Cummins HC Alternator HC634J

Turn off the anti-condensation heater (if fitted) and isolate from supply.

Remove the lower air inlet cover.

Remove the terminal box lid and side panel (left hand, viewed from NDE).

Disconnect the grease pipe (if fitted) from the bearing cartridge and the NDE bracket.

Use a 10 mm open spanner to disconnect the RTD sensor for bearing temperature (if fitted) from the bearing.

Measure air inlet temperature with alternator running

Check air flow rate and direction with alternator running

Check condition of air filter where fitted

Replace air filters where fitted

Inspect the fan for damaged vanes and cracks

Remove air filters from their frames

Is the new grease uncontaminated and of uniform whitish-beige colour?

Fit the grease gun and add the correct quantity of grease

Check for signs of wear, fretting, or other detrimental features

Inspect for damage to seals, grease leakage, or discoloration of the bearing races

Does the bearing need to be replaced?

Describe any issues found during inspection

Environmental and Cleanliness Check

Check environmental conditions and cleanliness

Measure ambient temperature inside

Measure ambient temperature outside

Check complete machine for damage, loose parts and earth bonds

Check guards, screens, warning and safety labels