Power Take Off (PTO)

PTO Parts for Semi Trucks

PGT Truck Parts stocks PTO parts for semi trucks and heavy equipment from Parker Chelsea, Muncie and Bezares-Eaton - complete power take-off units, rebuild kits, shift covers, air switches, gaskets and individual replacement parts. Everything is in stock and ready to ship worldwide.

With decades of experience servicing transmissions, differentials and PTOs, our team can help you find and replace the exact power take-off part you need. If you don't see your semi-truck PTO part online, or you're not sure what you need, call our PTO experts toll free at (877) 776-4600.

Shop PTO parts by brand

We carry the major truck PTO brands: Bezares-Eaton PTO units, Parker Chelsea PTOs and Muncie PTOs. Select a manufacturer below to check our PTO inventory.

Running the Eaton-Bezares line? See Bezares PTO units and parts for the 2000 series 8-bolt units, Allison 10-bolt hot-shift units, wetline kits and seal kits.

Popular PTO parts & rebuild kits

Our most-requested power take-off parts include Chelsea 489 series PTO parts and Muncie TG-series PTO parts, plus rebuild kits, shift cover & seal kits, air switches and gaskets for Chelsea 210, 272, 442, 489, 870, 880 and 890 series, Muncie CS6/CS8/TG/F20 series, and Bezares-Eaton hot-shift and wetline units.

Find your PTO parts by series

Use the parts-breakdown manuals to identify the exact part for your unit, then enter the part number in the search box above to order. We stock PTO parts for every major Chelsea, Muncie and Bezares-Eaton series, ready for immediate worldwide shipping.

Semi truck PTO questions we get every day

What is a PTO on a semi truck?

A power take-off (PTO) is a gearbox that bolts to an opening on the side or bottom of the truck's transmission. It taps engine power off the transmission's countershaft and sends it to a hydraulic pump, blower, winch or generator. That is what raises a dump body, runs a wet kit on a tractor, drives a vacuum tank or turns a mixer drum. The PTO is engaged only when the auxiliary equipment is needed and idles the rest of the time.

What are the parts of a PTO system?

A complete installation has four pieces: the PTO unit itself (6-bolt, 8-bolt or 10-bolt, sized to the transmission opening), the shift control (a cable lever, an air switch or a hot-shift electric solenoid), the output (a direct-mount pump flange or a yoke and driveshaft with slip yoke and U-joints to a remote pump), and the hydraulic pump it drives. Mounting studs, gaskets and shims complete the kit, and the gasket pack sets the gear backlash, so it is not an optional part.

What are the most common PTO problems?

The PTO will not engage or stay engaged (low air pressure to the shifter, a stretched cable, a worn shift fork or a failed solenoid), gear whine or grinding (wrong backlash after a reinstall, or a worn output gear), and oil leaks at the mounting face or output shaft (a hardened gasket or a worn seal). Most of these are repaired with a shift cover kit, a seal kit or a gasket set rather than a new unit. Use the parts-breakdown manuals linked above to find the exact kit for your series.

How much does it cost to put a PTO on a semi?

The unit is the biggest line: a basic manual-shift 6-bolt unit costs a few hundred dollars, while a heavy-duty 10-bolt hot-shift unit for an automatic runs into the low thousands. Add the pump, a driveshaft if the pump is remote-mounted, controls and shop labor for the install. Call our PTO experts at (877) 776-4600 with your transmission model and what you need to run, and we will spec the unit and quote the whole kit.