Bendix Commercial Vehicle Systems FCS-9700 User Manual

Bendix® FCS-9700™ Fan Clutch Solenoid

SD-03-10433

SUPPLY PORT

MOUNTING

BRACKET

(LEFT HAND)

NORMALLY OPEN (NO)

SOLENOID

EXHAUST

PORT

FIGURE 1 - BENDIX® FCS-9700™ FAN CLUTCH SOLENOID VALVES

DELIVERY

ELECTRICAL

CONNECTOR

PORT

DESCRIPTION

The Bendix® FCS-9700™ fan clutch solenoid, shown in Figure 1, is a low air ﬂ ow solenoid used to control the fan clutch. A thermostat controls the solenoid operation.

The fan clutch solenoid is always mounted as a stand alone solenoid. Depending on the application, it can be a normally closed (NC) or normally open solenoid (NO). The integral mounting bracket comes in a right or left position and is not removable.

OPERATION

Because this solenoid valve is used for an auxiliary air function, a pressure protection valve, such as a Bendix® PR-3™ valve, must be installed to protect the air brake system. Based on the application, the solenoid will deliver or exhaust air. See Figure 2 for a typical system

conﬁ guration.

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 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

When the in-cab switch is pressed to activate or deactivate the fan clutch, the Bendix FCS-9700 exhaust (NO) or apply (NC). Note that the solenoid part number label is marked with an NO or NC for identiﬁ cation. Continuous exhausting of air pressure should not occur.

LEAKAGE CHECKS

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.

With the air system fully charged, coat the exhaust ports of the solenoid with a soap solution. A 1-inch bubble in three (3) seconds is permitted (175 SCCM).

MOUNTING

BRACKET

(LEFT HAND)

NORMALLY CLOSED

(NC) SOLENOID

SUPPLY PORT

EXHAUST

PORT

DELIVERY

PORT

ELECTRICAL

CONNECTOR

solenoid will promptly

FAN CLUTCH

THERMOSTAT

CONTROL SWITCH

FIGURE 2 - TYPICAL SYSTEM CONFIGURATION

BENDIX

FCS-9700™ FAN

CLUTCH SOLENOID

PRESSURE

PROTECTION

VALV E

SUPPLY

RESERVOIR

If the solenoid does not function as described above, or if leakage is excessive, it is recommended that it be replaced

with a genuine Bendix

service replacement.

REMOVAL

1. Prior to removing the solenoid, apply the parking brakes and drain all the vehicle reservoirs. Refer to the General Safety Guidelines in this manual before performing any service.

2. Identify, and mark, and disconnect the air lines to the solenoid. Push-to-connect ﬁ ttings require the collar to be pressed toward the valve body before the nylon line can be pulled.

3. Identify, mark, and disconnect the electrical connector from the solenoid.

4. Remove the mounting bolt and remove the solenoid from the vehicle.

DISASSEMBLY

The Bendix® FCS-9700™ solenoid can not be serviced or repaired, it can only be replaced with service replacement solenoids.

INSTALLATION

1. Install the valve on the vehicle by tightening the mounting bolt to 150-200 inch pounds.

2. Reconnect the air lines and electrical connectors.

3. Charge the reservoirs, then check for operation and leakage.