[double00]

One of the four wheeled bogies fitted to the diesel locomotive, emits a dull thumping like sound while traversing over the layouts' track!
Has any member experienced hearing this type of sound? and what caused it to happen.

 

[double00]

Model is a Fleischmann HO Class Warship. All plastic gears were checked for missing teeth, and none were found. Applying current of 12v d.c. to the Warship while removed from the track, resulted in the motor and gears smoothly turning and emitting a whirring sound. At this stage no apparent fault could be seen or heard.
Tyred wheels (4) on motorised bogy were checked and found to be in reasonable condition.
A slight excess of oil on gears and a slight film of grease cleaned off the four pole motor magnets. A general clean up of chassis and body was carried out together with all bogy wheels.

 

[double00]

It is certainly a puzzle, I have two models of the Warships a green and blue colour and both bought as new in the late 70s.
A thorough clean of the green model certainly stopped noise emitted while traversing over the track, while the blue coloured model still emits the sound.
Arrangements of the electrical wires around the motor itself if not correctly carried out, can restrict side movement if wires are not place above the motor casing.
Fleischmann's sales representative has indicated to me that cause of noise being generated by a faulty tyre - the Warship power bogy is fitted a tyre to each of the four wheels. I have contacted several authorized Fleischmann retailers for replacement tyres - no success so far for a reply.
Is tyre replacement an easy operation?