PUMP GP-ENGINE OIL 2315127 - Caterpillar

Misalignment of the rocker arm shaft will cause side loading on the unit injector and the valve bridges. This will cause abnormal wear on the unit injector tappet and on the valve bridge guides. Center the rocker arm shaft during installation of the rocker arm group.
This procedure will help to prevent misalignment between the rocker arm button and the unit injector tappet and between the rocker arm button and the valve bridge.
Applying pressure with the pry bar while applying torque to the bolts for the rocker arm shaft (1) Pry bar(2) Torque wrench1. Place a pry bar on either side of the rocker arm for the unit injector. Use the pry bar to move the rocker arm shaft assembly. Center the rocker arm button onto the unit injector tappet.2. Use the pry bar to hold the shaft assembly in place. Apply pressure with the pry bar while applying torque to the bolts for the rocker arm shaft.