Valmet 8550

Last Updated: July 2024

Overview

The Valmet 8550 tractor is powered by a Valmet Diesel engine with 6 cylinders, liquid cooling, and turbocharging. It has a displacement of 449 cubic inches, with a bore of 4.251 inches and a stroke of 5.276 inches. The engine delivers a rated power output of 141.6 hp at 2200 RPM and a maximum torque of 458 lb-ft at 1246 RPM, with a torque rise of 35.5%. The transmission is a selective gear fixed ratio with partial (3) range operator controlled powershift, offering 36 forward and 36 reverse gears. The tractor features front-wheel assist and hydrostatic steering, with multiple wet disc hydraulic brakes and a 12-volt starting system. The hydraulic system has a maximum force of 9755 lbs at the frame and 13285 lbs at the lower link ends, with a pump delivery rate of 19.4 GPM at minimum pressure and 18.8 GPM at maximum hydraulic power of 25.4 HP. The tractor has an operating weight of 11410 lbs, with front tires sized 16.9R28 and rear tires sized 20.8R38. Detailed drawbar performance, fuel consumption, and sound level data are available from independent testing.
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Key Specifications

Power Output: 141.6

Transmission: selective gear fixed ratio with partial (3) range operator controlled powershift

Operating Weight: 11410

Fuel Type: diesel

Technical Specifications

Engine

Manufacturer
Valmet Diesel
Model
Valmet Diesel
Cooling Type
liquid-cooled
Cylinder Orientation
-
Valve Configuration
-
Fuel Type
diesel
Induction Type
turbocharged
Cylinders
6
Displacement (ci)
449.0
Bore (in)
4.251
Stroke (in)
5.276
Rated RPM
2200
Power Output (hp)
141.6

Transmission

Type
selective gear fixed ratio with partial (3) range operator controlled powershift
Forward Gears
36
Reverse Gears
36
Total Gears
-

Dimensions

Length (in)
194.5
Width (in)
88.2
Height (in)
111.8 (Height (exhaust))
Operating Weight (lb)
11410

Power Take-Off (PTO)

PTO Type
540/1000
PTO Speed 1 (rpm)
-
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
-
Drive Type
-
Steering Type
-
Coolant Capacity (qts)
-
Front Tire Diameter (in)
-
Front Tire Width (in)
-
Rear Tire Diameter (in)
-
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
Ag
Manufacture - End Year
-
Hitch Type
III
Hitch Category
Category 3
Hitch Position
-
Hitch Capacity (lb)
-
Operator Station Type
-
Starter Type
electric
Brake Type
-
Hydraulic System Type
-

Test Results

Nebraska Tractor Test Laboratory - Test Date: May to July, 1996

Maximum Power and Fuel Consumption

  • Rated Engine Speed (2200 rpm): 141.6 HP (105.6 kW) with fuel consumption of 8.66 Gal/hr (32.8 l/h) and fuel efficiency of 0.427 lb/hp.hr (0.260 kg/kW.h)
  • Standard PTO Speed (1000 rpm, 2077 engine rpm): 145.0 HP (108.1 kW) with fuel consumption of 8.45 Gal/hr (32.0 l/h) and fuel efficiency of 0.408 lb/hp.hr (0.248 kg/kW.h)
  • Maximum Power (2 hours): 145.0 HP (108.1 kW) with fuel consumption of 8.45 Gal/hr (32.0 l/h) and fuel efficiency of 0.408 lb/hp.hr (0.248 kg/kW.h)

Drawbar Performance

  • Maximum Power (27th Gear): 125.8 HP (93.8 kW) with a drawbar pull of 6480 lbs (28.8 kN), speed of 7.28 mph (11.7 km/h), and a fuel consumption of 0.477 lb/hp.hr (0.290 kg/kW.h)
  • 50% of Pull at Maximum Power (27th Gear): 74.8 HP (55.8 kW) with a drawbar pull of 3280 lbs (14.6 kN), speed of 8.55 mph (13.8 km/h), and a fuel consumption of 0.628 lb/hp.hr (0.382 kg/kW.h)

Torque and Engine Performance

  • Maximum Torque: 458 lb.-ft. (621 Nm) at 1246 rpm
  • Torque Rise: 35.5%

Hydraulic Performance

  • Maximum Force Exerted Through Whole Range: 9755 lbs (43.4 kN) at the frame, 13285 lbs (59.1 kN) at lower link ends
  • Pump Delivery Rate at Minimum Pressure: 19.4 GPM (73.6 l/min)
  • Hydraulic Power: 25.4 HP (18.9 kW) at delivery pressure of 2320 psi (160 bar)

Tractor Sound Level

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