SERIES 60 SERVICE MANUAL 1.3.2 Removal of Rocker Arm Assembly Perform the following steps for rocker arm assembly removal: NOTE: If unit is equipped with Jake Brake®, remove brake. Refer to section 1.36.2. NOTE: Jake Brakes are not used on the Series 60G engine. 1. If necessary, steam clean the engine around the valve rocker cover and cylinder head mating area. NOTE: High pressure water or steam cleaning should be avoided in the valve rocker cover/cylinder head area of the Series 60 gas. The ignition system can be affected. 2. Remove the valve rocker cover. Refer to section 1.6.2 (one-piece), refer to section 1.6.3 (two piece), and refer to section 1.6.5 (three-piece). 3.
Remove the rocker arm shaft bolts (No. 2, 3, 4 or 5, 6, 7) and nuts (No. 1 or 8) that retain the rocker arm shaft assembly to the cylinder head. See Figure 1-54 for Series 60 diesel engine and see Figure 1-55 for Series 60 gas engine. For camshaft or cylinder head removal, both rocker arm shaft assemblies must be removed. NOTE: Whenever nuts No. 1 or 8 are loosened or removed, the torque on the corresponding rocker shaft stud must be checked. Torque to 126–146 N·m (93–108 lb·ft). All information subject to change without notice. (Rev. 2005) 6SE483 0507 Copyright © 2005 DETROIT DIESEL CORPORATION 1-67