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English 
Racor's Sentinel all mechanical engine protection system is designed to protect from high water temperature, loss of oil, coolant, and tail pump pressure, and even theft. Under normal operating conditions, oil pressure from the engine will keep the fuel valve of the master control in the raised position allowing the fuel to flow through to the engine. Loss of oil pressure will automatically cause the fuel valve to drop, shutting off the fuel flow. When the engine coolant temperatures exceed the setting of the Heat Valve, the ball seal will open and dump oil pressure from under the Master Control piston. This in turn, will cause the fuel valve to fall and block fuel flow to the engine. Coolant flow pressure from the water pump keeps the coolant pressure valve in the closed position. Loss of coolant flow pressure will cause the seal to open and dump oil pressure from under the Master Control piston, thus cutting the fuel flow to the engine.
The Sentinel is all engine protection system which can provide your engine and pump from:
• High Water Temperature
• Low Oil Pressure
• Loss of Coolant Pressure
• Loss of Tail Pump Pressure
• Theft Protection
While protecting your engine, Sentinel provides you with:
• An All Mechanical System
• A Trouble Free System
• A Non-Electric System
• An Increased Shut-Down Point
• Minimum Maintenance
• A Repairable System
