Bendix Commercial Vehicle Systems SMS-9700 User Manual

Bendix® SMS-9700™ Accessory Solenoid Manifold

SD-03-10432

NORMALLY

CLOSED (NC)

SOLENOID

(BLACK)

ELECTRICAL

CONNECTOR STYLE

FOR LATCHING

(GRAY) OR NC

(BLACK) SOLENOIDS

DELIVERY

PORT

EXHAUST

PORT

PUSH-TO-CONNECT

RINGS

COMMON RAIL

LATCHING

BANK (GRAY)

ELECTRICAL

CONNECTOR FOR

NO (NATURAL)

SOLENOIDS

NORMALLY
OPEN (NO)

SOLENOID

(NATURAL)

SUPPLY PORT

MOUNTING

HOLES

COMMON RAIL

SUPPLY PORT

ELECTRICAL

CONNECTOR

Normally Closed Function (NC) - No air passes through
the valve when electrical current is not present.

Normally Open Function (NO) - Air passes through the
valve when electrical current is not present.

LATCHING

BANK (GRAY)

FIGURE 1 - BENDIX® SMS-9700™ ACCESSORY SOLENOID MANIFOLD

DESCRIPTION

The Bendix® SMS-9700™ accessory solenoid manifold is
a bank of low air fl ow solenoids used to control devices
such as suspension dump, differential locks, transmission
controls and other piloted chassis functions. Each solenoid
is controlled by an electrical switch inside the cab of the
vehicle.

Identifying the type of solenoid is essential for servicing
and troubleshooting. Note that the individual solenoids in
the bank can be replaced, but not repaired.

BENDIX® SMS-9700™ ACCESSORY SOLENOID
MANIFOLD

The SMS-9700 accessory solenoid manifold is a stackable
assembly with up to fi ve normally open (NO), normally
closed (NC), or latching solenoid banks that can control
various accessories. These banks can be identifi ed by
the electrical connector type and/or color (black, gray or
natural), and delivery port pairings. See Figure 1.

The push-to-connect (PTC) rings come in a variety of colors
and are used for OE installation purposes and do not depict
features, or function, of the solenoid valve.

1

INTERAXLE

LOCK SWITCH

DIFFERENTIAL
LOCK SWITCH

PTO SWITCH

TYPICAL

IN-CAB SWITCHES

SUSPENSION DUMP SWITCH

BENDIX® SMS-9700™ ACCESSORY

SOLENOID MANIFOLD

PRESSURE

PROTECTION

VALV E

SUPPLY

RESERVOIR

FIGURE 2 - TYPICAL SYSTEM CONFIGURATION

OPERATION

Because these solenoid valves are used for auxiliary
air functions, a pressure protection valve, such as a
Bendix® PR-3™ valve, must be installed to protect the
air brake system. The solenoids will deliver, exhaust,
or latch air pressure to provide various functions on the
air brake vehicle. See Figure 2 for a typical system

configuration.

PREVENTIVE MAINTENANCE

Important: Review the Bendix Warranty Policy before
performing any intrusive maintenance procedures. The
warranty may be voided if intrusive maintenance is
performed during the warranty period.

No two vehicles operate under identical conditions; as
a result, maintenance intervals may vary. Experience is
a valuable guide in determining the best maintenance
interval for air brake system components. At a minimum,
the solenoid should be inspected every six (6) months or

Sample identifi cation label located on the back of the
solenoid mounting bracket. Each OE manufacturer will
have different labeling requirements.

1500 operating hours, whichever comes fi rst, for proper
operation. Should the solenoid not meet the elements
of the operational tests noted in this document, further
investigation and service of the valve may be required.

SERVICE CHECKS

These service instructions are a general guideline, and
should be consulted in conjunction with the OEM's service
manual.

ALERT: When servicing accessory solenoid valves that

control safety critical accessories (i.e., fi fth wheel lock,
king pin release, etc.), ensure that all components of the
redundant / backup system (i.e., two-step release system)
are functioning as intended by the original equipment
manufacturer.

When the in-cab switches are pressed to activate or
deactivate an accessory, the solenoids will promptly
exhaust (NO), apply (NC), or pulse (latching) air pressure to
an auxiliary device. Continuous exhausting of air pressure
should not occur.

2