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Parts, Units & Engineering

Twin Disc Transmissions

Palmer Johnson is an authorized Twin Disc distributor and service center. Palmer Johnson maintains an extensive inventory of Twin Disc units and genuine Twin Disc replacement parts. Palmer Johnson has the experience you're looking for - more than 30 years servicing and selling Twin Disc products.

Twin Disc manufactures heavy-duty powershift transmissions, marine gears, power take-offs, hydraulic PTOs, clutches, pump drives, torque converters and other power transmission components.

7500 Series

Twin Disc Oil & Gas Industry Brochure

Twin Disc TA90 7500

Details

7500 Series Specifications

Features and Benefits

Lightweight yet durable aluminum housings reduce overall vehicle weight
Does not require a torque converter, further contributing to overall weight savings
Compact in size and able to fit between a mobile equipment’s frame rails
Overall length of 1546 mm (61 in) provides narrow footprint
Smaller gear ratio steps provide delivery of higher average power
Less complicated plumbing makes it easier to fit into the cramped quarters of a frac rig
Offers two live 149 kW PTOs
Includes a torsional coupling
Automatic electronic oil level system available
In most cases, standard engine oil may be used, simplifying servicing requirements
Designed to match engine life
Made in America, the TA90-7500 transmission features the same reliability and robust design on which Twin Disc built its reputation

7500 Series Overview

TA90-7500 – Up to 1939 kW (2600 hp) at 1900 rpm

Designed to match engine life, the new 7500 Series automatic transmission consists of a 9-speed coaxial power-shift transmission and an advanced electronic control system, with a maximum gross input power rating up to 1939 kW (2600 hp) at 1900 RPM.

7600 Series

Twin Disc TA90 7601

Details

7600 Series Specifications

Features and Benefits

Designed to match the engine life on pressure pumping rigs for oil and gas well stimulation. The robust, simplicity of the counter shaft design provides for an expected L10 life of 10,000 hours.
Designed specifically for the pressure pumping market, the transmission does not require throttle dipping for any of the range to range shifts. It is designed to be power shifted under all loaded or unloaded situations.
Lightweight yet durable aluminum housings to reduce overall vehicle weight.
Automated line test/hydraulic pressure test for pressure pumping applications.
Does not require a torque converter, further contributing to overall weight savings.
Compact in size and able to fit between the frame rails of mobile equipment.
Small and evenly spaced gear ratio steps ensure that well pressure does not drop during gear shifts.
Simple plumbing to ease installation in the cramped quarters of a pressure pumping rig.
In most cases uses the same oil as the engine, simplifying onsite fluids logistics and servicing requirements.
Includes a highly flexible coupling to reduce the damaging effects of the torsional excitations by the engine and piston pump.
Internal brake capability to hold the output shaft when not pumping.
Oil fill port and sight glass are co-located, making oil fills a one person operation.

7600 Series Overview

TA90-7601 – Up to 1939kW (2600hp) at 1900 rpm

The 7601 Series transmission system consists of a 9 speed coaxial power-shift transmission and the advanced TDEC-500 electronic control system.

8500 Series

TA91-8501 Bulletin

Twin Disc Oil & Gas Industry Brochure

Details

8500 Series Specifications

Features and Benefits

Increased performance: efficient gear train combined with electronic controls tailored to the needs of the specific application to optimize machine performance.
Safety: the control system looks after the transmission so the operator can focus on the operation of the machine. Speeds and interlocks can be programmed to meet the needs of the specific machine.
Ease of operation: available automatic shifting or manual power shift combined with shift inhibits and interlocks simplify the operator’s job and allows for concentration on the job rather than the powertrain.
Reduced downtime: Durable heavy-duty components, combined with electronic controls which prevent overspeed, shift shocks and reduce the effects of operator’s error, result in increased machine availability and less wear and tear on other machine components.

Applications

Oil Field Fracturing Rigs
Mine Haul trucks
Anchor Hoists
Special Purpose Equipment

8500 Series Overview

TA90-8501 – Up to 2300kW (3000hp) at 2100 rpm

The 8501 transmission system consists of an engine mounted 21 or 23 inch type 8 torque converter, a 9 speed coaxial power-shift transmission and an advanced electronic control system.

TD61-1180 ARFF

Twin Disc TD61 1180 ARFF

Details

TD61-1180 ARFF Specifications

Specifications

Maximum gross input power (ARFF only) 705 hp (526 kW)
Maximum input speed 2300 RPM
Weight 1700 lbs. (770 kg)
Maximum oil temperature at converter outlet 250 F
Sump capacity 7 USG (26.5 liters)
Cooling required ~25% of GHP
Cooling pump capacity ~44 GPM @ 2100 RPM
Remote mounted
30-70, 50-50, 70-30 with differential lock
TD61-1180 output rotation opposite engine for forward

TD61-1180 ARFF Overview

TD61-1180 – UP TO 705 HP (526 kW)

The 1180 transmission system consists of an engine mounted 17.5 or 18.5 inch type 8 torque converter, a 6 speed power-shift transmission and an advanced electronic control system.

TD61-1180 AWD

Twin Disc TD61 1179 TD61 1180 AWD

Details

TD61-1180 AWD Specifications

Applications

Military vehicles
Haul trucks
ADTs
Heavy-duty off-road vehicles

TD61-1180 AWD Overview

TD61-1179/TD61-1180 – Up to 402 kW (540 hp) at 2100 rpm

The 1180 AWD Series transmission system consists of an engine mounted 17.5 or 18.5 inch type 8 torque converter, a 6-speed power-shift transmission, and an advanced electronic control system.

Features and Benefits

Full-time all-wheel drive with shift on the fly differential lock provides high performance in off-road conditions.
Advanced electronic controls provide ease of operation and maximum flexibility in tailoring the transmission system performance to the specific application.
Reduced downtime: Durable heavy-duty components, combined with electronic controls that prevents overspeed, shift shocks and reduce the effects of operator error, result in increased machine availability and less wear and tear on other machine components.

TD61-2619 AWD

Twin Disc Td61 2619 Transmission

Details

TD61-2619 AWD Specifications

Typical Applications

ARFF vehicles
Military vehicles
Haul trucks
ADTs
Heavy-duty off-road vehicles

TD61-2619 AWD Overview

TD61-2619 – Up to 746kW (1000hp) at 2300 rpm

The 2619 AWD Series transmission system consists of an engine mounted 17.5 or 18.5 inch type 8 torque converter, a 6 speed power-shift transmission and an advanced electronic control system.

Features and Benefits

Full-time all-wheel drive with shift on the fly differential lock provides high performance in off-road conditions.
Advanced electronic controls provide ease of operation and maximum flexibility in tailoring the transmission system performance to the specific application.
Reduced downtime: Durable heavy-duty components, combined with electronic controls that prevents overspeed, shift shocks and reduce the effects of operator error, result in increased machine availability and less wear and tear on other machine components.

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Palmer Johnson Power Systems

Parts, Units & Engineering

Twin Disc Transmissions

7500 Series

7500 Series Specifications

Features and Benefits

7500 Series Overview

TA90-7500 – Up to 1939 kW (2600 hp) at 1900 rpm

7600 Series

7600 Series Specifications

Features and Benefits

7600 Series Overview

TA90-7601 – Up to 1939kW (2600hp) at 1900 rpm

8500 Series

8500 Series Specifications

Features and Benefits

Applications

8500 Series Overview

TA90-8501 – Up to 2300kW (3000hp) at 2100 rpm

TD61-1180 ARFF

TD61-1180 ARFF Specifications

Specifications

TD61-1180 ARFF Overview

TD61-1180 – UP TO 705 HP (526 kW)

TD61-1180 AWD

TD61-1180 AWD Specifications

Applications

TD61-1180 AWD Overview

TD61-1179/TD61-1180 – Up to 402 kW (540 hp) at 2100 rpm

Features and Benefits

TD61-2619 AWD

TD61-2619 AWD Specifications

Typical Applications

TD61-2619 AWD Overview

TD61-2619 – Up to 746kW (1000hp) at 2300 rpm

Features and Benefits

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