User manual BENDIX FD-L FAN CLUTCH

[. . . ] ® Bendix® FD-LTM Fan Clutch FAN HUB BRACKET DUST CAP ISOLATOR PRESSURE PLATE PULLEY PISTON COMPLETE SPRING HEX NUT BEARINGS LOCKWASHER BEARINGS WASHER SPACER PISTON HOUSING HEX NUT COTTER PIN CAP SPACER O-RING O-RING O-RING FIGURE 1 1 SD-09-8505 The FD-LTM fan clutch is designed for mid-range diesel engine applications and can withstand maximum fan torque of 750 inch pounds and a fan weight not to exceed 15 pounds. It cannot be used to replace heavy duty clutches or hubs that do not meet the above stated specifications. FAN ENGAGED DESCRIPTION The Bendix ® FD-L TM fan clutch is an air operated thermostatically controlled clutch for the engine cooling fan. Its purpose is to maintain engine temperature by engaging or disengaging the cooling fan, thereby, providing better fuel economy, greater engine efficiency, faster warm-ups and a quieter vehicle. The FD-LTM fan clutch is produced in several different models to accommodate the variety of installation requirements resulting from the many engine, vehicle and accessory combinations. [. . . ] The fan clutch control should always be 10°F higher than the highest setting. If the fan clutch installation has successfully passed this test before, but does not do so now, the thermostatic control valve or thermostat are defective and should be replaced. 3. 4. 5. 6. 7. 8. LEAKAGE CHECKS In order to check for air leakage past the only two sliding o-rings in the FD-LTM fan clutch, it is necessary to disconnect the single air control line. reservoir (Bendix part number 225000) with a gauge installed to the control port of the fan clutch. reservoir with 100 psi, allow the pressure to stabilized and observe the time required for the reservoir pressure to drop to 90 psi. If the time required is less than 1 minute, leakage is excessive and repair or replacement is necessary. 9. 10. contact with moving, rotating, leaking, heated or electrically charged components. Do not attempt to install, remove, disassemble or assemble a component until you have read and thoroughly understand the recommended procedures. Use only the proper tools and observe all precautions pertaining to use of those tools. If the work is being performed on the vehicle's air brake system, or any auxiliary pressurized air systems, make certain to drain the air pressure from all reservoirs before beginning ANY work on the vehicle. If the vehicle is equipped with an AD-ISTM air dryer system or a dryer reservoir module, be sure to drain the purge reservoir. Following the vehicle manufacturer's recommended procedures, deactivate the electrical system in a manner that safely removes all electrical power from the vehicle. Never connect or disconnect a hose or line containing pressure; it may whip. Never remove a component or plug unless you are certain all system pressure has been depleted. must be of equivalent size, type and strength as original equipment and be designed specifically for such applications and systems. Components with stripped threads or damaged parts should be replaced rather than repaired. Do not attempt repairs requiring machining or welding unless specifically stated and approved by the vehicle and component manufacturer. NOTE: To fabricate a tool to remove the 1-9/16" hex nut, take two deep sockets and cut the end out of one and weld the remaining length onto the bottom of the other socket to make it approximately double the original length. DISASSEMBLY (REFER TO FIGURE 9) 1. Separate the piston (14) from the piston housing (13) and remove the o-ring (3). Remove the pressure plate (6) and the six springs (7). 6 PULLEY DISASSEMBLY 1. Support the backside of the pulley so that the shaft bracket assembly can be pressed down far enough to remove the pulley assembly. Since the bearings are originally installed with Loctite between the shaft and bearings, a force as high as 5000 lbs. [. . . ] Apply one band of Loctite RC609 around the shaft at the location of inner races of the bearings (15) in the pulley. Also put a band of the Loctite on the inner races of the bearings (15). NOTE: Parts MUST BE free of oil and grease for Loctite to properly bond. FINAL ASSEMBLY 1. Support the bracket, shaft and pulley assembly with the shaft pointing up. [. . . ]