Minneapolis-Moline GB
Verified
The Minneapolis-Moline GB (1955–1959) was a four-cylinder G standard tractor — the last of the four-cylinder G line before the six-cylinder big-G era.
Identification & configuration
The GB closed out the four-cylinder G family (GT → GTA → GTB → GTC → GB); see the four-cylinder G overview. Don’t confuse it with the later six-cylinder big-G tractors.
Factory paint
Per the MMCI paint records, the GB wore the common Prairie Gold (PG2) with Cherry Red wheels. See the full paint reference.
What to verify
- Identity: confirm it’s a four-cylinder GB, not a six-cylinder big-G; decode the serial (ranges below).
- Configuration: verify the standard-tread configuration and fuel system.
Sources & Verification Notes
Years per TractorData; paint per MMCI; serial ranges per Jensales as cited below. We do not assert horsepower figures, and we flag production counts as collector-reported until confirmed against factory literature.
Serial Number Ranges
| Year | Serial range | Number type | Source confidence |
|---|---|---|---|
| 1955 | 8900001 – 8901500 | tractor plate | Verified Medium |
| 1955 | 9000001 – 9000850 | tractor plate | Verified Medium |
| 1955 | 09000001 – 09000850 | tractor plate | Verified High |
| 1956 | 8901501 – 8902601 | tractor plate | Verified Medium |
| 1956 | 9000851 – 9001525 | tractor plate | Verified Medium |
| 1956 | 09000851 – 09001525 | tractor plate | Verified High |
| 1957 | 8902602 – 8903401 | tractor plate | Verified Medium |
| 1957 | 9001526 – 9002145 | tractor plate | Verified Medium |
| 1957 | 09001526 – 09002145 | tractor plate | Verified High |
| 1958 | 8903402 – 8904251 | tractor plate | Verified Medium |
| 1958 | 9002146 – 9002655 | tractor plate | Verified Medium |
| 1958 | 09002146 – 09002655 | tractor plate | Verified High |
| 1959 | 8904252 – 8904252 | tractor plate | Verified Medium |
| 1959 | 9002656 – 9002656 | tractor plate | Verified Medium |
| 1959 | 09002656 – 09002790 | tractor plate | Verified High |
Engine
- 6.6 L Four-Cylinder (Gas / LP) (6.6 L, Gasoline, LP-gas)
Specifications
| Nebraska Test | No. 547 (1955) |
|---|---|
| Fuel | Gasoline |
| Max Belt HP | 65.64 hp @ 1300 rpm (Test B) |
| Rated Belt HP | 58.51 hp @ 1301 rpm (Test D) |
| Max Drawbar HP | 59.12 hp @ 5229 lb pull (Test F, 3rd gear) |
| Rated Drawbar HP | 46.26 hp @ 4046 lb pull (Test H, 3rd gear) |
| Engine | Minneapolis-Moline, 4-cylinder vertical |
| Bore × Stroke | 4⅛" × 6" |
| Displacement | 403.2 cu in |
| Rated RPM | 1300 |
| Compression Ratio | 5.74 to 1 |
| Carburetor | Size 1¼" |
| Ignition | Battery, 12-volt |
| Total Weight as Tested | 11,845 lb (with operator) |
| Advertised Speeds | 1st 2.7, 2nd 3.8, 3rd 4.4, 4th 6.3, 5th 14.7, reverse 2.1 mph |
| Tested fuel economy | 11.42 hp·hr/gal |
Specifications per the cited source below. Manufacturer-advertised figures can differ from tested values — confirm restoration-critical specs against factory literature.
Nebraska Tractor Test Results
Official, independently measured performance from the University of Nebraska Tractor Test Laboratory (public-domain reports). Figures are as-tested on a specific fuel/transmission variant — your tractor may differ. Look up the full report by test number.
| Test No. | Fuel | Year | Drawbar hp (max) | PTO/Belt hp |
|---|---|---|---|---|
| 545 | LP gas | 1955 | 62.14 hp | 70.55 hp (Belt) |
| 547 | Gasoline | 1955 | 46.26 hp | 65.64 hp (Belt) |
| 568 | Diesel | 1955 | 63.70 hp | 62.78 hp (Belt) |
Factory Paint Colors
Body, wheel, and powertrain colors documented for this model's era by the MMCI Paint Committee. The exact part-by-part configuration, year breaks, and footnotes are in the full paint reference. Individual tractors vary — special orders and regional exceptions were common, so confirm against your own machine.
- Prairie Gold (body)
- Cherry Red (wheels / trim)
Manuals & Literature
Factory publications cataloged for this model (MMCI / Floyd County Museum). We catalog the publication and its coverage — not its contents. Obtain copies from the museum or a reproduction seller.
Operator's Manuals
Parts Catalogs
Finding Parts
We don't publish part numbers we can't verify against factory literature. The authority for this model's part numbers is its factory parts catalog; interchange is serial- and configuration-dependent, so always confirm against the parts book before buying.
Factory parts catalogs
Documented parts
Cataloged Minneapolis-Moline part numbers documented for this model. Applications vary by serial, year, and configuration — confirm against your parts book before ordering.
Bearing
- 10A10902 — Outer Wheel Bearing Cup Minneapolis Moline G705 G900 GB GBD UTS
Carburetor
- 10A15157 — Carburetor Float Minneapolis Moline GB M5 U 5 Star Tractors Marvel Schebler
- 10A12283 — Economy Carburetor Kit Minneapolis Moline GB U 5 Star Tractor Marvel Schebler
- TSX-625 — Marvel-Schebler carburetor (MM# 10A6268)
Clutch
- 10A4756 — Clutch drive gear ring for dual-disc clutch
- FT5807 — Complete clutch assy
- 10A4757 — Complete clutch assy (Twin Disc Model B dual disc)
- 10P527 — Spring for clutch friction disc plate
Electrical
- 10A15098 — Fuse Holder
Gasket
- 10R909 — Engine overhaul gasket set (D425-6)
- 10A8617 — Manifold-to-carb gasket (2-11/16" centers)
- 10R250 — Valve-grind overhaul gasket set (403A-4 / 403C-4)
General
- 0W352 — , 15P12 Plastic Screen
- 10A20734 — 12-volt External Voltage Regulator Minneapolis Moline Tractor GB GTB GVI
- 10P756 — Choke Fuel Shut Off Cable Clip M Schebler Minneapolis Moline BF GB M5 R
- 10A3809 — Sediment Bowl Assembly
Hose
Oil Filter
- 10A14373 — Oil filter (spin-on)
Surviving Examples (collector-reported census)
Owner-submitted survivors, reviewed before publishing. Collector-reported — these corroborate, but do not establish, the documented serial ranges above.
- 8 known survivors
- Serials observed: 1,605,712–8,904,402
Service Bulletins
Factory dealer service bulletins — supplements, field conversions, and fixes for this model. See the full reference.
- C 37 GB Supplement to S 152. Specs
- C 38 GB Supplement to S 714, Specs, Diesel
- C 48 GB Pre-Delivery Check Sheet
Sources & Verification Notes
Status: Verified
Primary source: TractorData — Minneapolis-Moline model listings tier 4
Last checked: 2026-06-01
Where this model fits in the Minneapolis-Moline history & timeline →
Videos
Curated third-party videos — MinnieMo is not affiliated; links open on YouTube.
Owner Notes & Questions
Own one, restored one, or have a question about this model? Share it below. Notes are moderated before they appear, and owner-reported details are not treated as verified facts until cited.
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