4
INSTALLING AND REMOVING THE VALVE
REMOVAL
1. Block and hold vehicle by means other than the air
brakes. Drain the air system.
2. Disconnect the heater wire if the valve is so equipped.
Remove the automatic reservoir drain valve.
DISASSEMBLY
1. Remove the four (4) cover cap screws and lock
washers. Remove the cover and sealing ring.
2. NOTE: The heater and thermostat of the Bendix
®
DV‑2
™
drain valve (if 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.
3. Remove the valve guide.
4. Remove the inlet and exhaust valve.
5.
Remove the adapter and filter assembly (if filter is
present).
6.
Remove the filter retainer (if any).
7.
Remove the filter (if any).
INSTALLATION
1. Block and hold vehicle by means other than the air
brakes. Drain the air system.
2. To avoid early fouling at the DV‑2 valve, thoroughly
finish and clean the reservoir before installing the
drain valve.
3.
Aerate any tank thoroughly if any solvents have been
used in the cleaning process.
4.
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
1. Cleaning solvent may be used on metal parts. Rubber
parts should be wiped clean.
2. Inspect all parts for wear or deterioration. Discard the
filter screen, if present.
3. Replace all parts not considered serviceable during
these inspections.
4. Bendix maintenance kit part number 282134 contains
all parts necessary for servicing all models of the DV‑2
valve.
ASSEMBLY
1.
Before assembling the valve, apply a light film of grease
on the inlet valve seat.
2.
DO NOT APPLY OIL TO THE INLET AND EXHAUST
VALVE.
3. Place the sealing ring in the groove of the cover.
4. Place the valve guide over the inlet and exhaust valve.
5. Place the valve guide and inlet and exhaust assembly
into the cover. Note that the wire will project through
the exhaust port.
6. Place the body on the cover and install the cap screws
and lockwashers.
7. Install the adapter or pipe nipple in the appropriate port.
8. Install the drain valve in the reservoir and reconnect
the heater wire, if the drain valve is so equipped.
9. NOTE: Covers on the standard and heated drain
valves can be interchanged.
TESTING THE REBUILT AUTOMATIC
RESERVOIR DRAIN VALVE
Perform “Operating and Leakage Tests” as outlined in this
document.
SD‑03‑2501 Rev. 008 © 2017 Bendix Commercial Vehicle Systems LLC, a member of the Knorr‑Bremse Group •
10/17
•
All Rights Reserved
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