BENDIX TU-FLO 400-500-1000 AIR COMPRESSOR DRY Element Pleated Paper AIR Strainer FIG, Removing

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FIGURE 14 - POLYURETHANE SPONGE STRAINER

FIGURE 15 - DRY ELEMENT- PLEATED PAPER AIR STRAINER

DRY ELEMENT - PLEATED PAPER AIR STRAINER (FIG. 15)

Remove the spring clips from either side of mounting baffle and remove the cover. Replace the pleated paper filter and remount the cleaned cover making sure the filter is in position. Be sure to replace the air strainer gasket if the entire air strainer is removed from the compressor intake. (NOTE: Some compressors are fitted with compressor intake adapters (Fig. 16) which allow the compressor intake to be connected to the engine air cleaner.) In this case, the compressor receives a supply of clean air from the engine air cleaner. When the engine air filter is changed, the compressor intake adapter should be checked. If it is loose, remove the intake adapter, clean the strainer plate, if applicable, and replace the intake adapter gasket, and reinstall the adapter securely. Check line connections both at the compressor intake adapter and at the engine air cleaner. Inspect the connecting line for ruptures and replace it if necessary.

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FIGURE 16 - COMPRESSOR INTAKE ADAPTER

AIR LEAKAGE TESTS

Leakage past the discharge valves can be detected by removing the discharge line, applying shop air back through the discharge port and listening for escaping air. Also the discharge valves and the unloader pistons can be checked for leakage by building up the air system until the governor cuts out, then stopping the engine. With the engine stopped, carefully listen for escaping air at the intake. To pinpoint leakage if noted, squirt oil around the unloader pistons. If there is no noticeable leakage at the unloader pistons, the discharge valves may be leaking.

If the compressor does not function as described above, or leakage is excessive, it is recommended that it be returned to the nearest Bendix authorized distributor for a factory rebuilt compressor under the repair exchange plan. If this is not possible, the compressor can be repaired with genuine Bendix parts, in which case the following information should prove helpful.

REMOVING AND INSTALLING

REMOVING

These instructions are general and in some cases additional precautions must be taken.

Drain air brake system.

If water-cooled type compressor, drain engine cooling system, compressor cylinder head and block. Disconnect all air lines, water and oil lines to and from compressor.

Remove compressor mounting bolts and compressor from engine.

Use a gear-puller to remove the gear or pulley from compressor crankshaft.

INSTALLATION

ENGINE-LUBRICATED TYPES

Clean oil supply line. Before connecting this line to the compressor, run the engine briefly to be sure oil is flowing freely through the supply line.

Clean the oil return line or return passages through the brackets; these passages must be unrestricted so oil can return to the engine.

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Contents SD-01-326 General DescriptionOperation Intake and Compression LoadedCompressor & the AIR Brake System Preventive Maintenance CoolingPolyurethane Sponge Strainer Fig DRY Element Pleated Paper AIR Strainer FIG Removing and InstallingInstallation ENGINE-LUBRICATED Types AIR Leakage TestsConnecting ROD Assemblies DisassemblyRemoving and Disassembly Crankcase Base Plate or AdapterCrankcase Fig TU-FLO400 AIR Compressor Vertical Mount Engine LubricatedCleaning Inspection of PartsCylinder Bores Crankcase and END CoversInlet Valves and Seats PistonsRepairs Installing Crankshaft AssemblyInstalling Cylinder Block Pistons and Connecting RodsBaseplate Page Installation Scheduled MaintenanceTabulated Data Test Procedures Maintenance & Usage GuidelinesSymptom Number Introduction to the Air Brake Charging System Low Air Use High Air UseSymptom What it may indicate What you should do Discontinue using this testOil Test Card Not a valid test Results Oil on the Outside of the Compressor Oil at air dryer purge/exhaust or surrounding areaOil in Supply or Service Reservoir air dryer installed MaintenanceOil in Supply Insufficient coolant flowOil in Supply or Service Reservoir Charge aftercooler Air brake Oil in ping tankOr compressor dis Charging systemAir brake charging system seems slow to build pressure Releases air Compressor builds too much air Air dryer Safety valve releases air TimeLeaks coolant Coolant line fittings NoisyTest 2 Air Brake System and Accessory Leakage Test 1 Excessive Oil Leakage at Head GasketAction Test 4 Governor Malfunction Test 5 Governor Control LineTest 6 Compressor Unloader Leakage Page Bendix Air System Inspection Cup Basic Test Information Appendix a Information about the Basic Test Kit Bendix P/NStep a Select one Checklist for TechnicianStep B Measure the Charging System Contents Is foundStep D Air Brake System Leakage Test Technical Bulletin Typical P&D, School Bus and Line HaulSystem Leakage Thawing Frozen Air Lines Page