The Wacker Neuson 5200019766 Cylinder Block Complete is a genuine OEM component built for the APT4S and APT4T pump series, including Cold Weather, Electric Brake, Surge Brake, and Skid-mounted configurations. As the structural and mechanical core of the engine assembly, this block is engineered to exact Wacker Neuson tolerances, ensuring proper bore geometry, port alignment, and component mating surfaces throughout the assembly. This genuine OEM part is sourced directly from Wacker Neuson, making it the correct choice when a full block replacement is required to restore the engine to original operating condition. Confirmed fitment covers the APT4S Pump with Skid, APT4S Pump with Skid Cold Weather, APT4T Pump with Electric Brake, APT4T Pump with Surge Brake, and their corresponding Cold Weather variants.
Key Features
- OEM Bore and Deck Precision — Machined to exact Wacker Neuson tolerances for correct piston clearance, ring seal, and head gasket mating — critical to maintaining compression integrity in a pump engine.
- Drop-In Engine Core Replacement — Retains all original mounting points, port locations, and bolt patterns so internal components transfer directly without modification to the surrounding drivetrain or pump assembly.
- Broad APT4 Series Coverage — Fits APT4S and APT4T configurations across standard, Cold Weather, Electric Brake, Surge Brake, and Skid-mounted variants — one part number covering the full APT4 pump family.
- Restores Full Engine Output — A cracked, warped, or worn cylinder block causes compression loss, oil leaks, and overheating. Replacing with this complete block restores the engine's ability to drive consistent pump discharge pressure and flow.
- Genuine Wacker Neuson OEM Part — Supplied as a complete cylinder block assembly, verified under part number 5200019766, and backed by Wacker Neuson's OEM parts program.
The cylinder block is the structural foundation of the engine — it houses the cylinder bore, coolant passages, oil galleries, and provides the mounting surface for the crankcase, cylinder head, and ancillary components. When the block is sound, the engine maintains proper compression, lubrication, and thermal management. A damaged or worn block — whether from a seized piston, overheating, or physical cracking — compromises all of these systems simultaneously, making full block replacement the correct repair path rather than attempting to recondition a failed unit. Replacing the block complete ensures that bore dimensions, sealing surfaces, and structural integrity are restored to original specification.
Part Details
| Part Number | 5200019766 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Cylinder Block Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4S Pump w/Skid | APT4S | 5200018977 |
| APT4T Pump, Electric Brake, Cold Weather | APT4T CW | 5200019793, 5200019792 |
| APT4T Pump, Electric Brake | APT4T | 5200019644, 5200019643 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
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.
Wacker Neuson