Ford 9N and 2N Specification

“Little known things about a Classic Tractor that changed the world.”
Researched by Robert Brown.

1939 9N
ENGINE: 4 cylinder L head BORE: 3. 187 x 3.75
PISTON DISPLACEMENT: 119.7 cu in COMPRESSION RATIO: 6 to 1 HORSEPOWER: Maximum Belt HP. 23.87 Rated Belt HP 85% of max . 20.29
DRAWBAR: 2-14″ plow capacity with Ferguson hydraulically operated imple­ments. Maximum drawbar without Fer­guson hydraulic system control. 16.9 HP
Rated HP. 75% of maximum 12.68 GOVERNOR: Variable speed, controlled from steering column. working range, up to 2200 rpm .
LUBRICATION: by gear pump supplying direct pressure oiling to crankshaft. camshaft, connecting rod bearings, and timing gears.
OIL FILTER: replaceable cartridge type of large capacity
IGNITION: Direct-driven battery dis­tributor in unit with coil in waterproof housing. Fully automatic spark advance.
GENERATOR: 6-volt shunt wound with vibrator type voltage regulation.
STARTER: 6-volt conventional type automobile starter with finger operated switch on dash.
BATTERY: 6-volt, 85 ampere-hour capacity. 13 high plates
COOLING: Pump circulation of water through tube and fin type radiator; fan (pusher) 4 blade 16″, belt driven; pump is packless type with pre-lubricated bearings.
FUEL SUPPLY; welded steel tank carried in engine hood. capacity 9 gal plus 1 gal reserve. Fuel filter is stan­dard equipment.
CARBURETOR: Up-draft, plain tube type of sturdy. dust-proof construc­tion.
AIR CLEANER: oil bath type with dust receptacle easily removed for cleaning. MUFFLER: reverse flow type; fitted as standard equipment to carry exhaust to rear of tractor.
CLUTCH: single dry plate 9″ effective diameter plate. pressure increased by centrifugal force as engine speed is in­creased.
TRANSMISSION: sliding gear, 3 speeds forward ,1 reverse. All shafts mounted on tapered roller bearings. Final Drive: spiral bevel gear with straddle-mounted pinion 6.66 to 1 ratio. Four pinion differential mounted to tapered roller bearings. Drive axle of semi-floating type with axle shaft and wheel hub integral. also carried on tapered roller bearings
DRAWBAR: adjustable type, standard equipment
Gear Final Gear Reduction
Speed @ 1400 rpm
Low 73.3 to 12.51 mph
Second 57.0 to 13.23 mph
High 24.6 to 17.48mph
Reverse 68.4 to 12.69 mph
STEERING: bevel pinion and twin bevel controlling both front wheels indepen­dently. Tread of front axle adjustable without disturbing any steering connec­tion. Rubber covered steel 4-spoke steering wheel, 18″ diameter
POWER TAKE OFF: shaft extends from rear of axle housing with standard spline end. for fitting to drive shaft of power driven equipment, 509 rpm at engine speed of 1400 rpm. Extra equipment – Belt Pulley carried by self­-contained drive unit quickly attachable to same area of tractor.
BRAKES: 14″ x 2″ internal expanding, two shoe, full energizing type. One simple accessible adjustment. Brakes operating independently on each rear wheel controlled by separate pedals to facilitate short turning.
WHEELS. FRONT: steel disc fitted with 4 x 19 single rib pneumatic tyres on drop centre rim. 26 psi.
WHEELS. REAR: steel disc fitted with 8 x 32 traction tread pneumatic tyres on drop centre rim, 12 psi.
HYDRAULIC IMPLEMENT CONTROL: consists of a 4 cylinder pump supplying 011 under pressure to ram cylinder. Con­trol valve (on suction side of the im­mersed pump) is regulated by hand and automatically. Lever convenient to operator’s right hand gives instant con­trol of implement.
SHIPPING WEIGHT: approximately 2140lbs
NORMAL TREAD: Front and rear, 48″ FRONT TREAD: Adjustable by means of telescoping axle and reversing front and rear wheel discs to 76″ in 4″ steps. REAR TREAD: Adjustable by means of reversible wheel disc and reversible tyre rim to 76″ in 4″ steps.
OVERALL LENGTH: Front tyre fin to end of lower link, 115″
GROUND CLEARANCE: 13″ under centre, 21″ under axles.
MINIMUM TURNING CIRCLE: 15ft with use of brakes.

Front axle grease fittings face forward. Hood is cast before #4000
PTO and pulley attachment different before #7453
No safety starter
Starter button located next to ammeter Key located next to oil pressure gauge Ignition indicator below ammeter
Left brake pedal same casting as the right pedal
Grill is cast aluminium, horizontal bars Cover (hood top battery) not hinged until #10213
Both hinged and not-hinged available until #13884
Hinged became standard in 1940 at #13885

2 brush generator and cutout, 9N10000A, replaced by 3 brush units, 9N10000B, on 15/3/1940. Safety Starter Switch mechanically interlocked with gear shift lever, introduced at #12500 with some exceptions: 14 trac­tors were produced before #10732 which was the first; then #11148: #11400, #11470, #11497, then several in the #12000’s. After # 12500, there were 43 tractors produced with #12853 being the last of the non-safety starter models.
First ignition key location on the safety start models is in the right hand lower side of dash; second location is in the lower left hand side of dash. 

Hydraulic lift cylinder and hydraulic lift spring were changed at #47020 to heavier duty type.
Left hand brake pedal changed: now has small hoop in it (to facilitate hand use of brake while executing a left hand turn) Front axle grease fittings face rear. Ignition key location again. moved to left top side of steering gear assembly. Rear axle changed to 2-piece riveted assembly.
Transmission case changed at #47508 Transmission Oil Level Indicator changed at #47508
4-blade pusher fan now obsolete 6-blade pusher or pull type takes its place
(Service Bulletin #26, 29 Aug 1940, shows 6-bladed fan #9N8600B is sup­plied where extreme heat is ex­perienced)
Steel grill with solid centre and vertical rods replaces cast aluminium grill Larger. heavy-duty generator assy. 3­brush. introduced at #9N100000C
Steel rear wheel 9N11700 in parts book FORD rear tyres only in size 10 x 28. 4 ply

1942 2N
10 x 28 rear tyres become standard, 8 x 32 optional
Steering housing no longer cast, now made of steel;
Dash, steel at #80769
Steering wheel changed to 3-spoke, exposed spokes.
Stud to hold valve cover changed at #100000 to hold larger cover; cover also changed
No longer any chrome on 2N tractor
Cap and radiator changed to a pressure system at #109502 and now has 12 quart capacity (Service Bulletin # 139. 29 May 1944 indicates current produc­tion tractors are equipped with pressure type cooling system and fan shroud)

Front spindle and spindle arms changed at #109503
Lynch pin and ring became spring-­loaded (the spring loaded lynch pin. now universal the world over, was invented by John Chambers, senior Ferguson engineer. Problems with trash had resulted in the old ring pins jumping out) Crankshaft rachet and hand crank changed
9N starting crank 25. 22″ long and can be used on 9N. 2N. 8N. 1939 to 1952 2N starting crank 24.84″ long used with 2N.

Magneto introduced
Hood panel. right hand side. replaces 9N panel.
(2N panel is to have front choke control rod. magneto tractors only) 9 x 32 rear tyres supplied (fits 8 x 32 rim); 8 x 32 now obsolete.

Front support assembly pin and radius rods changed at #167488
All tractors after #140774 have helical gears with HX stamped on transmission case flange to indicate tractors with helical gears
Tractors #86271 to #168259 produced without intake valve seat insert. W. P . B. (War time controls) restrictions Headlight assembly now equipped with sealed beams

Heavier rear axle housing introduced at #174650

Heavier duty rear axle housing assembly appears to replace RH 9N-40 12-B and 2N-4035. LH 9N-40 13. and 2N­4035. These were the heaviest and had a date stamped on outside. front 2N-4012-A2 RH
2N-4013-A2 LH

1947 (could not find any changes for this year)

I am sure I missed something, and will appreciate it if anyone can bring any missing, incomplete. or incorrect items to my attention. I will try to do the 8N next. They were made for a shorter time but have more changes than the 9N and 2N.

This article is reproduced by kind permission of the 9N-2N-BN NEWSLETTER

Published in Ferguson Club Journal Volume 3 No.2 Autumn 1990