397931R2
Throttle lever knob (rubber) for International Harvester 454, 544, 656, 666 and 24 more
Original part (OEM)
Not checked yet
PorkForge replacement
Not made yet
Part facts
- Original part number
- 397931R2R1
- Manufacturer
- International Harvester (Farmall)
- Part type
- Knobs · Control knobs and handles
- System
- Operator controls
- Material
- rubberR1
- Notes
- Rubber knob for the hand throttle (governor) lever on the 56 and 66 series, the 1026, the Hydro 70, 86 and 100, and some 454 and 544 tractors. On the 454 the same knob is also listed for the forward/reverser and hydraulic remote levers. Precision Tractor Parts sells a reproduction for $9. The listed part is rubber, so a faithful copy needs a flexible material such as TPU, which is outside Slant 3D's PLA and PETG range.
- Last reviewed
- Oct 27, 2026 · record pf-ih-0009
Dimensions How to measure this part
Fits these machines
| Model | Years | Notes | Evidence |
|---|---|---|---|
| International Harvester 454 | Not recorded | Seller: some 454s; also listed as the forward/reverser and hydraulic remote knob on the 454. | Reported 1 |
| International Harvester 544 | Not recorded | Seller: some 544s. | Reported 1 |
| International Harvester 656 | Not recorded | — | Reported 1 |
| International Harvester 666 | Not recorded | — | Reported 1 |
| International Harvester 674 | Not recorded | — | Reported 1 |
| International Harvester 686 | Not recorded | — | Reported 1 |
| International Harvester 756 | Not recorded | — | Reported 1 |
| International Harvester 766 | Not recorded | — | Reported 1 |
| International Harvester 826 | Not recorded | — | Reported 1 |
| International Harvester 856 | Not recorded | — | Reported 1 |
| International Harvester 966 | Not recorded | — | Reported 1 |
| International Harvester 1026 | Not recorded | — | Reported 1 |
| International Harvester 1066 | Not recorded | — | Reported 1 |
| International Harvester 1256 | Not recorded | — | Reported 1 |
| International Harvester 1456 | Not recorded | — | Reported 1 |
| International Harvester 1466 | Not recorded | — | Reported 1 |
| International Harvester 1468 | Not recorded | — | Reported 1 |
| International Harvester 1566 | Not recorded | — | Reported 1 |
| International Harvester 1568 | Not recorded | — | Reported 1 |
| International Harvester 2544 | Not recorded | — | Reported 1 |
| International Harvester 2656 | Not recorded | — | Reported 1 |
| International Harvester 2756 | Not recorded | — | Reported 1 |
| International Harvester 2826 | Not recorded | — | Reported 1 |
| International Harvester 2400 | Not recorded | — | Reported 1 |
| International Harvester 2500 | Not recorded | — | Reported 1 |
| International Harvester Hydro 70 | Not recorded | — | Reported 1 |
| International Harvester Hydro 86 | Not recorded | — | Reported 1 |
| International Harvester Hydro 100 | Not recorded | — | Reported 1 |
Where to find one today
| Source | Condition | Price | Stock | Checked |
|---|---|---|---|---|
| Precision Tractor Parts 1 | Reproduction | $9.00 | Not stated | Oct 27, 2026 |
Why it is hard to get
- Market evidence: Offered as a reproduction across the 56, 66 and Hydro series; no NLA flag seen on the page read. 1
Can this part be made again?
EligiblePhysical replacement
Hand knob on the throttle lever; not structural. Flexible original means TPU from another fabricator, or a rigid PETG version as a lower-fidelity option.
Candidate materials: TPU (other fabricator), PETG (rigid alternative) (confirmed by test-fitting).
EligibleSTL / FreeCAD file
Can be offered as a printable file and an editable FreeCAD model once the measurements are verified.
Sources
Not affiliated with or endorsed by International Harvester or its successors. The name is used only to identify compatibility. Part numbers are shown for reference. Check fit against your own machine. Spot a mistake?
Verification checklist (2 of 8 met)
- ✕ OEM part number not yet verified from an OEM or dealer source
- ✕ Cited by one website only, and not an OEM or dealer source
- ✓ At least one compatible model with a source
- ✕ 2 kinds of fact beyond the name (material, aftermarket prices); 3 needed
- ✕ Original availability not yet checked
- ✓ Text and title are distinct
- ✕ On hold: Cites precisiontractorparts.com, whose robots.txt now blocks AI crawlers; re-source or verify by hand
- ✕ Not yet reviewed and signed off for search
Related parts
| Part no. | Part | Make | Fits | Original | PorkForge | Sources |
|---|---|---|---|---|---|---|
| 21367D | Rotary light switch knob, new style | International Harvester | Cub, Cub Lo-Boy, 154, 184, 185 +53 more | Not checked | Research only | 2 |
| 382805R1 | Hydraulic sensitivity control knob | International Harvester | 544, 656, 666, 686, 706 +18 more | Not checked | Research only | 1 |
| 389168R1 | Hydraulic remote control handle knob | International Harvester | 706, 756, 806, 826, 856 +11 more | Not checked | Research only | 1 |
| 397978R2 | Gear shift and torque amplifier lever knob | International Harvester | 756, 766, 826, 856, 966 +17 more | Not checked | Research only | 2 |
| 96893C1 | Control knob (function not stated by source) | International Harvester | 1066, 1086, 1466, 1486, 1566 +22 more | Back-ordered | Research only | 1 |
| 2752916R1 | Torque amplifier knob insert | International Harvester | 544, 656, 664, 666, 686 +2 more | Not checked | Research only | 1 |
| 382682R1 | Hand throttle handle with plug | International Harvester | 656, 706, 806, 1206, 21206 +6 more | Not checked | Research only | 1 |
| 3121549R1 | Gear shift lever knob (ball) | International Harvester | Cub, Cub Lo-Boy, A, AV, B +56 more | Not checked | Research only | 3 |