Adapter (11). Install 5P-7437 Adapter (7). Tighten the adapter (7) to a torque of no more than 40 N m (30 lb ft).
Illustration 4 g00319823
Transducer in Position (3) Transducer (5) Transducer adapter
Remove the plug from the flywheel housing. Ins