FITTING AS-AIR CONDITIONER 1878661 - Caterpillar

When replacement parts are required for this product Caterpillar recommends using Caterpillar replacement parts or parts with equivalent specifications including, but not limited to, physical dimensions, type, strength and material.Failure to heed this warning can lead to premature failures, product damage, personal injury or death.
Quality Caterpillar replacement parts are available from Caterpillar dealers throughout the world. Caterpillar dealers' parts inventories are up-to-date. The parts stocks include all of the parts that are normally needed to protect your Caterpillar engine investment.When you order parts, please specify the following information:
Part number
Part name
QuantityIf there is a question concerning the part number, please provide your dealer with a complete description of the needed item.If you have a problem with operation, discuss the problem with the dealer. Inform the dealer about the conditions of the problem and the nature of the problem. Inform the dealer about when the problem occurs. This will help the dealer in troubleshooting the problem and solving the problem faster.Table 1 is a list of serviceable parts for the oil mist detectors. The parts are in the 190-3922 Service Kit.
Table 1
190-3922 Service Kit    
Pt. No.     Description     Qty     Function    
190-3908     Heater As     1     The heater warms the atmosphere in the measuring head in order to help prevent condensation.    
190-3909     Connector     1     The connector is for the main power supply.    
190-3911     Seal     1     The seal is for the exhaust air and oil ( 149-5143 Oil Mist Detector ).    
190-3914     Mount     2     The lower mount for the detector helps to reduce the effects of vibration.    
190-3915     Sensor As     1     The assembly is the measuring head for the 149-5143 Oil Mist Detector.    
190-3916     Mount     2     The upper mount for the detector helps to reduce the effects of vibration.    
190-3917     Seal     1     The seal is for the rear of the measuring head.    
190-3918     Sleeve     2     The sleeve acts as a gasket for the connections of the suction pipes in the connection blocks ( 149-5143 Oil Mist Detector ).    
190-3920     Fuse     1     The 2 amp fuse is used in the measuring head.    
190-3921
Service Kit
(Pressure Regulator)     1     197-5465 Filter for the air pressure regulator    
1 O-ring for the filter    
1 O-ring for the valve    
1 Diaphragm    
1 Valve needle    
1 Large spring    
1 Small spring    
197-5464     Filter     2     This sintered bronze filter is for filtering the air before the glass of the infrared filter in the measuring head.    
197-5465     Filter     1     This sintered bronze filter is for filtering the fresh air before the air pressure regulator.