Cat Trailer Mount Knuckleboom Loaders 579D
Product Feature
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
Product Parameter
Overview
Engine
Units:
| Gross Power | 173.0 HP | 129.3 kW |
| Engine Model | Cat C4.4 ACERT | Cat C4.4 ACERT |
| Gross Power - 1,800 rpm | 173.0 HP | 129.3 kW |
Weights
| Operating Weight | 36500.0 lb | 16556.0 kg |
| Counterweight | 1440.0 lb | 653.0 kg |
| Operating Weight - Without Grapple | 36500.0 lb | 16556.0 kg |
Operating Specifications
| Knuckleboom Length | 32.0 ft | 9.8 m |
| Swing Speed | 9.5 r/min | 9.5 r/min |
| Maximum Reach - Standard Boom | 32.0 ft | 9.8 m |
| Note | *Theoretical | *Theoretical |
| Swing Bearing - Diameter - Ball Path | 43.5 in | 1105.0 mm |
| Swing Torque* | 73800.0 ft·lbf | 100360.0 N·m |
| Tail Swing | 108.2 in | 2750.0 mm |
Service Refill Capacities
| Hydraulic Tank | 80.0 gal (US) | 302.0 l |
| Fuel Tank | 100.0 gal (US) | 378.0 l |
| Cooling System | 7.5 gal (US) | 29.0 l |
| Engine Oil | 2.1 gal (US) | 8.0 l |
| Swing Drive | 2.6 gal (US) | 4.0 l |
| DEF Tank | 5.0 gal (US) | 19.0 l |
Hydraulic System
| Cylinders - Main | one | one |
| Cylinders - Stabilizers | four | four |
| Cylinders - Stick | one | one |
| Hydraulic Oil Flow at 1,800 rpm | 230/230 L/min (60/60 gal/min) | 230/230 L/min (60/60 gal/min) |
| Hydraulic Pressure - Swing | 3625.0 psi | 24994.0 kPa |
| Hydraulic Pressure - System | 3625.0 psi | 24994.0 kPa |
Dimensions
| Stabilizer Pad Size | 508 × 711 mm (20 × 28 in) | 508 × 711 mm (20 × 28 in) |
| Stabilizer Reach Below Grade | 15.5 in | 394.0 mm |
| Stabilizer Spread - Maximum Down Reach | 166.8 in | 4237.0 mm |
| Height - Top of Cab | 159.1 in | 4041.0 mm |
| Stabilizer Spread - Grade | 183.8 in | 4670.0 mm |
| Note | 579D dimensions are on suspension trailer. | 579D dimensions are on suspension trailer. |
Standards
| OFPS | OFPS cab meets SAE J2267 | OFPS cab meets SAE J2267 |
Shipping Dimensions - Mounted Trailer
| Height | 159.1 in | 4041.0 mm |
| Width | 101.3 in | 2573.0 mm |
GLK Series Grapples - GLK48
| Area (tip to tip) | 3.0 ft² | 0.91 m² |
| Close | 4.5 in | 114.0 mm |
| Height - Open - Excluding Rotation | 45.1 in | 1146.0 mm |
| Height - Open - Including Rotation | 66.0 in | 1685.0 mm |
| Note | All specifications are approximate. | All specifications are approximate. |
| Open | 48.0 in | 1219.0 mm |
| Weight - Excluding Rotation | 1407.0 lb | 638.0 kg |
| Weight - Including Rotation | 1907.0 lb | 865.0 kg |
GLK Series Grapples - GLK55
| Area (tip to tip) | 3.8 ft² | 1.15 m² |
| Close | 5.0 in | 127.0 mm |
| Height - Open - Excluding Rotation | 46.7 in | 1186.0 mm |
| Height - Open - Including Rotation | 68.0 in | 1724.0 mm |
| Note | All specifications are approximate. | All specifications are approximate. |
| Open | 54.0 in | 1372.0 mm |
| Weight - Excluding Rotation | 1411.0 lb | 640.0 kg |
| Weight - Including Rotation | 1911.0 lb | 867.0 kg |
