559D Knuckleboom Loader

559D Knuckleboom Loader

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Engine

Gross Power
173HP
Engine Model
Cat C4.4 ACERT
Gross Power - 1,800 rpm
173HP

Operating Specifications

Knuckleboom Length
32ft
Swing Speed
11r/min
Note
*Theoretical
Maximum Reach - Standard Boom
32ft
Swing Bearing - Diameter - Ball Path
43.5in
Swing Torque*
49173ft·lbf
Tail Swing
106in

Weights

Operating Weight
33800lb
Operating Weight - Without Grapple
33800lb
Counterweight
N/A

Service Refill Capacities

Hydraulic Tank
80gal (US)
Fuel Tank
100gal (US)
Swing Drive
1gal (US)
Engine Oil
2.1gal (US)
Cooling System
7.5gal (US)
DEF Tank
5gal (US)

Dimensions

Stabilizer Pad Size
508 × 711 mm (20 × 28 in)
Stabilizer Reach Below Grade
17in
Stabilizer Spread - Maximum Down Reach
166.8in
Height - Top of Cab
157.6in
Stabilizer Spread - Grade
187.3in
Note
559D dimensions are on non-suspension trailer.

Hydraulic System

Hydraulic Pressure - System
3625psi
Hydraulic Pressure - Swing
3625psi
Cylinders - Stick
one
Cylinders - Main
one
Cylinders - Stabilizers
four
Hydraulic Oil Flow at 1,800 rpm
230/174 L/min (60/46 gal/min)

Standards

OFPS
OFPS cab meets SAE J2267

Shipping Dimensions - Mounted Trailer

Width
101.3in
Height
157.6in

GLK Series Grapples - GLK55

Height - Open - Excluding Rotation
46.7in
Height - Open - Including Rotation
68in
Weight - Excluding Rotation
1411lb
Weight - Including Rotation
1911lb
Area (tip to tip)
3.8ft²
Open
54in
Close
5in
Note
All specifications are approximate.

GLK Series Grapples - GLK48

Height - Open - Excluding Rotation
45.1in
Height - Open - Including Rotation
66in
Weight - Excluding Rotation
1407lb
Weight - Including Rotation
1907lb
Area (tip to tip)
3ft²
Open
48in
Close
4.5in
Note
All specifications are approximate.

Performance

  • The Cat® C4.4 ACERT™ U.S. EPA Tier 4 Final engine provides equivalent power (129.3 kW/173 hp) and optimized performance compared to C Series while minimizing overall fluid consumption
  • Advanced controls manage pump and engine interface to optimize performance and fuel efficiency
  • Leading hydraulic multi-functioning capability enables operator to lift, swing, and rotate grapple simultaneously without impairing performance

Efficiency

  • Auto idle minimizes fuel consumption when machine is on and not actively working
  • High capacity cooling system only pulls in cool external air to maximize efficiency
  • Electrically controlled variable speed fan is modulated to provide cooling only as required, reducing fluid consumption

Comfort

  • Smooth hydraulic controls and superior balance provide market leading comfort and controllability
  • High capacity HVAC system provides dependable cooling and heating for maximum comfort
  • Improved stabilizer controls to equalize stabilizer actuation resulting in optimized uniformity of footing in varying ground conditions

Safety

  • Stabilizer movement alarm alerts bystanders of stabilizer movement
  • Pilot enable alarm alerts bystanders when pilot function is engaged
  • Ground level access of engine, fuel, pilot, and case drain filters as well as electrical service box

Durability

  • Reinforced fabricated booms with optimized cross sections designed to withstand heavy side-to-side delimbing applications and maximize lift capability
  • Field proven cooling system keeps engine and robust hydraulic system cool, extending component life
  • Larger diameter pins feature heavy-duty plating for improved durability and excluder seals to retain grease and keep free of SP contaminant

Serviceability

  • Single cylinder main boom has fewer parts to service than traditional dual cylinder lift system
  • Standard electric fill pump for hydraulic oil is at ground level for safe, easy service
  • Hinged doors provide industry-leading access to core components, daily check points, and service locations

Cat Work Tools

  • Optimized Cat XT™-6 ToughGuard™ hose routings on GLK Series grapple designed to minimize loosening of fittings and improve hose life
  • Larger GLK Series cylinder pins and bushings reduce bearing stress by 25 percent
  • Available now in both a TW “Tapered Wide” and SN “Straight Narrow,” the GLK Series grapple is suitable for additional applications
  • Standard hold valves on GLK Series log grapples improve log retention
  • GLK Series grapples feature optional three port swivel which allows mounting of grapple saw
  • DLK426 delimber knives now have larger diameter pins that reduce bearing stress by 12 percent

Standard Equipment: