3
Upon investigation, parts showing signs of wear or
deterioration should be replaced.
If there is a filter screen in the adapter fitting it should be
removed and discarded.
SERVICE CHECKS
OPERATING TEST
With system charged, make several foot valve applications
and note each time an application is made, an exhaust of
air occurs at the exhaust port of the drain valve. If no air
comes out, push the wire stem. If no air comes out, there
may be a plugged filter in the adapter which should be removed
and discarded.
LEAKAGE TEST
With system charged and pressure stabilized in system,
there should be no leaks at the drain valve exhaust
.
A constant
slight exhaust of air at the drain valve exhaust could be
caused by excessive leakage in the air brake system.
If the DV-2
™
automatic drain valve does not function as
described or if leakage is excessive, it is recommended
that it be replaced with a new or remanufactured unit or
repaired with genuine Bendix parts.
INSTALLING AND REMOVING
REMOVING
Block and hold vehicle by means other than air brakes. Drain
air system.
Disconnect heater wire if valve is so equipped. Remove
automatic reservoir drain valve.
DISASSEMBLY
Remove 4 cap screws and lock washers. Remove cover and
sealing ring.
NOTE: The heater and thermostat of the DV-2
™
valve’s so
equipped are not serviceable. If the heater or
thermostat has failed, the entire cover must be
replaced. Do not remove the thermostat cover plate.
It is moisture sealed and removal could result in
early thermostat failure.
Remove valve guide.
Remove inlet and exhaust valve.
Remove adapter and filter assembly (if filter present).
Remove filter retainer (if any).
Remove filter (if any).
INSTALLING
Block and hold vehicle by means other than air brakes. Drain
air system.
To avoid early fouling at the DV-2
™
valve, thoroughly finish
and clean the reservoir before installing the drain valve.
Aerate any tank thoroughly if any solvents have been used
in the cleaning process.
IMPORTANT
When installing a DV-2
™
drain valve equipped with a heater
and thermostat, first determine if the vehicle electrical system
is 12 or 24 volt, and that the heater/thermostat unit is of the
same voltage. The #14 gauge lead wire on the valve should
be connected to the “on” position of the engine control or
ignition switch. Use an 8 amp fuse for one valve, a 15 amp
fuse for two valves, and a 20 amp fuse for three valves. All
electrical connections must be waterproof.
CLEANING AND INSPECTION
Cleaning solvent may be used on metal parts. Rubber parts
should be wiped clean.
Inspect all parts for wear or deterioration. Discard filter screen
if present
.
Replace all parts not considered serviceable during these
inspections.
Bendix Field Maintenance Kit 282134 contains all parts
necessary for servicing all models of the DV-2
™
valve.
ASSEMBLY
Before assembling the valve, apply a light film of grease on
inlet valve seat.
DO NOT APPLY OIL TO THE INLET AND EXHAUST VALVE.
Place sealing ring in groove of cover.
Place valve guide over inlet and exhaust valve.
Place valve guide and inlet and exhaust assembly into cover
(wire will project through exhaust port).
Place body on cover and install cap screws and lockwashers.
Install adapter or pipe nipple in appropriate port.
Install drain valve in reservoir and reconnect heater wire if
drain valve is so equipped.
NOTE: Covers on the standard and heated drain valves can
be interchanged.
TESTING REBUILT AUTOMATIC RESERVOIR DRAIN
VALVE
