Introduction of Air suspension System:Air suspension system as secondary suspension incoaching stock is far superior to conventional secondarysuspension & provides Better riding comfort

Main equipments of Air suspension system:1. Air spring - 04 Nos /Coach2. Levelling valve - 04 Nos /Coach3. Duplex check valve - 02 Nos /Coach Better riding comfort

Improved reliability and reduced maintenance Capacity to sustain super dense crush load

Working principle:In air suspension system, properties of air are used for

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4. 40 ltrs auxiliary reservoir - 04 Nos /Coach5. Bogie suspension isolating cock - 02 Nos /Coach6. Non return valve - 01 No /Coach 7. 150 ltrs MR reservoir - 01 No /Coach8. Coach suspension isolating cock - 01 No /Coach

cushioning effect. Enclosed pressurized air in a rubberbellow is called Air spring. These are height-controlledload leveling suspension devices for changing loads.

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Inspection and Maintenance Schedule:For inspection and maintenance of airsuspension system following checks should bedone at maintenance depots:-

Visually check the condition of air spring rubberbellows for any external damages, air leakageand infringement of any fittings .

Drain the 150 litre air reservoir of air suspensionsystem and check its safety straps for tightness.Check the air leakage from adjoining pipe line.

Drain the 40 litre air reservoirs of air suspensionsystem and check their safety straps fortightness. Check the air leakage from adjoiningpipe line.p p

Check the position of coach and bogie isolatingcocks, these should be in open position andbracket for handle should be intact .

Check the installationlever, tightening ofinstallation lever nutsand protection screennuts.

Operating Instructions:1. Train driver should maintain 7 Kg/cm2

pressure from the compressor.2. In case of heavy leakage of air from any bogie or GOVERNMENT OF INDIA GOVERNMENT OF INDIA y g y g

coach, following action should be taken by driverand guard of the train.

Visually check the leaky / failed spring bythe position of horizontal lever.

Visually check the leakage area of the airi d t k ti f ll

MINISTRY OF RAILWAYS MINISTRY OF RAILWAYS (For Official Use(For Official Use))

AIR SUSPENSION SYSTEM AIR SUSPENSION SYSTEM FITTED ON FITTED ON

HYBRID COACHESHYBRID COACHESsuspension and take action as follows:- If leakage is between coachsuspension isolating cock andbogie suspension isolating cockthen close the coach suspensionisolating cock.

HYBRID COACHES HYBRID COACHES

If leakage is found between bogiesuspension isolating cock and airspring then close the bogiesuspension isolating cock.

After isolating the coach/ bogie airsprings, limit the train speed to 60

CAMTECH/M/2010-11/Air Sus/1.0May 2010

The information given in this pamphlet does not supersede any existing provisionslaid down in RDSO and Rly. Boards instructions. This document is not statutoryand instructions given in it are for the purpose of guidance only. If at any pointcontradiction is observed, Rly. Board/RDSOs guidelines or Zonal Rly.sinstructions may be followed.

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ContactAddress:IndianRailways

CentreforAdvancedMaintenanceTechnologyMaharajpur,Gwalior 474005Email:edcamtech@gmail.com