Operating instructions

11
RailKing Doodlebug Electric Engine
Traction Tire Replacement Instructions
Your locomotive is equipped with two neoprene rubber traction tires on each
powered truck block. While these tires are extremely durable, you may need to
replace them at some point.
Turn your engine upside down. If there are visible Phillips screw heads
between the truck frame and truck block (see Fig. 4), go to step A. If not, go to
step B.
A. Remove the two
Phillips screws that attach
the truck sides to the truck
block.
B. Remove the trucks
from the chassis and the
truck sides from the trucks
in order to slip the new
tire over the grooved drive
wheel. See Fig. 3 for
which screws you must
remove to do this.
Then:
1. Make sure the old tire has been completely removed from the groove in the
drive wheel, using a razor blade or small flathead screwdriver to pry away any
remains.
2. Slip the new tire onto the wheel. You may find it useful to use two small
flathead screwdrivers to stretch the tire over the wheel.
3. If you twist the tire while stretching it over the wheel, you will need to
remove and reinstall the tire. Otherwise your engine will wobble while
operating.
4. Make sure the tire is fully seated inside the groove. Use a razor blade to
trim away any excess tire that doesn’t seat itself inside the groove properly.
5. Reassemble in the reverse order.
Truck Screws
Figure 4. Area to Look for Screws