Wacker Neuson 5000025649 Lock Washer

The Wacker Neuson is a genuine OEM Lock Washer designed for a wide range of Wacker Neuson portable generators, trash pumps, diaphragm pumps, light towers, power buggies, and vibratory truss screed power sections. This genuine OEM component is sourced directly from Wacker Neuson, ensuring it meets the exact material and dimensional specifications required for proper fastener retention across all covered equipment families. Verified fitment spans the GP3800, GP4000, GP5600, GP6600, GPS5600, GPS6600, GPS9700, PT6LT, PT6LS, PDT2, PDT3, PDI2, PDI3, LTC4 light towers, WB16 power buggies, CRT ride-on trowels, and vibratory truss screed power sections, among others. When a fastener connection matters — on a generator frame, pump housing, or screed assembly — using the correct lock washer keeps critical hardware from backing out under vibration.

Key Features

• Genuine OEM Material Specification — Manufactured to Wacker Neuson's exact hardness and spring-tension spec, so the washer bites and holds under the vibration loads these machines generate.
• Direct Drop-In Replacement — Matched to the original fastener diameter and seating geometry; installs in the same position as the factory washer with no rework to mating hardware.
• Broad Cross-Equipment Compatibility — A single verified part number covers GP/GPS portable generators, PT6LT and PT6LS trash pumps, PDT and PDI diaphragm pumps, LTC4 light towers, WB16 power buggies, CRT ride-on trowels, and vibratory truss screed power sections.
• Vibration Resistance Where It Counts — Lock washers in pump and generator assemblies prevent fastener loosening during continuous operation; a missing or flattened washer can allow hardware to back out and cause costly secondary damage.
• Low-Cost Insurance on Critical Fastener Points — Replacing a worn or distorted lock washer during routine service is far less costly than re-torquing or replacing damaged housings caused by a loose fastener.

A lock washer is a hardened, spring-tension washer placed under a bolt or nut to prevent it from loosening due to vibration or dynamic loading. As the fastener is tightened, the washer compresses against both the nut face and the mating surface, creating resistance that keeps the fastener from backing out during machine operation. On equipment like portable generators, trash pumps, and concrete trowels — all of which produce significant vibration or torque loads — lock washers are essential at housing joints, mounting brackets, and panel attachment points. When a lock washer becomes flattened, corroded, or is simply omitted during a repair, fasteners can work loose progressively, leading to misalignment, component separation, or damage to the surrounding assembly.

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.

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