The Multiquip 20399 Input Shim 0.005 Thick is a genuine OEM replacement component designed for walk-behind power trowel models including the CA, JA, BA, and HDA series, as well as HPHA and HPLA series machines. Sourced directly from Multiquip, part 20399 delivers the exact thickness tolerance required for proper drivetrain alignment on compatible trowels. This shim is a direct-fit component confirmed across a broad range of Multiquip and Whiteman walk-behind trowel configurations including CA4HC, CA4HM, CA4.4HM, HPHA-46 series, HPLA46411H, and HPHA46411H models. When you need a precise OEM shim to restore correct input shaft clearance, the part is the correct part for the job.
Key Features
- Exact OEM Thickness: — Manufactured to the precise 0.005-inch specification, ensuring correct input shaft clearance and proper load distribution within the gearbox assembly.
- Genuine Multiquip Part: — Sourced directly from Multiquip, this shim meets the same material and dimensional standards as the original component installed at the factory.
- Broad Walk-Behind Trowel Compatibility: — Fits CA, JA, BA, HPHA, and HPLA series walk-behind trowels, covering a wide range of Multiquip and Whiteman power trowel configurations.
- Direct Drivetrain Alignment: — Installs in the input shaft position to set the correct axial clearance, preventing excessive gear wear and maintaining smooth power transfer to the trowel blades.
- Supports Proper Gearbox Function: — A worn or missing input shim allows shaft endplay that accelerates bearing and gear degradation; replacing with the correct 0.005-inch shim restores designed operating clearance.
An input shim is a thin precision spacer installed within the gearbox or transmission assembly to control axial clearance on rotating shafts. On walk-behind power trowels, the input shim sets the exact gap between components on the input shaft, ensuring gears and bearings operate within their designed tolerance range. When a shim is worn, compressed, or missing entirely, excess shaft movement creates uneven gear contact and accelerated bearing wear, which can lead to noisy operation, vibration, or premature gearbox failure.
For assistance confirming fitment for your specific trowel model, contact the DHS Equipment parts team.
Part Details
| Part Number | 20399 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Input Shim 0.005 Thick |
Compatibility & Fitment
| Name | Model |
|---|---|
| Walk-Behind Trowel | HPHA-46-SERIES |
| Walk-Behind Trowels | BA-SERIES |
| Saws | SCT36ANDSCT46 |
| C and CA Series | CA4HC |
| Saws | SCT36 |
| Saws | SCT46 |
| Heavy Duty Series | HPHA36C5H |
| Walk-Behind Trowels | HPLA46411H |
| Walk-Behind Trowels | HPHA46411H |
| Power Trowels | CA4.4HM |
| Whiteman Walk-Behind Power Trowels | CA4HM |
| International Walk-Behind Power Trowels | CA-4-4H |
| Walk-Behind Trowels | JA-SERIES |
| Walk-Behind Trowels | HPLA-HPHA-36 |
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.
