TH55-E70 Oilfield Transmission
THE RUNDOWN
Transmission Specifications
| Gross Input Power | 3300.0BHP |
| Gross Peak Input Torque | 9350.0ft-lb |
| Rated Input Speed | 1900.0r/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 |
Standard Equipment
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
Control System
- Electronic Control Unit (ECU)
- Electronic data link, SAE J1939
- Electrical system 24V
Power Take-Off Drives
- Location
- Mounting type
- Rated power
