PRODUCT DETAILS
Thieman power unit for model TT-12. This is part number 4400421. We have tagged this as a Thieman power unit.
| Item | Part Number | Description | Qty./Model |
| 1 | 4423520 | Motor 8111 | 1 |
| 2 | 4400429 | Pump and Reservoir Only | 1 |
| 3 | 4420410 | Breather Cap | 1 |
| 4 | 4422330 | Reservoir ø4.50 x 11 | 1 |
| 5 | 4421520 | Bearing | 1 |
| 6 | 4421530 | Seal | 1 |
| 7 | 4421350 | Bracket | 1 |
| 8 | 4421600 | O-Ring | 1 |
| 9 | 4421370 | Cable | 1 |
| 10 | 4423410 | Plunger | 1 |
| 11 | 4423220 | Eye Bolt | 1 |
| 12 | 4420970 | Screw | 3 |
| 13 | 4423450 | Bracket | 1 |
| 14 | 4420750 | Dimmer Switch-Current | 1 |
| 14 | 4422980 | Canister Switch-Obsolete | 1 |
| 15 | 5793010 | Self Tap Screw .25 x .75 | 2 |
| 16 | 8109-012 | Screw .25 x 1.50 | 2 |
| 17 | 4324 | Buss Bar | 1 |
| 18 | 8219666 | Pipe Nipple .75 x 6 | 1 |
| 19 | 8192090 | Pipe Coupling .75 | 1 |
| 20 | 8144113 | Street Elbow .75 | 1 |
| 21 | 4421660 | Self Tap Screw #10 x .38 | 6 |
NEED ASSISTANCE?
Have your liftgate serial number ready for faster assistance. Where to find it
MODELS USING THIS PART
Note
This part appears in the following parts manuals. Always verify compatibility with your specific liftgate model and serial number before ordering.
Find your model and serial numberFound in
Model groupings are not available for this part yet. Contact our team for fitment help.
SHIPPING AND RETURNS
Shipping Information
Shipping timelines, transit options, and exceptions can vary by part and location. Please review our official policy page for the most current shipping and return details.
View Shipping PolicyReturn Policy
Return eligibility, time windows, and any applicable fees are outlined on our policy page. Policy terms may be updated there, so please refer to that page before placing your order.
View Return Policy
OEM Parts Diagram References
Find this Thieman Liftgate part in original OEM diagrams. Each link opens directly to the matching section in a new tab.
Reference Notice: Manual links are provided for reference only. If you have any doubt, contact us — we’re happy to verify parts and help you purchase with confidence.
No active OEM diagram references are currently available for this item.
- Gallery
- Description
Thieman power unit for model TT-12. This is part number 4400421. We have tagged this as a Thieman power unit.
| Item | Part Number | Description | Qty./Model |
| 1 | 4423520 | Motor 8111 | 1 |
| 2 | 4400429 | Pump and Reservoir Only | 1 |
| 3 | 4420410 | Breather Cap | 1 |
| 4 | 4422330 | Reservoir ø4.50 x 11 | 1 |
| 5 | 4421520 | Bearing | 1 |
| 6 | 4421530 | Seal | 1 |
| 7 | 4421350 | Bracket | 1 |
| 8 | 4421600 | O-Ring | 1 |
| 9 | 4421370 | Cable | 1 |
| 10 | 4423410 | Plunger | 1 |
| 11 | 4423220 | Eye Bolt | 1 |
| 12 | 4420970 | Screw | 3 |
| 13 | 4423450 | Bracket | 1 |
| 14 | 4420750 | Dimmer Switch-Current | 1 |
| 14 | 4422980 | Canister Switch-Obsolete | 1 |
| 15 | 5793010 | Self Tap Screw .25 x .75 | 2 |
| 16 | 8109-012 | Screw .25 x 1.50 | 2 |
| 17 | 4324 | Buss Bar | 1 |
| 18 | 8219666 | Pipe Nipple .75 x 6 | 1 |
| 19 | 8192090 | Pipe Coupling .75 | 1 |
| 20 | 8144113 | Street Elbow .75 | 1 |
| 21 | 4421660 | Self Tap Screw #10 x .38 | 6 |