The Wacker Neuson Extension Spring is a genuine OEM component designed for CT36 and CT48 series walk-behind concrete power trowels. As a direct factory replacement, this spring is manufactured to the exact specifications required by your machine, ensuring correct tension and reliable operation across all CT36 and CT48 model variants — including AGP, ADP, AGT, ADT, AVP, and AVT configurations in both standard and CE editions. Genuine OEM sourcing means the matches the original part in material grade, coil count, and load rating — no guesswork, no adaptation. Keep this part on hand for scheduled maintenance or unplanned field repairs to keep your trowel performing as intended.
Key Features
- Genuine OEM Tension Rating — Manufactured to the exact coil geometry and load specification of the original spring, maintaining correct mechanical tension throughout the trowel's operating range.
- Direct Hook-for-Hook Replacement — Engineered to mount to the same attachment points as the original, allowing straightforward installation without reworking surrounding hardware.
- Broad CT-Series Fitment — Confirmed fit across CT36 and CT48 walk-behind power trowels, covering AGP, ADP, AGT, ADT, AVP, and AVT variants in both standard and CE configurations.
- Consistent Spring Return Force — A correctly tensioned extension spring maintains smooth, even blade pitch response; a fatigued or broken spring causes erratic pitch control and uneven concrete finishing results.
- Fuel and Variable Speed Model Coverage — Compatible with gasoline, propane, and variable speed CT36 and CT48 trowel variants, making this a versatile stocking part for mixed fleets.
An extension spring stores and releases mechanical energy to maintain tension between two connected components, pulling them back toward a neutral position after displacement. In a walk-behind concrete power trowel, extension springs are typically used within the pitch control linkage or guard assemblies, providing the return force needed to keep moving parts properly seated and responsive. When an extension spring stretches beyond its elastic limit, corrodes, or breaks, the affected linkage loses its return force — resulting in sluggish or uncontrolled pitch adjustment, inconsistent blade pressure, and a finished concrete surface that fails to meet flatness tolerances.
Part Details
| Part Number | 5000085350 |
|---|---|
| Old Part Number | 0085350 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Extension Spring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 915mm/36in CE Walk-behind Trow el | CT36AGP | 5000007596, 5000007595 |
| 915mm/36in CE Walk-behind Trow el | CT36AGP-E | 5000008036, 5000008026 |
| 1220mm/48in Walk-behind Trowel | CT48AGP | 5000007602, 5000007603 |
| 1220mm/48in CE Walk-behind Tro wel | CT48AGP-E | 5000008031, 5000008032 |
| 1220mm/48in Walk-behind Trowel | CT48ADP | 5000007598, 5000007599, 5000008199 |
| 1220mm/48in CE Walk-behind Tro wel | CT48ADP-E | 5000008027, 5000008028 |
| 1220mm/48in CE Walk-behind Tro wel | CT48AGT-E | 5000007601, 5000008020 |
| 1220mm/48in Walk-behind Trowel | CT48AGT | 5000008019, 5000008041 |
| 915mm/36in CE Walk-behind Trow el | CT36AGT-E | 5000007594, 5000008012 |
| 1220mm/48in CE Walk-behind Tro wel | CT48ADT-E | 5000007597, 5000008016 |
| 915mm/36in CE Walk-behind Trow el | CT36AGT | 5000008014, 5000008011 |
| 1220mm/48in Walk-behind Trowel | CT48ADT | 5000008015, 5000008040 |
| 1220mm/48in Variable Speed Wal k-behind Trowel | CT48AVP | 5000009219, 5000009220 |
| 1220mm/48in Variable Speed Wal k-behind Trowel | CT48AVT | 5000009217, 5000009218 |
| 915mm/36in Variable Speed Walk #NAME? | CT36AVP | 5000009235, 5000009236 |
| 915mm/36in Variable Speed Walk #NAME? | CT36AVT | 5000009233, 5000009234 |
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.
