12 RailKing GP-20 Diesel Engine
Maintenance
The engine should be well oiled and greased in order to run properly.
Regularly lubricate all axles and linkage components and pickup rollers to prevent
squeaking. Use light household oil, such as that found in M.T.H.'s
maintenance kit. Do not over oil. Use only a drop or two on each
pivot point.
DO NOT
OVER OIL
Body Mount Screws
Motor Mounting Screw
Figure 5: Body Removal Screw Locations
The locomotive’s internal gearing was greased at the factory and should not need
additional grease until after 50 hours of operation or one year, whichever comes first.
Follow the greasing instructions below. Note that in some tightly packed engines you
may need to move internal components temporarily in order to access the gears.
1. To access the gear box, remove the cab from the chassis by unscrewing the chassis
screws as seen in Figure 5 and lifting the cab from the chassis.
2. Once the cab is removed, remove the trucks by unscrewing the black Phillips motor
mount screw located on the underside of the drive trucks (see Fig. 5).
3. Once the motor mount screw has been removed, pull the motor away from the truck
block and lightly coat the motor worm gear and bronze drive gear (in the truck block)
with grease.
4. Reassemble the truck and motor, being careful not to pinch any wires between the
truck block and motor mount.
Lubricating and Greasing Instructions
