C15 On-highway Engine Caterpillar

Jake Brake Compression Brake

Note: There is a fastener group that utilizes hex head bolts for the installation of the compression brake to the cylinder head. If your compression brakes utilize hex head bolts, refer to Specifications, "Compression Brake" for this type of fastener group.

Installation Information for Fastener Group That Uses 12 Point Head Bolts

Illustration 1	g01105404
Typical example Top view with compression brake

Illustration 2	g01342069
Torque sequence

Note: The installation of the compression brake must be completed prior to adjusting the valve lash, the injector lash, or the compression brake's slave piston lash.

1. Place the compression brake over the taperlock studs and onto the engine.

2. Install the hard washers and four bolts (1), (2), (3), and (4) through the engine brake housing group. Finger tighten the four bolts.

3. Install the hard washer and nut (5). Finger tighten the nut.

   Note: Use the torque sequence that is shown in Illustration 2.

4. Tighten four bolts to 50 ± 7 N·m (37 ± 5 lb ft). Turn the bolts through an additional 90 ± 5 degrees.

5. Tighten the nut to 50 ± 7 N·m (37 ± 5 lb ft). Turn the nut through an additional 90 ± 5 degrees.

Illustration 3	g01640893
Typical example Top view with compression brake

Before the compression brake's slave piston is allowed to contact the bottom of the housing bore, the free running torque of slave piston adjustment screws (1) must not exceed the following value. ... 3 N·m (27 lb in)

(2) Final torque for two full nuts ... 34 ± 5 N·m (25 ± 4 lb ft)

(3) Final torque for three taperlock studs ... 65 ± 10 N·m (48 ± 7 lb ft)

(4) Final torque for the solenoid ... 20 N·m (15 lb ft)

Slave Piston Lash Settings

Note: Refer to Testing and Adjusting, "Slave Piston Lash - Adjust" for the complete procedure for adjusting the slave piston lash.

Note: The slave piston lash setting is specific to the model number of the compression brake and to the serial number prefix of the engine. Use these settings only for the compression brakes and the serial number prefixes that are specified in the table.

Pacbrake Compression Brake

Note: There is a fastener group that utilizes hex head bolts for the installation of the compression brake to the cylinder head. If your compression brakes utilize hex head bolts, refer to Specifications, "Compression Brake" for this type of fastener group.

Installation Information for Fastener Group That Uses 12 Point Head Bolts

Illustration 4	g01097996
Typical example Top view with compression brake

1. Place the compression brake over the taperlock studs and onto the engine.

2. Install the hard washers and four bolts (1), (2), (3), and (4) through the engine brake housing group. Finger tighten the four bolts.

3. Install the hard washer and nut (5). Finger tighten the nut.

   Note: Use the torque sequence that is shown in 4.

4. Tighten four bolts to 50 ± 7 N·m (37 ± 5 lb ft). Turn the bolts through an additional 90 ± 5 degrees.

5. Tighten the nut to 50 ± 7 N·m (37 ± 5 lb ft). Turn the nut through an additional 90 ± 5 degrees.

Illustration 5	g01640349
Typical example Top view with compression brake

Before the compression brake's slave piston is allowed to contact the bottom of the housing bore, the free running torque of slave piston adjustment screws (5) must not exceed the following value. ... 3 N·m (27 lb in)

(6) Final torque for two full nuts ... 34 ± 5 N·m (25 ± 4 lb ft)

(7) Final torque for three taperlock studs ... 65 ± 10 N·m (48 ± 7 lb ft)

Slave Piston Lash Settings

Note: The slave piston lash settings are specific to the serial number of the engine. Use this setting only for the serial number that is specified in the table.

Note: Refer to Testing and Adjusting, "Slave Piston Lash - Adjust" for the complete procedure for adjusting the slave piston lash.