Chelsea PTO 645 Series Parts Manual
This Chelsea Illustrated Parts List covering the 645 PTO helps you identify the correct gear sets, shifter kits and service parts for your power take-off before you order.
| Models covered | 645 |
| PTO type | Chelsea 600 Series |
| Document | Illustrated Parts List (Chelsea) |
| Length | 13 pages |
| Format | PDF — view below or download free |
What’s inside
- Gear sets & output shaft assemblies
- Shifter & air-shift control kits
- Mounting gaskets & adapter plates
- Housings & cover assemblies
- Seal, bearing & snap-ring kits
- Application & ratio reference tables
- Exploded views with OEM part numbers
Read the manual
This is our interactive copy of the factory manual — part numbers are clickable and every exploded-view callout links to the part. Plain factory PDF if you prefer it.
Chelsea parts & units we stock
Pro Gear and Transmission stocks new, remanufactured and good-used parts for Chelsea PTO units:
Chelsea 645 parts list — every part number linked
This is the bill of materials from the manual above, matched against our own stock. Click any part number to see the listing and current price, or use ▶ Add to drop it straight in your cart. 19 of the 20 lines in this book are parts we carry.
Prices are shown on each product page so you always see the current one. Anything not linked, or marked no longer available, we can still usually source — call (877) 776-4600.
Prefer the book? Download the interactive PDF — same manual, with every part number and every exploded-view balloon clickable.
Bill of Materials — manual page 6
| Item | Part number | Description | Qty | Order |
|---|---|---|---|---|
| 626 628 630 645 | ||||
| 1 | 42-P-217X | Adapter Body Assembly Standard Mount 1 or | ▶ Add | |
| 42-P-220X | Adapter Body Assembly Standard Mount 1 or | ▶ Add | ||
| 42-P-231X | Adapter Body Assembly Standard Mount 1 or | ▶ Add | ||
| 42-P-223X | Adapter Body Assembly Standard Mount 1 or | ▶ Add | ||
| 42-P-221X | Adapter Body Assembly Deep Mount | 1 | ▶ Add | |
| 42-P-232X | Adapter Body Assembly Deep Mount | 1 | ▶ Add | |
| 42-P-224X | Adapter Body Assembly Deep Mount | 1 | ▶ Add | |
| 4 | 9-P-88 | Idler Shaft 1 or 1 or 1 or 1 or | ▶ Add | |
| 7 | 28-P-191 | O-Ring (For Slip Fit Idler Shaft) 1 1 1 | 1 | ▶ Add |
| 8 | 31-P-102 | Thrust Washer 1 1 1 | 1 | ▶ Add |
| 10 | 379672 | O-Ring Plug w/ Sockethead Face (NWD Plug) 1 1 1 | 1 | ▶ Add |
| 11 | 550439 | Tapered Bearing Cone 2 2 2 | 2 | ▶ Add |
| 328075X | Pressure Lube Hose Assembly 1 1 1 | 1 | ▶ Add | |
| 328948-26X | Sealant & Installation Instructions ("D" Mount Only) 1 1 call to confirm availability | 1 | ||
| 328948-22X | Gasket & Installation Instructions (All Other Mounting Types) 1 1 | 1 | ▶ Add | |
| 328948-20X | Gasket & Installation Instructions (All Mounting Types) | 1 | ▶ Add | |
| 328170-76X | Stud Kit (Adapter to Transmission / Std. Mount) 1 or 1 or 1 or | ▶ Add | ||
| 328170-77X | Stud Kit (Adapter to Transmission / Deep Mount) 1 1 | 1 | ▶ Add | |
| 328170-209X | Stud Kit (Adapter to Transmission / "X" & "Z" Mount) 1 or | ▶ Add | ||
| 328170-201X | Stud Kit (Adapter to Transmission / Metric "G" Mount) | 1 | ▶ Add | |
Part numbers and descriptions are taken from the Chelsea/Parker parts manual on this page. Chelsea® and Parker® are trademarks of Parker Hannifin Corporation; Pro Gear and Transmission is an independent distributor.