User manual BENDIX TU-FLO 501 AIR COMPRESSOR

[. . . ] ® Bendix® TU-FLO® 501 Air Compressor DESCRIPTION AND OPERATION General The function of the air compressor is to provide and maintain air under pressure to operate devices in the air brake and/ or auxiliary air systems. Description The Tu-Flo® 501 compressor is a two cylinder, single stage, reciprocating compressor with a rated displacement of 12 cubic feet of air per minute at 1250 R. P. M. The Tu-Flo® 501 compressor is constructed from two major assemblies, the head and the crankcase. The head houses the discharge valving and is installed on the upper portion of the crankcase. [. . . ] For more information on how to help prevent discharge line freeze-ups, see Bendix Bulletins TCH-08-21 and TCH-08-22 (see pages 32-34). Shorter discharge line lengths or insulation may be required in cold climates. The air dryer contains a filter that collects oil droplets, and a desiccant bed that removes almost all of the remaining water vapor. The compressed air is then passed to the air brake service (supply) reservoir. The oil droplets and the water collected are automatically purged when the governor reaches its "cut-out" setting. For vehicles with accessories that are sensitive to small amounts of oil, we recommended installation of a Bendix® PuraGuard® system filter, designed to minimize the amount of oil present. The Air Brake Charging System supplies the Discharge Line Optional "Ping" Tank Air Dryer compressed air for the braking system as well as other air accessories for the vehicle. The system usually consists of an air compressor, governor, discharge line, air dryer, and service reservoir. Optional Bendix® PuraGuard® System Filter or PuraGuard® QCTM Oil Coalescing Filter Compressor Governor (Governor plus Synchro valve for the Bendix® DuraFloTM 596TM Compressor) Service Reservoir (Supply Reservoir) Reservoir Drain 14 Table A: Maintenance Schedule and Usage Guidelines Regularly scheduled maintenance is the single most important factor in maintaining the air brake charging system. Column 1 Typical Compressors Spec'd Column 2 Discharge Line I. D. Length Column 3 Recommended Air Dryer Cartridge Replacement1 Column 4 Recommended Reservoir Drain Schedule2 Column 5 Acceptable Reservoir Oil Contents3 at Regular Drain Interval Vehicle Used for: Low Air Use Compressor with less than 15% duty cycle No. of Axles 1/2 in. Bendix® Tu-Flo® 550 air compressor 6 ft. Recommended Every Month Max of every 90 days e. g. Line haul single trailer w/o air suspension, air over hydraulic brakes. Compressor with up to 25% duty cycle 5 or less For oil carry-over control4 suggested upgrades: 5/8 in. Line haul single trailer with air suspension, school bus. 5 or less Bendix® BA-921TM air compressor BASIC test acceptable range: 3 oil units per month. See appendix A. For oil carry-over control4 suggested upgrades: 5/8 in. 12 ft. High Air Use Compressor with up to 25% duty cycle Bendix® Tu-Flo® 750 air compressor e. g. Double/triple trailer, open highway coach/RV, (most) pick-up & delivery, yard or terminal jockey, off-highway, construction, loggers, concrete mixer, dump truck, fire truck. For the BASIC Test Kit: Order Bendix P/N 5013711 1/2 in. 12 ft. Every 2 Years BASIC test acceptable range: 5 oil units per month. See appendix A. 8 or less For oil carry-over control4 suggested upgrades: Bendix® BA-922TM, or DuraFloTM 596 air compressor 5/8 in. 15 ft. Compressor with up to 25% duty cycle Every Month 5/8 in. City transit bus, refuse, bulk unloaders, low boys, urban region coach, central tire inflation. 12 or less For oil carry-over control4 suggested upgrades: 3/4 in. 15 ft. Footnotes: 1 With increased air demand the air dryer cartridge needs to be replaced more often. 2 Use the drain valves to slowly drain all reservoirs to zero psi. 3 Allow the oil/water mixture to fully settle before measuring oil quantity. 4 To counter above normal temperatures at the air dryer inlet, (and resultant oil-vapor passing upstream in the air system) replace the discharge line with one of a larger diameter and/ or longer length. This helps reduce the air's temperature. [. . . ] Here are some Do's and Don'ts for prevention and thawing. Do maintain freeze prevention devices to prevent road calls. Don't let evaporators or injectors run out of methanol alcohol or protection will be degraded. Check the air dryer for proper operation and change the desiccant when needed. [. . . ]