New Holland Workmaster 55

Last Updated: July 2024

Overview

The New Holland Workmaster 55 is a utility tractor powered by a 4-cylinder, turbocharged ISM Diesel engine with a displacement of 135 cu-in. It produces a maximum power output of 49.36 hp at 2700 rpm and a peak torque of 115 lb-ft at 1850 rpm. The engine has a compression ratio of 23.4:1 and a nominal turbo boost range of 7.3-9.4 psi. Available in 2WD and 4WD configurations, it features an 8-speed transmission for 2WD models and a 12-speed transmission for 4WD models. The hydraulic system is direct engine-driven, with a maximum force exerted of 2942 lbs and a pump delivery rate of 11.3 GPM at rated engine speed. The unladen tractor mass is 4385 lbs, and it can be equipped with a New Holland 615TL loader.
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Key Specifications

Category: Utility

Power Output: 49.36 hp

Operating Weight: 4385 (Unladen tractor mass)

Fuel Type: No. 2 Diesel

Lift Capacity: 2580 lbs (lift capacity at ends)

New Holland Workmaster 55 vs. Similar Tractors

Power Output
Average
Greater than 53% of similar tractors.
Hitch Capacity
Average
Greater than 43% of similar tractors.
Operating Weight
Above Average
Greater than 74% of similar tractors.

Technical Specifications

Engine

Manufacturer
ISM Diesel
Model
-
Cooling Type
Liquid-cooled
Cylinder Orientation
Inline
Valve Configuration
-
Fuel Type
No. 2 Diesel
Induction Type
Turbocharged
Cylinders
4
Displacement (ci)
135 cu·in
Bore (in)
3.307
Stroke (in)
3.937
Rated RPM
2700
Power Output (hp)
49.36 hp

Transmission

Type
-
Forward Gears
-
Reverse Gears
-
Total Gears
8 forward and 8 reverse (2WD), 12 forward and reverse (4WD)

Dimensions

Length (in)
130.7 (2WD), 133.5 (4WD)
Width (in)
67.3
Height (in)
95.7
Operating Weight (lb)
4385 (Unladen tractor mass)

Power Take-Off (PTO)

PTO Type
Independent
PTO Speed 1 (rpm)
540
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
-
Drive Type
-
Steering Type
Hydrostatic power
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
-
Manufacture - End Year
2014
Hitch Type
Unknown (Category II/I suggests standard three-point hitch)
Hitch Category
II/I
Hitch Position
-
Hitch Capacity (lb)
2580 lbs (lift capacity at ends)
Operator Station Type
Two-post foldable ROPS
Starter Type
Electric
Brake Type
Differential mechanical wet disc
Hydraulic System Type
Direct engine drive

Test Results

Nebraska Tractor Test Laboratory - Test Date: December 7 to 9, 2011

Maximum Power and Fuel Consumption

  • Maximum Power at Rated Engine Speed: 49.36 HP (36.81 kW) at 2700 rpm
  • Fuel Consumption at Maximum Power: 3.49 Gal/hr (13.20 l/h) with a fuel efficiency of 0.498 lb/hp.hr (0.303 kg/kW.h)
  • Power Take-off (PTO) Speed at 540 rpm: 48.94 HP (36.50 kW) with a fuel consumption of 3.35 Gal/hr (12.70 l/h)

Drawbar Performance

  • Maximum Drawbar Pull: Not specified in the provided data
  • Power at Rated Engine Speed: Not specified in the provided data

Torque and Engine Performance

  • Maximum Torque: 115 lb.-ft. (156 Nm) at 1850 rpm
  • Torque Rise: 19.7%

Hydraulic Performance

  • Maximum Force Exerted Through Whole Range:
  • Sustained pressure of the control valve: 2942 lbs (1304 kg)
  • Pump Delivery Rate at Minimum Pressure and Rated Engine Speed: 11.3 GPM (42.6 l/min)
  • Hydraulic Power: 10.9 HP (8.1 kW) at 2301 psi (159 bar)

Sound Level

  • Sound Level Without Cab at By-Stander Position: Not specified in provided data



NTTL.(2011).Test 2012A: New Holland Workmaster 55 Diesel. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/3430

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