The Honda H5518 is a lawn tractor with small 0.64 l (635 cc, 38.7 cu-in) two-cylinder water-cooled gasoline engine Honda GX640. The Honda H5518 tractor is equipped with selective sliding 8 speeds forward and 4 speeds reverse transmission. The Honda H5518 small tractor was produced from 1991 through 1999.
The Honda GX640 develops 18.0 HP (13.2 kW) at 3,600 rpm and 46.1 Nm (4.7 kg·m, 34.0 ft·lb) of torque at 2,500 rpm. It is a liquid-cooling motor with a 76.0 mm (3.0 in) cylinder bore and a 70.0 mm (2.8 in) stroke, and 8.0:1 compression ratio. The has an OHV design with two valves per cylinder; horizontal type carburetor with a butterfly valve; C.D.I.(Capacitor Discharge Ignition) ignition system, a mechanical centrifugal governor and electric starter.
The Honda H5518 tractor used a mechanical leading-trailing shoe type brakes and pinion-and-sector four-wheel steering. The tactor has 150 mm (5.9 in.) of ground clearance. The Honda H5518 is avalible in two versions:
- A4 type – four-wheel drive (4WD);
- A2 type – two-wheel drive (2WD)
Honda H5518 specifications
| General Specifications | |
| Model | Honda H5518 |
| Length | 2,190-2,370 mm (86.2-93.3 in) |
| Width | 1,070-1,125 mm (42.1-44.3 in) |
| Height | 1,235 mm (48.6 in) |
| Wheel base | 1,305 mm (51.4 in.) |
| Dry weight | 457.0-480.0 kg (1,008-1,058 lbs) |
| Front tires size | 20×7.0-12 |
| Front tires pressure | 98 kPa (1.0 kg/cm2, 14 psi) |
| Rear tires size | 24.5×8.0-14 |
| Rear tires pressure | 79 kPa (0.8 kg/cm2, 11.4 psi) |
| Fuel tank capacity | 9.0 l (2.38 US gal., 1.98 Imp gal.) |
| Battery | 12V-30AH |
| Engine | |
| Engine model | Honda GX630 |
| Displacement | 635 cm3 (38.7 cu-in) |
| Bore x stroke | 76.0 x 70.0 mm (3.0 x 2.8 in.) |
| Max. horsepower | 18.0 HP (13.2 kW) at 3,600 rpm |
| Max. torque | 46.1 Nm (4.7 kg·m, 34.0 ft·lb) at 2,500 rpm |
| Carburetor | Horizontal type, butterfly valve |
| Cooling system | Liquid-cooling |
| Ignition system | CDI ignition |
| Lubricating system | Forced oil by trochoid pump |
| Starting system | Electric starter |
| Stoping system | Cut off the power supply to the CDI (Open) |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Spark plug | NGK: BPR5ES-11 NIPPONDENSO: W16EPR-11 |
| Oil type | Honda 4-stroke or an equivalent (SE or SF) |
| Recommended oil | SAE 10W-40 |
| Oil capacity (without filter changed) | 2.0 L (2.11 US qt, 1.76 Imp qt) |
| Oil capacity (with filter changed) | 2.3 L (2.43 US qt, 2.02 Imp qt) |
| Transmission | |
| Gear type | Selective sliding 8 speeds forward and 4 speeds reverse transmission |
| Gear selections | 8 forward, 4 reverse |
| Groung speeds |
Forward: 1 (L-1): 0.7 km/h (0.4 mph) 2 (H-1): 1.1 km/h (0.7 mph) 3 (L-2): 1.5 km/h (0.9 mph) 4 (H-2): 2.4 km/h (1.5 mph) 5 (L-3): 3.4 km/h (2.1 mph) 6 (H-3): 5.3 km/h (3.3 mph) 7 (L-4): 7.1 km/h (4.4 mph) 8 (H-4): 11.1 km/h (6.9 mph) Reverse: |
| Frame | |
| Brakes | Mechanical leading-trailing shoe type brake (rear wheels) |
| Steering | Pinion-and-sector four-wheel steering |
| Hydraulic system | |
| Working pressure | 90 kg/cm2 (1,280 psi) |
| Pump type | Gear pump |
| Oil capacity | 2.0 L (2.1 US. qt) |
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