MUFFLER & CONVERTER AS 2144855 - Caterpillar

1. Group Classification
This manual is organized into several groups classified according to the engine basic elements. 2. Terms And Units
The following terms and units are used throughout the entire texts of this manual.(1) Front and rear The terms "front" is the fan side and "rear" the flywheel side of the engine.(2) Right and left The terms "right" and "left" shall be used to indicate the side as viewed from the flywheel side of the engine.(3) Service standard terms * Nominal value Shows the nominal dimensions, dimension of an individual part, standard clearance between parts in an assembly, or the standard performance of an assembly.* Limit Shows the value of a part at which the part is no longer serviceable from the performance as well as strength viewpoints, requiring replacement or repair.(4) Tightening torque Over- or undertightening of bolts and nuts has critical effects on performance and functions. Tightening torque is therefore specified for some tightening points.All tightening torque specifications may be considered as "dry" unless "wet" is specified. Where no tightening torque is specified, use a torque value specified in the General Bolts and Nuts Tightening Torque Table.(5) Units For length, weight, area, and volume, the SI unit (International System of Units) is used with the metric notation jointly shown in parentheses. Temperature is shown in centigrade (°C).3. Table Of Conversion Rate For Foot-Pound Units Into SI Units
4. Reading The Illustration
(Ex. 1: Disassembly and Inspection) (Ex. 2: Reassembly) Illustrations (exploded views and assembly drawings) show a typical service procedures if it is identical among various types of available systems and units.1. External View
2. Major Specifications
2.1 Major Specifications
2.2 Engine Outputs Classified By Application
1. The output (SAE, gross) is corrected to standard ambient conditions based on SAE J1349.2. The continuous rated output allows 10% (one hour) overload operation.3. Engine Number, Name Plate And Caution Plate
(1) Engine number The engine number is stamped on the rear left of the crankcase as illustrated. The engine number is important in knowing the history of the engine.(2) Name plate, caution plate The name plate and caution plate are attached to the portion shown in the illustration, and indicate the following items.(a) Name plate 1. Engine model2. Total displacement3. Maximum output4. Valve clearance5. Firing order6. Fuel injection timing(b) Caution plate 1. Valve clearance2. Firing order3. Fuel injection timing4. General Precautions For Servicing
Before starting the service procedures, check for total operating hours and use conditions of the machine as well as user's complaints and requests to know exactly the engine conditions. Record information where necessary.To ensure you are doing correct and efficient service jobs, observe the following precautions: 1) Before performing the service procedures given in this manual, know the trouble spots and isolate the possible cause to determine whether the removal or disassembly procedure is required.2) Select a flat surface for the service job.3) When servicing the electrical system, be sure to disconnect the (negative) cable from the battery.4) Carefully check parts for oil leaks before cleaning. After cleaning, it may become difficult to spot