Montgomery Ward Twin 20
The Montgomery Ward Twin 20 is a tractor produced by Montgomery Ward Lawn Tractors. It is equipped with a 816 cc 49.8 ci engine. The rated power output is 19.9 hp 14.8 kW. Transmission: Sundstrand. Operating weight: 600 lbs 272 kg.
Engine Power
19.9 hp
14.8 kW
Fuel & Capacities
3.8 gal
14.4 L
Transmission
Sundstrand
Operating Weight
600 lbs
272 kg
Montgomery Ward Lawn Tractors Montgomery Ward Twin 20 Serial Number & Year Decoder
Find the exact manufacture year of your tractor by checking your chassis serial number below.
Where to Find the Serial NumberThe serial number plate is commonly located on the front frame, tractor transmission housing (right side), or instrument panel badge.
Overview
 | 1975 - 1976
Garden tractorSimplicity built |
|---|---|
1975 - 1976 | |
Garden tractor | |
Simplicity built | |
1975 - 1976 | |
|---|---|
Garden tractor | |
Simplicity built |
Production | |
|---|---|
Distributor | Montgomery Ward |
Manufacturer | Simplicity |
Garden tractor | |
Built in Port Washington, Wisconsin, USA | |
Original price was $3,650 in 1975 | |
The Montgomery Ward Twin 20 carried model codes SIM33300, SIM33301, SIM33302 and SIM33303 depending on tire options. | |
Variants | |
|---|---|
9020 | similar Simplicity model |
720 | similar Allis Chalmers model |
Montgomery Ward Twin 20 Engine | |
|---|---|
19.9HP Onan 816cc 2-cyl gasoline | |
Fuel tank | 3.8 gal
14.4 L |
Engine details ...  | |
Montgomery Ward Twin 20 Transmission | |
|---|---|
hydrostatic | |
Transmission details ...  |
Mechanical | |
|---|---|
Two-wheel drive | |
Manual steering | |
Disc brakes | |
Open operator station. |
Hydraulics | |
|---|---|
Pressure | 500 psi
34.5 bar |
Front valves | 1 |
Total flow | 2.5 gpm
9.5 lpm |
Tractor hitch | |
|---|---|
Rear Type | 0 |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Clutch | electric |
Rear PTO Type | 2000 |
Front PTO | independent |
Clutch | electric |
Front PTO Type | 3600 |
Dimensions & Tires | |
|---|---|
Wheelbase | 56 inches
142 cm |
Weight | 1300 lbs
589 kg |
Front tire | 20x8.00-10 |
Rear tire | 29x12.00-15 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | flywheel alternator |
Charging amps | 20 |
Charging volts | 12 |
Battery volts | 12 |
Battery AH | 45 |
References | |
|---|---|
 | |
Lawn, Garden & Farm Catalog published in 1975, by Montgomery Ward | |
Suburban Farm & Garden Catalog published in 1976, by Montgomery Ward |
Engine
| 1975 - 1976
Garden tractorSimplicity built |
|---|---|
1975 - 1976 | |
Garden tractor | |
Simplicity built | |
1975 - 1976 | |
|---|---|
Garden tractor | |
Simplicity built |
Engine Detail — 816 cc / 49.8 ci Gasoline
Manufacturer | Onan CCKB |
Fuel Type | Gasoline |
Configuration | 2-cylinder, air-cooled horizontal-shaft opposed-twin |
Displacement | 816 cc
49.8 ci |
Bore/Stroke | 3.25x3.00 inches
83 x 76 mm |
Power (gross) | 19.9 hp
14.8 kW |
Air cleaner | paper element |
Compression | 7:1 |
Rated RPM | 3600 |
Idle RPM | 1300-3850 |
Starter | electric |
Starter volts | 12 |
Sparkplug | Champion H-8 |
Autolite AL5 | |
Sparkplug gap | 0.025 inches
0.635 mm |
Point gap | 0.020 inches
0.508 mm |
Intake valve clearance | 0.007 inches (cold)
0.178 mm |
Exhaust valve clearance | 0.016 inches (cold)
0.406 mm |
Oil capacity | 4 qts
3.8 L |
Oil change | 100 h |
Transmission
| 1975 - 1976
Garden tractorSimplicity built |
|---|---|
1975 - 1976 | |
Garden tractor | |
Simplicity built | |
1975 - 1976 | |
|---|---|
Garden tractor | |
Simplicity built |
Transmission — Sundstrand
Transmission | Sundstrand | |||
Type | hydrostatic | |||
Gears | infinite forward and reverse (3-range) | |||
Oil capacity | 6 qts
5.7 L | |||
Oil type | ATF AATF FDextron | ATF A | ATF F | Dextron |
 | ||||
ATF A | |
|---|---|
ATF F | |
Dextron |
Dimensions
| 1975 - 1976
Garden tractorSimplicity built |
|---|---|
1975 - 1976 | |
Garden tractor | |
Simplicity built | |
1975 - 1976 | |
|---|---|
Garden tractor | |
Simplicity built |
Montgomery Ward Twin 20 Tires | |
|---|---|
Lawn/turf front | 20x8.00-10 |
Lawn/turf rear | 29x12.00-15 |
Dimensions | |
|---|---|
Wheelbase | 56 inches
142 cm |
Length | 83 inches
210 cm |
Width | 56 inches
142 cm |
Height (steering wheel) | 48 inches
121 cm |
Shipping weight | 1300 lbs
589 kg |
Clearance (front axle) | 15 inches
38 cm |
Clearance (drawbar) | 13 inches
33 cm |
Attachments
| 1975 - 1976
Garden tractorSimplicity built |
|---|---|
1975 - 1976 | |
Garden tractor | |
Simplicity built | |
1975 - 1976 | |
|---|---|
Garden tractor | |
Simplicity built |
Attachment overview | |
|---|---|
60" mid-mount mower deck | |
Snowblower | |
Blade | |
Front-end loader | |
Backhoe | |
Advertised attachments for the Montgomery Ward Twin 20 included a 48-inch PTO-driven tiller and a Danco-built 48-inch rear rotary mower. |
60" Mower deck | |
|---|---|
Type | mid-mount Montgomery Ward 33305 |
3-blade | |
Cutting width | 60 inches
152 cm |
Weight | 280 lbs
127 kg |
Montgomery Ward 33319 Backhoe | |
|---|---|
Backhoe type | Montgomery Ward 33319 Backhoe |
Weight | 600 lbs
272 kg |
Digging depth | 72 inches
182 cm |
Reach from pivot | 108 inches
274 cm |
Swing Arc | 135° |
Photos
Montgomery Ward Twin 20 tractor photo