The Wacker Neuson Square 8Mm Key is a genuine OEM component designed for a wide range of Wacker Neuson tandem rollers, vibratory trench rollers, reversible vibratory plate compactors, and light towers — including the RD16-90, RD16-100, RT82-SC2, RT56-SC2, RTLx-SC3, RTL82-SC3, RTx-SC2, LTN6L, LTN6LE, LTC4L series, DPU80, DPU90, and DPU110 series machines, among others. As a genuine Wacker Neuson part, the is manufactured to the exact tolerances required for proper shaft-to-component engagement, ensuring the key seats and locks correctly in service. Stocking an OEM square key means you are restoring the drivetrain interface to the same specification it left the factory with, which matters when torque transfer and shaft alignment are critical to compaction or power delivery performance.
Key Features
- Genuine OEM Shear and Torque Tolerancing — Manufactured to the precise 8mm cross-section dimension required for correct seating in the keyway, so torque is transferred evenly without play or fretting.
- Direct Shaft-Keyway Fit — Drops into the keyway slot on the shaft and mating hub without machining or filing; the square profile locks both components into alignment on installation.
- Broad Cross-Series Compatibility — A single part number covers RD16 tandem rollers, RT/RTL/RTx vibratory trench rollers, DPU80/90/110 reversible plate compactors, LTN6L/LTN6LE/LTC4L light towers, and CB14B rollers.
- Drivetrain Integrity — A worn or missing square key allows the shaft and hub to slip relative to each other, causing vibration, accelerated wear on mating surfaces, and loss of drive. Replacing it promptly restores positive mechanical engagement.
- Verified Wacker Neuson Part Number — Sourced directly as OEM; part number 5000159261 cross-references across multiple machine families, so confirm your model number before ordering to ensure application accuracy.
A square key is a small but critical drivetrain component that sits in a machined slot — called a keyway — cut into both a rotating shaft and the hub of the component mounted on it, such as a pulley, sprocket, or drive coupling. Its job is to prevent the hub from rotating independently on the shaft by creating a positive mechanical lock between the two. When a square key shears, deforms, or works loose, the shaft spins freely inside the hub, killing power transmission to the driven component entirely. On compaction equipment this can mean loss of vibratory drive or propulsion; on a light tower it can affect the generator drive. Replacing the key with a correctly dimensioned OEM part restores full mechanical engagement and protects the keyway surfaces from further damage.
Part Details
| Part Number | 5000159261 |
|---|---|
| Old Part Number | 0159261 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Square 8Mm Key |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD16-90 Vibratory Roller | RD16-90 | 5000620060, 5000620127, 5000620799 |
| RD 16-100 | RD16-100 | 5000620402, 5000620798 |
| Vibratory Trench Roller | RT82-SC2 | 5000620530, 5000620293, 5000620367, 5000620525, 5000620528, 5000620529, 5000620526, 5000620527 |
| Vibratory Trench Roller | RT82-SC2 EU | 5000620845, 5200003107 |
| Vibratory Trench Roller | RT56-SC2 | 5000620294, 5000620368 |
| Vibratory Trench Roller | RT56-SC2 EU | 5000620844 |
| LTN6L, KOHLER (LOMBARDINI) | LTN6L | 5000620117, 5000620121, 5000620727, 5000620550, 5000620552, 5000620119, 5000620120, 5000620553, 5200004090, 5200004768, 5200012438, 5200022990, 5200017094, 5200017095, 5200022155, 5100027056 |
| LTN6L-P LIGHT TOWER,60 HZ | LTN6L-P | 5000620297 |
| Vibratory Trench Roller | RT82-SC | 5000009025, 5000620365, 5000620324, 5000620353, 5000620480, 5000620481, 5000620482 |
| Vibratory Trench Roller | RT56-SC | 5000009026, 5000620366 |
| RTLx-SC3 TRENCH ROLLER,GRN | RTLx-SC3 | 5200019251, 5200019250, 5200019254, 5200019252, 5100018515, 5100018516, 5200019253, 5100038346, 5100045091, 5100052332, 5100052269 |
| RTL82-SC3 ROLLER,SMOOTH DRUM | RTL82-SC3 | 5200019234, 5200019238, 5200019232, 5200019233, 5200019235, 5200019236, 5200019237, 5200019239, 5200022541 |
| LTN6L 50 Hz Non CE. Custom | LTC6L | 5000620559 |
| Trench Roller | RTx-SC2 EU | 5100028378, 5200008540, 5100052330 |
| LTN6L-V LIGHT TOWER,50HZ | LTN6L-V | 5200002720, 5200002721, 5200002716, 5200002717, 5200002718, 5200002719, 5200017102, 5200019283 |
| RTx-SC2 TRENCH ROLLER | RTx-SC2 | 5200008538, 5200008539, 5200018044, 5200018329 |
| LTN6L-V S, KOHLER (LOMBARDINI) | LTN6L-V S | 5200018536, 5200018539, 5200018573, 5200018552, 5200023687, 5200023688, 5200023689, 5200018576 |
| Light Tower | LTC4L | 5000009375, 5000009377, 5000009379, 5000009485, 5000009311 |
| LTN6LE-V 50 Hz CE 230 V LED | LTN6LE-V | 5200019285, 5200019140 |
| Light Tower with Power Winch | LTC4L-P | 5000620018 |
| LTN6L 50 Hz CE- RACKED | LTN6LE | 5200019142, 5200019143, 5200019141 |
| DPU80Lec770 | DPU80Lec770 | 5100026787 |
| DPU110Lec870 | DPU110Lec870 | 5100026869 |
| DPU80Lec670 | DPU80Lec670 | 5100027032 |
| DPU110Lec970 | DPU110Lec970 | 5100027035 |
| DPU90Lec670 | DPU90Lec670 | 5100027534 |
| DPU90Lec770 | DPU90Lec770 | 5100027536 |
| E3000 | E3000 | 5100055568, 5100056441, 5100056440 |
| DPU80Lem770 | DPU80Lem770 | 5100018444 |
| DPU110Lem870 | DPU110Lem870 | 5100018445 |
| DPU80Lem670 | DPU80Lem670 | 5100024695 |
| DPU110Lem970 | DPU110Lem970 | 5100024696 |
| DPU90Lem770 | DPU90Lem770 | 5100024731 |
| DPU110Lec970 US | DPU110Lec970 US | 5100026784 |
| DPU80rLec670 | DPU80rLec670 | 5100027033 |
| DPU80rLec770 | DPU80rLec770 | 5100027034 |
| DPU90Lec770 US | DPU90Lec770 US | 5100028357 |
| DPU80rLem670 | DPU80rLem670 | 5100024697 |
| DPU80rLem770 | DPU80rLem770 | 5100024698 |
| DPU110Lem970 US | DPU110Lem970 US | 5100024730 |
| DPU90Lem770 US | DPU90Lem770 US | 5100024732 |
| DPU110rLec970 | DPU110rLec970 | 5100027036 |
| DPU110rLec870 | DPU110rLec870 | 5100027077 |
| DPU110rLem970 | DPU110rLem970 | 5100024699 |
| DPU110rLem870 | DPU110rLem870 | 5100026697 |
| DPU110rLec970 US | DPU110rLec970 US | 5100026786 |
| DPU90rLec770 US | DPU90rLec770 US | 5100028359 |
| DPU110rLem970 US | DPU110rLem970 US | 5100026785 |
| DPU90rLem770 | DPU90rLem770 US | 5100028358 |
| DPU110Lekc970 | DPU110Lekc970 | 5100034515 |
| Engine/Generator cpl. | Engine/Generator cpl. | 5100039560 |
| Soil and Asphalt Compaction | CB14B-900 | 5200004071, 5200004073, 5200004074, 5200005252, 5200019030 |
| Soil and Asphalt Compaction | CB14B-1000 | 5200004072, 5200004688, 5200019031 |
| Light Tower | LTV6L | 5100039607 |
| Trench Roller | HTC15 | 5100065571 |
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.
