The 535B Skidder is built to exceed all expectations for skidding performance, reliability and comfort, while maximizing productivity.

Net Flywheel Power 180.0 hp
Engine Model Cat® 3126 DITA
Net Power - ISO 9249 180.0 hp
Net Power - SAE J1349 180.0 hp
Gross Power - SAE J1995 200.0 hp
Governed Speed at Rated Power 2200.0 RPM
Displacement 441.78 in3
Bore 4.33 in
Stroke 5.0 in
Torque Rise 61%
Max Torque @ Rated Speed 937.4 Nm @ 1400rpm
Derating Altitude 10663.0 ft
Air Cleaner dry centrifugal precleaner
Alternator 75 Amp
Fan Speed 1909.0 RPM
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

Wheelbase 139.1 in
Length 241.62 in
Overall width 133.3 in
Height 127.3 in
Ground Clearance 22.9 in

Est Operating Weight 41900.0 lb

Bunching Capacity 14.4 ft2
Thinning Capacity 16.6 ft2
Sorting Capacity 13.2 ft2
Bunching - Full Open Height 72.0 in
Bunching - Fully Closed Height 48.0 in
Bunching - Min. Stem Diameter 5.9 in
Bunching - Tip to Tip Height 81.4 in
Bunching - Tong Opening 123.0 in
Sorting - Full Open Height 62.5 in
Sorting - Fully Closed Height 74.0 in
Sorting - Minimum Stem Diameter 3.0 in
Sorting - Tip to Tip Height 91.5 in
Sorting - Tong Opening 104.0 in
Thinning - Tip to Tip Height 85.5 in
Thinning - Tong Opening 127.0 in
Thinning - Full Open Height 75.9 in
Thinning - Min. Stem Diameter 5.4 in
Thinning - Fully Closed Height 47.9 in

Service Refill
Fuel Tank 83.16 gal
Cooling System 13.2 gal
Differential, Final Drive - Front 13.73 gal
Differential, Final Drive - Rear 13.73 gal
Engine Oil 7.13 gal
Transmission, Torque Converter 14.26 gal
Mechanical Winch 6.47 gal
Hydraulic System - Tank 16.5 gal
Hydraulic System - Total 32.47 gal

Power Train
Travel Speed - Fwd. 1st 3.95 mph
Travel Speed - Fwd. 2nd 5.55 mph
Travel Speed - Fwd. 3rd 6.75 mph
Travel Speed - Fwd. 4th 9.49 mph
Travel Speed - Fwd. 5th 17.1 mph
Travel Speed - Rev. 1st 3.84 mph
Travel Speed - Rev. 2nd 6.5 mph
Travel Speed - Rev. 3rd 11.55 mph
Max Drawbar Pull 41350.0 lb
Torque Converter - Model 3310 Lock-up
Torque Converter - Type Lock-up, single stage
Transmission Countershaft-5 fw/3 rev
Steering, frame articulation hydraulic
Brakes - Service Type hydraulic, encl. wet disc
Brakes - Parking Type drum
Transmission Cooler Type plate

Hydraulic System
Circuit Type Closed cntr load sensing
Pump Type Axial piston
Pump Output 50.0 gal/min
Relief Valve Setting 3045.0 psi
Reservoir Tank Capacity 16.5 gal
Steering Valve dir. linkage, non follow-up
Steering Cylinder - Bore 2.97 in
Steering Cylinder - Stroke 17.02 in
Steering Cylinder - Rod Diameter 1.73 in
Dozer Valve direct linkage
Dozer Cylinder - Bore 3.96 in
Dozer Cylinder - Stroke 18.33 in
Dozer Cylinder - Rod Diameter 2.23 in
Grapple Valve 3-4 stack, pilot control

Dual Function - Lift highest, retracted 104.1 in
Dual Function - Lift highest, farthest 68.0 in
Dual Function - Lift max reach 41.31 in
Dual Function - Lift lowest, retracted 40.3 in
Dual Function - Lift lowest, farthest 110.8 in
Dual Function - Reach Highest, Retracted 52.4 in
Dual Function - Reach Lowest, Retracted 62.2 in
Dual Function - Reach Lowest, Farthest 110.8 in
Dual Function - Reach Highest, Farthest 108.0 in
Dual Function - Reach Max 113.8 in

Winch - Grapple Skidder
Max Line Pull - Bare Drum 43900.0 lb
Max Line Speed 324.0 ft/min
Drum Capacity 19.0mm (3/4in) 148.0 ft
Drum Capacity 22.2mm (7/8in) 106.0 ft
Drum capacity 25.4mm (1in) 82.0 ft
Drum Diameter 10.0 in
Drum Width 6.7 in

Power Train
The 535B Skidder combines the Cat 3126 DITA engine and torque converter/direct drive for relentless pulling power.

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, speed and improved skidding performance.

Five-Speed Transmission
The Cat powershift countershaft transmission easily matches engine power to the load size and ground conditions.
  • Gears 1 and 2 provide industry leading pull capability for heavy load and steep grade applications.
  • Gear 3 is for lighter loads and higher speed operations
  • Gears 4 and 5 provide excellent empty return speeds to maximize productivity.

Differential Locks
Hydraulically engaged differential locks in both axles significantly expand the operating range of the 535B. 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.

State-of-the-art hydraulic system contributes to system efficiency and operational ease and productivity.

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.

Auto-Grab Feature
Constantly monitors and adjusts tong pressure as needed to securely hold loads in the grapple. Like the load sensing hydraulic system, Auto-Grab places demand on engine horsepower only when the system senses a change in the load that requires an increase in tong pressure. It is easily activated on demand by the tong close switch located on the right hand control lever. Tractor operation is much easier, constant tong pressure is maintained, and operating costs are reduced through greater fuel efficiency and less time spent re-gripping slipped loads.

The 535B 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.

Cat Hoses
Caterpillar hose technology allows high pressures for maximum power and reduced downtime, and intelligent routing minimizes exposure to damage.

Fully hydraulic control. Meets the following standards: SAE J1511/ISO 5010 FEB94, ISO 5010-1992

State-of-the-art engineering of rugged undercarriage components and systems for the 535B wheel skidder sets the industry standard for reliability and durability.

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 provides 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 delivers 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 535B axle is capable of single or dual wheels. Dual (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.

The 535B mainframe, hitch and decking blade are designed and built to surpass the expectations of the logging industry.

Box-Section Construction
The 535B 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.

The bottom hitch has a double tapered roller bearing for improved load distribution, which reduces flexing stress and maintains tight joints.

The 535B dual-function arch and the cable arch are designed and tested to exceed durability requirements.

Durable, high capacity sorting and bunching grapples are matched to machine size and horsepower for optimum performance.

The 535B winch attachment delivers the power and durability ideal for log truck towing, self-retrieval and log skidding.

Roll-Over Protection and Falling Object Protection guards offer protection to the operator and the machine. Meets standards: ISO 8082 2003, ISO 8083 1989, and ISO 8084 2003

Application Flexibility
The 535B Wheel Skidder can easily handle the variety of tasks for today's loggers.

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 lockup torque converter offers the advantages of a direct drive transmission (speed and efficiency), with the ease of operating a torque converter drive (meaning less shifting). A computer senses load conditions and automatically switches from torque converter drive to direct drive for the highest possible operating speed.

Cradle Oscillation
For the ultimate in skidder flexibility the 535B is available with cradle oscillation, which isolates the cab from axle movement.

The 535B skidder has a wider, longer wheelbase to handle dual-function arch and large capacity bunching grapples.

Dual-Function Arch
Offers variable reach and large grapple capacities, well suited for large bundles of small stems.

Cat Continuous Rotation Grapples
With 360° rotation the Cat continuous rotation (CCR) grapples can easily get into position to gather stems. Grapple repositioning is reduced, saving valuable time and increasing production.

Cable Arch
Allows outstanding line skidding performance with a two position adjustable height fairlead to match site conditions.

Decking Blade
Efficiently clears landings and roads, and maintains stockpiles.

Tire Options
Expanded tire options allow the 535B to maintain outstanding skidding performance in a wide range of ground conditions.

The standard axle on the 535B is capable of using dual or flotation tires. Dual wheels increase flotation in poor underfoot conditions, and improve stability, especially when hauling large loads on a grade.

Light Options
Expanded light options allow the 545 to maintain skidding performance and productivity at any hour.

The most serviceable machines from the most committed dealers.

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.

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 to provide easy access to hydraulic system pressure measurements.

Ecology Drains
Located on the axle and hydraulic tank to make regular maintenance easier, and protect the environment from accidental oil spills.

Electrical System
24-volt electrical system delivers plenty of 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.

Operator Station
Designed for operator comfort and ease of operation for maximum productivity.

Operator Station

Comfortable, Efficient Operation
Controls and operator needs are integrated to create a highly productive work station.

Steering Column
Tilts and telescopes, and incorporates controls for transmission direction and range selection for maximum convenience and productivity.

Steering Articulation
Full 90 degree steering articulation, stop-to-stop with about one quarter wheel rotation, provides excellent maneuverability and productivity.

Transmission Controls
Transmission controls for forward, reverse and gear range are located on the steering wheel for easy fingertip control.

Single-lever Grapple Control
A single four-function lever controls all grapple and tong functions for simplified operation and reduced operator effort.

Decking Blade Control
Excellent modulation and precise control for various decking and clearing functions.

Auto-Grab Switch
System monitors and adjusts tong pressure as needed to maintain a secure grip on grapple loads.

Lock-up Torque Converter Drive
Selection switch and engagement indicator light helps operator match transmission speed range to skidding requirements.

Differential Lock Switch
Ergonomically located rocker switch allows quick engagement of differential locks when needed.

Analog Gauges
Four gauges indicate engine coolant temperature, hydraulic oil temperature, transmission oil temperature and fuel level.

Caterpillar Monitoring System
Monitors fuel, temperatures, vital electrical systems, gear speed and direction. A three level warning system alerts the operator of potential problems.

Air Suspension Seat
Standard air suspension seat swivels 30 degrees to the right for maximum comfort.

Sealed Cab
Sealed and pressurized for efficient heating and cooling, and for keeping out dust, fumes and insects.

Standard with enclosed cab attachment.

Large polycarbonate windows protect the operator and allow an excellent side and rear view. Sliding glass windows protected by metal screens in both doors provide fresh air and communication outside the machine.

Cab Mounting
The modular ROPS/FOPS cab is resiliently mounted to the skidder frame to reduce vibration.

Sound Insulation
Ample sound insulation reduces sound levels and boosts operator comfort.

Pre-wired for an entertainment radio, with two speakers, an antenna and standard built-in 24-to- 12-volt converter. The machine is fitted with on-off key switch engine operation, and a 12-volt power port for a cell phone. Optional: hi-amp 12V converter to power a communications radio.

Customer Support
Cat dealer services help you operate longer with lower costs.

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 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.

Look past initial price. Consider the financing options available as well as day-to-day operating costs. This is also the time to look at dealer services that can be included in the cost of the machine to 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.

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.

Repair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.

Standard Equipment

  • Direct electric 24-volt starting
  • 75 Amp alternator
  • 2) 12-volt maintenance free, 950 CCA batteries
  • alarm, back-up
  • pre-wired for rear grapple lights
  • dozer cylinders
  • fan
  • 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, dome light, floor mat
  • computer diagnostics and monitoring with three level warning system
  • Controls and gauge package
  • Gauges/indicators/lights
Power Train
  • Cat 3126 turbocharged and aftercooled engine
  • Air cleaner, 2-stage with precleaner
  • blower fan
  • engine enclosures (perforated)
  • differential lock axles (front, rear)
  • 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
  • high capacity fuel tank
  • lubed for life driveline slipjoint and universal joints
  • variable flow-modulated 1/4 turn steering
  • muffler
  • closed center-load sensing system
  • variable displacement piston pump
  • full flow return line filter
Other Standard Equipment
  • ecology drains on axles and hydraulic tank
  • vandalism protection: lockable doors on hydraulic tank, oil dipstick, oil filler
  • cap locks - fuel tank
  • indicators:
  • lighting system, halogen

Optional Equipment

alternator - 100 Amp
  • dual function
  • cable skidding
cold weather starting aid package
Decking blade
  • narrow
  • wide with bolt on edge
enclosed cab window screens
  • no fenders
  • standard fenders
  • heavy duty fenders
winch arrangement
  • 14.4 ft2/1.34 m2 bunching
  • 16.6 ft2/1.54 m2 thinning
  • Continuous rotation grapple
  • four standard
  • eight optional (twelve total)
axle for wide tires
Operator environment
  • open ROPS
  • enclosed ROPS + AC
  • 30.5L x 32, 16 PR
  • 35.5L x 32, 16 PR
  • duals
Hi-capacity 12V converter
  • 10A continuous, 15A peak output
water tank



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