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ROPS: None
Serial Number: 54X763
Stock Number: 8841
Description: Hyd. Counterweight, 18' Boom,
Powershift Trans,
CAT 3306 DI
35k lbs obo
40k lift
Updated: Thursday, June 11, 2026 08:37 am
Location: Madera, California, USA
Seller: National Equipment, LLC
ROPS: None
Serial Number: 54X765
Stock Number: 8840
Description: Hyd Counterwight, 18' Boom,
CAT 3306 DI
Powershift Transmission,
35k lbs obo
40k lift
Updated: Thursday, June 11, 2026 08:37 am
Location: Madera, California, USA
Seller: National Equipment, LLC
Hours: 6 239
ROPS: Open
Serial Number: 54X00674
Description: Superior CPX Hydraulic Conversion, Boom of Choice-Two (2) pipelayers available for sale in excellent condition, very detailed records and histories.
Updated: Thursday, July 16, 2026 11:55 am
Location: Lubbock, Texas, USA
Seller: Worldwide Machinery
Hours: 3 433
ROPS: Open
Serial Number: 54X00694
Description: Superior CPX Hydraulic Conversion, Boom of Choice
Updated: Thursday, July 16, 2026 11:55 am
Location: Denver, Colorado, USA
Seller: Worldwide Machinery
Hours: 2 821
ROPS: Open
Drawworks: Hydraulic
Description: Powershift, UC 90%, runs good
Updated: Monday, July 06, 2026 08:22 am
Location: Prestonsburg, Kentucky, USA
Seller: Equipment Tool Supply
Hours: 2 686
ROPS: Open
Serial Number: 54X00549
Description: 18FT MIDWESTERN SIDE BOOM. 3 LEVER CONTROL. 20IN SINGLE GROUSER TRACK PADS.
Updated: Tuesday, June 16, 2026 10:33 am
Location: Pittston Township, Pennsylvania, USA
Seller: LC Enterprise, LLC
ROPS: Open
Serial Number: 54X00544
Stock Number: 319
Description:
Updated: Thursday, June 11, 2026 08:37 am
Location: Madera, California, USA
Seller: National Equipment, LLC
ROPS: Open
Serial Number: 54X00570
Stock Number: 17077
Engine Manufacturer: CATERPILLAR
Engine Model: 3306DI
Description: BULLDOZER PARA PARTES, CON MOTOR CATERPILLAR 3306DI A DIESEL, ADITAMENTO MARCA SUPERIOR, MODELO CPX-71, AÑO 2012
Updated: Monday, July 06, 2026 11:11 am
Location: Cuauhtémoc, Chihuahua, Mexico
Seller: Maquinaria Wiebe Km 24
ROPS: None
Serial Number: 54X00571
Stock Number: 8844
Description: Hyd Counterweight
3306 DI
35k lbs obo
40k lift
Updated: Thursday, June 11, 2026 08:37 am
Location: Madera, California, USA
Seller: National Equipment, LLC
Hours: 150
ROPS: Open
Serial Number: 54X00463
Stock Number: 561D Hydraulic PL
Description: 561D Hydraulic Pipelayer S/N 54X00463
NEW Challenger CPC-561 Hydraulic Conversion
40,000 lbs. capacity
Two speed load line winch
Si...
Updated: Wednesday, May 06, 2026 07:39 am
Location: Tulsa, Oklahoma, USA
Seller: Challenger Services
ROPS: Open
Stock Number: 93753
Description: WBM CANOPY, JOYSTICK BOOM CONTROLS, ENGINE COOLANT HEATER, 20" SINGLE GROUSE PADS WITH 2.' GROUSER HEIGHT, 20" SINGLE GROUSERS, RAIL HEIGHT 4", 20...
Updated: Wednesday, June 10, 2026 07:45 am
Location: Acheson, Alberta, Canada
Seller: Arrow-West Equipment Ltd.
ROPS: Open
Serial Number: 54X00502
Description: 35k lbs obo
40k lift
Updated: Thursday, June 11, 2026 08:37 am
Location: Madera, California, USA
Seller: National Equipment, LLC
Hours: 3 970
ROPS: Open
Serial Number: 54X00394
Description: 1979 Caterpillar 561D crawler pipelayer, CAT 3306 diesel engine, naturally aspirated, powershift, lever steering, 2007 Midwestern 561MMC hydraulic ...
Updated: Tuesday, June 30, 2026 02:54 pm
Location: Carbondale, Pennsylvania, USA
Seller: Old Forge Power Equipment Inc.
ROPS: Open
Serial Number: 54X406
Description: 2011 Midwestern M561 Hydraulic Conversion, 18 ft 5 in Midwestern Side Boom, Winch, Drawbar, 20" Track Shoes, Excellent Undercarriage!
Updated: Monday, June 29, 2026 09:18 am
Location: Womelsdorf, Pennsylvania, USA
Seller: WEACO EQUIPMENT
ROPS: Open
Description: Please Contact For Further Details
The Unit Is Located Oklahoma City, Oklahoma
Updated: Monday, July 20, 2026 07:43 am
Location: Columbia, Maryland, USA
Seller: Energy Kinetics, LLC
ROPS: Open
Description: Please Contact For Further Details
The Unit Is Located In Oklahoma City, Oklahoma
Updated: Monday, July 20, 2026 07:43 am
Location: Columbia, Maryland, USA
Seller: Energy Kinetics, LLC
ROPS: Open
Serial Number: 54X00731
Stock Number: 561D Hydraulic PL
Description: 561D Hydraulic Pipelayer S/N 54X00731
Hydraulic conversion
40,000 lbs. capacity
OROPS
Two speed load line winch
Single speed boom winch
2...
Updated: Wednesday, May 06, 2026 07:39 am
Location: Tulsa, Oklahoma, USA
Seller: Challenger Services
ROPS: Open
Serial Number: 54X00667
Stock Number: 561D Hydraulic PL
Description: 561D Hydraulic Pipelayer S/N 54X00667
Hydraulic conversion
40,000 lbs. capacity
OROPS
Two speed load line winch
Single speed boom winch
...
Updated: Friday, July 03, 2026 12:03 pm
Location: Tulsa, Oklahoma, USA
Seller: Challenger Services
ROPS: Open
Serial Number: 54X00355
Stock Number: 561D Hydraulic PL
Description: 561D Hydraulic Pipelayer S/N 54X00355
Challenger CPC-561 Hydraulic Conversion - 2013
40,000 lbs. capacity
OROPS
Two speed load line winch
Sing...
Updated: Friday, July 03, 2026 12:03 pm
Location: Tulsa, Oklahoma, USA
Seller: Challenger Services
ROPS: Open
Serial Number: 54X00410
Stock Number: 561 Mechanical PL
Description: 561D Mechanical Pipelayer S/N 54X00410
Mechanical pipelayer – original Cat winches
40,000 lbs. capacity
Two speed load line winch
Single s...
Updated: Wednesday, May 06, 2026 07:39 am
Location: Tulsa, Oklahoma, USA
Seller: Challenger Services
ROPS: Open
Serial Number: 54X00337
Stock Number: 561D Hydraulic PL
Description: 561D Hydraulic Pipelayer S/N 54X00337
Challenger CPC-561 Hydraulic Conversion - 2013
40,000 lbs. capacity
Two speed load line winch
Single...
Updated: Friday, July 03, 2026 12:03 pm
Location: Tulsa, Oklahoma, USA
Seller: Challenger Services
ROPS: Open
Serial Number: 54X00643
Stock Number: 561D Hydraulic PL
Description: 561D Hydraulic Pipelayer S/N 54X00643
Hydraulic Conversion
40,000 lbs. capacity
OROPS
Two speed load line winch
Single speed boom winch
...
Updated: Friday, July 03, 2026 12:03 pm
Location: Tulsa, Oklahoma, USA
Seller: Challenger Services
ROPS: None
Serial Number: 54X00609
Description: Hyd Counterweight
CAT 3306 DI
Powershift Trans
Boom
35k lbs obo
40k lift
Updated: Thursday, June 11, 2026 08:37 am
Location: Madera, California, USA
Seller: National Equipment, LLC