BENDIX TCH-003-030 Manuel D’Utilisation
Technical
Bulletin
Bulletin No.: PRO-03-30
Effective Date: 1/1/91
Page: 1 of 3
Subject:
E-1 Single Circuit Brake Valve Obsolescence And
Changeover
When our current stock of E-1 brake valves is depleted, this valve will no longer be
available for service replacement, either as new or remanufactured exchange. Because
of this obsolescence, those vehicles currently using the E-1 single circuit brake valve will
be required to changeover to a currently produced brake valve.
available for service replacement, either as new or remanufactured exchange. Because
of this obsolescence, those vehicles currently using the E-1 single circuit brake valve will
be required to changeover to a currently produced brake valve.
Background
The E-1 brake valve is of single circuit design and was primarily used on pre-1975 transit
and parlor coaches because of its generous graduating range. The larger graduating
range of the E-1 requires greater treadle movement per pound of air pressure delivered.
This fact results in the driver being able to more easily control small increases or
decreases in braking pressure which is sometimes desirable in coach operation.
and parlor coaches because of its generous graduating range. The larger graduating
range of the E-1 requires greater treadle movement per pound of air pressure delivered.
This fact results in the driver being able to more easily control small increases or
decreases in braking pressure which is sometimes desirable in coach operation.
Changeover Options
While several changeover options are possible the most appropriate are:
1. The E-1 can be replaced with the E-3 single circuit brake valve.
2. The E-1 can also be replaced with the E-10 dual circuit brake valve.
2. The E-1 can also be replaced with the E-10 dual circuit brake valve.
Each changeover option has some positive and negative aspects to be considered
before a choice is made.
before a choice is made.