TH55-E70 Oilfield Transmission

  • Overview
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Engine Specifications
Gross Input Power 2461.0 bkW (3300.0 bhp)
Gross peak input torque 12677.0 N·m (9350.0 ft-lb)
Rated input speed 1900.0 RPM (1900.0 RPM)
Gears 7F/0R
1F gear ration 6.25
2F gear ration 4.59
3F gear ration 3.38
4F gear ration 2.48
5F gear ration 1.83
6F gear ration 1.36
7F gear ration 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
      • Continuous — 194°F (90°C)
      • Maximum Intermittent — 210°F (99°C)
      • Continuous — 90°C (195°F)
      • Maximum Intermittent — 99°C (210°F)
    • 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
      • GWB 390.65
      • GWB 390.70 > 2500 hp
    • Structural application subject to Caterpillar approval
  • Control System
    • Electronic Control Unit (ECU)
    • Electronic data link, SAE J1939
    • Electrical system 24V
  • Power Take-Off Drives
      • 3 o’clock and 11 o’clock from rear
      • SAE 8 bolt (J704) @ 3 o’clock*
      • SAE C-size (J744) @ 11 o’clock
      • 2- and 4-bolt mount
      • *Pump drive subject to 15 kW (20 hp) @ 1900 rpmlimitation until device is approved by Caterpillar
      • 112 kW/150 hp continuous

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