SHROUD AS 3453462 - Caterpillar

Personal injury or death can result from escaping fluid under pressure.Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
Relieve pressure from the pump and the supply lines before servicing or repairing pump.
Cleaning Procedure for the Vent Valve
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(1) Cylinder (2) Needle (3) Packing gland (4) Valve seat (5) Valve bodyThis procedure should be performed if any of the following conditions are occurring:
The pump is running excessively.
The pump is not developing the proper pressure.
The system pressure is not venting or relieving.Cleaning Instructions
Turn off and disconnect the air supply to the pump assembly.
Remove the delivery hose, vent hose, air supply hose and all the mounting hardware. Remove the vent valve assembly from the pump.
Hold valve body (5) in a bench vise by the flats that are machined on the base of the valve body.
Remove cylinder (1) .
Remove packing gland (3) .
Inspect needle (2) and valve seat (4). Check for any foreign matter that may be in this area. The foreign matter may be keeping the needle from seating properly. Clean the area thoroughly with a solvent. If the needle or the valve seat appear to be damaged by nicks, grooves or scoring, then the entire vent valve should be replaced.
Reassemble the vent valve assembly by reversing the above procedure. The needle and the inside diameter of the cylinder should be coated with grease in order to assist in assembling.
Tighten the valve seat to the valve body to 35 N m (26 lb ft). Tighten the cylinder to the valve body to 135 N m (100 lb ft).Moisture in the Air System
Moisture in the air supply can cause the muffler on the air pump to freeze up. This condition will block the air flow of the pump. The blockage may cause the following problems:
The pump runs very slowly.
The pump does not run at all.The air tank should be drained on a regular schedule. Also, the desiccant in the air dryer should be checked on a regular schedule. The following two sections explain the procedures for draining the air tank and checking the desiccant in the air dryer.Draining the Air Tank
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The air tank is located on the right side of the cab platform.Push down on the drain valve in order to drain the moisture and the sediment from the air tank.Replacing the Desiccant in the Air Dryer
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The air dryer is located under the cab platform on the right side of the machine.When the desiccant cartridge in the air dryer fails to absorb water, the desiccant cartridge must be rebuilt or the desiccant cartridge must be replaced.Check for moisture in the air reservoirs.If there is moisture in the air reservoirs, replace the desiccant cartridge or rebuild the desiccant cartridge. Consult your Caterpillar dealer for information about