I ordered something like this only it's the Tank loco, and 3 4 wheel cars, The set also had a mehano steamer thrown in. I swear every FS set has an Esso tanker or a texaco tanker.
Clean the loco wheels and make certain the contact strips are touching them at all times. Oh, and give the poor little thing some oil while you have the shell off.
The older Lima sets are really good. I have a set of those red fuel wagons in my collection. The loco would make a good candidate for a SZD conversion?