Thieman WT 20EST / 30EST / 40EST Liftgate Parts Diagrams
Thieman WT 20EST / 30EST / 40EST liftgate parts lookup
Use this Thieman WT 20EST / 30EST / 40EST liftgate parts diagram page to identify OEM components, review part callouts, and verify replacement liftgate parts.
Compatibility and Purchasing Notice
Although the information on this page is taken from an OEM lift gate manual, if you're unsure whether this data matches your exact model and year, PLEASE contact our team. Part numbers can vary by year - even within the same model - and we're always happy to confirm the correct parts for you.
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INSPECTION AND LOCATION OF DECALS
| Item | Qty | Part Number | Description | Actions |
|---|---|---|---|---|
| 1 | 4671050 | Warning Decal-off center | ||
| 2 | 4650150 | Fast Idle Decal | ||
| 2 | 4650140 | PTO Decal | ||
| 3 | 4609 | Danger Decal-no riding | ||
| 4 | 4611 | Operating Decal | ||
| 4 | 4621 | Operating Decal-PTO | ||
| 5 | 4650100 | Capacity Decal-2000# | ||
| 5 | 4650120 | Capacity Decal-3000# | ||
| 5 | 4650130 | Capacity Decal-4000# | ||
| 6 | 4650800 | Thieman Nameplate | ||
| 7 | 4650530 | Urgent Warning Decal | ||
| 8 | 5705 | Reflector (3) | ||
| 9 | 4650770 | Caution Decal-Platform Area | ||
| 10 | 4612 | Wiring Decal-Gravity Down | ||
| 10 | 4618 | Wiring Decal-Power Down | ||
| 11 | 4620 | Warning Decal |
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.
Have your liftgate serial number ready for faster assistance. Where to find it
PLATFORM ASSEMBLY
| Item | Qty | Part Number | Description | Actions |
|---|---|---|---|---|
| 1 | 1 / 1 / 1 | 3400470 | Platform 8436 | |
| 1 | 1 / 1 / 1 | 3400480 | Platform 9036 | |
| 1 | 1 / 1 | 3400490 | Platform 9042 | |
| 1 | 1 / 1 | 3400500 | Platform 9048 | |
| 2 | 1 / 1 / 1 | 2019060 | Spacer Angle | |
| 3 | 2 / 2 / 2 | 31606 | Chain and Hook | |
| 4 | 2 / 2 / 2 | 3103730 | Chain Anchor | |
| 5 | 2 / 2 / 2 | 8120376 | Nut .31 | |
| 6 | 2 / 2 / 2 | 2019033 | Mounting Angle | |
| 7 | 2 / 2 / 2 | 5702290 | Snubber | |
| 8 | 2 / 2 / 2 | 8120214 | Lockwasher .31 | |
| 9 | 2 / 2 / 2 | 5792010 | Screw .31 x 2.25 | |
| 10 | 2 | 5101120 | Spring | |
| 11 | 2 | 5001380 | Spring Anchor | |
| 12 | 2 | 5001390 | Pin | |
| 13 | 4 | 5781008 | Retaining Ring | |
| 14 | 4 | 8120377 | Nut .38 | |
| 15 | 4 | 8120388 | Flatwasher .38 | |
| *16 | 2 / 2 / 2 | 3012-002 | Tube | |
| *17 | 4 / 4 / 4 | 8180022 | Screw .25 x 1 | |
| *18 | 2 / 2 / 2 | 27011 | Resting Plate | |
| *19 | 2 / 2 / 2 | 5703 | Pad | |
| *20 | 2 / 2 / 2 | 3189 | Latch Bar Weldment | |
| *21 | 4 / 4 / 4 | 8120386 | Flatwash .25 | |
| *22 | 4 / 4 / 4 | 8103-019 | Locknut .25 |
TRUNNION, LIFT ARMS, AND IDLER ARMS
| Item | Qty | Part Number | Description | Actions |
|---|---|---|---|---|
| 1 | 1 | 3102191 | Trunnion Asm | |
| 1 | 1 | 3109940 | Trunnion Asm | |
| 2 | 1 / 1 | 3109950 | Lift Arm | |
| 3 | 2 / 2 | 31441 | Idler Arm | |
| 4 | 2 / 2 | 3100540 | Idler Arm Pivot | |
| 5 | 6 / 6 | 5501010 | Bushing | |
| 6 | 10 / 10 | 8271291 | Grease Fitting | |
| 7 | 20 / 20 | 5781008 | Retaining Ring | |
| 8 | 2 / 2 | 5001351 | Pin Asm | |
| 9 | 4 / 4 | 5001841 | Pin Asm | |
| 10 | 2 / 2 | 5792003 | Screw .62 x 2.25 | |
| 11 | 2 / 2 | 8121574 | Lockwasher .62 | |
| 12 | 2 / 2 | 8124847 | Nut .62 | |
| 13 | 2 / 2 | 5001371 | Pin Asm | |
| 14 | 2 / 2 | 5001401 | Pin Asm | |
| 15 | 2 / 2 | 8426897 | Nut .75 | |
| 16 | 2 / 2 | 8271771 | Screw .75 x 2 |
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.
Have your liftgate serial number ready for faster assistance. Where to find it
PUMP ASSEMBLY-GRAVITY DOWN, MANUAL CLOSE
| Item | Qty | Part Number | Description | Actions |
|---|---|---|---|---|
| 1 | 1 | 4400351 | Pump Asm | |
| 2 | 1 | 4421420 | Pump Bracket | |
| 3 | 1 | 4421350 | Mounting Bracket | |
| 4 | 1 | 4423520 | Motor 8111 | |
| 5 | 5 | 8180126 | Screw .38 x 1.50 | |
| 6 | 5 | 8120377 | Nut .38 | |
| 7 | 4 | 8120388 | Flatwasher .38 | |
| 8 | 10 | 8106-010 | Internal Tooth Lockwasher .38 | |
| 9 | 1 | 5700100 | Strap | |
| 10 | 1 | 5704 | Cover | |
| 11 | 1 | 4938-001 | Swivel Elbow MAORB-FJS 45° | |
| 12 | 2 | 8111-005 | Screw #10 x .75 | |
| 13 | 1 | 4420410 | Breather Cap | |
| 14 | 1 | 4953-001 | Tee MJ-MJ-MJ | |
| 15 | 1 | 4468 | Solenoid | |
| 16 | 4 | 5001841 | Pin Asm | |
| 17 | 8 | 5781008 | Retaining Ring | |
| 18 | 4 | 8271291 | Zerk | |
| 19 | 1 | 31446 | Toggle Switch Asm | |
| 20 | 2 | 4294 | Cylinder 3 x 8 WT20, 30 | |
| 21 | 1 | 4318-001 | Battery Cable #2x2’ | |
| 22 | 2 | 4931-001 | Restrictor Elbow MJ-MAORB | |
| 23 | 2 | 4951-004 | Hose 48.00 | |
| 24 | 1 | 4300030 | Battery Cable #2 x 25’ | |
| 25 | 1 | 4350 | Cable Lug | |
| 26 | 1 | 4318-002 | Ground Cable #2 x 2' | |
| 27 | 12 | 5701260 | Cable Retainer | |
| 28 | 2 | 4933-001 | Elbow BT-MAORB | |
| 29 | 1 | 8104-006 | Screw .31 x 1 | |
| 30 | 1 | 4319-002 | Heat Shrink | |
| 31 | 1 | 4301770 | Circuit Breaker-150AMP | |
| 32 | 1 | 4422850 | Push Button Control | |
| 33 | 2 | 4921-003 | Tubing | |
| 34 | 2 | 4934-001 | Tee BT-BT-MAORB |
PUMP ASSEMBLY-POWER DOWN, POWER CLOSE
| Item | Qty | Part Number | Description | Actions |
|---|---|---|---|---|
| 1 | 1 | 4411 | Pump Asm | |
| 2 | 1 | 4421420 | Pump Bracket | |
| 3 | 2 | 4301740 | Toggle Switch | |
| 4 | 1 | 4423520 | Motor 8111 | |
| 5 | 5 | 8180126 | Screw .38 x 1.50 | |
| 6 | 5 | 8120377 | Nut .38 | |
| 7 | 4 | 8120388 | Flatwasher .38 | |
| 8 | 10 | 8106-010 | Internal Tooth Lockwasher .38 | |
| 9 | 1 | 5700100 | Strap | |
| 10 | 1 | 5704 | Cover | |
| 11 | 1 | 31127 | Valve Cover | |
| 12 | 2 | 8109-010 | Screw .25 x 3 | |
| 13 | 1 | 4420409 | Breather Cap | |
| 14 | 2 | 4935 | “F” Fitting | |
| 15 | 1 | 4468 | Solenoid | |
| 16 | 8 | 5001841 | Pin Asm | |
| 17 | 16 | 5781008 | Retaining Ring | |
| 18 | 8 | 8271291 | Zerk | |
| 19 | 2 | 4297 | Closing Cylinder | |
| 20 | 2 | 4294 | Lift Cylinder 3x8 WT20, 30 | |
| 20 | 2 | 4296 | Lift Cylinder 3.5x8 WT40 | |
| 21 | 1 | 4318-001 | Battery Cable #2x2’ | |
| 22 | 2 | 4955-001 | Restrictor Elbow MJ-FJ | |
| 23 | 2 | 4951-015 | Hose 51.00 | |
| 24 | 2 | 4951-005 | Hose 60.00 | |
| 25 | 2 | 4951-004 | Hose 48.00 | |
| 26 | 2 | 4951-006 | Hose 34.00 | |
| 27 | 12 | 5701260 | Cable Retainer | |
| 28 | 1 | 4300030 | Battery Cable #2 x 25’ | |
| 29 | 1 | 4350 | Cable Lug | |
| 30 | 2 | 4301750 | Toggle Seal | |
| 31 | 6 | 4930-001 | Elbow MJ-MAORB | |
| 32 | 1 | 4319-002 | Heat Shrink | |
| 33 | 1 | 4301770 | Circuit Breaker 150 AMP | |
| 34 | 2 | 4931-001 | Restrictor Elbow MJ-MAORB | |
| 35 | 2 | 4932-001 | Tee MJ-MJ-MAORB | |
| 36 | 1 | 4318-002 | Ground Cable #2 x 2 | |
| 37 | 1 | 8104-006 | Screw .31 x 1 |
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.
Have your liftgate serial number ready for faster assistance. Where to find it
PTO PUMP ASSEMBLY-POWER DOWN, MANUAL CLOSE
| Item | Qty | Part Number | Description | Actions |
|---|---|---|---|---|
| 1 | 1 | 4800010 | PTO Pump | |
| 2 | 6 | 4930-001 | Elbow MJ-MAORB | |
| 3 | 4 | 2010070 | Angle | |
| 4 | 4 | 5001841 | Pin Asm | |
| 5 | 4 | 8180126 | Screw .38 x 1.50 | |
| 6 | 4 | 8120388 | Flatwasher .38 | |
| 7 | 4 | 8120382 | Lockwasher .38 | |
| 8 | 4 | 8120377 | Nut .38 | |
| 9 | 1 | 4946 | Valve | |
| 10 | 2 | 4935 | “F” Fitting | |
| 11 | 1 | 2797-001 | Valve Bracket | |
| 12 | 3 | 8180091 | Screw .31 x 2.50 | |
| 13 | 3 | 8120214 | Lockwasher .31 | |
| 14 | 3 | 8120376 | Nut .31 | |
| 15 | 2 | 4950-001 | Hose 240.00 | |
| 16 | 3 | 4951-013 | Hose 84.00 | |
| 17 | 1 | 4951-008 | Hose 108.00 | |
| 18 | 4 | 8271291 | Zerk | |
| 19 | 2 | 4931-001 | Restrictor Elbow MJ-MAORB | |
| 20 | 8 | 5781008 | Retaining Ring | |
| 21 | 2 | 4294 | Cylinder 3 x 8 WT20,30 | |
| 21 | 2 | 4296 | Cylinder 3.5 x 8 WT40 |
PTO PUMP ASSEMBLY-POWER DOWN, POWER CLOSE
| Item | Qty | Part Number | Description | Actions |
|---|---|---|---|---|
| 1 | 1 | 4800010 | PTO Pump | |
| 2 | 10 | 4930-001 | Elbow MJ-MAORB | |
| 3 | 4 | 2010070 | Angle | |
| 4 | 8 | 5001841 | Pin Asm | |
| 5 | 4 | 8180126 | Screw .38 x 1.50 | |
| 6 | 4 | 8120388 | Flatwasher .38 | |
| 7 | 4 | 8120382 | Lockwasher .38 | |
| 8 | 4 | 8120377 | Nut .38 | |
| 9 | 1 | 4946 | Valve | |
| 10 | 1 | 4947 | Valve | |
| 11 | 1 | 4944-001 | Straight Adapter MAORB-MAORB | |
| 12 | 4 | 4935 | “F” Fitting | |
| 13 | 2 | 4297 | Closing Cylinder 3 x 6 | |
| 14 | 1 | 2797-002 | Valve Bracket | |
| 15 | 3 | 8180091 | Screw .31 x 2.50 | |
| 16 | 3 | 8120214 | Lockwasher .31 | |
| 17 | 3 | 8120376 | Nut .31 | |
| 18 | 2 | 4950-001 | Hose 240.00 | |
| 19 | 1 | 4951-014 | Hose 168.00 | |
| 20 | 1 | 4951-016 | Hose 63.00 | |
| 21 | 4 | 4951-013 | Hose 84.00 | |
| 22 | 8 | 8271291 | Zerk | |
| 23 | 16 | 5781008 | Retaining Ring | |
| 24 | 2 | 4931-001 | Restrictor Elbow MJ-MAORB | |
| 25 | 2 | 4951-008 | Hose-108.00 | |
| 26 | 2 | 4294 | Cylinder 3 x 8 WT20, 30 | |
| 26 | 2 | 4296 | Cylinder 3.5 x 8 WT40 |
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Contact SupportImportant Diagram Notice
These diagrams are for reference only.
- Due to unintended occasional data alignment issues, a page table may differ slightly from the original OEM PDF.
- Please verify details against the original PDF file.
- Contact our team anytime for part number confirmation.
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