Renault Magnum engine. Manual - part 101

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Adjustment of unit pump injectors pre-travel

Check the torque of the injector flange attachment bolts without removing the rocker arm assembly.

Use tool

A = 0162

Tighten to torque.

See pages .

This operation is to be performed at each valve adjustment maintenance.

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Loosen the locknut and the adjuster.

Screw up the adjuster by hand until contact is made with the pump injector.

Tighten the adjuster through

2/3 of a turn to obtain a unit pump injector preload.

Tighten the locknut to torque while holding the adjuster.

See pages .

Make a mark on the rocker arm when adjustment is finished.

Perform the same operation on all the other cylinders.

Exhaust valve adjustment

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Without "Optibrake" / "Optibrake +"

Measure the valve clearances using feeler gauges.

See pages .

Loosen the locknut and the adjuster.

Adjust the clearance between the rocker arm and the valve yoke by means of screw.

Tighten the locknut to torque while holding the adjuster.

See pages .

Make a mark on the rocker arm when adjustment is finished.

Perform the same operation on all the other cylinders.

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Engine equipped with "Optibrake"

Before making the adjustment, press rocker arm

(1).

Compress valve spring

(2) to free the oil in the rocker arm.

Use a piece of rigid iron wire to make a hook

(A).