Chelsea PTO 438 Series Parts Manual
Model Number Designation
| Item | Part No. | Description | Qty | Notes | Price |
|---|
Power Take-Off Bill of Materials 438 Series
| Item | Part No. | Description | Qty | Notes | Price | |
|---|---|---|---|---|---|---|
| 1 | 1P483 | Housing | 1 | — | Call for availability | |
| 2 | 2P699 | Gear, Output | 1 | $259.97 | Add to Cart | |
| 3 | 5P951 | Gear, Input | 1 | — | Call for availability | |
| 4 | 9P72 | Shaft, Idler | 1 | $30.31 | Add to Cart | |
| 5 | 14P15 | Spacers, Input Gear | A/R | $5.70 | Add to Cart | |
| 8 | 22P241 | Gasket, Bearing Cap (.010) | A/R | $2.30 | Add to Cart | |
| 22P242 | Gasket, Bearing Cap (.020) | A/R | $10.49 | Add to Cart | ||
| 22P243 | Gasket, Bearing Cap (.015) | A/R | $10.49 | Add to Cart | ||
| 10 | 35P8 | Gasket, Shifter Cover | 1 | $3.48 | Add to Cart | |
| 68P2 | Name Plate (u .s.a.) | 1 | $2.65 | Add to Cart | ||
| 13 | 328274X | Bearing Cap Assembly (closed) | 1 | $64.09 | Add to Cart | |
| 14 | 378391 | Lockring | 2 | $2.47 | Add to Cart | |
| 15 | 378422 | Drive Screw | 2 | $11.52 | Add to Cart | |
| 16 | 37843010 | Capscrew, Hex Head (.312-18 X 1 .000) | 4 | $1.76 | Add to Cart | |
| 17 | 3784527 | Set Screw (.250-20 X .500) | 1 | $4.37 | Add to Cart | |
| 19 | 550397 | Bearing Cone | 1 | $36.75 | Add to Cart | |
| 20 | 550439 | Bearing Cone | 2 | $51.63 | Add to Cart | |
| 21 | 550532 | Bearing Cone | 1 | $36.75 | Add to Cart | |
| 64 | 3784308 | Capscrew, Hex Head (.312-18 X .750) “xr” Output | 4 | $2.06 | Add to Cart | |
| 66 | 3P283 | Shaft, Output | 1 | $187.84 | Add to Cart | |
| 67 | 28P216 | Oil Seal | 1 | $21.40 | Add to Cart | |
| 68 | 329194X | Pump Flange Assembly (21 -P-574) | 1 | $135.04 | Add to Cart | |
| 69 | 379673 | Shoulder Stud (.312-24) | 4 | $12.77 | Add to Cart | |
| 70 | 379063 | Flat Washer “xd” Output | 4 | $2.70 | Add to Cart | |
| 72 | 3P202 | Shaft, Output | 1 | $95.42 | Add to Cart | |
| 73 | 28P216 | Oil Seal | 1 | $21.40 | Add to Cart | |
| 74 | 328273X | Bearing Cap Assembly (open) | 1 | $64.09 | Add to Cart | |
| 75 | 37843010 | Capscrew, Hex Head (.312-18 X 1 .000) | 4 | $1.76 | Add to Cart | |
| 76 | 50000729 | Woodruff Key “xq” Output | 1 | $3.11 | Add to Cart | |
| 79 | 3P282 | Shaft, Output (pump) | 1 | $187.84 | Superseded by 3P282XAdd to Cart | |
| 80 | 28P216 | Oil Seal | 1 | $21.40 | Add to Cart | |
| 81 | 328589X | Bearing Cap Assembly (21 -P-269) | 1 | $324.47 | Add to Cart | |
| 82 | 3784478 | Capscrew, Socket Head (.312-18 X 1 .500) “ra” Output | 4 | $2.32 | Add to Cart | |
| 83 | 3P283 | Output Shaft | 1 | $187.84 | Add to Cart | |
| 84 | 28P216 | Oil Seal | 1 | $21.40 | Add to Cart | |
| 85 | 329195X | Pump Flange Assembly (21 -P-574) | 1 | $132.25 | Add to Cart | |
| 86 | 21P628 | Pump Flange 2-Bolt Rotating | 1 | $100.24 | Add to Cart | |
| 87 | 3784476 | Socket Head Capscrew (.312-18 X 1 .000) | 4 | $4.33 | Add to Cart | |
| 32859153X | Pump Field Conversion Kit (“xr” To “ra”) | $122.93 | Add to Cart | |||
| 32859155X | Pump Field Conversion Kit (“xd” To “ra”) “ra” Output | $382.35 | Add to Cart | |||
| 88 | 3P283 | Output Shaft | 1 | $187.84 | Add to Cart | |
| 89 | 28P216 | Oil Seal | 1 | $21.40 | Add to Cart | |
| 90 | 329195X | Pump Flange Assembly (21 -P-574) | 1 | $132.25 | Add to Cart | |
| 91 | 21P572 | Pump Flange 4-bolt Rotating | 1 | $114.69 | Add to Cart | |
| 92 | 3784476 | Socket Head Capscrew .312-18 X 1 .000 | 4 | $4.33 | Add to Cart | |
| 32859154X | Pump Field Conversion Kit (“xr” To “ra”) | $122.93 | Add to Cart | |||
| 32859156X | Pump Field Conversion Kit (“xd” To “ra”) Loose Parts | $382.35 | Add to Cart | |||
| 717072X | Stud Kit | 1 | $53.10 | Add to Cart | ||
| 35P72 | Gasket, Mounting | 2 | — | Call for availability | ||
| 3289616X | Gasket & Installation Instructions | 1 | $45.94 | Add to Cart | ||
| 95 | 32834615X | Cable Control Assembly | 1 | $187.92 | Add to Cart | |
| 328380X | Cable Control Parts Bag | 1 | $13.25 | Add to Cart | ||
| 328751X | Installation Kit | 1 | $65.59 | Superseded by 3287511XAdd to Cart | ||
| 32838837X | Installation Kit, Air Shift | 1 | $367.41 | Add to Cart | ||
| 328711X | Installation Kit, “xr” Pump | 1 | $14.26 | Add to Cart |
Cable Shift Control Assembly 438 Series Assembly 4 & 6
| Item | Part No. | Description | Qty | Notes | Price | |
|---|---|---|---|---|---|---|
| 3290381X | Cable Shifter Assembly (3 & 6) | 1 or | — | Call for availability | ||
| 3290382X | Cable Shifter Assembly (4 & 5) | 1 | — | Call for availability | ||
| 26 | 28P191 | O-ring | 1 | $3.59 | Add to Cart | |
| 27 | 34P74 | Shifter Cover Gasket | 1 | $44.57 | Add to Cart | |
| 28 | 37P19 | Shifter Spring | 1 | $2.04 | Add to Cart | |
| 29 | 51P22 | Shifter Lever | 1 | $12.57 | Add to Cart | |
| 30 | 63P16 | Poppet Pin | 1 | $9.26 | Add to Cart | |
| 32 | 3288131X | Shifter Plate Ass'y (3 & 6) | 1 | — | Call for availability | |
| 3288132X | Shifter Plate Ass'y (4 & 5) | 1 or | — | Call for availability | ||
| 35 | 378004 | Flat Washer | 1 | $2.01 | Add to Cart | |
| 36 | 379110 | Indicator Switch (norm On) | 1 | $40.79 | Add to Cart | |
| 37 | 50036522 | Flat Washer | 1 | $1.05 | Add to Cart | |
| 38 | 50035610 | Lockwasher | 1 | $1.53 | Add to Cart | |
| 39 | 5004096 | Capscrew, Hex Head | 1 | $1.23 | Add to Cart | |
| 40 | 3784309 | Capscrew, Hex Head (.312-18 X .875) | 4 | $1.76 | Add to Cart |
Air Shift Control Assembly 438 Series Assembly 4 & 6
| Item | Part No. | Description | Qty | Notes | Price | |
|---|---|---|---|---|---|---|
| 3290421X | Air Shift Cover Assembly (3 & 6) | 1 or | $337.38 | Add to Cart | ||
| 3290422X | Air Shift Cover Assembly (4 & 5) | 1 | — | Call for availability | ||
| 45 | 11P112 | Shaft, Shifter | 1 | $51.93 | Add to Cart | |
| 46 | 28P207 | Oil Seal | 1 | $19.83 | Add to Cart | |
| 47 | 28P256 | Block Vee Ring | 2 | $5.03 | Add to Cart | |
| 48 | 32P166 | Shifter Fork E-z Shift™ | 1 | $106.87 | Add to Cart | |
| 3291681X | E-z Shift Cover Assembly (3 & 6) | 1 | — | Call for availability | ||
| 3291682X | E-z Shift Cover Assembly (4 & 5) | 1 | — | Call for availability | ||
| 49 | 34P76 | Shifter Cover | 1 | — | Call for availability | |
| 50 | 35P14 | Gasket | 2 | $2.88 | Add to Cart | |
| 51 | 37P25 | Shifter Spring | 1 | $11.57 | Add to Cart | |
| 54 | 65P14 | Cylinder Cap | 1 | $120.90 | Add to Cart | |
| 55 | 66P4 | Piston Floating | 1 | $9.22 | Add to Cart | |
| 56 | 3784474 | Capscrew, Allen Head | 3 | $1.78 | Add to Cart | |
| 57 | 378462 | Washer, Spring Retainer | 1 | $1.61 | Add to Cart | |
| 58 | 65P23 | Shifter Shaft Cover | 1 | $20.58 | Add to Cart | |
| 59 | 378908 | Capscrew, Button Head | 1 | — | No longer available — call for replacement | |
| 60 | 370110 | Indicator Switch (norm On) | 1 | — | Call for availability | |
| 61 | 379231 | Pipe Plug .125-27 Nptf Th 'd | 1 | $1.50 | Add to Cart | |
| 62 | 5008973 | Shipping Plug | 1 | — | No longer available — call for replacement | |
| 63 | 3784304 | Capscrew, Hex Head (.312-18 X .500) | 2 | $6.00 | Add to Cart |
This is the complete factory parts breakdown for the Chelsea PTO 438 — every part in the manual, matched to our live inventory. We stock 75 of the 91 parts above; click any part number to view it, or add it straight to your cart. Click a number on any diagram to jump to that part.
No parts match that search — try the part number with no dashes.
This Chelsea Illustrated Parts List covering the 438 PTO helps you identify the correct gear sets, shifter kits and service parts for your power take-off before you order.
| Models covered | 438 |
| PTO type | Chelsea 400 Series |
| Document | Illustrated Parts List (Chelsea) |
| Length | 12 pages |
| Format | PDF — free download |
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
Chelsea parts & units we stock
Pro Gear and Transmission stocks new, remanufactured and good-used parts for Chelsea PTO units:
Not sure exactly which unit you have? Check our identification guides, or Ask an Expert — send us photos of your data tag and our drivetrain specialists will identify the unit and the exact parts you need. Or call (877) 776-4600.
Browse all Chelsea PTO parts — rebuild kits, seal kits, gears & shift covers — or shop complete Chelsea PTO units.