PUSHROD 5I7723 - Caterpillar

To prevent possible injury, do not use the starter to turn the flywheel. Hot engine components can cause burns. Allow additional time for the engine to cool before measuring valve clearance.
This engine uses high voltage to control the fuel injectors.Disconnect electronic fuel injector enable circuit connector to prevent personal injury.Do not come in contact with the fuel injector terminals while the engine is running.
Failure to follow the recommended procedure or the specified tooling that is required for the procedure could result in damage to components.To avoid component damage, follow the recommended procedure using the recommended tools.
The engine valve lash and the injector lash must be within specifications prior to adjusting the compression brake slave piston lash. Refer to Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust" for the correct procedure for inspection of the engine valve lash. Refer to Testing and Adjusting, "Electronic Unit Injector - Adjust" for the proper procedure for inspection of the injector lash adjustment.Note: The slave piston lash adjustment must be performed while the engine is cold. If the engine is warm, allow the engine to cool prior to performing the following adjustments.Use the following procedure to adjust the slave piston lash on cylinders 1, 3, and 5:Put the No. 1 piston at the top center position on the compression stroke. See Testing and Adjusting, "Finding Top Center Position for No. 1 Piston" for further details.Jake Brake Compression Brake Adjustment
Illustration 1 g00596577
Typical configuration for Jake Brake engine compression brake
(1) Adjustment screw for the slave piston
(2) Slave piston
(3) Rocker arm
Prior to adjusting the lash setting for the engine compression brake, check the identification plate that is on the compression brake casting in order to determine the model that is installed on your engine. You must have this model number and the engine serial number prefix in order to determine the lash setting for your engine.
Table 1
Slave Piston Lash Setting
Jake Brake Compression Brakes
Serial Number Prefix and Model Number(1) Horsepower Rating Slave Piston Lash Setting
2WS1-UP
6NZ1-83125
9NZ1-UP
C2A1-Up (Excluding 10R-9846)
Jake Brake 340B or Jake Brake 340C 410 hp or less 0.94 0.08 mm (0.037 0.003 inch)
435 hp or more 0.84 0.08 mm (0.033 0.003 inch)
375/435 hp Multitorque rating 0.84 0.08 mm (0.033 0.003 inch)
1MM1-UP
7CZ1-03833
5DS1-UP
Jake Brake 340B or Jake Brake 340C All ratings 0.94 0.08 mm (0.037 0.003 inch)
1LW1-33333
Jake Brake 340B or Jake Brake 340C 410 hp or less 0.84 0.08 mm (0.033 0.003 inch)
435 hp or more 0.68 0.08 mm (0.027 0.003 inch)
5EK1-01820(2)
Jake Brake 340 435 hp or more 0.68 0.08 mm (0.027 0.003 inch)
4AS1-UpJake Brake 340C All ratings 0.68 0.08 mm (0.027 0.003 inch)
5EK1-UP(2)
6TS1-UP
Jake Brake 340A 410 hp or less 0.68 0.08 mm (0.027 0.003 inch)
435 hp or more 0.76 0.08 mm (0.030 0.003 inch)
1LW33334-UP
6NZ83126-UP
9NZ1-UP
7CZ03834-UP
Jake Brake 340D All ratings 0.64 0.08 mm (0.025 0.003 inch)
CJP1-UP
MDP1-UP
MEP1-UP
W1A1-UP
Jake Brake 340C All ratings 1.02 0.08 mm (0.040 0.003