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The image has a blue background in various shades. In the top left-hand corner is the Muncie Power Products PowerBurst logo. Below that, in white capped letters are "A20 Series." To the right of the words is a picture of the A20 Series power take-off.

POWER TAKE-OFF PERFORMANCE YOU CAN COUNT ON

The A20 Series PTO is a medium-duty, clutch shift PTO engineered for Allison 3000 and 4000 Series transmissions. Its 10-bolt design, rotatable pump flange with 30 positions, and proven clutch-pack durability deliver up to 415 lbs.ft. of intermittent/continuous torque while simplifying installation, reducing noise, and minimizing leak paths.

 

Target Markets

  • Class 7–8 trucks with automatic transmissions

  • Dump

  • Fire

  • Refuse

  • Utility

  • Tow & Recovery

  • Snow & Ice

  • Bulk Hauling

CONFIGURE YOUR A20 SERIES PTO

Start with your Allison transmission. Follow these easy steps. 

Key Features

  • Rotatable pump flange for optimal clearance
  • Increased clearance for easier installation
  • Shift cover allowing 360-degree rotation
  • Proven clutch pack design
  • Tapered roller bearings increasing PTO life
  • Increased output shaft diameter for higher durability
  • Reduced leak paths
  • Maximized gear design for noise reduction
  • Single intermittent/continuous torque rating of 415 lbs.ft.
  • Three housing arrangements
  • Extended-length PTO mounting fasteners
  • Tool kit available for easier installation

specifications

                                                                                                                                          
SPEED RATIO 3000 SERIES ENGINE %
 4000 SERIES ENGINE % INTERMITTENT/CONTINUOUS HP (KW) @ 1,000 RPM
 INTERMITTENT/CONTINOUS TORQUE LBS.FT. (NM)
05 74% 105% 77 (57) 400 (542)
06 85% 122% 77 (57) 400 (542)
07 99% 141% 79 (59) 415 (563)
08 114% 163% 69 (51) 360 (488)
09 122% 175% 65 (48) 340 (461)
10 131% 187% 59 (44) 310 (420))
11 151% 215% 52 (39) 275 (373)
12 162% 231% 50 (37) 265 (359)
15 201% 287% 39 (29) 205 (278)

 

compatiable components

The image shows the A20 Series with a Muncie Start module attached.

Muncie Start®

Muncie Start® is an electronically controlled, modulated clutch engagement system that prevents torque spikes through the PTO, drivetrain, and auxiliary equipment during startup. By enabling smooth PTO engagement for high-inertia loads, it extends the life of the PTO and driven components.

The image shows an Allison 3000 transmission with an A20 Series mounted to it and an EX Drive Shaft Extension mounted to the PTO with a pump support bracket.

EX Drive Shaft Extension

The EX Drive fits Allison 3000 and 4000 Series transmissions with a retarder or cooler and allows large gear or piston pumps to be direct mounted, eliminating driveline installations. It delivers maximum PTO torque and is available for the A20 Series.

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