Wacker Neuson 5100000581 Crankcase

The Wacker Neuson Crankcase is a genuine OEM component designed for a wide range of Wacker Neuson CT36 and CT48 walk-behind concrete power trowels, PT3A centrifugal trash pumps, and select compaction and power equipment including BPU series reversible vibratory plate compactors and GP series portable generators. As a direct OEM replacement sourced through Wacker Neuson's authorized parts network, the Crankcase is built to the same specifications as the original unit it replaces. Compatible models span the CT36-8A, CT36-8A-V, CT48-8A, CT36AGP, CT36AGT, CT36AVP, CT36AVT, CT48ADP, CT48ADT series trowels, PT3A trash pumps, BPU 3050A, BPU 3750Ats, BPU 4045A plate compactors, and additional equipment. Verify your model and machine number before ordering to confirm an exact application match.

Key Features

• Genuine OEM Casting Integrity — Manufactured to Wacker Neuson's original material and dimensional specifications, ensuring the crankcase provides the correct bore geometry, bearing journal tolerances, and sealing surfaces critical to engine longevity.
• Drop-In Engine Compatibility — Engineered as a direct replacement that aligns with all original mounting points, port locations, and gasket surfaces, so the engine assembly goes back together without modification.
• Broad Fitment Across Multiple Product Families — Confirmed fitment across CT36 and CT48 walk-behind trowel series, PT3A trash pumps, BPU series reversible vibratory plate compactors, and select generators and screeds, making this a high-utility stock part for multi-machine fleets.
• Structural Foundation for Engine Performance — A sound crankcase maintains oil containment, crankshaft alignment, and compression integrity; a cracked or warped housing leads to oil loss, bearing failure, and complete engine seizure.
• Fuel System and Oil Seal Compliance — Correct crankcase geometry ensures all oil gallery passages and seal seats function as designed, preventing leaks that can create fire risk or environmental non-compliance on the worksite.

The crankcase is the structural core of a small engine — it houses the crankshaft, connects to the cylinder bore above, and contains the lubrication oil that keeps internal moving parts from wearing prematurely. Every major engine component, from the connecting rod and bearings to the oil seals and gaskets, relies on the crankcase being dimensionally correct and free of cracks or distortion. When a crankcase is damaged — whether from impact, overheating, or a catastrophic internal failure — oil leaks, loss of compression, and crankshaft misalignment follow quickly, making the engine inoperable. Replacing it with a genuine OEM unit like the Wacker Neuson 5100000581 restores the engine's structural integrity and ensures all mating components seat and seal correctly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.