2753378 - 1084B18 engine oil pump, removed - check at bench

Dismantling ( Reassembling ) 1. Undo the bolts (1a) and remove the intake duct (1b).2. Remove the gasket.3. Undo the bolts (3a) and remove the oil pump cover (3b).

Use a percussion screwdriver to undo the above-mentioned bolts.

4. Remove the driven gear.5. Remove the drive gear.6. Undo the catch (6a) and remove the oil pressure relief valve (6b). 1. Remove crankshaft front oil seal with a suitable tool in the special groove Reassembling ( Dismantling ) 1. Check that the radial clearance between driven gear and pump casing is within the recommended limits

	Measurement		Value
1	Radial clearance between driven gear and pump casing (mm)		0.080 - 0.186

1. Check that the axial clearance between the upper side of the gears and the oil pump cover support plane is within the recommended limits.

	Measurement		Value
1	End float between upper side of gears and cover support surface (mm)		0.025 - 0.056

Check that the height of the spring for the engine oil pressure relief valve is within the recommended limits.

	Measurement		Value
-	Oil pressure relief valve spring height (mm)		34.1
	Under test load (daN)	4.45 - 4.94

Fit the limiting valve and fix it using the catch.Fit the drive gear.Fit the driven gear.Fit the oil pump cover.

Manually rotate the gears to check that they turn without sticking.

Fit the intake duct complete with gasket and fix it to the oil pump using the bolts.

Note: the crankshaft front oil seal must be fitted to the engine oil pump on the crankcase (see op.   1084B14  engine oil pump - r+r with power unit removed ).