631E Series II, 633E Series II and 637E Series II Wheel Tractor-Scrapers Air System and Brakes Caterpillar


Check Valve (Air Tank)

Usage:

631E 1AB



Illustration 1g00650744

(1) Check valve (two) on tractor air reservoir




Illustration 2g00300703

(2) Check valve on scraper air reservoir




Illustration 3g00301199

Components of the check valve

(3) Seat

(4) Valve

(5) Spring

(6) Inlet

(7) Outlet

The check valves are used to allow air to flow in one direction only. Air that is entering the check valve through inlet (6) will force spring (5) in compression and valve (4) will open. Air under pressure is now free to flow through the check valve.

Air that is entering the check valve through outlet (7) will push valve (4) against seat (3). The flow of air is stopped.

Caterpillar Information System:

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