WASHER 6J5737 - Caterpillar

Petroleum Transmission: TH31-E61 (S/N: LWC1-UP; LAD1-UP; SKY1-UP) TH35-E81 (S/N: MSB1-UP; TZM1-UP; SMS1-UP; PZT1-UP)Petroleum Power Train Package: TH31-C9I (S/N: PAZ1-UP) TH31-C9T (S/N: PAY1-UP) TH35-C11I (S/N: PBZ1-UP) TH35-C13I (S/N: PBY1-UP) TH35-C13T (S/N: PBW1-UP) TH35-C15I (S/N: PBN1-UP) TH35-C15T (S/N: PBL1-UP) TH31-C9P (S/N: PFZ1-UP)Introduction
(PT) Power Train (Transmission)
TH31-E61 LAD1-UP
TH31-E61 (S/N: LWC1-UP)
TH35-E81 PZT1-UP ; MSB1-UP
TH35-E81 SMS1-UP(PS) Power Systems (Transmission and Engine)
TH31-E61 SKY1-UP
TH35-E81 TZM1-UPThis document is a reference and guide for the application and installation (A and I) of Caterpillar transmissions used in the petroleum industry. The two transmission models that are listed above are frequently used in oil field service applications. Applications include work over rigs pumping units and other oil service power train requirements.The transmission models that are described in this guide are used with diesel engines that range from 300 hp to 550 hp. The Caterpillar engines that are used for illustration purposes in this guide will be the C9 with the TH31-61 transmission and the C11, C13, and C15 with the TH35-E81 transmission. Both transmission models mount to engines with SAE 1 dry flywheel housings.Notice
The mechanical and electrical Application and Installation Guides are stored and printed from an electronic file. These files may be revised periodically. To ensure that your hard copy of the Special Instructions is the current version of the Application and Installation Guide, consult your local Caterpillar Representative. All paper copies are uncontrolled.Caterpillar reserves the right to update, improve, and or change the design of the TH31 and TH35Transmissions. Due to continuous design and product development updates, the information contained herein is subject to change without notification.
References
References for the TH31-E61 and TH35-E81Transmissions:
Special Instruction, REHS2888, "Application and Installation Guide for Oil/Gas Well Servicing Transmissions and Oil/Gas Well Servicing Power Systems (Electrical Guide)"
A&I Guide: Mechanical, REHS2887
Operation and Maintenance Manual, SEBU8197
Schematic: Electrical System, KENR6699
Specifications, System Operations and Testing and Adjusting, KENR5097
System Operations,Troubleshooting and Testing and Adjusting: Electrical System, KENR5902
System Operations,Troubleshooting and Testing and Adjusting: Monitoring System, KENR6674Reference for the TH31 - E61 Transmission:
Disassembly and Assembly, RENR9751Reference for the TH35 - E81 Transmission:
Disassembly and Assembly, RENR9659Objectives
This Special Instruction will assist OEM installation engineers and assemblers with Caterpillar's recommended procedures for the initial installation of the TH31-E61 and the TH35-E81 OEM Transmissions.
This Special Instruction will assist field engineers and operators with the TH31-E61 and the TH35-E81 OEM Transmissions in oil well service applications.Nomenclature
The TH31-E61 and TH35-E81nomenclature covers a broad range of transmission products with the same clutch sizes. Therefore, it becomes important for the owners, users, and service personnel to use the correct TH31-E61 and TH35-E81 arrangement numbers. All TH31-E61 and TH35-E81 transmissions have the same serial number prefix S/N:LWC but there are a variety of options within the serial number. Options include but are not limited to the following options: oil level sensor, PTOs, sumps, filters, yokes and flex plates. The Caterpillar Dealer will need the prefix and all of the serial number to properly identify a particular transmission.Model: TH31-E61T - TransmissionH - Derivative of a Caterpillar hauling version31 - Predominant clutch diameter in cmE - Engine mounted arrangement6 - Number of