Muncie part number 12T64593 is a Parbak 8-013 back-up ring used in Muncie power takeoff assemblies. Per Muncie's own service parts document SP14-01, this back-up ring appears at multiple positions within the PTO seal and sealing-ring stack, indicating it is a recurring sealing component throughout the unit. Parbak rings are secondary back-up rings designed to support O-rings and Viton seals under pressure, preventing extrusion in hydraulic and pneumatic applications. If you are rebuilding a Muncie PTO and need this ring, give us a call to confirm which service kit or positions apply to your specific unit.
Features
Genuine Muncie part number 12T64593
Parbak 8-013 back-up ring configuration
Used at multiple positions in the Muncie PTO seal stack (positions 3, 5, 9, and 11 per SP14-01)
Designed to support Viton O-ring seals and prevent extrusion under pressure
Referenced in Muncie service parts document SP14-01
Tech Specs
- Part Number: 12T64593
- Component Type: Parbak 8-013 back-up ring
- Positions Used: 3, 5, 9, 11 (per Muncie SP14-01)
- Quantity per Position: 1
