Owner manual

2
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
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.
FIGURE 2 - TYPICAL SYSTEM CONFIGURATION
INTERAXLE
LOCK SWITCH
DIFFERENTIAL
LOCK SWITCH
PTO SWITCH
SUPPLY
RESERVOIR
BENDIX
®
SMS-9700
™
ACCESSORY
SOLENOID MANIFOLD
SUSPENSION DUMP SWITCH
PRESSURE
PROTECTION
VALVE
TYPICAL
IN-CAB SWITCHES
Sample identifi cation label located on the back of the
solenoid mounting bracket. Each OE manufacturer will
have different labeling requirements.