TM 9-2330-390-14&P4-170 4-72.FRONT DOLLY AIRLINES REPLACEMENT (Con't).NOTELeft side and right side hose assemblies are replaced the same way. Right sidehose assembly is illustrated.1.Disconnect hose assembly (21) from airbrakechamber (20).2.Remove spring (23) from eyebolt (24).NOTEHose assembly to other airbrakechamber is removed at same time.3.Remove nut (25) from eyebolt (24) and sepa-rate hose clamp (26). Release hose assembly(21).4.Disconnect hose assembly (21) from relayemergency valve (22). Remove hose assem-bly.5.Connect hose assembly (21) to relay emer-gency valve (22).6.Connect hose assembly (21) to airbrake cham-ber (20).NOTEHose assembly to other airbrake chamber is installed at same time.7.Install hose assembly (21) in hose clamp (26) and secure with eyebolt (24) and nut (25).8.Install spring (23) on eyebolt (24).1.Disconnect tube assembly (27) from elbow (29) at relay emergency valve (22).2.Disconnect tube assembly (27) from elbow (28) at pressure protection valve (30). Remove tube assembly.3.Connect tube assembly (27) to elbow (28).4.Connect tube assembly (27) to elbow (29).b.RELAY EMERGENCY VALVE-TO-AIRBRAKE CHAMBER HOSE ASSEMBLY REPLACEMENTc.PRESSURE PROTECTION VALVE-TO-RELAY EMERGENCYVALVE TUBE ASSEMBLY REPLACEMENT
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