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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: Friday, October 30, 2026 01:12 pm
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: Friday, October 30, 2026 01:12 pm
Location: Madera, California, USA
Seller: National Equipment, LLC
Hours: 3,433
ROPS: Open
Serial Number: 54X00694
Description: Superior CPX Hydraulic Conversion, Boom of Choice
Updated: Monday, October 26, 2026 08:13 am
Location: Denver, Colorado, USA
Seller: Worldwide Machinery
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: Monday, October 26, 2026 08:13 am
Location: Lubbock, Texas, USA
Seller: Worldwide Machinery
Hours: 2,686
ROPS: Open
Serial Number: 54X00549
Description: 18FT MIDWESTERN SIDE BOOM. 3 LEVER CONTROL. 20IN SINGLE GROUSER TRACK PADS.
Updated: Tuesday, September 08, 2026 09:52 am
Location: Pittston Township, Pennsylvania, USA
Seller: LC Enterprise, LLC
ROPS: Open
Serial Number: 54X00544
Stock Number: 319
Description:
Updated: Friday, October 30, 2026 01:12 pm
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: Friday, November 06, 2026 09:46 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: Friday, October 30, 2026 01:12 pm
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: Tuesday, September 22, 2026 07:49 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: Monday, November 02, 2026 08:05 am
Location: Acheson, Alberta, Canada
Seller: Arrow-West Equipment Ltd.
ROPS: Open
Serial Number: 54X00502
Description: 35k lbs obo
40k lift
Updated: Friday, October 30, 2026 01:12 pm
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: Thursday, September 24, 2026 07:03 am
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: Thursday, August 27, 2026 12:12 pm
Location: Womelsdorf, Pennsylvania, USA
Seller: WEACO EQUIPMENT
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: Tuesday, September 22, 2026 07:49 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: Tuesday, September 22, 2026 07:49 am
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: Tuesday, September 22, 2026 07:49 am
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: Tuesday, September 22, 2026 07:49 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: Tuesday, September 22, 2026 07:49 am
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: Tuesday, September 22, 2026 07:49 am
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: Friday, October 30, 2026 01:12 pm
Location: Madera, California, USA
Seller: National Equipment, LLC