lubricator, and nonpressure head, using the same holding fixture as for dismantling. Before applying the
reconditioned piston and non-pressure head to the cylinder, clean the cylinder walls and lubricate them
with a good grade of brake cylinder lubricant. If the nonpressure head gasket is in good condition, do
not replace it; simply clean the gasket face.
f. Valves. Clean, repair, and relubricate valvular parts of the equipment at regular intervals; do
not dismantle them while on the locomotive; rather remove and take them to a shop equipped for proper
cleaning, repairing, and testing.
Clean the dismantled valves and valve assembly with a hydrocarbon cleaning fluid and
dry them with air or a clean cloth. Soak felt lubricator parts in standard triple valve oil, and drain them.
Examine all rubber for wear, cracking, flatness of beads, and other damage. Repair or replace metal
parts as necessary. In reassembling, lubricate all friction surfaces except rotary valves sparingly with
standard triple valve oil. Lubricate rotary valves and valve seats with an oil having high surface tension
characteristics as prescribed in the appropriate reference. The rotary valve of the automatic brake valve
can be lubricated between periodic cleanings without removing the entire cylinder assembly portion.
The KM vent valve is equipped with a self-lubricating piston. After cleaning the piston,
remove the plug in its center and saturate the felt wick with standard triple valve oil.
Plugs in the oil ports of the independent brake valve self-lapping portion which lead to
the felt expander should be removed at regular intervals and the passages filled with standard triple
Sanders are checked before each trip to see that they operate properly and that the jets and the
vent port are not plugged. The sand control valve should be checked and cleaned annually or as
conditions require. Check the spring and replace it if it is weak. Clean all parts and place a small
amount of airbrake oil on the cup washer, O-ring, and composition rubber valve before reassembling.
2.10. FUEL PUMP ADJUSTMENT
The balance of power in the cylinders can be checked by measuring the maximum pressure and