Nominal size - 44.0-44.025 mm
2. Measure the outer diameter of the idle gear shaft.
Nominal size - 43.965-44.0 mm
3. Calculate the clearance between the shaft and the idle gear.
If the clearance is greater than the allowable (0.025-0.06, maximum 0.2mm) - replace the idle gear assembly with the shaft.
4. Smooth rotation of the injection pump drive gear bearing, replace if necessary.
5. Check the mesh clearance (nominal 0.02-0.15 maximum 0.2 mm) If at least one engagement is more than acceptable, replace all gears.
Balance shaft #1 - oil pump
Balance shaft No. 2 - injection pump
Crankshaft
Oil pump - crankshaft
HPFP - parasitic gear
Note: the parasitic gear for these checks must be without compensating gears.
6. If necessary, replace the crankshaft seals and injection pump drive gears, see section "Replacement of oil seals".