Minneapolis-Moline 445
Verified
The Minneapolis-Moline 445 (1956–1959) was a mid-size utility/row-crop tractor — the larger companion to the 335 — built in Universal, Utility, Industrial, and even Military forms.
Identification & configuration
TractorData lists the 445 across Universal, Utility, and Industrial configurations; a Military 445 was also produced. See the model index.
Factory paint
Per the MMCI paint records, the 445 used Prairie Gold (PG2) with Cherry Red wheels — but the 1958 Military 445 was finished entirely in Olive Drab, a striking and verifiable exception. See the full paint reference.
What to verify
- Configuration: Universal/Utility/Industrial/Military; the Military version is Olive Drab.
- Serial / plate: on the transmission case; decode the serial (ranges below).
Sources & Verification Notes
Configuration per TractorData; paint (incl. the Olive Drab Military scheme) per the MMCI Paint Committee; serial ranges per Jensales as cited below. No horsepower or production-count figures are asserted beyond what the cited sources state.
Serial Number Ranges
| Year | Serial range | Number type | Source confidence |
|---|---|---|---|
| 1956 | 10100001 – 10102854 | tractor plate | Verified Medium |
| 1956 | 10200001 – 10201465 | tractor plate | Verified Medium |
| 1957 | 10102855 – 10104125 | tractor plate | Verified Medium |
| 1957 | 10201466 – 10202101 | tractor plate | Verified Medium |
| 1957 | 11100076 – 11100388 | tractor plate | Verified Medium |
| 1958 | 10104126 – 10104804 | tractor plate | Verified Medium |
| 1958 | 10202102 – 10202242 | tractor plate | Verified Medium |
| 1958 | 11100389 – 11100389 | tractor plate | Verified Medium |
| 1958 | 15300001 – 15300001 | tractor plate | Verified Medium |
| 1958 | 15700001 – 15700001 | tractor plate | Verified Medium |
| 1958 | 15200001 – 15200001 | tractor plate | Verified Medium |
| 1959 | 10104805 – 10104805 | tractor plate | Verified Medium |
| 1959 | 10202243 – 10202243 | tractor plate | Verified Medium |
| 1959 | 15400001 – 15400001 | tractor plate | Verified Medium |
Engine
- 3.4 L Four-Cylinder (Gas & Diesel) (≈206 ci / 3.4 L, Gasoline, diesel)
Specifications
| Nebraska Test | No. 578 (1956) |
|---|---|
| Fuel | Gasoline |
| Max Belt HP | 41.95 hp @ 1550 rpm (Test B) |
| Rated Belt HP | 37.95 hp @ 1550 rpm (Test D) |
| Max Drawbar HP | 38.48 hp @ 3464 lb pull (Test F, 2nd gear) |
| Rated Drawbar HP | 30.86 hp @ 2732 lb pull (Test H, 2nd gear) |
| Engine | Minneapolis-Moline, 4-cylinder vertical |
| Bore × Stroke | 3⅞" × 5" |
| Displacement | 206 cu in |
| Rated RPM | 1550 |
| Compression Ratio | 7.3 to 1 |
| Carburetor | Size 1" |
| Ignition | Battery, 12-volt |
| Total Weight as Tested | 7885 lb (with operator) |
| Advertised Speeds | 1st 2.78, 2nd 4.26, 3rd 6.48, 4th 10.05, 5th 15.40, reverse 4.26 mph (also Ampli-Torc ranges) |
| Tested fuel economy | 11.87 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 |
|---|---|---|---|---|
| 578 | Gasoline | 1956 | 38.48 hp | 41.95 hp (Belt) |
Sale Prices & Values
Documented sold prices: $1,850 – $1,850 (median $1,850, from 1 result)
| Date | Price | Condition | Auction |
|---|---|---|---|
| 2024-10-25 | $1,850 | — | Aumann Auctions, Inc. (Aumann Vintage Power) |
Public auction sold-price data points, for reference only — condition, originality, options, and locale drive Minneapolis-Moline values widely. This is not an appraisal.
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)
- Industrial / Highway Yellow (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
Service / Shop Manuals
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
Engine-family parts
This model uses the 3.4 L Four-Cylinder (Gas & Diesel), shared with ZB. Many engine-family components are common across these models — verify fitment against the parts catalog, as serial- and configuration-specific variations exist.
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
- 10A6373 — Cone bearing
Belt
- 10A22613 — Fan & alternator belt
Carburetor
- 10A11452 — Basic Carburetor Repair Kit
- TSX-633 — Marvel-Schebler carburetor (MM# 10A6464)
- TSX-713 — Marvel-Schebler carburetor (MM# 10A11452)
- TSX-714 — Marvel-Schebler carburetor (MM# 10A11451)
- TSX-797 — Marvel-Schebler carburetor
Clutch
- 10A20477 — 11" clutch, 13-spline, 1.75" dia. (Industrial)
- 10A18593 — 11" clutch, 13-spline, 1.75" dia., organic solid disc
- 10A18594 — 11" clutch, 13-spline, 1.75" dia., organic spring-dampened
- 10A20475 — 11" clutch, 13-spline, 4-pad ceramic + dampener spring
- 10P620 — 12" pressure plate assy, 3 levers
- 10P600 — 12" pressure plate assy, 3 levers (heavy duty)
- 10P232 — Pressure plate, 11", three levers, 9 springs
Decal
- 10D445 — Decal set
Electrical
- 10A25135 — 12-volt Cigarette Lighter Socket
Engine Bearing
- 11A5980 — Center/front main bearing, standard
- 11A6870 — Rear main bearing, standard
- 10A8420 — Rod bearing set, standard (206B-4 engine)
Gasket
- 10R291 — Carburetor Gasket Kit Minneapolis Moline KT 445 U Big Mo 400 Tractors Big Bowl
- 10A29269 — Fuel Sending Unit Gasket
- 10A6009 — Adapter-to-cylinder-head gasket
- 10A6398 — Distributor gasket
- 10A6020 — Front seal / oil gasket
- 10A5919 — Head gasket
- 10A5929 — Manifold gasket
- 10A2213 — Manifold-to-carb gasket
- 10A20853 — Manifold-to-head gasket
- 10A6015 — Oil supply pipe gasket / seal
- 10A21319 — Rear bearing housing gasket
- 10A6418 — Rear seal retainer gasket
- 10A9835 — Side-cover gasket, 206 OHV (veg-fiber)
- 10A9132 — Tach-drive gasket
- 10A6005 — Valve-cover / pan gasket
General
- 10A1051 — Brass Manifold Nut
- 10A12499 — Flywheel hub bushing (1.5" ID)
- 10A1052 — Manifold Nut
- 10A22845 — Radiator Drain Plug
- 10P754 — RE9044 Choke Butterfly Disc
Hose
O Ring
Oil Filter
- 10P732 — Oil filter (cartridge)
Piston
- 10B10542 — 0.040" OEM aluminum piston
- 60P36462360 — 3.625"+0.020 aluminum piston w/ pin, rings, retainers
- 60P36862360 — 3.625"+0.040" aluminum piston
- 60P38002363 — 3.8" bore 700-gram forged racing piston & HP pin
- 2-10R795 — Four sets of 0.040" over-rings for 10R792 piston
- 60R3686 — Ring set (3.625"+0.040")
- 60R3646 — Ring set for 60P36462360 piston
- 10R792 — Set of four pistons (+0.040) with pins & retainers
Piston Ring
- 60R3625-3336 — 3.625" bore ring set (3/32" comp + 3/16" oil)
- 10R793 — Piston Ring Set 4Cyl 3-5/8" Bore
Seal
- 10A2951 — Brake-plate & bull-pinion seal
- 10A5457 — Felt front seal
- 10A6828 — Felt front-hub seal
- 10A8468 — Front transmission seal
- 10A7814 — Hub & cross-shaft seal on lift arms
- 10A6958 — Rear-crankshaft seal
- 10A2755 — Torque-housing seal
Steering Wheel
- Steering wheel — Steering-wheel cap with ‘O’ ring — Steering-wheel cap with 'O' ring
Surviving Examples (collector-reported census)
Owner-submitted survivors, reviewed before publishing. Collector-reported — these corroborate, but do not establish, the documented serial ranges above.
- 5 known survivors
- Serials observed: 101–10,201,690
Service Bulletins
Factory dealer service bulletins — supplements, field conversions, and fixes for this model. See the full reference.
- C 125 335 & 445 Field Conversions bundles/parts
- C 133 335 & 445 Supplement S205 & S 221 3 Lube fittings
- C 137 335/445/5 Star Supplement, Gear Gang Attachment
- C 159 A 335/445/Jet*/4*4*Super, 5-Star, Installation of Reverse Shuttle
- C 104 445 Supplement to S 205
- C 122 445 Installing Selective Lift Equipment
- C 127 445 Install Tel-O-Flo Hyd. Lift
- C 128 445 In Spanish
- C 139 445 Supplement to S 205
- C 82 445 Pre-Delivery Check Sheet
- C 95 445 Field Changes/Installations of Oil Leak/
- C 99 445 Assembling Crated 445 universals
- D 300 445 Correction to S 205, rear wheel spacing
- D 301 445 Install marker attachment for C1200/1400
- D 315 445 Attaching RJ Huskor to 445 tractor
- D 318 445 Ampli-Torc adjustment opening, early models
- D 321 445 Depth Control Valve installation
- D 322 445 Adjusting Ampli-Torc & PTO Clutches
- D 323 445 Installing PTO & Belt Pulley
- D 324 445 Installing 15 GPM Hydraulic pump
- D 326 445 Attaching MO Mower
- D 328 445 Repositioning Headlights
- D 336B 445 Operating, adjusting & Servicing Tel-O-Flo Lifts
- D 339 445 Depth Limit Control Rods to install on tractors
- D 344 445 3-Point hitch assist spring assembly available
- D 345 445 Front End Weights
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
Minneapolis-Moline Prototype 445 Tractor #X231 Restoration - Part 1 Squatch253
Can We Save This Tractor??? Minneapolis-Moline Prototype #X231 Back-Story & Restoration Ef Squatch253Curated third-party videos — MinnieMo is not affiliated; links open on YouTube.
Owner Notes & Questions
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