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QUICKSHIFT®TRANSMISSION

MGX-6620A

The perfect propulsion system starts with the technology of Twin Disc’s QuickShift transmissions. This fully integrated system includes the transmission, clutch, valves, actuators and electronic controls resulting in fast, smooth clutch engagement, exceptional boat handling, precise speed control and an incredibly smooth ride.

Standard Equipment
  • Vertical offset, aluminum housing
  • 10° down angle on output shaft
  • Electric GP-valve with manual override
  • EC600PC profile module – interface for engagement signals
  • Integral oil cooler for raw water cooling
  • Oil strainer and oil filter
Options
  • SAE J617 housing no. 1
  • SAE J617 housing no. 0
  • Flexible coupling for 14” flywheel (SAE J620 size 355)
  • Flexible coupling for 18” flywheel (SAE J620 size 460)
  • Input flange for freestanding installation
  • EC600PC e-troll module and propulsion control system
  • Output shaft driven trailing pump
  • Companion flange/ bolts set
  • Monitoring devices to customer’s specification
  • Mounting brackets
  • Live PTO
    • SAE J744 size 101-2, 25-4 (SAE “B-B”, 2-bolt) – max. 337 Nm
    • SAE J744 size 127-4, 32-4 (SAE “C”, 4-bolt) – max. 600 Nm
  • Hydraulic Clutchable PTO
    • SAE J744 size 127-4, 32-4 (SAE “C”, 4-bolt) – max. 600 Nm
  • Secondary live PTO for power steering pumps
    • SAE J744 size 101-2, 22-4 (SAE “B”, 2-bolt) – max. 75 Nm or
    • SAE J744 size 82-2, 16-4 (SAE “A”, 2-bolt) – max. 75 Nm
INPUT RATINGS

Reduction Ratios

Pleasure Craft

Light Duty

Intermediate Duty

Medium Duty

Continuous Duty

:1

@ 2300 RPM

@ 2300 RPM

@ 2100 RPM

@ 1800 RPM

@ 1800 RPM

1.55, 1.72, 2.09

1566 kW
(2100 hp)

1417 kW
(1900 hp)

1234 kW
(1655 hp)

1021 kW
(1369 hp)

950 kW
(1274 hp)

2.28, 2.42

1566 kW
(2100 hp)

1417 kW
(1900 hp)

1145 kW
(1535 hp)

943 kW
(1265 hp)

833 kW
(1117 hp)

2.73

1504 kW
(2017 hp)

1330 kW
(1784 hp)

1014 kW
(1360 hp)

835 kW
(1120 hp)

780 kW
(1046 hp)

* Ratings shown for use with standard right hand rotation engines. The maximum allowable rated engine speed is 2500 rpm.

DIMENSIONS & WEIGHT

Specifications subject to change without prior notice in the interest of continual product improvement. Contact your local Twin Disc representative for engineering specifications, Survey Society Approvals and Classifications.

Enlarge

C

316 mm (12.44”)

S

184 mm (7.25”)

F

653 mm (25.71”)

L

340 mm (13.39”)

R

340 mm (13.39”)

A

10°

Weight

580 kg *

* dry weight, including SAE #0 housing and SAE 460 flexible coupling

Installation Drawings:
Installation Drawings:

Drawing Number

Input Connection

Control Valve

Heat Exchanger

PTO

Notes

Download

740990

SAE #0 / 18″

electric, EC300 interface

Yes

SAE C (live)

740990A

SAE #0 / 18″

electric, EC300 interface

Yes

SAE B (live)

P72847

SAE #0 / 18″

electric, EC050

Yes

SAE C (live)

trailing pump

DWG
STEP
IGS

P72847A

SAE #0 / 18″

electric, EC300 interface

Yes

SAE C (live)

trailing pump

DWG
STEP

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