TM 10-3930-675-20-20164 00-2RELIEVING HYDRAULIC SYSTEM PRESSURE - CONTINUED0164 00RELIEVING HYDRAULIC SYSTEM PRESSURE - CONTINUEDNOTEWhen performing steering or brake hydraulic system maintenance, leave evacuation valves open until main-tenance action is completed. Then close valves before starting engine to pressurize system.2.To further release pressure in steering hydraulic system, open steering accumulator evacuation valve (1) behind cab.Allow pressure to release, approximately 15 seconds. It is now safe to perform maintenance on steering system.3.To further release pressure in brake hydraulic system, open two brake accumulator evacuation valves (2) behind cab.Allow pressure to release, approximately 15 seconds. It is now safe to perform maintenance on brake system.12
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