Wacker Neuson 5000205129 Exhaust Rocker Arm

The Wacker Neuson Exhaust Rocker Arm is a genuine OEM component designed for a wide range of Wacker Neuson equipment sharing a common engine platform, including CT36 and CT48 walk-behind concrete power trowels, GP2600 and GP4000 portable generators, PT2 and PT3 centrifugal trash pumps, and VP and WP series single-direction vibratory plate compactors. As a genuine OEM part, it is produced to the exact material and dimensional standards used in original assembly, ensuring a direct, proper fit without modification. Wacker Neuson's broad equipment lineup — from concrete finishing to compaction to power generation — relies on shared engine architecture, making part number a high-demand service item across multiple machine families. Whether you are servicing a trowel on a finishing crew or maintaining a generator on a remote site, this is the correct OEM replacement rocker arm for the job.

Key Features

• Exact OEM Geometry and Material Grade — Manufactured to the same hardness and dimensional tolerances as the original, ensuring correct valve actuation geometry and long service life under repeated engine cycling.
• Direct Drop-In Installation — Mounts directly onto the rocker arm shaft using the original hardware and clearances; no re-machining or shimming required during valve train reassembly.
• Broad Multi-Family Fitment — Compatible with CT36 and CT48 trowels, GP2600 and GP4000 generators, PT2 and PT3 trash pumps, PDT and PG pump series, VP and WP vibratory plate compactors, BPU reversible plates, and BFS floor saws sharing the same engine platform.
• Restores Proper Valve Timing and Engine Breathing — A worn or damaged exhaust rocker arm causes improper valve lift, leading to loss of compression, rough running, hard starting, and accelerated engine wear; replacing it restores correct exhaust stroke performance.
• Fuel System and Emissions Compliance — Correct exhaust valve actuation is critical to maintaining proper combustion efficiency; a failed rocker arm can cause unburned fuel to enter the exhaust, leading to fouling and non-compliant emissions output.

The exhaust rocker arm is a pivoting lever in the engine's valve train that transfers motion from the camshaft — via the pushrod — to open the exhaust valve at the correct point in the combustion cycle. When the exhaust valve opens on cue, spent combustion gases are expelled cleanly, allowing the intake stroke to draw in a fresh air-fuel charge. When the rocker arm wears, develops a crack, or loses its correct pivot clearance, exhaust valve lift becomes inconsistent — the engine loses power, runs unevenly, and may become difficult to start. On equipment such as concrete trowels, generators, and pumps where consistent engine output directly affects the quality of work or the reliability of a power source, a properly functioning exhaust rocker arm is essential to keeping the engine performing as intended.

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.