The Cat power train delivers top performance, power, and durability.
Cat C7 EngineThe Cat C7 uses Caterpillar's breakthrough ACERT™ Technology to meet EPA Tier 3 exhaust emission reduction standards by using advanced technology in the air and fuel systems, and integrated electronics. It features efficient air management, fuel delivery and electronic control for high productivity and exceptional service life.
Engine DesignThis four-stroke engine provides efficient fuel combustion. Precise engineering and thorough testing assure durability, reliability and plenty of power. Built-in serviceability and excellent fuel economy lower operating costs.
ACERT™ TechnologyCaterpillar optimizes engine performance while meeting EPA Tier 3 regulations. ACERT™ Technology reduces emissions during the combustion process by using advanced technology in the air and fuel systems, in conjunction with integrated electronics. Caterpillar meets emission regulations at the combustion source rather than recycling exhaust gases.
ADEM A4 Control ModuleControls the fuel injector solenoids to monitor fuel injection, provides automatic altitude compensation, air filter restriction indication and acts as cold start protection and a form of pre-lube.
TurbochargerThe C7 features a waste gate turbocharger that provides high boost over a wider range, improving engine response and peak torque, as well as providing outstanding low-end performance.
MaintenanceThe C7 engine reduces costs and downtime with a 500-hour oil change interval. Extended service intervals can save thousands of dollars over the life of a machine. Machines are equipped with Caterpillar high efficiency oil filters, whose revolutionary design doubles efficiency without increasing the change interval.
Water PumpA dual thermostat control improves coolant flow and heat dissipation, resulting in better durability.
Electronic Transfer PumpThe electric fuel transfer pump is self-priming, eliminating the need for a manual priming pump.
The C7 offers maximum reliability and response thanks to a range of features:
- Improved fuel injectors and pump
- Improved joints reduce leaks
- Higher cylinder pressures
- Reinforced cylinder block
Leak-Free DesignImproved joints throughout the engine reduce the chance of leaks. The oil pan seal, timing cover and block to flywheel housing incorporate a leak-free design proven in thousands of Cat on-highway truck engines in the field.
The integrated Cat power train delivers dependable, relentless pulling power.
Five-Speed TransmissionThe field proven Cat power shift countershaft transmission easily matches engine power to the load size and ground conditions. Electronic control makes fingertip controls possible, reducing operator fatigue and improving comfort.
Gear ratios are carefully designed to maximize productivity in specific cycle segments and under specific loads.
- Gear 1 provides highest rimpull capability for heavy load applications.
- Gears 2, 3 for normal loads and higher speed operations.
- Gears 4, 5 provide excellent empty return and roading speeds.
Electronic Clutch Pressure ControlThe C-Series Skidders have an additional transmission feature for added performance and operator comfort - The Electronic Clutch Pressure Control (ECPC). This unique feature provides smoother shifting and increases skidding performance by regulating and modulating the individual clutches based on current operating conditions.
Torque ConverterThe large, heavyduty torque converter maximizes the productivity of the entire drive train. The torque converter is matched to the Cat C7 engine for excellent rimpull and skidding performance. This lock-up torque converter has proven its durability over thousands of hours of punishing loads.
Improved ProductivityThe torque multiplication capability of the torque converter reduces the need for the operator to continually shift the transmission to maintain good skidder performance, as is required on competitive skidders. This reduces operator effort and improves machine productivity.
Lock-up ClutchThe integral lock-up clutch allows the machine to operate in converter drive for greater rimpull, or direct drive for high efficiency hauling and faster travel speeds. Direct drive capability allows up to 15% higher travel speeds when the lock-up clutch is engaged.
Auto Lock-upThe lock-up clutch automatically engages according to ground speed and engine speed conditions. This feature is handled electronically and allows for increased travel speeds in the same gear.
Reduced Operating CostsTorque converter direct drive capability, combined with the lock-up differential, reduces wheel slip. This minimizes rutting and soil damage in straightahead pulls on weaker soil. In turn, it minimizes tire wear, component stress and fuel consumption, reducing total operating costs.
Differential LocksNormal operation is with the differential locks in both axles disengaged, meaning the all four wheels are free to drive independently. Locking a differential forces both wheels on an axle to turn in sync with each other. Both front and rear differential locks are easily engaged and disengaged with a conveniently located switch on the right hand console. Hydraulically actuated differential locks allow for on-the-go engagement or disengagement.
AxlesAxles feature a full length oil sump with splash lubrication for excellent heat rejection & long component life. The 535C has Wide Axles as standard for use in all applications from moderate to severe, or when using dual tires, wide flotation tires or chains.
Front AxleThe front axle features a pinion-mounted design and a heavy-duty housing, eliminating the need for a front axle guard.
The oscillation pivot design provides industry leading ride comfort.
- 15° oscillation absorbs minor shock loads caused by stumps and holes, and helps isolate the cab from axle movement for a smoother, more comfortable ride.
- Front axle oscillation also provides excellent fore-aft stability for large capacity grapples and dual function arches.
Brake ComponentsBrake 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.
State-of-the-art system provides dependable power and maximum efficiency.
Load Sensing HydraulicsA load sensing variable displacement pump and pressure compensating system continually monitor requirements and provide on-demand power.
Lower Power ConsumptionThe variable displacement hydraulic pump draws engine power only when braking, steering, dozer or grapple actuation demands flow or pressure. This conserves engine horsepower and increases fuel efficiency.
Cooling DemandsLoad sensing hydraulics provide flow only when needed, saving fuel and generating less heat, allowing the cooling system to allocate more capacity to the engine, transmission and torque converter.
Oil CoolerThe oil cooler is located above the radiator for better hydraulic oil cooling performance and to make radiator cleanout easier.
Auto-Grab FeatureAuto-Grab, engineered by Caterpillar, constantly monitors tong pressure and adjusts as needed to securely hold grapple loads while skidding.
Cat ToughGuard™ HosesCaterpillar XT®-3 ToughGuard™ hoses improve hose life in the grapple, arch, boom and across the hitch. ToughGuard hoses have been very successful in reducing early hour hose failures. O-ring face seals assure rock-solid connections that maintain pressure and reduce oil leaks.
SteeringFully hydraulic control. Meets the following standards: SAE J1511 OCT90, ISO 5010-1992.
The 535C mainframe, hitch and decking blade are designed and built to surpass the expectations of the logging industry.
Box-Section Construction and Superior Hitch DesignCaterpillar designed and manufactured box section structures set the industry standard for reliable, durable main frames. Extensive computer analysis and field-testing resulted in the design of the 535C.
Absorbs Twisting and Shock LoadsFrames can absorb twisting and impact forces to provide a sound foundation and well-balanced system for the entire structure.
Superior BalanceLow center of mass and weight forward design create excellent skidder balance.
ManeuverabilityThe 535C skidder provides the tightest turning radius for superior maneuverability while still maintaining the excellent balance required for high capacity skidding.
Caterpillar ManufacturingThe front and rear frames are robotically welded and manufactured by Caterpillar to ensure the highest level of quality and durability.
HitchA larger and improved center section features oversized plates and bosses to disperse forces. A large double-tapered roller bearing is used on the lower hitch for reduced flexing stress and maintaining tight joints.
Hitch PinsThe wide hitch pin spread significantly reduces horizontal loading on hinge pins and bearings for greater durability and extended pin and bearing life. The extra room also increases hydraulic hose clearance and makes hose routing easier.
FendersRear frame fender options are available for both grapple and cable arrangements.
Arches and BoomsAll Caterpillar arches use box-section construction, and are thoroughly tested to exceed durability requirements.
Dual-Function ArchThe 535C is available with a multiple position, dual-function arch. It accommodates large capacity grapples, well suited for large bundles of small stems, and difficult-to reach pre-bunched stems. The dual-function arch offers variable reach, which minimizes machine maneuvering to pinpoint a load with the grapple. In addition, it offers the ability to push the skidder forward if necessary.
Cable ArchAllows outstanding line skidding performance with a two-position adjustable height fairlead to match site conditions.
Easy to operate, fingertip controls, less fatigue
Comfortable Work StationThe work station incorporates years of cab design innovations to maximize operator comfort and productivity.
Air Suspension SeatStandard air suspension seat swivels 30° to the right for maximum comfort, while allowing the operator to observe skidder and grapple operations to the rear.
Sealed CabThe pressurized cab is sealed from exterior air (with windows closed) for efficient heating and cooling. Tight door and window casings also keep out dust, fumes and insects.
Air ConditioningStandard with the enclosed, pressurized cab, air conditioning helps the operator concentrate on work rather than environmental distractions. A dedicated cab filter assures clean air.
WindowsTough polycarbonate windows protect the operator, and are large enough for an excellent side and rear view, increasing operator confidence and productivity. Sliding glass windows protected by metal screens in both doors provide fresh air and communication outside the machine.
Sound InsulationWith the optional enclosed cab, ample sound insulation keeps interior sound levels low. Reduced sound levels meet operator environment regulations and significantly boost operator comfort, especially on long shifts.
Cab MountingThe modular ROPS/FOPS cab is resiliently mounted to the skidder frame, reducing vibration for greater comfort and a quieter ride.
Machine ControlsThe comfortable operator environment uses ergonomically designed and placed machine controls to reduce fatigue and increase productivity.
SteeringColumn tilts and telescopes to fit any size operator. The quarter-turn steering wheel quickly and accurately controls 90 degrees of machine articulation delivering excellent maneuverability and productivity.
Transmission ControlsTransmission controls for forward, reverse and gear range are located on the steering wheel for easy fingertip control. The operator can control machine functions with minimal effort, allowing greater concentration on skidding operations. The result is higher productivity and reduced operator fatigue.
Governor PedalThe governor pedal is located to the right for more clearance between the brake pedal, and for improved operator comfort.
Single-lever Grapple ControlA single four-function joystick control has top mounted switches for grapple open and close, tong rotate, and Auto-Grab System activation. The control is simple, convenient and easy to use.
Decking Blade ControlThe decking blade control is located on the right side console. This location provides for precise control for various decking and clearing functions while reducing operator fatigue.
Auto-Grab SwitchThe Auto-Grab system monitors and adjusts tong pressure as needed to maintain a secure grip on grapple loads.
Lock-up Torque Converter DriveWhen activated by a switch on the main dashboard, the machine will automatically switch between operation in fuel efficient direct drive mode or torque converter drive for maximum rimpull in tough skidding applications.
Differential Lock SwitchErgonomically located rocker switch allows quick engagement of differential locks when needed.
Monitoring ControlsConveniently located and easy-to-see gauges and displays make monitoring machine systems as simple as possible.
GaugesFour gauges indicate engine coolant temperature, hydraulic oil temperature, torque converter oil temperature, engine rpm and fuel level.
Caterpillar Monitoring SystemMonitors fuel, temperatures, vital electrical systems, gear speed and direction. A three-level warning system alerts the operator of potential problems.
AdditionalThe right hand console has a standard 12V outlet for powering auxiliary equipment. The cab is prewired and fitted for an entertainment radio, and a CB type 2-way radio.
ROPS/FOPSFOPS (Falling Object Protection) and ROPS (Roll-Over Protection) guards offer protection to the operator and the machine.
Move more wood with powerful, flexible Cat grapples and winches.
Reliable, Productive GrapplesCaterpillar designed and manufactured grapples use box section construction for ultimate durability. The tong curvature reduces the time it takes to bundle the load, and higher clamp forces deliver excellent load retention for secure hauls to the landing.
Bunching GrapplesBunching grapples are designed for harvesting mid-to-large diameter trees, usually felled by a mechanical feller buncher. Its large tong opening is designed to gather a large number of these stems per cycle for maximum loading. It is heavier than the sorting grapple, but its large capacity holds more stems for improved production in smaller trees and large loads.
Thinning GrapplesThinning grapples are designed for harvesting small diameter trees, usually felled by a mechanical feller buncher. Its large tong opening is designed to gather a large number of these small stems per cycle for maximum loading. Cat grapples offer large capacity for maximum performance and productivity.
Grapple SnubbersReduces grapple swing, hydraulic hose stress and improves component life.
Flow DividerThe high capacity flow divider delivers reliable operation and maintains consistent tong sequencing.
Hydraulic WinchThe 535C features a new electronically controlled hydraulic winch for grapple applications, replacing the mechanical winch. The hydraulic winch improves application flexibility by allowing the tractive effort to be used while winching, and eliminating the continuously rotating driveshaft. The high capacity winch has four function controls: reel-in, reel-out, brake-on, and free-spool. This winch is driven and controlled by the main implement hydraulic system.
Cable WinchAn electro-hydraulic lever controls the winch hydraulic control valve, located on the winch case. The integrated software electronically protects free-spool clutches. The C-500 mechanical winch is available on cable skidders where higher line speeds and max drum pull are important. Winch sump oil is used for hydraulic control and lubrication.
The decking blade efficiently clears landings and roads, and maintains log decks. It features box section steel arms for superior strength and durability. Decking blade pusharms are mounted directly to the mainframe for excellent strength, and set lower and forward for efficient clearing of slash and debris as well as log deck maintenance. The new electro-hydraulic control improves operator comfort and control of the decking blade.
- Heat-treated bolt-on edge and maintenance-free pivot joints for outstanding durability.
- The 535C is available with four blade options to allow it to be customized to many different types of operating conditions:
- No Blade - for industrial applications. - Narrow Decking - 85" width for general purpose applications. - Wide Decking - 105.4" width with bolt-on cutting edges - for improved coverage of tires and high decking blade usage. - Extended Decking - 123.5" width with bolt-on cutting edges - for the fullest coverage of tires and high decking blade usage.
Ease of service increases productivity.
Quick-Access Engine DoorsLarge, hinged engine enclosure doors make regular maintenance as easy and fast as possible. Easy access to daily service points increases the likelihood that maintenance will be done, and increases machine service life. In addition, less maintenance time means more working time and greater productivity.
Ground Level AccessMost filters and lube points are accessible from the ground without special tools. Remote lubrication points make daily attention to hard-to-reach joints easy.
Rear Frame AccessSteps and grab irons are located on the rear frame and cab for easier access to the rear frame, arch and boom.
Bolt-on GuardsBolt-on guards offer protection to critical components, and are easily removable for servicing. Removable floor plates and side plate allow access to components under the cab.
Radial Seal Air FiltersHand access makes them easy to change, reducing air filter maintenance times.
Extended Oil Service IntervalsA 500-hour oil change interval reduces downtime for service and lowers maintenance costs.
S•O•SSM Fluid Sampling ValvesProvides a fast, convenient way to gather uncontaminated fluid samples, which improves analysis reliability.
Pressure TapsConveniently located for easy access to hydraulic system pressure measurements.
Spin-on Oil FiltersSimplify maintenance processes and shorten downtime.
Electronic Transfer PumpDelivers the proper fuel flow to the fuel system and eliminates manual priming.
Ecology DrainsAll major fluid compartments (hydraulic tank, engine oil pan, radiator, axles and transmission) incorporate ecology drains to make regular maintenance easier, and protect the environment from accidental oil spills.
Hitch HosesThe grapple pilot lines, pressure line and load sense lines are routed above the hitch and are bulk-headed for easy hose replacement and fastest service. The hitch hoses use the Cat ToughGuard™ technology and have excellent wear characteristics.
Electrical SystemThe 24V electrical system delivers dependable electrical power for engine cranking, additional lighting, and engine diagnostics. Wiring circuits are color coded, numbered and protected by circuit breakers.
On-Board Diagnostic SystemsThe Caterpillar Monitoring System continuously checks all critical machine functions and components, and helps locate faults quickly for faster repair. Extremes are recorded, including fluid temperatures, engine speed and electrical system events.
RadiatorCleanout access doors located on both sides of the radiator help make radiator cleanout faster. The radiator features an all aluminum construction with 8 fins per inch for easy cleanout.
Matched Set Hitch BearingsMatched set bearings come pre-assembled with the correct pre-load from the supplier to streamline the assembly process and ensure a quality hitch joint every time. No rolling torque measurement is required, so the assembly process is simplified. Matched set bearings also reduce service time in the field.
Cat dealer services help you operate longer with lower costs.
Product SupportYou will find nearly all parts at our dealer parts counter. Cat dealers use a worldwide 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 substantial cost savings.
Product LinkProduct Link enables convenient monitoring of important equipment information remotely to help increase productivity and reduce owning and operating costs. This state-of-the-art satellite technology-based Product Link system enables Caterpillar dealers and customers to keep in touch with their machines. The system provides a two-way information flow between machine on-board systems and Caterpillar dealers/customers via the Cat Dealer Website and EquipmentManager. Through the subscriptions to Asset Watch (hours, location, time and geo-fence), Maintenance Watch (preventative maintenance, repair scheduling, parts ordering), and Health Watch (event and diagnostic codes, fuel consumption) the customer can manage their entire fleet.
Machine SelectionMake 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.
PurchaseLook 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 AgreementsCat 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.
OperationImproving operating techniques can boost your profits. Your Cat dealer has videotapes, literature and other ideas to help you increase productivity, and Caterpillar offers certified operator training classes to help maximize the return on your machine investment.
Maintenance ServicesTalk to your dealer about the range of available maintenance services. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as S•O•SSM Analysis and Coolant Sampling and Technical Analysis help avoid unscheduled repairs.
ReplacementRepair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.