Muncie A20A1007HX3BBPX is a medium-duty, 10-bolt clutch-shift PTO for compatible Allison 3000/4000 Series transmissions. Its BB direct-mount output combines an SAE B 2- and 4-bolt pump flange with a 7/8-inch, 13-tooth SAE B spline. The A10 input gear, ratio-07 gearing, HX 12 V electric/hydraulic shift, arrangement 3, and PX standard hose kit define this exact configuration.
This PTO is for a properly matched hydraulic pump mounted directly to its output flange. The hydraulic pump is selected separately. Check the pump's mounting pattern, input spline, rotation, operating speed and load, as well as vehicle clearance and the complete Allison transmission identification.
Direct mounting with flexible flange positioning
The rotatable pump flange provides 30 positions to help orient a compatible pump around chassis and component clearance. Arrangement 3 locates the output left side and low relative to the transmission opening. The A20 series also uses tapered roller bearings and a rotatable shift cover; the HX/PX activation package supplies the cab switch assembly and standard pressure hose components for installation.
| Feature |
Practical benefit |
| SAE B 2- and 4-bolt flange |
Accepts a separately selected compatible direct-mount pump. |
| 7/8-inch, 13-tooth spline |
Identifies the pump input that must mate with this BB output. |
| 30 flange positions |
Allows pump orientation to be selected around available chassis clearance. |
| HX/PX configuration |
Provides 12 V electric/hydraulic activation and the standard hose kit. |
Technical specifications
| Specification |
A20A1007HX3BBPX |
| Manufacturer part number |
A20-A1007-HX3BBPX |
| Series / mounting |
A20 medium-duty clutch-shift; Allison 10-bolt opening |
| Input gear / internal ratio |
A10 for Allison 3000/4000 Series; ratio 07, 0.73:1 |
| Output speed |
99% of engine speed for the listed Allison 3000 application; 141% for the listed Allison 4000 application |
| Output rating |
415 lb-ft continuous and intermittent; 79 hp at 1,000 PTO rpm |
| Shift / arrangement |
HX 12 V electric/hydraulic; arrangement 3 left-side shaft-low |
| Output / hose option |
BB: SAE B 2- and 4-bolt flange, 7/8-inch 13-tooth SAE B spline; PX: standard hose kit |
Applications and included components
Muncie's exact builder lists this model for an Allison 3000 Series application with serial prefix 6520 and output at 99% of engine speed. It also lists an Allison 4000 Series application with serial prefix 6610 and 141% output. These are application examples, not universal fitment for every 3000 or 4000 transmission. Confirm the exact model and serial number, transmission drive limits, mounting location and pump clearance.
| Component or application |
Selection detail |
| Allison 3000 Series |
Exact builder lists serial prefix 6520xxxxxx with 99% engine-speed output. |
| Allison 4000 Series |
Exact builder lists serial prefix 6610xxxxxx with 141% engine-speed output. |
| HX/PX installation kit |
Current 48TK6720 kit includes the 30T43806 12 V switch assembly, pressure switch, harness, Allison input cable, standard 28-inch hose kit, studs, gasket and labels. |
| Cab control and options |
30T43806 includes rocker 30T35687, bracket 36T42362 and faceplate 36T42380. Muncie Start and overspeed control are separate options. |
Before ordering
| Check |
Why it matters |
| Transmission |
Verify its exact model, serial number, 10-bolt opening, PTO drive rating and mounting side. |
| Pump interface |
Match the SAE B 2- or 4-bolt flange and 7/8-inch 13-tooth input spline; verify pump rotation and support requirements. |
| Speed, load and clearance |
Size the pump for the applicable 99% or 141% engine-speed relationship, PTO rating and available vehicle space. |
| Activation and plumbing |
Provide 12 V power, connect the Allison PTO enable circuit while engaged, route the hose correctly and place the indicator in the operator's view. |
Need help confirming PTO fit and a direct-mount pump? Contact UnitedBuilt through online chat, email parts@unitedbuilt.com, or call 602-253-7750 with your transmission model and serial number, pump interface, and chassis details.
