Muncie 48TK6720 is the 12 V installation kit for A20 clutch-shift PTOs coded HX***PX: integral-solenoid activation with the standard 28-inch hose arrangement. It brings the cab switch, activation wiring, pressure switch, hose and mounting components together for the specified Allison 10-bolt installation. The PTO and driven pump are sold separately.
This is the newer kit for an A20 with an unpainted rear cover and a -5 ORB lubrication connection. Earlier blue-painted rear covers used a -4 ORB connection and kit 48TK6583. Confirm the PTO's complete model number and rear-cover fitting before using this kit as a replacement.
Controls and plumbing for the HX/PX setup
The included 30T43806 12 V switch kit contains the cab rocker, bracket and faceplate. The 34T43180 Allison input cable and harness support the required PTO-enable connection, while the pressure switch supports the engaged indicator. The 28-inch hose kit and -5 ORB fitting serve the A20 pressure-lubrication connection. Muncie Start and an overspeed switch are separate options.
| Feature |
Practical benefit |
| 12 V switch assembly |
Provides a cab-mounted rocker and indicator faceplate for the HX control circuit. |
| Allison activation wiring |
Provides the harness and input cable used with the transmission PTO-enable connection. |
| Standard hose arrangement |
Includes the 28-inch hose kit for a compatible PX installation. |
| Mounting parts |
Includes the stud kit, Allison 10-bolt gasket and safety labels. |
Technical specifications
| Specification |
48TK6720 |
| Manufacturer part number |
48TK6720 |
| PTO configuration |
A20 HX***PX, 12 V integral-solenoid activation, non-Muncie Start |
| Hose option |
PX standard 28-inch hose kit, 43TK3881 |
| Rear-cover connection |
Includes 43T64636 -5 ORB lubrication fitting for the newer unpainted rear cover |
| Cab switch |
30T43806 12 V switch kit with rocker 30T35687, bracket 36T42362 and faceplate 36T42380 |
Kit contents
These are the components listed for 48TK6720. The hose kit and stud kit are included as kits; check the installation instructions for their individual hardware and fittings.
| Component and quantity |
Muncie part number |
| 12 V switch kit — 1 |
30T43806 |
| Pressure switch — 1 |
30T60223 |
| 10 A fuse and holder — 1 |
33T36299 |
| Butt splice — 1 |
34M18002 |
| Ring terminals — 2 |
34M18009 |
| 3/16-inch female spade terminals — 2 |
34M18187 |
| Female spade terminals — 3 |
34M18250 |
| Wire harness — 1 |
34T40902 |
| Allison input cable — 1 |
34T43180 |
| Grommet — 1 |
37T35674 |
| 6-foot wire — 1 |
37T42506 |
| -5 ORB lubrication fitting — 1 |
43T64636 |
| 28-inch hose kit — 1 |
43TK3881 |
| Elbow — 1 |
43T43712 |
| Stud kit — 1 |
20TK6566 |
| Allison 10-bolt gasket — 1 |
13T35777 |
| Safety labels — 1 |
36MK3841 |
Before ordering
| Check |
Why it matters |
| PTO code |
Confirm A20 HX***PX; other shift and hose codes use different installation kits. |
| Rear cover |
Match the included -5 ORB fitting to the unpainted cover. An earlier blue-painted cover used a -4 ORB fitting and 48TK6583 kit. |
| Hose length and routing |
Confirm the standard 28-inch hose reaches the required transmission port without strain. |
| Vehicle controls |
Verify 12 V supply, Allison PTO-enable connection and an engaged indicator visible to the operator. |
Need help confirming the right A20 installation kit? Contact UnitedBuilt through online chat, email parts@unitedbuilt.com, or call 602-253-7750 with your complete PTO model number and photos of the rear cover and hose connection.
