PIN 2273149 - Caterpillar

Illustration 1 g00740157
(1) combustion feedback cable assembly, (2) O-ring seal and (3) connector assemblyThe O-ring seals are designed to work with a specific combustion feedback cable assembly and connector assembly. Refer to the following table for serviceability of the O-ring.
Table 1
Connector Assembly     Combustion Feedback Cable Serviceable O-ring Seal    
133-3576     176-9933    
188-4926     189-3769    Note: The O-ring seal between the combustion feedback cable assembly and the connector assembly should be inspected at the 5000 hour maintenance interval. Replace the O-ring if the O-ring appears to have taken a set.Tightening Guidelines
Note: Do not overtighten the combustion feedback cable nut to the connector assembly. The joint does not have a specific torque value. In order to avoid damage, careful assembly of the joint is required.The combination of the 134-8346 Wire (Combustion Feedback Cable Assembly), the 133-3576 Connector (Assembly), and the 176-9933 Connector Seal (O-ring seal) requires you to use the following guideline:
The combustion feedback cable nut should be tightened one-half turn after the O-ring seal has made contact with the connector assembly.The combination of the 188-4927 Wire (Combustion Feedback Cable Assembly), the 188-4926 Connector (Assembly), and the 189-3769 O-Ring Seal requires you to use the following guideline:
Tighten the combustion feedback cable nut to the connector assembly until a solid connection is made. Once a solid connection is made, the O-ring will have the proper compression.