Yanmar lawn tractors
Yanmar YM122
The Yanmar YM122 is a garden tractor produced from 1983 to 1987. It features a 12 hp liquid-cooled 1-cylinder diesel engine with a displacement of 534 cc. The tractor has a 6-speed gear transmission with 3 reverse gears, two-wheel drive, manual steering, and mechanical drum brakes. It has an open operator station and uses an open center hydraulic system with 853 psi pressure. The tractor hitch rear lift capacity is 375 lbs at the ends and 276 lbs at 24 inches. The PTO includes a transmission-driven rear PTO and an independent front PTO with an electric clutch. The YM122 rides on 16x6.50-8 front and 23x10.50-12 rear lawn/turf tires. Attachments include 42" and 48" mid-mount mower decks. The original price was $5,000 in 1989.
Power-
Founded-
ModelYM122
Technical Specifications
Detailed specifications and technical data for Yanmar YM122
Engine
| Type | diesel |
|---|---|
| Model | Yanmar MA10-N |
| Power | 12 hp (8.9 kW) |
| Cooling | liquid-cooled |
| Idle RPM | 1400-2825 |
| Cylinders | 1-cylinder |
| Fuel tank | 2.6 gal (9.8 L) |
| Rated RPM | 2600 |
| Air cleaner | dry |
| Bore/Stroke | 3.46x3.46 inches (88 x 88 mm) |
| Displacement | 534 cc (32.64 ci) |
| Starter volts | 12 |
| Coolant capacity | 3.3 qts (3.1 L) |
| Engine oil capacity | 3.4 qts (3.2 L) |
| Oil change interval | 100 h |
Dimensions
| Width | 39.9 inches (101 cm) |
|---|---|
| Length | 75.5 inches (191 cm) |
| Rear tire | 23x10.50-12 |
| Wheelbase | 51.5 inches (130 cm) |
| Front tire | 16x6.50-8 |
| Shipping weight | 829 lbs (376 kg) |
| Ground clearance | 6.6 inches (16 cm) |
| Height (steering wheel) | 44.8 inches (113 cm) |
Electrical
| Ground | negative |
|---|---|
| Battery AH | 47 |
| Battery volts | 12 |
| Charging amps | 15 |
| Charging system | alternator |
Hydraulics
| Type | open center |
|---|---|
| Pressure | 853 psi (58.8 bar) |
| Pump flow | 2 gpm (7.6 lpm) |
Production
| Category | Garden tractor |
|---|---|
| Years made | 1983 - 1987 |
| Original price | $5,000 in 1989 |
Attachments
| Note | Garden tractors are capable of using tillers, plows, or other ground-engaging attachments. |
|---|---|
| 42" mid-mount mower deck | 42 inches (106 cm) |
| 48" mid-mount mower deck | 48 inches (121 cm) |
Transmission
| Type | gear |
|---|---|
| Gears | 6 forward and 3 reverse |
| Oil type | JDM303 |
| Description | Two gears, plus reverse, in three ranges. |
| Oil capacity | 6.7 qts (6.3 L) |
| Oil change interval | 300 h |
Tractor hitch
| Rear Type | 0 |
|---|---|
| Rear lift (at ends) | 375 lbs (170 kg) |
| Rear lift (at 24"/610mm) | 276 lbs (125 kg) |
Power Take-off (PTO)
| Clutch | electric |
|---|---|
| Rear PTO | transmission |
| Front PTO | independent |
| Rear PTO Type | 2000 |