Allis-Chalmers 720 Specs ( 1975-1980 )
Overview
The Allis-Chalmers 720 is a garden tractor produced from 1975 to 1980 and manufactured by Simplicity in Port Washington, Wisconsin. It features a 19.5 hp Onan CCKB two-cylinder gasoline engine and a Sundstrand 3-range hydrostatic transmission. The machine is configured with an open operator station and has a shipping weight of 1,300 pounds.
Ideal Applications
Engine and Power Configuration:
The tractor is powered by an 816 cc Onan CCKB air-cooled gasoline engine that produces 19.5 gross hp at a rated speed of 3,600 RPM.
Transmission and Speed Range:
The Sundstrand hydrostatic transmission features three ranges with infinite forward and reverse gears and is paired with a 6-quart oil capacity.
Attachment and PTO Specifications:
The unit supports multiple attachments including a 60-inch mower deck and front-end loader, utilizing independent front and rear PTOs rated at 3,600 and 2,000 RPM respectively.
Production
| Description | Garden tractor / Built in Port Washington, Wisconsin, USA |
|---|---|
| Distributor | Allis Chalmers |
| Manufacturer | Simplicity |
Engine
| Description | Image courtesy of Mike Meyer |
|---|---|
| Air cleaner | paper element |
| Bore/Stroke | 3.25x3.00 inches (83 x 76 mm) |
| Compression | 7:1 |
| Description | Onan CCKB / gasoline / 2-cylinder / air-cooled horizontal-shaft opposed-twin |
| Displacement | 816 cc (49.8 ci) |
| Oil capacity | 3.5 qts (3.3 L) |
| Power (gross) | 19.5 hp (14.5 kW) |
| Rated RPM | 3600 |
| Starter volts | 12 |
Transmission
| Description | hydrostatic |
|---|---|
| Gears | infinite forward and reverse (3-range) |
| Manufacturer | Sundstrand |
| Oil capacity | 6 qts (5.7 L) |
| Type | hydrostatic |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual steering / Disc brakes |
| Drive type | Two-wheel drive |
Capacity
| Fuel | 3.8 gal (14.4 L) |
|---|---|
| Hydraulic system | 1.5 gal (5.7 L) |
Hydraulics
| Capacity | 1.5 gal (5.7 L) |
|---|---|
| Pressure | 500 psi (34.5 bar) |
| Pump flow | 2.5 gpm (9.5 lpm) |
Hitch
| Rear Type | 0 |
|---|
PTO
| Clutch | electric / electric |
|---|---|
| Front PTO | independent |
| Front PTO Type | 3600 |
| Rear PTO | independent |
| Rear PTO Type | 2000 |
Electrical
| Battery AH | 53 |
|---|---|
| Battery volts | 12 |
| Charging amps | 20 |
| Charging system | flywheel magneto |
| Ground | negative |
Dimensions & Tires
| Ag front | 4.00x12 |
|---|---|
| Ag rear | 8.00-16 |
| Lawn/turf front | 20x8.00-10 / 6.90/6.00-9 |
| Lawn/turf rear | 29x12.00-15 / 31x15.50-15 |
| Ground clearance | 15 inches (38 cm) |
| Height | 43.25 inches (109 cm) |
| Length | 83 inches (210 cm) |
| Shipping weight | 1300 lbs (589 kg) |
| Wheelbase | 56 inches (142 cm) |
| Width | 48 inches (121 cm) |
| Front tire | 20x8.00-10 |
| Rear tire | 29x12.00-15 |
| Weight | 1300 lbs (589 kg) |
| Wheelbase | 56 inches (142 cm) |
720 Serial Number Location
| Description | Right side of tractor frame. |
|---|
Allis Chalmers 720 attachments
| Description | 60" mid-mount mower deck / snowblower / blade / front-end loader / backhoe |
|---|
References
| Description | 1974 Buyer's Guide published by Allis-Chalmers / Allis-Chalmers Lawn and Garden Equipment published in 1975 |
|---|
Speeds
| Description | With 29x12.00-15 R3 tires. |
|---|
Variants
| 720 Special | economy model with no 3-point or rear PTO |
|---|---|
| 9020 | similar Simplicity model |