TM 5-3805-258-24-1A I R S Y S T E M A N D B R A K E S3. Push and hold either brake pedal in a downposition.4. Put soapy water on all connections and valves inthe air circuit. Check for leakage.NOTE: If air pressure in the reservior gets belowcutin pressure (see chart), start and run the engineuntil the air pressure goes up to the cutout pressure.5.6.7.8.Release the brake pedal.Put soapy water on the exhaust diaphragm ofeach brake control valve. Check for leakage.Correct any leakage that is found.Remove the gauge.NOTE: During the time the valve are checked forleakage, check the exhaust passages for restriction,like mud or dirt. A restriction in an exhaust passagewill prevent or slow the release of pressure airduring normal operation.AIR COMPRESSOR GOVERNORT o o l s N e e d e d : 0 t o 1 3 8 0 k P a ( 0 t o 2 0 0 p s i ) G a u g e .WARNINGMake reference to WARNING on first page ofAIR SYSTEM AND BRAKES TESTING AND AD-3.4.5.6.7.8.JUSTING section.9.1.2.L O C A T I O N T O I N S T A L L G A U GE1. Drain valve of the air reservoir.Install a 0 to 1380 kPa (0 to 200 psi) gauge ondrain valve (1) of the air reservoir.Start the engine and let the pressure go up to thecutout pressure.T E S T I N G A N D A D J U S T I NGA I R C O M P R E S S O R G O V E R N OR1. Adjustment screw. 2. Locknut.Read the cutout pressure on the gauge.Push one of the brake pedals rapidly severaltimes, until air compressor cuts-in (starts).Read the cut-in pressure on the gauge.See chart for correct governor pressures. If thepressures are not correct, adjust the governor.Use this procedure to adjust the governor:a. Loosen locknut (2) adjustment screw (1).b. Turn the adjustment screw counterclockwiseto make the cutout pressure lower (clockwiseto raise). One turn of the screw changes thepressure 140 kPa (20 psi). The cut-in pressurewill change the same amount.If the adjustment screw does not change thecutout cutout pressure, the unloading valves inthe air compressor are not working correctly.If the cut-in to cutout pressure difference is notcorrect, the governor is not working correctly.10. Remove the gauge.[GOVERNOR AIR PRESSURESI950BNS 8nd 950BsCut-h Pressure655 ~ 14 kPa(95 * 2 psi)Cutout Pressure758k 14 kPa(110 * 2 psi)950BNSCE -d 950BsmCut-In Pressure700+0-35kPa(loo+ o-5pei)Cutout Pressure825 &35kPa(120 *5Deii4-60
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