The Multiquip 20403 Output Shim 0.003 Thick is a genuine OEM shim designed for SCT36, SCT46, BA Series, JA Series, CA Series, and HPLA/HPHA Series walk-behind power trowels. As a direct Multiquip OEM replacement, part 20403 is manufactured to the exact thickness specification required for proper gearbox and output shaft alignment across this broad range of concrete finishing equipment. This shim is confirmed to fit models including SCT36, SCT46, CA4HC, CA4HM, CA-4-4H, CA4.4HM, HPHA46411H, HPLA46411H, HPHA36C5H, and related walk-behind trowel configurations.
Key Features
- Exact Thickness Tolerance — Precisely ground to 0.003 inches, ensuring correct output shaft end-play and bearing preload for smooth trowel operation.
- Genuine OEM Part — Sourced directly from Multiquip, this shim meets the original design specification for dimensional accuracy in gearbox assemblies.
- Broad Walk-Behind Trowel Compatibility — Fits SCT36, SCT46, BA Series, JA Series, CA Series, and HPLA/HPHA Series models, covering a wide range of Multiquip and Whiteman walk-behind power trowels.
- Critical Alignment Component — Correct shimming of the output shaft prevents premature gear and bearing wear, maintaining consistent blade pitch response and drive efficiency.
- Drop-In Fitment — Matches the original shim profile for straightforward installation during gearbox service or rebuild without additional machining.
An output shim is a precision-thickness spacer used within the gearbox or drive assembly of a walk-behind power trowel to control the axial position and end-play of the output shaft. By setting the correct clearance between rotating components, the shim ensures that gears and bearings operate within their designed load range, reducing internal stress and wear. When a shim of incorrect thickness is used — or when an original shim is lost or damaged during service — the result can be excessive shaft movement, accelerated bearing failure, or inconsistent blade pitch performance across the trowel head.
Part Details
| Part Number | 20403 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Output Shim 0.003 Thick |
Compatibility & Fitment
| Name | Model |
|---|---|
| Saws | SCT36 |
| Saws | SCT46 |
| Walk-Behind Trowels | HPLA46411H |
| Walk-Behind Trowels | HPHA46411H |
| Walk-Behind Trowels | BA-SERIES |
| Power Trowels | CA4.4HM |
| Saws | SCT36ANDSCT46 |
| C and CA Series | CA4HC |
| International Walk-Behind Power Trowels | CA-4-4H |
| Heavy Duty Series | HPHA36C5H |
| Walk-Behind Trowel | HPHA-46-SERIES |
| Walk-Behind Trowels | JA-SERIES |
| Walk-Behind Trowels | HPLA-HPHA-36 |
| Whiteman Walk-Behind Power Trowels | CA4HM |
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.
