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| Illustration 1 | g01129459 |
(1) Serial Number Plate | |
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| Illustration 2 | g01129463 |
(2) Information Plate | |
Caterpillar engines are identified by serial numbers and by arrangement numbers. These numbers are shown on the engine serial number plate and on the engine information plate. Caterpillar dealers need these numbers in order to determine the components that were included with the engine. This permits accurate identification of replacement part numbers.
Serial Number Plate (1)
The engine serial number plate is located on the upper right side of the engine block.
Engine serial number ____________________
Engine model ____________________
Arrangement number ____________________
Information Plate (2)
The engine information plate is located on the valve cover base near the front of the left side of the engine.
Engine Serial Number ____________________
Engine Arrangement Number ____________________
Engine Modification Number ____________________
The engine identification plate also contains other important information about the engine.
Transmission Serial Number
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| Illustration 3 | g01677299 |
Serial Numbers are used to identify the transmissions.
For quick reference, record the identification numbers in the spaces that are provided below the illustrations.
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| Illustration 4 | g01460662 |
TH31 Transmission | |
The TH31 nomenclature covers a broad range of transmissions with the same size of clutches. It is important for the owners, users, and service personnel to use the correct TH31 arrangement numbers. All TH31 transmissions have the same serial number prefix PFW but there are a variety of options within the serial number. Options include the following: PTO systems, pump displacement control, rear PTO, 2 wheel drive and dropbox, 4 wheel drive and dropbox, retarder, oil level sensor, yokes, flex plates and accessories. The Caterpillar Dealer will need the prefix and all of the serial number to properly identify a particular transmission.