Caterpillar 501HD BROCHURE

501HD

Track Harvester

Engine Weights

Engine Model Cat
Gross Power @ 1,800 rpm 122 kW 163 hp

Reach

Fixed Linkage Boom Reach to Pin 6.05 m 19 ft 10 in
Telescopic Boom Reach to Pin 7.93 m 26 ft 0 in

®

C6.6 ACERT™ Tier 3 Operating Weight (without attachment) 18 000 kg 40,000 lb

501HD Features

Power Train

The Cat® C6.6 engine with ACERT™ Technology
and an ef cient cooling system provides
exceptional power and fuel ef ciency.

Hydraulics

The axial piston hydraulic pump delivers quiet
ef ciency, controllability and durability. The valve
system incorporates fuel ef cient load sensing
pressure compensated technology.

Operator Station

Purpose built forestry cab with excellent visibility
to the work area. Superb air  ow for heating and
cooling functions, re ned instrumentation, and
storage areas ensure a comfortable, uncluttered
working environment.

Undercarriage

Forestry duty undercarriage provides high quality
and durability along with optimal machine balance
for extended reaches.

Boom and Stick

Optional boom sets provide versatility to mount
various harvesting heads.

Contents

Power Train..........................................................3

Hydraulics ............................................................4

Operator Station..................................................5

Structures and Undercarriage .........................6

Boom and Stick ...................................................7

Versatility..............................................................7

Owning and Operating Costs ............................8

Serviceability.......................................................9

Customer Support.............................................10

Sustainability .....................................................10

501HD Specications........................................11

501HD Standard Equipment..............................14

501HD Optional Equipment...............................14

Notes...................................................................15

Cat®track harvesters are equipped with dependable
Cat engines, load sensing hydraulics and factory installed
attachments. The forward-mounted cab and rear engine
placement give the operator excellent visibility over the
entire harvest area. The unique front entry cab allows
for easy entry and exit and the cab tilts for servicing.
The telescoping boom’s V-shaped bottom extends
thelife of the wear pads and minimizes side-to-side
movement as the boom telescopes in and out.

Power Train

Exceptional Power and Fuel Efficiency

Cat C6.6 Engine

The Cat C6.6 engine with ACERT™ Technology gives exceptional power and fuel efficiency, while meeting
Tier 3, Stage IIIA emission requirements. This engine includes electronic governing, cold mode start
strategy, automatic altitude compensation, electronic diagnostics and fault monitoring.

Exceptional Cooling Capability

A side by side antifreeze, hydraulic, and charge air cooling package allows efficient heat rejection.
Thecooling package is located away from the harvesting front where less debris and dust exposure
minimizes cleaning requirements.

Cold Climate Capability

A thermal bypass in the hydraulic cooler line allows for quicker cold weather warm up of components by
diverting oil back to the tank until the temperature of the oil requires cooling. An optional cold weather
starting aid heats engine antifreeze and circulates it through the engine, hydraulic tank, and cab for
easier start ups.

Large Fuel Carrying Capacity

The 378 L (100 gal) fuel capacity allows extended operating shifts and includes a lockable compartment
lid for security.

3

Hydraulics

Continuous, Reliable and Responsive Control

Hydraulic Pump is Powerful, Responsive, Quiet

Designed for continuous, efficient and reliable operation, theharvester’s axial piston hydraulic pump
meets stringent requirements for noise, efficiency, controllability and durability.

Valves are Load Sensing, Pressure Compensated

The valve system has proven reliability in forestry applications with its fuel efficient load sensing
pressure compensated technology. Each section is designed specifically for the flow and pressure of
thefunction, therefore optimizing machine functionality and fuel efficiency. Ramped and proportional
carrier functions save mechanical wear and tear on structures. Hydraulic valve configurations are
available for operating either fixed or dangle style harvesting heads.

Automated control system

The IQAN computer based control system provides precise control of machine functions through fully
proportional hydraulic valves.

Electric Hydraulic Oil Fill Pump

The hydraulic oil site gauge provides easy visibility to know when hydraulic oil needs to be added.
Aneasy accessible service hose allows hydraulic oil to be pumped through the hydraulic filtering system
and into the tank. This reduces maintenance time and helps to maintain oil cleanliness requirements.

4

Operator Station

Comfort and Convenience to Keep People Productive

Safe Front Entry System

The unique front entry cab allows for easy and safe access
onto the track frame. Foot pedals are attached to the door
toswing out of the way and are deactivated when the door is
open. The reverse slope front window keeps snow and debris
from falling onto the window. Accumulated moisture can be
removed with the front window wiper/washer.

Unobstructed Visibility

The engineered cab forward and rear engine design gives
exceptional operator visibility, including to theboom side
ofthe cab, so that potential trees to be harvested can be
seenwithout swinging the cab forrequired visibility.

IQAN-MD3 control system

The carrier control system provides full function graphics
display for easy monitoring of machine parameters.
Operators can enter individual response preferences
tocustomize the joystick controls.

Heated Air Suspension Seat

The heated air suspension seat features lumbar support
andneck rests that provide optimum comfort. Armrests are
adjustable in all directions and angles for full arm support,
areinforced seat structure designed for track machines
absorbs added shock loads and optional four-way seat
isolator provides additional vibration dampening.

Channeled Air Flow System

A 40,000 BTU air conditioning and heater system includes
channeled air flow to louvered vents for full coverage of the
operator and defrosting/defogging of windows. An automatic
control system maintains consistent temperature for a
constant comfort level.

Molded Consoles and Headliner

The molded consoles and headliner incorporated storage
compartments and trays eliminate cab clutter. Two 12-volt
power points provide flexibility in mounting additional
electric and electronic equipment.

Structures and Undercarriage

Built to Work in Rugged Environments

Strong X Body Design

The full length of the track frames are tied to the car body
forstrength and durability when maneuvering amongst
stumps and rocks. The high walker design provides excellent
ground clearance.

Easy to Clean

The rounded upper surfaces of the track frames shed dirt
and debris for easier cleaning and reduced wear.

Integral Track Guards/Guides

Full length track guards provide complete chain support
onuneven ground for reduced wear.

Final Drives

High torque final drives provide the carrier with a

1.1to1tractive effort to weight ratio for easy mobility
inthewoods while maintaining good speed to efficiently
navigate from tree to tree.

Rollers

The 2 top rollers and 8 bottom rollers are identical for
partscommonality.

Engine Mounted Behind Boom

The rear mounted engine provides effective counter balance
for lift capabilities at full reach.

Tanks Mounted in Counterweight

Fuel and hydraulic tanks are incorporated into the rear
counterweight for increased balance on a low tail swing carrier.

Wide Boom Mounting Base

The base of the boom has been widened to provide the
strength required for side loads when pulling trees out
ofthestanding forest.

Heavy Duty Guarding

The engine and hydraulic compartments are well protected
from falling debris and have sloped surfaces for easy cleaning.

6

Boom and Stick

Made for High Stress and Long Service Life

Fixed Linkage Boom

The fixed linkage boom provides 7.1 m (23.3ft) reach
tothetree with a PF-48 fixed head.

Telescopic Boom

The telescopic boom for dangle heads provides 8.2 m (27ft)
reach to the tree. The 5 sided “V” bottom stick design
provides increased strength for higher lift capacity and
extended wear pad life for long serviceability.

Steel Tube Lines

Steel tube hydraulic lines provide extended life and
dissipateheat. Cover plates on the stick booms protect
pipesfrom damage.

Versatility

Work Tool Options
to MeetYour Needs

Attachments

From thinning to final cut harvesting, a selection
ofharvesting heads are available, including fixed
anddanglestyles.

Owning and Operating Costs

Proven Best Investment

ACERT Technology, Fuel Economy

Based on ongoing testing, the fuel economy of Cat engines with ACERT Technology is 3 to 5 percent
better than current competing technologies. This fuel economy is directly related to the complete
combustion of fuel due to the integration between the electronic control that monitors conditions,
theair management system that controls air volume and the fuel injection system that delivers the
amount of fuel as needed.

Designed for Forest Applications

The undercarriages are specifically designed for harvesting applications, providing the strength
anddurability that allows for a long service life.

Engine and hydraulic canopies are durable to withstand working in the woods, and their sloped designs
allow for easy shedding of debris for simplified cleaning.

Automatic Idle Down

The harvester control system includes an automatic engine idle down feature to reduce fuel consumption
during periods of inactivity.

8

Serviceability

Easy to Maintain. Easy to Service.

Rear Mounted Fuel and Hydraulic Tanks

The fuel and hydraulic tanks are located within the
counterweight, allowing the entire side of the machine
tobeopened to access the complete hydraulic system
frompump to valves.

Forward Tilting Cab

The forward tilting cab allows easy access for under cab
components and provides a platform for engine service.

Easy Fluid Changes

An electric refill pump to add oil into the hydraulic tank
maintains system cleanliness by passing all oil through the
filtering system.

Boom Grease Lines

Booms have grease lines extending from all pivot points
down to the base of the main boom for on ground service.

Hinged Covers

The covers over the engine and hydraulic components open
for easy access, and feature sloping surfaces for easy cleaning.

Debris Shedding Track Frames

The upper surfaces of the track frames are sloped for easier
cleaning of dirt and debris.

9

Customer Support

Ready to Help. Anytime. Anywhere.

Caterpillar is known the world over for the quality of customer
support from its dealer network – the industry’s best. No matter
where you are, the expertise of a Cat dealer is always nearby.
Your local Cat dealer is your forestry consultant who can
recommend the machines, work tools and services to maximize
your operation and provide the support to keep you at top
productivity.

• 24-hour parts availability, where and when you need
them, to minimize expensive downtime.

• Customer Support Agreements to lower your
operatingcosts.

• State-of-the-art diagnostic programs, such as S·O·S
oilanalysis, inspection services and trend reporting
tohelp avoid unscheduled repairs.

• Financing programs for buying, renting or leasing
Catequipment.

• Cat insurance to cover equipment losses from theft,
collision, flood, upset or overturn, fire, vandalism
andmore.

• Product Link to manage your equipment fleet through
remote monitoring.

For more information on Cat products, dealer services
andindustry solutions, visit us at www.cat.com.

SM

Sustainability

Reducing Environmental Impacts

Structures

Major structures and components are built to be rebuilt, reducing waste and replacement costs.

ACERT ™ Technology

ACERT™ Technology reduces engine emissions at point of combustion with less moving parts
forloweroperating costs.

10

501HD Specifications

Power Train Boom System Hydraulic System

Engine Model Cat® C6.6 ACERT™ Fixed Linkage 6.04 m 19.8 ft Pump Size – Carrier 140 cm38.54 in

Gross Power 122 kW 163 hp
@1,800rpm Fixed Linkage Lift 3856 kg 8,500 lb Hydraulic Oil Flow 307 L/min 81 gal/min

Rated Power
@2,200rpm

Torque – max 683 N·m 504 lbf-ft

Displacement 6.6 L 403 in

116.5 kW 156 hp

Operating Weights

Operating Weight 18 000 kg 40,000 lb
without Head

Operating Weight 20 411 kg 45,000 lb
with Attachment (est.)

Ground Pressure
(standardpads)

49 kPa 7.11 psi

Operating Specifications

Travel Speed – Low 1.8 km/h 1.1 mph

Travel Speed – High 3 km/h 1.9 mph

Maximum 193 kN 43,400 lb-f
TractiveEffort

Swing Torque 41 200 30,388

N·m lbf-ft

Swing Speed 7 rpm 7 rpm

Reach– max and Implement

Capacity, Gross –
max reach

Telescopic Boom
Reach – max

3

Telescopic Boom 2300 kg
LiftCapacity,
Gross– max reach

Reach with PF-48 7.1 m 23.3 ft
Fixed Head on
FixedLinkage

Reach with Dangle 8.23 m 27 ft
Head on Telescopic
Boom

7.93 m

26 ft

5,071 lb

Service Refill Capacities

Fuel Tank 378 L 100 gal

Cooling System 23.6 L 6.25 gal

Engine Oil 15 L 4 gal

Hydraulic System 227 L 60 gal

Swing Drive 3.78 L 1 gal

Hydraulic Tank 228 L 60 gal

@ 2,200 rpm

Hydraulic System 344 bar 5,000 psi
Pressure

Undercarriage

Size/Pitch (D-5 size) 190 mm 7.5 in

Track Gauge 2235 mm 88 in

Track Length 3960 mm 156 in

Ground Clearance 660 mm 26 in

Final Drives 709BC

Number of Rollers 2 upper, 8 lower

Standards

FOPS/OPS/ROPS Cab meets

FOPS/OPS/ROPS
requirements

Shipping Dimensions*

Width 2840 mm 112 in

Height 3454 mm 136 in

* with 610 mm (24 in) double grouser shoes

3

11

501HD Specifications

Dimensions

All dimensions are approximate.

1

4

5

6

3

2

8

7

1

4

Height with Standard Pads

1

Maximum Reach with Prentice PF-48 Processor

2

Minimum Reach with Prentice PF-48 Processor

3

Swing Center to Rear of Counterweight

4

Undercarriage Length

5

Ground Clearance

6

Reach to Stick Boom Pin with Standard Boom

7

Width – with 610 mm (24 in) Pads

8

Reach to Stick Boom Pin with Telescopic Boom Extended

9

5

9

3429 mm

7087 mm

3658 mm

1645 mm

3962 mm

660 mm

6045 mm

2845 mm

7930 mm

6

8

11 ft 3 in

23 ft 3 in

12 ft 0 in

64.75 in

13 ft 0 in

26 in

19 ft 10 in

9 ft 4 in

26 ft 0 in

12

Working Ranges

–

–

–

–

501HD Fixed Head Boom Sweep

8

6

Lift Point Height (Meters)

6700

7350

3400

3700

3850

4

2

0

–2

4

–2

02468–410

4

Lift Point Radius (Meters)

SWEEP Lift (kg)

501HD Fixed Head Boom Sweep

30

501HD Telescopic Boom Sweep

0– 2 2 4 6

Lift Point Radius (Meters)

ARM EXTENDED ARM RETRACTED

501HD Telescopic Boom Sweep

2300

8

Lift (kg)

8

6

Lift Point Height (Meters)

4

2

0

–2

–4

10

30

14,700 7,500

16,200

8,150

8,500

10 –5 0 5 10 15 20 25 30

Lift Point Radius (Feet)

SWEEP Lift (lb)

25

20

Lift Point Height (Feet)

15

10

5

0

–5

–10

5,000

10 –5 0 5 10 15 20 25 30

Lift Point Radius (Feet)

ARM EXTENDED ARM RETRACTED Lift (lb)

25

20

Lift Point Height (Feet)

15

10

5

0

–2

–4

13

501HD Standard Equipment

Standard equipment may vary. Consult your Cat dealer for details.

ELECTRICAL

12V system
Master disconnect
Circuit breaker protection
150 Amp alternator
Two 12V maintenance free batteries
Full lighting package – 12 cab mounted

halogen light xtures
IQAN programmable control system
MD3 full color graphics display screen

OPERATOR ENVIRONMENT

Pressurized OPS-FOPS-ROPS cab
Dual joystick control
Reverse slope windshield
Skylight
Seat belt
Isolation mountings
Tinted 12.7 mm (1/2 in) polycarbonate

windows
Heated air suspension seat
40,000 BTU AC/Heater system with

autotemp control
Window defroster vents
Two 12V power points
Dome light

Radio ready –includes speakers

andAM/FM antennae
Cup holder
Front entry door
Travel alarm
Electric cab tilt
Fire extinguisher mounting pad
3 escape routes

POWER TRAIN

Cat C6.6 ACERT™ engine meets Tier 3

emissions requirements
Innitely variable travel speed
49° C (120° F) ambient temperature

coolingpackage
Removable debris screen
Swing out A/C condenser
378 L (100 gal) fuel tank
Fuel water separator

HYDRAULICS

140 cc (8.54 in
Closed circuit load sensing valves
228 L (60 gal) hydraulic tank
Electric hydraulic oil ll pump

3

) variable displacement pump

UNDERCARRIAGE

Fully guarded forestry duty high walker

undercarriage
8 lower rollers, 2 upper rollers
Rock guard – shoe supports
610 mm (24 in) DG grouser pads

withmudand snow relief
Relief sprockets
2 speed track motors
Automatic track brakes
Interchangeable upper and lower rollers
Heavy duty “D” tow rings

BOOMS AND STICKS

Fixed boom arrangement with 3 bar linkage
Telescopic boom arrangement with “V”

bottom design

ANTIFREEZE

50% concentration extended life coolant

501HD Optional Equipment

Optional equipment may vary. Consult your Cat dealer for details.

TRACK SYSTEMS OTHER EQUIPMENT

610 mm (24 in) SG grouser pads with AM/FM/CD/Satellite Radio receiver

mudand snow relief

760 mm (30 in) DG grouser pads with

mudand snow relief

14

Sun shades
Five above door HID work lights
Four way seat isolator
Cold weather engine coolant and hydraulic

tankwarm up system

Harvesting heads

Notes

15

501HD Track Harvester

For more complete information on Cat products, dealer services, and industry solutions,
visit us on the web at www.cat.com

© 2011 Caterpillar Inc.
All rights reserved

Materials and specications are subject to change without notice. Featured machines
in photos may include additional equipment. See your Cat dealer for available options.

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AEHQ6418 (11-2011)