Paccar MX-13 – Installing rocker seats

1. Carefully install the rocker seats.
– Depending on the engine position, some rocker seats must be positioned against the pressure of the valve springs.
– The rocker seat will resist this spring pressure and therefore cannot be positioned correctly.
– By cranking the crankshaft 1/3 of a turn each time using the special tool (1903018), the rocker seats of the cylinders can be tightened to the specified torque:
1. Rocker seats of cylinders 1 or 6.
2. Rocker seats of cylinders 2 or 5.
3. Rocker seats of cylinders 3 or 4.



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