How to replace the bearings of the generator in Lefeng

How do you check a generator armature & exciter field?

Measure the air gap between the exciter armature and exciter field. Nominal values are shown in Table 8. If the air gap is less than 0.02 inch (0.058 mm), 1) check generator-engine alignment, 2) check for bearing wear, 3) check for misalignment of the exciter armature or stator.

How do you lubricate a regreaseable bearing?

Regreaseable ball or roller bearings: In applications where regreaseable bearings are used, grease fill fittings and relief valves are incorporated into the bearing housing. Lubricate the bearings in accordance with the lubricating instructions attached to the generator. If a failure of a rotating rectifier is suspected, remove the exciter cover.

Can a single bearing generator be transported without rotor support?

Caution: Do not attempt to transport a single-bearing generator without maintaining proper rotor support. Failure to observe this warning can result in equipment damage. Caution: Blocking or restriction of normal air flow into or out of the generator may cause damage to the electrical windings.

How many bearings does a generator have?

The generator will contain either one or two bearings. Bearings are typically ball or roller type and are either 1) heavy duty double shielded bearings, greased for life or 2) regreaseable bearings, which contain fill and drain ports for easy lubrication. The main lead connection box houses the load lead terminals.

How do I reassemble a PMG stator?

Remove the exciter cover. Remove the rotating diode assembly and/or the exciter, if needed, as explained separately. Disconnect the PMG stator leads. Remove the four bolts that hold the PMG stator to the bearing bracket. Mark the location for reassembly, and remove the PMG stator.

What is a single bearing in a generator?

Note:The single bearing in the generator is constructed so it can slide in its bore, fore and aft to allow thermal expansion in the generator rotor and also to eliminate all strain from the crankshaft thrust bearing. A slip fit in the generator bearing pocket allows the rotor to have safe thermal expansion and contraction.