®
®
525C
Wheel Skidder
Engine
Engine Model Cat®C7 ACERT™
Gross Power – SAE J1995 146 kW 196 hp
Dimensions
Wheelbase 3534 mm 139.2 in
Weights
Est Operating Weight 17 711 kg 39,045 lb
• Operating weight includes enclosed cab, 30.5 tires,
decking blade, arch, bunching grapple, winch
Grapple
Bunching Capacity 1.16 m
Thinning Capacity 1.34 m
2
2
12.5 ft
14.4 ft
2
2
525C Wheel Skidder
The 525C wheel skidder sets the standard for productivity and durability.
Engine
The Cat®C7 engine with ACERT™
✔
technology is field proven and U.S.
EPA Tier 3 compliant. The industry
leading Caterpillar®lock up torque
converter automatically engages/
disengages direct drive for maximum
efficiency, performance and productivity.
pg. 4
Serviceability
The 525C is designed to make regular
✔
maintenance easier, extend service
intervals, and reduce the time required
for maintenance. pg. 11
Power Train
The field-proven Cat torque converter,
heavy-duty transmission and high
performance axles improve availability,
performance and productivity, while
minimizing fuel consumption. pg. 5
Customer Support
Your Cat dealer offers support you can
count on, from purchase options to
operator training, maintenance programs
and unmatched parts availability … all
to keep your Cat skidder up and running
when you need it. pg. 12
Hydraulics
The state-of-the-art closed-center,
variable displacement, pressure
compensating hydraulic system
provides power for braking, steering,
blade and grapple functions. pg. 6
Engineered to exceed customer expectations
in the toughest applications. Caterpillar
quality, improved serviceability and
productivity provide maximum uptime
and lower owning and operating costs.
2
Structures
Operator Station
Work Tools
The 525C structures are Caterpillar
✔
designed and manufactured for the
most demanding logging conditions.
Durable box section mainframes and
decking blade provide superior strength.
pg. 7
Finger tip gear selection, 1/4 turn
✔
steering, improved ergonomic control
layout and reduced operator lever effort
contribute to the most comfortable
operator environment. pg. 8
Large Cat grapples maximize
✔
production with a new tong profile and
higher clamping forces. Raised edges
and wear resistant cast tips provide
added durability. The hydraulic winch
is ideal for self-retrieval and log truck
towing. pg. 10
✔ New Feature
3
Engine
The Cat power train delivers top performance, power, and durability.
Cat C7 Engine. The Cat C7 uses
Caterpillar’s breakthrough ACERT™
Technology to meet exhaust emission
reduction standards. It features efficient
air management, fuel delivery and
electronic control for high productivity
and exceptional service life.
Engine Design. This 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™ Technology. Caterpillar
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 Module. Controls the
fuel injector solenoids to monitor fuel
injection. This system provides automatic
altitude compensation, and it will not
allow the engine to fire until it has oil
pressure, acting as cold start protection
and a form of pre-lube.
Turbocharger. The 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.
Maintenance. The 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 Pump. A dual thermostat control
improves coolant flow and heat
dissipation, resulting in better durability.
Electronic Transfer Pump. The electric
fuel transfer pump is self-priming,
eliminating the need for a manual
priming pump.
Reliability Features. The C7 offers
maximum reliability and response
thanks to a range of features:
• Improved fuel injectors and pump
• Leak-free design
• Higher cylinder pressures
• Reinforced cylinder block
Leak-Free Design. Improved 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.
4
Power Train
The integrated Cat power train delivers dependable, relentless pulling power.
Five-Speed Transmission. The 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 Application. 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 Control.
The 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 Converter. The large, heavy-
duty 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 Productivity. The 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 Clutch. The 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-up. The 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 Costs. Torque
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 Locks. Normal 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.
Axles. Axles feature a full length oil sump
with splash lubrication for excellent
heat rejection and long component life.
The 525C is available with two axle
options – Standard Duty axles are used
for most applications and tire sizes up
to 30.5 ⳯ 32. A Wide Axle option is
available for use in moderate to severe
applications, or when using dual tires,
wide flotation tires or chains.
Front Axle. The front axle features a
pinion-mounted design and a heavy-duty
housing, eliminating the need for the
front axle guard.
Pivot Design. 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 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. They are
virtually maintenance free, and provide
reliable brake performance in the most
demanding logging applications.
5
Hydraulics
State-of-the-art hydraulic system provides dependable power and maximum efficiency.
Auto-Grab Feature. Auto-Grab,
engineered by Caterpillar, constantly
monitors tong pressure and adjusts as
needed to securely hold grapple loads
while skidding. It is easily activated
on demand by a switch located on the
right-hand control lever.
Load Sensing Hydraulics. A load
sensing variable displacement pump
and pressure compensating system
continually monitor hydraulic power
requirements, then provides power
based on demand.
Lower Power Consumption. The 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 Demands. Load 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 Cooler. The oil cooler is located
above the radiator for better hydraulic
oil cooling performance and to make
radiator cleanout easier.
Cat ToughGuard™ Hoses. Caterpillar
®
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.
Steering. Fully hydraulic control.
Meets the following standards:
SAE J1511 OCT90, ISO 5010-1992.
6
Structures
The 525C mainframe, hitch and decking blade are designed and built to surpass the
expectations of the logging industry.
Box-Section Construction. Caterpillar
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 525C.
Absorbs Twisting and Shock Loads.
Frames can absorb twisting and impact
forces to provide a sound foundation
and well-balanced system for the entire
structure.
Superior Balance. Low center of mass
and weight forward design create
excellent skidder balance.
Maneuverability. The 525C skidder
provides the tightest turning radius for
superior maneuverability while still
maintaining the excellent balance
required for high capacity skidding.
Caterpillar Manufacturing. The front
and rear frames are robotically welded
and manufactured by Caterpillar to
ensure the highest level of quality
and durability.
Hitch. A heavy-duty 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 Pins. The wide hitch pin spread
significantly reduces horizontal loading
on hitch 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.
Fenders. Rear frame fender options are
available for both grapple and cable
arrangements.
Arches and Booms. All Caterpillar
arches use box-section construction,
and are thoroughly tested to exceed
durability requirements.
Single Function Arch. This high strength
design is simple to operate and is ideally
suited for logging conditions where
maneuverability is not limited by ground
conditions. This arch is best suited for
use with the bunching head grapple.
Dual-Function Arch. The 525C is
available with a dual function arch and
compatible with a sorting or bunching
head. The dual-function arch offers
variable reach, which minimizes machine
maneuvering to pinpoint a load with the
grapple, and large grapple capacities.
Cable Arch. Allows outstanding line
skidding performance with a two-position
adjustable height fairlead to match site
conditions.
7
Operator Station
Easy to operate, fingertip controls, less fatigue
Sound Insulation. With 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 Mounting. The modular ROPS/FOPS
cab is resiliently mounted to the skidder
frame, reducing vibration for greater
comfort and a quieter ride.
Comfortable Work Station. The work
station incorporates years of cab design
innovations to maximize operator
comfort and productivity.
Air Suspension Seat. Standard 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 Cab. The 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 Conditioning. Standard with the
enclosed, pressurized cab, air conditioning
helps the operator concentrate on work
rather than environmental distractions.
A dedicated cab filter assures clean air.
Windows. Tough 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.
Machine Controls. The comfortable
operator environment uses ergonomically
designed and placed machine controls
to reduce fatigue and increase
productivity.
Steering. Column 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 Controls. Transmission
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.
8
Governor Pedal. The governor pedal is
located to the right for more clearance
between the brake pedal, and for
improved operator comfort.
Single-lever Grapple Control. A 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 Control. The 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 Switch. The Auto-Grab
system monitors and adjusts tong
pressure as needed to maintain a
secure grip on grapple loads.
Lock-up Torque Converter Drive.
When 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 Switch.
Ergonomically located rocker switch
allows quick engagement of differential
locks when needed.
Monitoring Controls. Conveniently
located and easy-to-see gauges and
displays make monitoring machine
systems as simple as possible.
Gauges. Four gauges indicate engine
coolant temperature, hydraulic oil
temperature, torque converter oil
temperature, engine rpm 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.
Additional. The 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/FOPS. FOPS (Falling Object
Protection) and ROPS (Roll-Over
Protection) guards offer protection
to the operator and the machine.
9
Work Tools
Move more wood with powerful, flexible Cat grapples and winches.
Reliable, Productive Grapples.
Caterpillar 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 Grapples. Bunching 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 Grapples. Thinning 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.
Sorting Grapples. Sorting head grapples
are designed primarily for use in skidding
larger, inconsistent diameter timber.
The “scissor” action of the tongs is well
suited for gathering individual logs.
Grapple Snubber. Reduces grapple
swing, hydraulic hose stress and
improves component life.
Flow Divider. The high capacity flow-
divider delivers reliable operation and
maintains consistent tong sequencing.
Hydraulic Winch. The 525C features
an 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 Winch. An 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.
Decking Blade. 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 electro-hydraulic
control improves operator comfort
and control of the decking blade.
• Heat-treated bolt-on edge and
• The 525 C is available with
maintenance-free pivot joints for
outstanding durability.
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.
10
Serviceability
Ease of service increases productivity.
SM
S•O•S
Provides a fast, convenient way to
gather uncontaminated fluid samples,
which improves analysis reliability.
Pressure Taps. Conveniently located
for easy access to hydraulic system
pressure measurements.
Spin-on Oil Filters. Simplify maintenance
processes and shorten downtime.
Electronic Transfer Pump. Delivers the
proper fuel flow to the fuel system and
eliminates manual priming.
Fluid Sampling Valves.
Quick-Access Engine Doors. Large,
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 Access. Most 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 Access. Steps and grab
irons are located on the rear frame and
cab for easier access to the rear frame,
arch and boom.
Bolt-on Guards. Bolt-on guards offer
protection to critical components,
and are easily removable for servicing.
Removable floor plates and side plates
allow access to components under
the cab.
Radial Seal Air Filters. Hand access
makes them easy to change, reducing
air filter maintenance times.
Extended Oil Service Intervals. A 500-
hour oil change interval reduces
downtime for service and lowers
maintenance costs.
Ecology Drains. All 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 Hoses. The grapple pilot lines,
pressure line and load-sense lines are
routed above the hitch and are bulkheaded
for easy hose replacement and fastest
service. The hitch hoses use the Cat
ToughGuard™ technology and have
excellent wear characteristics.
Electrical System. The 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 Systems.
The 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.
Radiator. Cleanout 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 Bearings. Matched
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.
11
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 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 Link. Product 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 technologybased 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 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 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 Services. Talk 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•SSMAnalysis and Coolant Sampling
and Technical Analysis help 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.
SAFETY.CAT.COM™.
12
Engine
Power Train
Engine Model Cat C7 ACERT™
Net Flywheel Power 136 kW 182 hp
Net Power – ISO 9249 136 kW 182 hp
Net Power – SAE J1349 136 kW 182 hp
Gross Power – SAE J1995 146 kW 196 hp
Displacement 7.2 L 439 in
3
Bore 110 mm 4.33 in
Stroke 127 mm 5 in
Number of Cylinders 6
Max Torque @ Rated Speed 896 N·m at 1,400 rpm
Derating Altitude 2285 m 7,500 ft
Air Cleaner Dry precleaner
Alternator 80 amp
Fan Speed 1,620 rpm
Fan Type Blower
Electrical System 24V
Battery – Quantity 2
Battery – Volts 12V
Battery – Capacity 950 CCA
Starting System Direct electric
• These ratings apply at 1,800 rpm when tested under the
specified standard conditions.
• Net power advertised is the power available at the flywheel
when the engine is equipped with fan, air cleaner, muffler
and alternator. No derating required up to 2285 m (7,500 ft)
altitude.
• Based on standard air conditions of 25° C (77° F) and 99 kPa
(29.32 in Hg) dry barometer. Used 35° API gravity fuel having
an LHV of 42 780 kJ/kg (18,390 BTU/lb) when used at 30° C
(86° F) [ref. A fuel density of 838.9 g/L (7.001 lb/gal)].
Travel Speed – Fwd. 1st 6.4 km/h 4 mph
Travel Speed – Fwd. 2nd 9 km/h 5.6 mph
Travel Speed – Fwd. 3rd 10.9 km/h 6.8 mph
Travel Speed – Fwd. 4th 15.3 km/h 9.5 mph
Travel Speed – Fwd. 5th 27.5 km/h 17.1 mph
Travel Speed – Rev. 1st 6.2 km/h 3.9 mph
Travel Speed – Rev. 2nd 10.5 km/h 6.5 mph
Travel Speed – Rev. 3rd 18.6 km/h 11.6 mph
Torque Converter – Type Lock-up clutch
Transmission 5 fwd/3 rev countershaft,
powershift
Transmission Cooler Type Plate
Steering, frame articulation ± 45°
Brakes – Service Type Single disc WET enclosed
Brakes – Parking Type Drum brake on rear output
of transmission drop box
Hydraulic System
Circuit Type Closed center,
variable flow
Pump Type Axial piston
Pump Output 174 L/min 46 gal/min
Relief Valve Setting 21 000 kPa 3,045 psi
Steering Valve Direct link, non-follow
Steering Cylinder – Bore 88.9 mm 3.5 in
Steering Cylinder – Stroke 437.5 mm 17.22 in
Steering Cylinder – Rod Diameter 50.8 mm 2 in
Dozer Valve Electro-hydraulic
Dozer Cylinder – Bore 101.6 mm 4 in
Dozer Cylinder – Stroke 470 mm 18.5 in
Dozer Cylinder – Rod Diameter 57.15 mm 2.25 in
Grapple Valve 4 or 5 stack, pilot
• Measured at 2,200 rpm.
Grapple
Bunching Capacity 1.16 m
Thinning Capacity 1.34 m
Sorting Capacity .83 m
525C Wheel Skidder specifications
2
2
2
12.5 ft
14.4 ft
2
9 ft
2
2
13
Winch – Grapple Skidder
Service Refill
Max Line Pull – Bare Drum 175 kN 39,342 lb
Max Line Speed 40.2 m/min 132 ft/min
Drum Capacity 19.0 mm (3/4 in) 47 m 154 ft
Drum Capacity 22.2 mm (7/8 in) 30 m 97 ft
Drum capacity 25.4 mm (1 in) 28 m 91 ft
Drum Diameter 229 mm 9 in
Drum Width 279 mm 11 in
Winch – Cable Skidder
Max Line Pull – Bare Drum 183.5 kN 41,270 lb
Max Line Speed 110 m/min 360 ft/min
Drum Capacity 19.0 mm (3/4 in) 45 m 148 ft
Drum Capacity 22.2 mm (7/8 in) 32 m 105 ft
Drum capacity 25.4 mm (1 in) 25 m 82 ft
Drum Diameter 254 mm 10 in
Drum Width 279 mm 11 in
Fuel Tank 315 L 83.2 gal
Cooling System 56.7 L 15 gal
Differential, Final Drive – Front 52 L 13.7 gal
Differential, Final Drive – Rear 52 L 13.7 gal
Engine Oil 27 L 7.1 gal
Transmission, Torque Converter 54 L 14.2 gal
Mechanical Winch 24.5 L 6.5 gal
Hydraulic System – Tank 54 L 14.3 gal
Hydraulic System – Total 112 L 29.6 gal
Weights
Est Operating Weight 17 711 kg 39,045 lb
• Operating weight includes enclosed cab, 30.5 tires, decking
blade, single arch, bunching grapple, winch.
14
525C Wheel Skidder specifications
1A
2
9
7
5A
3
4
8
6
10
12
11
9
7
5
3
4
8
1
2
Dimensions
Dimension
dual function 4103 mm (161.5 in)
single function 3760 mm (148 in)
2794 mm (110 in)
843 mm (33.2 in)
1798 mm (70.8 in)
3534 mm (139.2 in)
dual function 7626 mm (300.2 in)
single function 8369 mm (329.4 in)
6945 mm (273.4 in)
581 mm (22.9 in)
1381 mm (54.4 in)
456 mm (17.9 in)
3184 mm (125.4 in)
3138 mm (123.5 in)
2622 mm (103.2 in)
3398 mm (133.8 in)
6000 mm (236.2 in)
Cable
*With 30.5 x 32 tires
†
Add 188 mm (7.4 in) if equipped with optional lights or water tank
All dimensions are approximate
GrappleGrapple
†
Ground level to top boom (grapple)
Ground level to top roller (cable)
Ground level to axle center line*
Rear axle center line to pin
Wheel base
Overall length (grapple)
Overall length (cable)
Ground clearance
Decking blade lift height
Decking blade dig depth
Height to top of cab
Decking blade width
Tread width
Overall width
1
1A
2
3
4
5
5A
6
7
8
9
10
11
12
Turning radius over tires*
525C Wheel Skidder specifications
15
525C Arch
Single Function Dual Function
1 Lift highest, retracted 2212 mm (87.1 in) 2623 mm (103.3 in)
2 Lift highest, farthest x 1944 mm (76.5 in)
3 Lift maximum reach x 1336 mm (52.6 in)
4 Lift lowest, retracted x 752 mm (29.6 in)
5 Lift lowest, farthest 600 mm (23.6 in) 259 mm (10.2 in)
6 Loaded tire radius* 843 mm (33.2 in) 843 mm (33.2 in)
7 Reach highest, retracted 1630 mm (64.2 in) 1513 mm (59.6 in)
8 Reach lowest, retracted x 1469 mm (57.8 in)
9 Reach lowest, farthest 2521 mm (99.3 in) 2488 mm (98 in)
10 Reach highest, farthest x 2765 mm (108.9 in)
11 Reach maximum x 2880 mm (113.4 in)
*With 30.5 x 32 tires
Single Function
Dual Function
6
5
7
9
1
7
8
9
10
11
6
1
4
3
2
5
16
525C Wheel Skidder specifications
1
2
4
3
6
5
4
3
2
1
*Thinning grapple is intended only for use in thinning applications
525C Grapple — Continuous Rotation
Sorting Bunching Thinning*
1 Grapple capacity 0.83 m
2
(9 ft2) 1.16 m2 (12.5 ft2) 1.34 m2 (14.4 ft2)
2 Tip to tip height 2045 mm (80.5 in) 1920 mm (75.6 in) 1981 mm (78 in)
3 Tong opening 2540 mm (100 in) 3050 mm (120 in) 3124 mm (123 in)
4 Full open height 1590 mm (62.6 in) 1677 mm (66 in) 1832 mm (72.1 in)
5 Minimum stem diameter 76 mm (3 in) 155 mm (6 in) 190 mm (7.5 in)
6 Fully closed height 1829 mm (72 in) 1285 mm (50.6 in) 1371 mm (54 in)
Sorting Grapple
525C Wheel Skidder specifications
17
Standard Equipment
Standard equipment may vary. Consult your Caterpillar dealer for details.
Electrical
24V electrical system
Alarm, back-up
Alternator, 80 amp
Batteries, maintenance free (2-1000CCA)
Lighting system, exterior lights (4 total)
Main disconnect switch
Starter, electric, heavy duty
Starting and charging system
Diagnostic connector
Horn, warning
Operator Environment
12V accessory power port
Seat, air suspension
30° swivel, 3 position locking
Seat belt
Beverage holder
Cab, ROPS/FOPS certified
Computerized Monitoring System
Instrumentation, Gauges:
Engine coolant temperature
Fuel level
Hydraulic oil temperature
Tachometer
Torque converter oil temperature
Instrumentation, Warning Indicators:
Autograb
Brake oil pressure
Differential locks
Engine
Engine oil pressure
Lockup clutch
Parking brake
Primary steer pressure
Secondary steer pressure (if equipped)
Starting aid
System voltage
Transmission filter bypass
Winch freespool (if equipped)
Work lights
Instrumentation, Digital Data
Computerized diagnostics and monitoring
Engine rpm
Gear and direction
Odometer
Service hour meter
Headliner, Floormat, and Domelight
Mirror, rear view
Steering wheel, tilt and telescoping
Electronic transmission mounted controls
Power Train
Air cleaner, 2-stage with precleaner
Brakes
Parking
Service, four-wheel enclosed disc
Differential locks (front, rear)
Driveline slipjoint, lubed for life
Engine, Cat C7, ACERT Technology, ATAAC
Fan, blower
Filters, fuel/engine air, primary/secondary
Final drives, inboard planetary
Fuel transfer pump (electric)
Fuel tank, high capacity
Lock-up torque converter
Muffler
Radiator with clean-out doors
Steering, variable flow-modulated 1/4 turn
Transmission, countershaft powershift (5F/3R)
Universal joints, lubed for life
Hydraulics
Closed center-load sensing system
Hitch hoses, Caterpillar ToughGuard™
Line filter, full flow return
Hydraulic oil cooler, Spin-on filters
Variable displacement piston pump, 46 gal/min
(174.1 L/min)
Other standard equipment
Articulation lock link
Brush sweeps, front
Ecology drains (engine, hyd tank, axles, transmission)
Engine enclosures, hinged
Guards, hinged – bottom and radiator
SOSSMsampling ports
Vandalism protection, lockable doors and cap locks
18
525C Wheel Skidder specifications
Optional Equipment
Optional equipment may vary. Consult your Caterpillar dealer for details.
Power Train
Standard Gross Power – 146 kW (196 hp)
Dual Gross Power
1st gear – 146 kW (196 hp)
2nd-5th gears – 163 kW (218 hp)
Arch
Dual function
Single function
Cable skidding
Industrial arrangement
Axles
Heavy duty (wide tire/chains)
Standard duty
Blade
Narrow decking
Wide decking
Extended decking
Cab, enclosed, with window screens
ROPS, open
ROPS, enclosed with heat/AC
Window screens
Wipers, front and rear
Electrical
Converter, high capacity 12V, 10A continuous, 15A peak
Jump start receptacle
Fenders, heavy duty
Grapples – Cat Continuous Rotation
Bunching
Sorting
Thinning
Lights
Additional 8 (2 front, 2 rear, 2 per side)
Pre-cleaner, turbine
Starting aid package, cold weather
Steering, secondary
Tires and Tubes, set of four, logger (LS-2)
30.5L-32, 20PR
30.5L-32, 26PR
35.5L-32, 20PR
35.5L-32, 26PR
Dual ring capable
Narrow overall width options
Water tank
Winch
Grapple
Cable skidding
525C Wheel Skidder specifications
19
525C Wheel Skidder
AEHQ5670-01 (02-10)
Replaces AEHQ5670
For more complete information on Cat products, dealer services,
and industry solutions, visit us on the web at www.cat.com
© 2010 Caterpillar
All Rights Reserved
Printed in U.S.A.
Materials and specifications are subject to change without notice.
Featured machines in photos may include additional equipment.
See your Caterpillar dealer for available options.
CAT, CATERPILLAR, SAFETY.CAT.COM, their respective logos, ACERT, ToughGuard,
“Caterpillar Yellow” and the “Power Edge” trade dress, as well as corporate and product
identity used herein, are trademarks of Caterpillar and may not be used without permission.
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