The Multiquip EM20404 Output Shim 0.005 Thick is a genuine OEM shim designed for walk-behind power trowel models across the CA, JA, BA, and HPHA series, including CA4HC, CA4HM, HPHA36C5H, HPLA46411H, HPHA46411H, and SCT36 and SCT46 saw models. As a precision-thickness shim, EM20404 ensures proper gear mesh and output shaft alignment within the gearbox assembly, keeping tolerances exactly where the factory intended. Sourced directly from Multiquip, this is the same part installed at the factory — no guesswork on fitment or thickness.
Key Features
- Precision-Thickness OEM Shim — At exactly 0.005 inches thick, this shim meets the original engineering tolerance for output shaft preload and gear mesh alignment in Multiquip walk-behind trowel gearboxes.
- Drop-In Gearbox Fit — Engineered to seat correctly within the output shaft stack, matching the original shim position without additional machining or adjustment.
- Broad Walk-Behind Trowel Compatibility — Confirmed fitment across CA, CA4HC, CA4HM, JA-Series, BA-Series, HPHA46, HPLA36, HPHA36C5H, HPLA46411H, HPHA46411H, SCT36, and SCT46 models.
- Protects Gearbox Longevity — Correct shim thickness prevents excessive gear lash and shaft endplay; an incorrect or worn shim accelerates bearing and gear wear throughout the output assembly.
- Genuine Multiquip OEM Part — Supplied by Multiquip under part number EM20404, ensuring exact material specification and thickness accuracy that aftermarket equivalents may not consistently deliver.
An output shim is a thin, precisely manufactured spacer placed within a gearbox or drive assembly to set the correct axial position and preload of the output shaft. In walk-behind power trowels, the output shaft drives the trowel blade spider arms, and the shim stack determines how tightly the shaft and associated gears are loaded against each other. If a shim is missing, damaged, or replaced with an incorrect thickness, the result is increased gear lash, vibration, and accelerated wear on bearings and gears — eventually leading to gearbox failure. Using the correct 0.005-inch shim during a rebuild or reassembly is essential to restoring the output assembly to spec.
Have questions about fitment or need help confirming compatibility with your specific trowel model? Contact the DHS Equipment parts team for assistance.
Part Details
| Part Number | 20404 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Output Shim 0.005 Thick |
Compatibility & Fitment
| Name | Model |
|---|---|
| International Walk-Behind Power Trowels | CA-4-4H |
| Saws | SCT36 |
| Saws | SCT46 |
| Walk-Behind Trowels | HPLA46411H |
| Walk-Behind Trowels | HPHA46411H |
| Walk-Behind Trowels | BA-SERIES |
| Power Trowels | CA4.4HM |
| Walk-Behind Trowels | JA-SERIES |
| Saws | SCT36ANDSCT46 |
| C and CA Series | CA4HC |
| Whiteman Walk-Behind Power Trowels | CA4HM |
| Heavy Duty Series | HPHA36C5H |
| Walk-Behind Trowel | HPHA-46-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.
