Description
The Chelsea 28P178 piston O-ring is a sealing ring for Chelsea power takeoff (PTO) assemblies. It measures roughly 4.75 in. across with a .14 in. cross section, sitting behind the shift piston to hold air or hydraulic pressure during PTO engagement. Chelsea lists it under part number 28-P-178, and it cross-references to 1450-28P178, S-15621, HM28P178, and WA20-04-3012. This is a genuine Chelsea PTO component sold by Pro Gear and Transmission. Not sure this is the O-ring for your PTO? Give us a call to confirm proper fit for your application.
Features
Genuine Chelsea PTO piston O-ring, part number 28P178 or 28-P-178
Approximately 4.75 in. outer dimension with a .14 in. cross section
Seals the shift piston inside Chelsea power takeoff assemblies
Cross-references: 1450-28P178, S-15621, HM28P178, WA20-04-3012
Sold by Pro Gear and Transmission
Tech Specs
- O-Ring type: piston seal
- Cross section: .138 in. (about .14 in.)
- Diameter: about 4.484 in. to 4.75 in.
- Chelsea part number: 28P178 or 28-P-178
- Cross reference: 1450-28P178, S-15621, HM28P178, WA20-04-3012
Used in 21 Chelsea PTO models
| 230 Series | 231 Series | 236 Series | 238D Series |
| 272 Series | 272F Series | 272U Series | 280 Series |
| 281 Series | 281L Series | 282 Series | 287 Series |
| 800 Series | 870 Series | 870L Series | 871 Series |
| 871L Series | 878 Series | 890 Series | 892 Series |
| 897 Series |
