Transmissions

  • Specification Summary

  • Gross Input Power 2461 bkW
  • Gross Peak Input Torque 12677 N·m
  • Rated Input Speed 1900 r/min
  • Gears 7F/0R
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product-TH55-E70
Your operation depends on the power driving it. And your transmission is as crucial to your power solution as the engine. Cat transmissions are proven in the oil and gas industry and widely known for their exceptional power, leading durability, ease of operation, and shifting options.TH55-E70 transmissions are ideal for pressure pumping applications. TH55-E70 transmissions are optimized for use with Cat 3512C (HD), Cat 3516C (HD), Cummins QSK 50, Cummins, QSK 60, MTU 12V4000. and MTU 16V4000 engines.Cat transmissions are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty.Cat TH55-E70 oilfield transmission. Gross input power: 2461 bkW (3300 bhp).

Transmission Specifications

Gross Input Power 2461 bkW
Gross Peak Input Torque 12677 N·m
Rated Input Speed 1900 r/min
Gears 7F/0R
1F Gear Ratio 6.25
2F Gear Ratio 4.59
3F Gear Ratio 3.38
4F Gear Ratio 2.48
5F Gear Ratio 1.83
6F Gear Ratio 1.36
7F Gear Ratio 1.00

Cat Engines for Optimized Power Train

 Cat C3512C (HD)

 Cat 3516C (HD)

 Cummins QSK50

 Cummins QSK60

 MTU 12V4000

 MTU 16V4000

Transmission Rotation

 Input rotation — counterclockwise

 Output rotation — counterclockwise(as viewed from rear)

Torque Converter

 Integral torque converter

 Series — TC64442-ESLF

 Stall torque ratio — 2.23

Clutches

 Clutches — electro-hydraulic fully modulated, oil cooled, multidisc

 Clutch modulation control — Cat Electronic Clutch Pressure Control (ECPC)

Installation Connections

 2 oil cooler lines

 1 electrical connector

 1 pump

Oil System

 Cat Transmission/Drive Train Oil-4 (TDTO)

 Sump oil temperatures

 Hydraulic fill capacity — Approx. 189 L (50 gal), subject to cooler size, lines, and installation.

 Filter Type — 6 micron synthetic, cartridge remote mount

Mountings

 Input connection (flywheel) — SAE #0

 Output connections (flange)

 Structural application subject to Caterpillar approval

Input connection (flywheel) — SAE #0

Output connections (flange)

Structural application subject to Caterpillar approval

Control System

 Electronic Control Unit (ECU)

 Electronic data link, SAE J1939

 Electrical system 24V

Electronic Control Unit (ECU)

Electronic data link, SAE J1939

Electrical system 24V

Power Take-Off Drives

 Location

 Mounting type

 Rated power