Wheels and gears should be inspected every 10,000 miles for thermal checks, thermal cracks and wear. At each side door and end door is a bar which should be lowered and latched in place whenever the door is opened when the locomotive is in motion. When lowered the grills raise the level of a workman to facilitate working on the cylinder heads. See that the guards do not rub on the belts or vibrate loose. The 6 wheel trucks should be inspected every 100,000 miles for wear as indicated on Plate 2317.
Trucks are interchangeable.
The end of the truck frame which has the drop in it is always toward the outside end of the unit. Axles and journal boxes are not all interchangeable due to speedometer and speed governor drives. The journal box covers must be exchanged if the trucks are moved from front to rear, or vice versa. Make a visual inspection of the trucks every 10,000 miles. See Bulletin 1702.5 for truck tools.