Overview
The 525B Skidder is built to exceed all expectations for skidding performance, reliability and comfort, while maximizing productivity.
Specifications
| Gross Power - SAE J1995 | — |
| Est. Operating Weight | — |
| Sorting Capacity | — |
Benefits & Features
Specifications
| Gross Power - SAE J1995 | — |
| Engine Model | Cat 3126 DITA diesel |
| Net Power - ISO 9249 | — |
| Net Power - SAE J1349 | — |
| Net Flywheel Power | — |
| Governed Speed at Rated Power | — |
| Displacement | — |
| Bore | — |
| Stroke | — |
| Torque Rise | 50% |
| Maximum Torque at Rated Speed | 779.1 @ 1400 Nm |
| Derating Altitude | — |
| Air Cleaner | dry centrifugal precleaner |
| Alternator | 75 Amp |
| Fan Speed | — |
| Fan Type | blower |
| Electrical System | 24 V |
| Battery Quantity | 2 |
| Battery - Volts | 12 V |
| Battery Capacity | 950 CCA |
| Starting System | direct electric |
| Number of Cylinders | 6 |
| Travel Speed - Forward 1 | — |
| Travel Speed - Forward 2 | — |
| Travel Speed - Forward 3 | — |
| Travel Speed - Forward 4 | — |
| Travel Speed - Forward 5 | — |
| Travel Speed - Reverse 1 | — |
| Travel Speed - Reverse 2 | — |
| Travel Speed - Reverse 3 | — |
| Maximum Drawbar Pull | — |
| Torque Converter - Model | 3308 Lock-up |
| Torque Converter Type | sngl stg, rotating housing |
| Transmission | Countershaft 5fwd/3rev |
| Steering, Frame Articulation | hydraulic control |
| Brakes - Service Type | hydraulic, wet disc |
| Brakes - Parking Type | drum |
| Transmission Cooler Type | Plate |
| Circuit Type | closed cntr, load sensing |
| Pump Type | axial piston |
| Pump Output | — |
| Relief Valve Setting | — |
| Reservoir Tank Capacity | — |
| Steering Valve | direct link, non-follow |
| Steering Cylinder - Bore | — |
| Steering Cylinder - Stroke | — |
| Steering Cylinder - Rod Diameter | — |
| Dozer Valve | direct linkage control |
| Dozer Cylinder - Bore | — |
| Dozer Cylinder - Stroke | — |
| Dozer Cylinder - Rod Diameter | — |
| Grapple Valve | 3or4 stack, pilot control |
| Sorting Capacity | — |
| Bunching - Capacity | — |
| Bunching - Full Open Height | — |
| Bunching - Fully Closed Height | — |
| Bunching - Minimum Stem Diameter | — |
| Bunching - Tip to Tip Height | — |
| Bunching - Tong Opening | — |
| Sorting - Full Open Height | — |
| Sorting - Fully Closed Height | — |
| Sorting - Minimum Stem Diameter | — |
| Sorting - Tip to Tip Height | — |
| Sorting - Tong Opening | — |
| Dual Function - Lift Highest, Retracted | — |
| Dual Function - Lift Highest, Farthest | — |
| Dual Function - Lift Maximum Reach | — |
| Dual Function - Lift Lowest, Retracted | — |
| Dual Function - Lift Lowest, Farthest | — |
| Dual Function - Reach Highest, Retracted | — |
| Dual Function - Reach Lowest, Retracted | — |
| Dual Function - Reach Lowest, Farthest | — |
| Dual Function - Reach Highest, Farthest | — |
| Dual Function - Reach Maximum | — |
| Single Function - Reach Maximum | — |
| Single Function - Lift Highest, Retracted | — |
| Maximum Line Pull - Bare Drum | — |
| Maximum Line Speed | — |
| Drum Capacity - 19.0 mm (3/4 in) | — |
| Drum Capacity - 22.2 mm (7/8 in) | — |
| Drum Capacity - 25.4mm (1 in) | — |
| Drum Diameter | — |
| Drum Width | — |
| Fuel Tank | — |
| Cooling System | — |
| Differential - Final Drives - Front | — |
| Differential - Final Drives - Rear | — |
| Engine Oil | — |
| Transmission - Torque Converter | — |
| Mechanical Winch | — |
| Hydraulic System - Tank | — |
| Hydraulic System - Total | — |
| Length | — |
| Overall Width | — |
| Height | — |
| Ground Clearance | — |
| Wheel Base | — |
| Est. Operating Weight | — |
Benefits & Features
Performance - Power Train
3126 DITA Engine
The Cat 3126 delivers reliable power with low emissions, excellent fuel economy, and traditional Caterpillar durability.
Torque Converter
The large, heavy-duty torque converter with a lockup clutch is matched to the Cat 3126 engine for excellent rimpull and improved skidding performance.
Five-Speed Transmission
The Caterpillar powershift countershaft transmission easily matches engine power to the load size and ground conditions. Gear 1 provides industry leading rimpull capability for heavy load applications, gears 2, 3 and 4 are for lighter loads and higher speed operations, while gear 5 provides excellent empty return speeds.
Differential Locks
Hydraulically engaged differential locks in both axles significantly expand the operating range of the 525B. They reduce tire slip during turns, improve flotation, and reduce tire wear. In addition, they enhance maneuverability by improving traction and allowing a tighter turning radius.
Performance - Hydraulics
Load Sensing Hydraulics
A load sensing variable displacement pump and pressure compensating system continually monitor hydraulic power requirements, and provide hydraulic power based on demand.
Winch
The 525B uses a high capacity winch with four-function control. This self-contained unit has a separate oil pump using winch sump oil for control, and to cool and lubricate the winch.
Auto-Grab Feature
Auto-Grab constantly monitors tong pressure and adjusts as needed to securely hold grapple loads. Like the load sensing hydraulic system, Auto-Grab places demand on engine horsepower only when the system senses a shift in the load that requires a change in tong pressure. It is easily activated on demand by a switch located on the right-hand control lever. Tractor operation is easier, constant tong pressure is maintained, and operating costs are reduced through greater fuel efficiency and less time spent re-gripping slipped loads.
Steering
Fully hydraulic control. Meets the following standards: SAE J1511 OCT90, ISO 5010-1992.
Cat Hoses
Caterpillar hose technology allows high pressures for maximum power and reduced downtime, and intelligent routing minimizes exposure to damage.
Durability - Undercarriage
Cradled Front Axle
Exclusive to Caterpillar wheel skidders, the cradled front axle with a high pivot center acts as a working counterweight, and delivers enhanced performance and operator comfort. It provides excellent fore-aft stability for large grapples and the dual-function arch. Heavy-duty trunnion bearings assure durable, reliable operation. The 15 degree oscillation absorbs minor shock loads, isolating the cab from axle movement for a smoother ride.
Final Drives
Heavy-duty inboard final drives are protected from the harsh logging environment, and use splash oil lubrication and cooling. This configuration makes wheel and tire removal and installation easier.
Brake Components
Brake components are housed inside the axles, protecting them from dirt, dust and wet ground conditions. Inboard brakes allow for splash lubrication and cooling, are virtually maintenance free, and provide reliable brake performance in the most demanding logging applications.
Oil Sump
Full axle-length oil sump delivers excellent lubrication and heat rejection for long component life. All components housed in the axle are splash lubricated, and outboard bearings are maintenance free. • Large oil capacity provides excellent heat rejection, ensuring proper lubrication.
Differential Locks
Differential locks provide added traction in poor ground conditions. On-the-go engagement / disengagement allows operator to maintain production without stopping.
Wheel Options
The 525B offers a choice of configurations allowing single or dual wheels. Duals (using 30.5 x 32 inner and 24.5 outer) or flotation tires increase flotation in wet, sloppy underfoot conditions, and improve stability on grades with large loads.
Durability - Structures
Box-Section Construction
The 525B frames use resilient box section construction that sets the industry standard for reliability and durability.
Front Frame
The front frame is designed with higher clearance to accommodate the front axle cradle mounts, and lower blade pivot mounting position.
Rear Frame
Tough rear frame provides the platform to support the grapple arch or cable arch configurations.
Ground Clearance
Maximized ground clearance improves maneuverability and avoids damage. Full belly guards protect all undercarriage components.
Decking Blade
Fabricated, box-section steel arms mount directly to the mainframe for superior strength.
Hitch
The bottom hitch is double-tapered for improved weight distribution, which reduces flexing stress and maintains tight joints.
Arches
The 525B single- and dual-function arches, and the cable arch are designed and tested to exceed durability requirements.
Grapples
Durable, high capacity sorting or bunching grapples are matched to machine size and horsepower for optimum performance.
Winch
The 525B winch attachment delivers the power and durability ideal for log truck towing, self-retrieval and log skidding.
ROPS / FOPS
Roll-Over Protection and Falling Object Protection guards offer protection to the operator and the machine.
Application Flexibility
Balance
Long front and rear frames and a low center of mass create excellent skidder balance. The powerful mechanically driven, heavy-duty winch provides outstanding grapple or cable skidder performance.
Torque Converter
The heavy duty lock-up torque converter offers two drive options: direct drive, the only option in many skidders, delivers excellent skidding power and speed; and torque converter drive, which provides torque multiplication and speed control, which reduces the need for frequent transmission gear changes.
Wheelbase
The 525B skidder has a wider, longer wheelbase to handle single- and dual-function arches and large capacity bunching grapples.
Tire Options
Expanded tire options allow the 525B to maintain outstanding skidding performance in a wide range of ground conditions.
Dual-Capable
The 525B is capable of using dual wheels with the installation of an optional dual axle. Duals increase flotation in poor underfoot conditions, and improve stability, especially when hauling large loads on a grade.
Arches and Blade
The 525B is available with a single- or dual-function arch, or the cable arch, and a decking blade to match the machine to the application.
Operator Comfort
Comfortable Work Station
The 525B work station incorporates years of cab design innovations to maximize operator comfort and productivity.
Machine Controls
The comfortable 525B operator environment uses ergonomically designed and placed machine controls to reduce fatigue and increase productivity.
Monitoring Controls
The 525B uses conveniently located and easy-to-see gauges and displays to make monitoring machine systems as simple as possible.
Additional
Pre-wired for an entertainment radio: two speakers, antenna and standard built-in 24-to-12-volt converter. The machine is fitted with on-off key switch engine operation.
Serviceability
Built-in Servicing Ease
Caterpillar uses intelligent engineering to make regular maintenance procedures quick and simple. Easy access to daily service points increases the likelihood that maintenance will be done, extending machine service life and lowering overall operating costs. In addition, less service time means more working time and greater productivity.
Ground Level Access
Most filters and lube points are accessible from the ground. Remote lubrication points make daily attention to hard-to-reach joints easy.
Centrifugal Pre-Cleaner
Centrifugal pre-cleaner removes large debris before it reaches the internal air cleaner to provide significant engine protection.
S·O·Ssm and Coolant Sampling Valves
Provide a fast, convenient means of obtaining uncontaminated fluid samples, which improves analysis reliability.
Radial Seal Air Filters
Hand access makes them easy to change, reducing air filter maintenance times.
Bolt-on Guards
Offer protection to critical components, but are easily removable for fast service access. Removable floor plates and side plate allow access to components under the cab.
Turbocharger Location
The relocated turbocharger provides easy access to the air cleaner and allows the cab compartment to be sealed from dust and debris.
Spin-on Oil Filters
Spin-on filters for fuel and oil systems reduce changing time, and help assure clean, tight seals.
Pressure Taps
Conveniently located for easy access to hydraulic system pressure measurements.
Ecology Drains
Located on the axle and transmission to make regular maintenance easier, and protect the environment from accidental oil spills.
Electrical System
24-volt electrical system delivers increased electrical power for engine cranking, lights, and engine diagnostics. Wiring circuits are color coded, numbered and protected by circuit breakers.
On-Board Diagnostic Systems
The Caterpillar Monitoring System continuously checks all critical machine functions and components, and helps locate faults quickly for faster repair.
Customer Support
Product Support
You will find nearly all parts at our dealer parts counter. Cat dealers use a world-wide computer network to find in-stock parts to minimize machine down time. Save money with genuine Cat Reman parts. You receive the same warranty and reliability as new products at cost savings of 40 to 70 percent.
Machine Selection
Make detailed comparisons of the machines under consideration before purchase. Cat dealers can estimate component life, preventive maintenance cost, and the true cost of lost production.
Purchase
Look past initial price. Consider the financing options available as well as day-to-day operating costs. Look at dealer services that can be included in the cost of the machine to yield lower equipment owning and operating costs over the long run.
Customer Support Agreements
Cat dealers offer a variety of product support agreements, and work with customers to develop a plan that best meets specific needs. These plans can cover the entire machine, including attachments, to help protect the customer's investment.
Operation
Improving operating techniques can boost your profits. Your Cat dealer has training videotapes, literature and other ideas to help you increase productivity.
Maintenance Services
Choose from your dealer's range of maintenance services when you purchase your machine. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as S•O•SSM and Coolant Sampling and Technical analysis help you avoid unscheduled repairs.
Replacement
Repair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.
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Standard Equipment
- Electrical
- 24-volt system
- 75 Amp alternator
- 2) 12-volt maintenance free, high CCA batteries
- alarm, back-up
- warning horn
- sealed electrical connectors
- color coded and numbered wires
- Guards
- Engine enclosures
- Ground access for daily service
- Engine fan guard
- Hinged radiator grill
- Integral underguards
- Front brush sweeps
- Operator Environment
- Air suspension seat
- Two pedal operation
- Rearview mirrors
- Tilt and telescoping steering wheel
- Cup holder
- Computer diagnostics and monitoring with three level information system
- Power Train
- Cat 3126 turbocharged and aftercooled engine
- Electric pre-heat for cold starting
- Multi-stage, dry centrifugal precleaner
- Two-stage radial seal filter air cleaner
- Radiator
- Blower radiator fan
- Coolant:
- Lock-up torque converter
- Five speed forward countershaft transmission
- Brakes: Service, Secondary, Parking
- Four-wheel enclosed wet disc hydraulic service brakes
- Inboard planetary final drives
- Front and rear differential locks, with isolated control system
- High capacity fuel tank
- Lubed for life driveline slipjoint and universal joints
- Variable flow-modulated 1/4 turn steering
- Muffler
- Hydraulics
- Closed center-load sensing system
- Variable displacement piston pump
- Full flow return line filter
- Other standard equipment
- Ecology drains on axles and engine
- Vandalism protection
- Cap locks - fuel tank, hydraulic tank, oil dipstick, oil filler
Optional Equipment
- Arch
- dual function
- single function
- cable skidding
- Decking blade
- narrow
- wide with bolt on edge
- Frame
- no fenders
- grapple fenders
- cable fenders
- Grapple
- 12.2 ft2/1.04 m2 bunching
- 12.5 ft2 / 1.16 m2 bunching
- 9.0 ft2 / .83 m3 sorting
- Lights
- four standard
- eight optional (twelve total)
- Operator environment
- open ROPS
- enclosed ROPS + AC
- Tires
- 24.5 x 32, 16 PR
- 30.5L x 32, 16 PR
- 35.5L x 32, 16 PR