525D Wheel Skidder

Overview
Gross Power
203 hp
Fuel Tank
83 gal
Displacement
428 in3
  • Exterior View
  • Interior View

Building on Caterpillar’s 40+ years’ experience designing and manufacturing skidders, the Cat® D Series Wheel Skidder delivers more productivity at lower operating cost. Get more wood to the landing faster in a stable machine with a roomy, comfortable environment for the operator. Advanced hydraulics speed up multi-functioning and cycle times and give you more lift capacity. The D Series runs cool and is designed to keep debris from collecting inside the machine. Tilting cab and other access points cut the time needed for daily maintenance and servicing.

Engine

Gross Power
203 hp
Displacement
428 in3
Bore
4 in
Stroke
5 in
Derating Altitude
9,843 ft
Number of Cylinders
6
Engine Model
Cat C7.1 ACERT™
Maximum Torque at Rated Speed
922 N-m at 1,400 RPM
Electrical System
24V
Battery Quantity
2
Battery - Volts
12V
Battery Capacity
950 CCA
Gross Power
203 HP
Displacement
428 in³
Bore
4 in
Stroke
5 in
Derating Altitude
9,843 ft
Number of Cylinders
6
Engine Model
Cat C7.1 ACERT™

Service Refill

Fuel Tank
83 gal
Cooling System
15 gal
Engine Oil
7 gal
DEF Tank
5 gal
Transmission - Torque Converter
14 gal (US)
Parking Brake
14 oz
Differential - Final Drives - Front
14 gal (US)
Differential - Final Drives - Rear
14 gal (US)
Differential - Final Drives - Tank
17 gal (US)
Differential - Final Drives - Total
33 gal (US)
Fuel Tank
83 gal (US)
Cooling System
15 gal (US)
Engine Oil
7 gal (US)
DEF Tank
5 gal (US)

Power Train

Transmission
Countershaft Powershift
Transmission Cooler Type
Water to Oil
Travel Speed - Forward 1
4 mile/h
Travel Speed - Forward 2
5 mile/h
Travel Speed - Forward 3
7 mile/h
Travel Speed - Forward 4
9 mile/h
Travel Speed - Forward 5
12 mile/h
Travel Speed - Forward 6
12 mile/h
Travel Speed - Reverse 1
4 mile/h
Travel Speed - Reverse 2
7 mile/h
Travel Speed - Reverse 3
12 mile/h
Transmission
Countershaft Powershift

Hydraulic System

Type
Load sense, closed center
Pump Type
Variable displacement piston pump
Pump Output
58 gal/min
Type
Load sense, closed center
Pump Type
Variable displacement piston pump
Pump Output
58 gal/min

Dimensions

Ground clearence*
22 in
Wheelbase
144 in
Ground Level to Top Arch/Boom* - Cable
110 in
Ground Level to Top Arch/Boom* - Single Function
146 in
Ground Level to Top Arch/Boom* - Dual Function
163 in
Ground Level to Axle Centerline*
33 in
Overall Length - Cable
287 in
Overall Length - Single Function
356 in
Overall Length - Dual Function
328 in
Blade Lift Height*
56 in
Blade Dig Depth*
21 in
Height - Top of Cab*
133 in
Blade Width - Standard
105 in
Blade Width - Wide
124 in
Overall Width - 30.5L-32 NOAW
127 in
Overall Width - 30.5L-32 2X Ring
127 in
Overall Width - 30.5L-32
133 in
Overall Width - 35.5L-32 NOAW
139 in
Overall Width - 35.5L-32
146 in
Weight - Cable
41,745 lb
Weight - Single Function
44,235 lb
Weight - Dual Function
45,249 lb
Ground Clearance*
22 in
Wheel Base
144 in

Brakes

Service
Enclosed wet single disc
Transmission Cooler Type
Spring applied, hydraulically released
Service
Enclosed wet single disc

Winch - Retrival Winch

Type
Hydraulically driven
Maximum Line Pull - Bare Drum
40,016 lbf
Maximum Line Speed
134 ft/min
Drum Diameter
9 in
Drum Width
10 in
Drum Capacity - 19.0 mm (3/4 in)
195 ft
Drum Capacity - 25.4 mm (1 in)
85 ft

Winch - Logging Winch

Type
Hydraulically driven
Maximum Line Pull - Bare Drum
40,016 lbf
Maximum Line Speed
280 ft/min
Drum Diameter
9 in
Drum Width
10 in
Drum Capacity - 19.0 mm (3/4 in)
195 ft
Drum Capacity - 25.4mm (1 in)
85 ft

Lift Chart

Lift Height, Retracted - Single Function
87 in
Lift Height, Retracted - Dual Function
104 in
Lift Height, Furthest - Dual Function
76 in
Lift Lowest, Retracted - Dual Function
36 in
Lift Lowest, Furthest - Single Function
24 in
Lift Lowest, Furthest - Dual Function
11 in
Ground Level to Axle Centerline* - Single Function
33 in
Ground Level to Axle Centerline* - Dual Function
33 in
Reach - Highest, Retracted - Single Function
70 in
Reach - Highest, Retracted - Dual Function
65 in
Reach - Lowest, Retracted - Dual Function
61 in
Reach - Lowest, Furthest - Single Function
105 in
Reach - Lowest, Furthest - Dual Function
99 in
Reach - Highest, Furthest - Dual Function
115 in

Grapple Dimensions

Grapple Capacity
14 ft²
Tip to Tip Height
82 in
Tong Ppening
126 in
Full Open Height
71 in
Minimum Stem Diameter
7 in
Full Closed Height
54 in

Cooling System

Power Train

Hydraulics

Structures

Winches

Operator Station

Serviceability

Integrated Technologies

  • Electrical
    • 24V electrical system
    • Alarm, back-up
    • Alternator, 115-amp
    • Batteries, maintenance free (2-1000CCA)
    • Lighting system, halogen (4 total)
    • Main disconnect switch with Diesel Exhaust Fluid (DEF) purge indicator light
    • Starter, electric, heavy duty
    • Starting and charging system
    • Diagnostic connector
  • Operator Environment
    • Cab, enclosed ROPS, FOPS, and OPS certified
    • HVAC system, high performance
    • Seat, High back air suspension with lap seat belt
    • Power port, 12V
    • Converter, 24V to 12V
    • Beverage holder (2)
    • Headliner with dome light
    • Floormat, non permeable and removable
    • Mirror, rear view
    • Computerized Monitoring System
  • Powertrain
    • Engine, Cat C7 with ACERT Technology
    • Fuel priming pump, electric
    • Fuel transfer pump (electric)
    • Fuel filters, inline, primary and secondary
    • Air Precleaner, Turbine
    • Air Cleaner, 2-stage
    • Cooling, cross-flow system with stationary cores and swing out panel
    • Reversing cooling fan, hydraulically driven on demand
    • Transmission, countershaft powershift (6F/3R)
    • Lock-up torque converter
    • Lubed for life driveline slipjoint and universal joints
    • Axles, heavy duty Cat inboard planetary approved for wide tires up to 73-44 with chains
    • Differential locks, independent front and rear
    • Four-wheel enclosed disc service brakes
    • Parking brake, hydraulically released, spring applied
    • Fuel tank, high capacity
  • Hydraulics
    • Load Sense Hydraulics
    • Pumps, variable displacement main and fan
    • Main control valve, high performance and multifuntioning
    • Filter, in-tank return
    • CAT ToughGuard hoses
  • Other Standard Equipment
    • Access panels, hinged or removable
    • Articulation lock link
    • Center Hitch, dual tapered roller bearing upper and lower
    • Ecology drains (engine oil, engine coolant, hyd tank, axles, transmission)
    • Fuel fill, ground level
    • Frames, heavy duty
    • Limb risers, heavy duty
    • Segregated compartments, engine/CEM and cooling
    • Product Link
    • Single side engine service
    • S·O·SSM sampling ports
    • Tilt Cab
    • Vandalism protection, lockable doors and cap locks
  • Arch / Boom
    • Cable
    • Single function
    • Dual Function
  • Winch
    • Retrieval
    • Logging
  • Blade
    • Standard
    • Wide
  • Starting Aids
    • Receptacle, jump start
    • Starting, cold weather
  • Tires
    • 30.5L-32 20PR, NOAW *
    • 30.5L-32 26PR , NOAW*
    • 30.5L-32 20PR , 2X Ring**
    • 30.5L-32 26PR , 2X Ring**
    • 30.5L-32 20PR
    • 30.5L-32 26PR
    • 35.5LB-32 20PR, NOAW*
    • 35.5LB-32 24PR, NOAW*
    • 35.5L-32 20PR
    • 35.5L-32 24PR
    • * NOAW – Narrow Overall Width
    • ** 2X Ring – Inner dual tire rim with integrated dual ring mounting of 24.5L-32 outer tire
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