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“Muck to the rescue!" and "Let's get mucky!
— Original catchphrases

Muck is a red bulldozer with a dumping bed. He/She often acts before thinking and subsequently gets in trouble for it.


Muck is friendly and loves getting muddy. He/She does not like taking baths that much but takes them when he/she feels like it, or when he/she knows it is important. Muck is afraid of the dark, but he/she learns to be calm. Muck is also kind-hearted and is sometimes silly, but he/she learns his/her lesson in the end.


Muck is red with an orange dumping bed and bulldozer blade. His/her caterpillar tracks are black and his/her hydraulic cylinders are silver, along with his/her mouth.


Original Series:


Project: Build It:



  • Muck was the second machine bought by Bob after Scoop needed help with excavation and carrying supplies.
  • Early descriptions of Muck in the US referred to him/her as a bulldozer.
  • Muck is both genders: Male in the UK and Female in the US.
  • Muck says that Dizzy is his/her best friend in When Bob Became A Builder.
  • Muck could have been inspired by Bozer from Jim Henson's Construction Site, who was also a red bulldozer with a dump bed.
  • Muck's original movement sound effect whenever he/she drives was a repeating thumping sound.
  • Muck was the first vehicle that Wendy had a ride on.
  • In the Finnish version, Muck is called "Pusku".

Main Characters
(Original Series)
BobWendyScoopMuckDizzyRoleyLoftyFarmer PicklesTravisSpudMr. Bernard Bentley
J.J.'s Building Yard J.J.MollySkipTrix
Project: Build It ScramblerBennyGripper and GrabberTumblerFlexBristlePackerSumsyDodgerSplasher
Ready, Steady, Build! ScratchRubble
Friends and Neighbors
(Original Series)
Mrs. PottsMrs. PercivalMrs. BroadbentMr. DixonMr. BeasleyMr. FothergillMr. EllisAngelo SabatiniSophia SabatiniMrs. Barbara BentleyDavid DixonPam Goody
Friends and Neighbors
(Project: Build It)
RobertDorothyMarjorieSunnySaffronCarlo and CassiaSandy BeachMaxMr. BattersbyBazEllaMegPiperOscar FlicksMr. Carruthers
Friends and Neighbors
(Ready, Steady, Build!)
David MockneyBrad RadDickie OliverMrs. Toosie
One Time Characters Doris EllisPogoTony the HairdresserMr. StevenKatieMr. CostelloJana von StrudelCharleneMr. AdamsJackarooR.VeeMr. BellMrs. SeagullJanette JamisonUnknown Machines
Guest Characters Lennie LazenbyJennyTomBunty FergusonFlorence MountfitchetPirate BrickbeardUnnamed Humans
Bob's Animal Friends PilchardBirdFinTommySquawkScrufftyHamishTimmikinsHumptySprat
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