VALVE GP-AIR CONTROL 2462901 - Caterpillar

Engine Coolant
Checking Water Temperature
The water temperature gauge should normally register in the NORMAL range when operating. However, with some systems, as long as the coolant does not boil the cooling system is functioning properly. 1. Check the water temperature gauge reading frequently during operation. Note any deviation from the usual reading. Have repairs made as needed.2. If the water temperature gauge continually registers near - or in the "HOT" range - without boiling, have the gauge checked to determine if the cooling system is functioning properly. Have repairs made as needed.Checking Coolant Level
With the engine stopped:1. Slowly turn the filler cap to the first stop and release pressure.
Be careful. If the engine is warm - steam may spray outward under high pressure.
2. Push the cap down; turn until the cap is released.3. Maintain coolant level to the base of the fill pipe. 4. Make-up coolant should be one of the following, in the order of preference: a. Permanent antifreeze and fresh water solution.b. Drinkable water and rust inhibitor solution.c. Drinkable water.d. Any available fresh water.(a) Must be used if engine is to be shut down in below freezing weather without draining the coolant. (b) Can only be used when the coolant temperature is above freezing, or if the coolant will be immediately drained after shut down during below freezing temperatures.(c) or (d) Should only be used as a "temporary fix". As soon as possible, return the system to either (a) or (b).Draining Radiator
If a permanent antifreeze solution is used in