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International 15-30 Gear Drive

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International 15-30 Gear Drive 1922
International 15-30 Gear Drive 1922
Model history
Model introduced 1921
Model discontinued 1922
Model status Discontinued Discontinued
No. produced 1,549
Preceded by International 15-30 (chain-drive)
Superseded by McCormick-Deering 15-30
Engine Specification
Engine make International
Fuel type gasoline
Power hp 32.86 belt, 15.35 drawbar with 34.9 belt, 26.7 drawbar maximum (1922 test)
Governed rpm 1,000
Displacement cu in /(litre) 382 ci
No. of Cylinders 4
Bore in (mm) 114.30 (4.5 in)
Stroke in (mm) 152.40 (6 in)
Cooling system Water
Transmission Details
Transmission type Sliding gear
Clutch 'Spider' multi-plate type
Gearbox make International
Forward 3
Reverse 1
Drive 2-WD
General Data
Fuel capacity: 18.5 gal (70.0 L)
Linkage Category Unknown
Tyre Sizes (std/options)
Front Steel 34" (diameter) x 6" (face), 52" (tread)
Rear Steel 50" (diameter) x 12" (face), 53" (tread)
Tractor Dimensions
Length (inches/metres) 137 in
Width (inches/meters) 65 in
Height (inches/meters) (steering wheel) 70 in, (radiator) 64 in
Weight (nominal) lb/kg 5400 lb
Turning circle (nominal) inches/meters 16 1/2 ft
Wheelbase 85 in
Other info
Factories Milwaukee Works, Milwaukee, Wisconsin, USA
Plow rating 3
Nebraska Tests No. 87
Approximate Cost new in (year) $1250 (approx.)
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The International 15-30 Gear Drive was built by International Harvester from 1921 to 1922 in the Milwaukee Works factory, WI, USA.

Model History Edit

For Company history see
Main article: International Harvester

The new 15-30 was a revolutionary tractor for International, with automotive styling, unit-mainframe construction, a smooth ohv 4-cylinder engine with a guaranteed-for-life ball-bearing crankshaft, gear drive (instead of the chain drive of the previous 15-30), and an optional power take-off. It was rated to pull a 3-bottom plow. Production was just getting started in 1921 and only 199 tractors were built that year, followed by 1,350 in 1922. In 1923 the tractor was renamed the McCormick-Deering 15-30.

Timeline Edit

Modification TimelineEdit

  • 1921-22: These early models had early front wheel hubs which were small and star-shaped (like previous IHC models) and back wheels which clamped onto the axle spline shafts with angle lugs/blades. 1921 models had star-shaped rear hubs that were changed to circle-shaped in 1922. They also had short fenders/mudguards on both sides. The petrol tank was located inside the kerosene tank and was divided inside with two tank caps on the top. The tank caps were slightly star-shaped and taller than thae later models aswell. They used a multi-plate 3 spring clutch. An early manifold design was used with an Ensign model "JTW" 1 1/2" carburettor that had the choke butterfly between the carb and air-cleaner instead of inside the carb itself;- the exhaust elbow came out of the left side (from the driving position) lower small engine side-panel/curtain in the bottom-right corner just before the side-panel/curtain corner. Short side-panels/curtains were fitted with short louver vents and short bolted on side-panels/curtains (the exhaust elbow stuck out of the left one). They had a more rounded govenor housing than the later models. A tin work panel with D-beading was used on the top right side of the engine for access to the push rods. A 'pot like' water-bath air cleaner was fitted (the first variation air cleaner). They were thought to have a Dixie magneto with a splitdorf impulse (of the manually engaged latch type) for the first few years. These early models had different transmission and gearbox unit designs than the later models (they were being chang every few years, or even annually), the gearstick included a round spherical ball-joint where the stick sat into the platform; with a gromit ("boot", which was probably leather) to cover it aswell as a spherical knob on the top. The first break design was similar to the later ones but didn't have a flat row of teeth cast onto the break-band bracket for the lever, instead it was an ark of teeth bolted onto this bracket. The break lever included a little "handle" lever at the top with a linkage going to the pawl on these early models. It seems that at least the 1921 models had a different water-inlet pipe design than the later models. This water-inlet pipe had no three-hole flange, but a bolt or stud that went through the engine-end of the pipe by the elbow into the engine block itself. During some time at least in 1921 the original International imports had cast-in International names on the radiator instead of a brass name plate.

This information is partly derived from original International Harvester Company literature and true facts and shouldn't be edited any further. This information SHOULD NOT be copied for book purposes. Added by IH_15-30_expert.

Factory locations Edit

International Harvester Milwaukee Works, Milwaukee, Wisconsin

Specification Edit

See Infobox for basic details

Variations and Options Edit

Serial Numbers Information Edit

Year Serial run[1] Number Built Notes (Total built 1549).
1921 TG112-310 199 [111 prototype/pre-production tractors produced] Rare
1922 TG311-1660 1350

Preservation Edit

No information on any of these tractors in preservation is currently available on here.

Do you know of any examples to list ?
List of Preserved International 15-30 Gear Drive tractors
view  talk  edit
Make + Model No.
Reg No.
(if known)
Serial No. Build-Date Engine-Type/Make Owner
(if known)
Photo Were seen/Featured in Other info
Image needed LHB


Image needed LHB


Please add any tractor with known reg or serial no. with Photo if possible.
Create a page (link) for an individual tractor by linking the reg or serial number using reg number or serial number in the relevant column. Then once saved click the red link to start the new page and add info on that tractor.


Gallery Edit

Add extra photos here please.


See also Edit

Collection related info
  • Shows and Meets - events featuring tractors and other machinery
  • Clubs Listing - List of clubs including various tractor marques
  • Collections - list of private collections with tractors (add yours)
  • Museums - includes museums featuring tractors (please add missing ones)

References / Sources Edit

  1. Wendel, C. H. 1981. 150 Years of International Harvester, Crestline Publishing Co., Sarasota, Florida. (serial numbers p.411)

External Links Edit


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