2015/09/18 Caterpillar

New Slave Piston Lash Settings are Available for Heavy-Duty Diesel Engines {1129}

Usage:

Engine: 3406E (S/N: 5EK1-UP; 1MM1-UP; 2WS1-UP; 5DS1-UP; 6TS1-UP; 1LW1-UP) C-15 (S/N: MBN1-UP; 6NZ1-UP) C-16 (S/N: W1A1-UP; 7CZ1-UP) C-18 (S/N: CJP1-UP; MDP1-UP; MEP1-UP) C15 (S/N: BXS1-UP)

Truck Engine News SEBD6874, 11 December 2012, "New Slave Piston Lash Settings are Available for Heavy-Duty Diesel Engines". Disregard this article. See the article that follows.

Due to the introduction of Caterpillar's low emission engines, and the introduction of compression brakes for the engines, new slave piston lash settings are available. The charts in this article will summarize the lash settings for engines that are equipped with Pacbrake compression brakes and Jake Brake compression brakes.

For information that relates to the procedure that is used for adjusting the slave piston lash, refer to the Testing and Adjusting manual for your engine.

Slave Piston Lash Settings for Pacbrake Compression Brakes

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Table 1
Slave Piston Lash Settings Pacbrake Compression Brakes
Serial Number Prefix	Model Designation	Slave Piston Lash Setting
S/N:5EK1-UP S/N:6TS1-UP S/N:1LW1-UP S/N:5DS1-UP S/N:2WS1-UP S/N:1MM1-UP S/N:6NZ1-UP S/N:7CZ1-UP	P39A or P39B	0.84 ± 0.08 mm (0.033 ± 0.003 inch)
	P39A or P39B	0.84 ± 0.08 mm (0.033 ± 0.003 inch)
S/N:6NZ1-UP S/N:7CZ1-UP	P39C	Product Campaign ⁽¹⁾
S/N:MBN1-UP	P39D	0.97 ± 0.08 mm (0.038 ± 0.003 inch)

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^( 1 )

Contact Pacbrake for information that relates to the product campaign.

Slave Piston Lash Settings for Jake Brake Compression Brakes

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Table 2
Slave Piston Lash Setting Jake Brake Compression Brakes
Serial Number Prefix and Model Number ⁽¹⁾	Horsepower Rating	Slave Piston Lash Setting
S/N:2WS1-UP S/N:6NZ1-83125 S/N:9NZ1-UP S/N: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)
S/N:1MM1-UP S/N:7CZ1-03833 S/N:5DS1-UP Jake Brake 340B or Jake Brake 340C	All ratings	0.94 ± 0.08 mm (0.037 ± 0.003 inch)
S/N:1LW1-33333 Jake Brake 340B or Jake Brake 340C	410 hp or less	0.84 ± 0.08 mm (0.033 ± 0.003 inch)
S/N:1LW1-33333 Jake Brake 340B or Jake Brake 340C	435 hp or more	0.68 ± 0.08 mm (0.027 ± 0.003 inch)
S/N:5EK1-01820 ⁽²⁾ Jake Brake 340	435 hp or more	0.68 ± 0.08 mm (0.027 ± 0.003 inch)
S/N:4AS1-UP Jake Brake 340C	All ratings	0.68 ± 0.08 mm (0.027 ± 0.003 inch)
S/N:5EK1-UP ⁽²⁾ S/N:6TS1-UP Jake Brake 340A	410 hp or less	0.68 ± 0.08 mm (0.027 ± 0.003 inch)
S/N:5EK1-UP ⁽²⁾ S/N:6TS1-UP Jake Brake 340A	435 hp or more	0.76 ± 0.08 mm (0.030 ± 0.003 inch)
S/N:1LW33334-UP S/N:6NZ83126-UP S/N:9NZ1-UP S/N:7CZ03834-UP Jake Brake 340D	All ratings	0.64 ± 0.08 mm (0.025 ± 0.003 inch)
S/N:CJP1-UP S/N:MDP1-UP S/N:MEP1-UP S/N:W1A1-UP Jake Brake 340C	All ratings	1.02 ± 0.08 mm (0.040 ± 0.003 inch)
S/N:MBN1-UP S/N:C2A1-UP (10R-9846 only) Jake Brake 340D	All ratings	0.76 ± 0.08 mm (0.030 ± 0.003 inch)
S/N:BXS1-01545 Jake Brake 340C	All ratings	0.89 ± 0.08 mm (0.035 ± 0.003 inch)
S/N:BXS01546-UP Jake Brake 340E	All ratings	0.84 ± 0.08 mm (0.033 ± 0.003 inch)

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^( 1 )	Check the identification plate that is on the compression brakes casting in order to determine the model that is installed on your engine.
^( 2 )	Some of the early 3406E Engines 5EK1-01820 were built with either the 340 or the 340A compression brakes.