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SETTING THE INJECTION ADVANCE

CHECKING AND SETTING THE INJECTION TIMING

1 Install the special maintenance tool SST and the dial gauge.

a) Remove the bolt from the injection pump timing cap plug.b) Install the special maintenance tool SST (plunger stroke

measurement tool reference: 970312378) and the dial gauge onthe hole for the timing cap plug.

2. Put the cylinder no. 1 or no. 4 piston between approximately 25°or more before dead top center of the compression stroke.

Turn the crankshaft pulley counter-clockwise so that the notch in thepulley is at 25° or more from the timing cap indicator.

3 Release the automatic cold start system.

a) Use a screwdriver to turn the cold start lever counter-clockwise byapproximately 20°.

b) Insert a metal plate (thickness 8.5 to 10 mm) between the cold startrelay and the thermal wax plunger.

4 Check the injection timing.

a) Adjust the dial gauge to 0 mm.b) Check again that the dial gauge is effectively on 0 mm while slightly

turning the crankshaft pulley clockwise or counter-clockwise.

c) Slowly rotate the crankshaft pulley clockwise until the notch of thepulley is aligned with the notch of the timing indicator.

d) Measure the plunger stroke.

Plunger stroke:0.46 mm

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If the recorded value is not within the tolerances:

e) Loose the following assembly bolts and nuts.

1) The 4 attachment nuts of the injection pipe coupling on injectionpump side.

2) The bolts securing the injection pump to the injection pump spacer .

3) The 2 attachment nuts securing the injection pump to the timinggear casing. 

f) Adjust the plunger stroke by gradually inclining the injection pumpbody. If the plunger stroke is less than the limits stipulated in thespecifications, incline the injection pump towards the engine.

If the plunger stroke is greater than the limits stipulated in thespecifications, incline the injection pump away from the engine.

g) Re-tighten the following assembly bolts and nuts.

1) The 2 attachment nuts securing the injection pump to the timinggear casing.

Recommended tightening torque:21 .N.m (210 kgf.cm)

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To remove the injection pump it is necessary to use the pulley extractor

Reference: 970 312 374

 2) The bolts securing the injection pump on the injection pump space.

Recommended tightening torque: 32 N.m (330 kgf.cm)* Verify the travel of the plunger piston

3) The four attachment nuts of the injection pipe coupling on injectionpump side.

Recommended tightening torque: 15 N.m (150 kgf.cm)

REMOVE THE STEEL PLATE

5 REMOVE THE SPECIAL MAINTENANCE TOOL SST AND DIALGAUGE

a) Remove the special maintenance tool SST and the dial gaugeb) Install a new gasket and the timing head cap bolt.

Recommended tightening torque: 25.5 N.m (260 kgf.cm)

6 START THE ENGINE AND VERIFY WHETHER THERE ARE ANY

LEAKS