Mack MP7 - Rocker Arm Shaft and Engine Brake Installation

Page 218
REPAIR INSTRUCTIONS, PART 1
289
Figure 289 — Installing the Inlet Valve Yoke
3. Set the yokes on their respective valve
stems.
Rocker Arm Shaft and Engine Brake
Installation
[213 LP]
On engines with an engine brake, the exhaust
rocker arm includes an integral valve and piston.
For assemblies with the engine brake, use rubber
bands or tie straps to retain the pistons in the
exhaust rocker arms during installation. Failure to
heed this caution may result in severe engine
damage.
290
Figure 290 — Tie Strap Holding Engine Brake Piston
Rocker arms for exhaust valves without an engine
brake are similar to those for the inlet valve.
This procedure presumes that the rocker arms
have been correctly assembled on the rocker arm
shaft. Make sure the assembly remains in order
while lifting.
Alignment guide pins extend from the tops of the
camshaft upper bearing caps. Make sure these
are in place before attaching the rocker shaft.
1. Inlet Valves 2. Valve Yoke