Just curious to see what others would do…
I’ve just purchased a new Bachmann Spectrum Russian Decapod. (Well, 3, actually for road switchers).
One of them has a very soft “thumping” sound. At lst it was annoying (and concerning) just because it was there. It’s quite soft but at high speed it reverberates through the plywood subroadbed (bare benchwork-no scenery yet). I think I could get used to it. The other two though are smooth and silent. The loco runs like a champ otherwise (see below):
I broke the loco in for about 20 minutes in ea. direction. It had a fairly typical for Spectrums, very stiff initial start and hesitant “go”.
I initially lubed the rods, etc. externally. I checked to be sure the factory gear grease (internal) was present and not dried out. I did see a few very small bits of black plastic in the grease as if the gear had had contact with the driver cover plate briefly, probably causing the initial jerky starts.
So… I’m trying to decide whether or not to send it back for an exchange, see if it “blows up” somehow and just send it to Bachmann for repair/replacement later or what.
I ran it for 2 1/2 hr.s straight last night. lst at full speed then at slowest possible for grades. It runs like a champ just thumps. I’ve read about thumping being a sign of a broken drive gear but that doesn’t seem to be the issue from peeking under the drivers retaining plate, but can’t be sure as I couldn’t see the worm gear.
I checked wheel gauges and the pilot truck wheels are securely in their clip. Visually nothing seems to be out of round although I haven’t taken a micrometer to the drivers or anything. No rods seem to be binding. The wheels and drivers come in contact with a glass surface. The tender also.
What would you do? Would you just see how it goes seeing as it seems to run fine or go through the hassle of contacting the store, packaging up and mailing?
I’m kinda thinking that wit