The Multiquip EM20403 is a genuine OEM Output Shim 0.003 Thick designed for a wide range of Multiquip and Whiteman walk-behind power trowels, including CA, JA, BA, HPHA, and HPLA series machines. As a factory-sourced component, EM20403 ensures the correct stack height and bearing preload are maintained during gearbox service or overhaul. This shim is confirmed to fit models including CA4HM, CA4HC, CA-4-4H, CA4.4HM, JA-Series, BA-Series, HPHA36C5H, HPHA46411H, HPHA-46-Series, HPLA46411H, and HPLA-HPHA-36, among others.
Key Features
- Precision-Ground Thickness: — Manufactured to an exact 0.003-inch specification, ensuring correct output shaft preload and alignment during gearbox assembly.
- Genuine OEM Sourcing: — A factory-original Multiquip component that matches the original shim in material grade and dimensional tolerance — no guesswork on fitment.
- Broad Trowel Series Compatibility: — Fits CA, JA, BA, HPHA, and HPLA series Multiquip and Whiteman walk-behind power trowels, covering a wide range of blade diameters and configurations.
- Critical for Proper Gearbox Function: — Correct shimming maintains output shaft end-play within spec; an incorrect or worn shim leads to excessive gear wear, vibration, and premature bearing failure.
- Direct Service Replacement: — Drops into gearbox overhaul and bearing replacement procedures exactly as the original, with no additional modification to the output shaft stack required.
A shim is a precisely manufactured spacer used to set and control the axial clearance — or end-play — of a rotating shaft within a gearbox or drive assembly. In a walk-behind power trowel, the output shim sits within the gearbox to establish the correct preload on the output shaft bearings, keeping the shaft running true under load. When a shim is worn, missing, or the wrong thickness, the output shaft develops excessive play, which accelerates bearing wear, increases vibration at the trowel blades, and can ultimately lead to gearbox failure if left uncorrected.
Part Details
| Part Number | 20403 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Output Shim 0.003 Thick |
Compatibility & Fitment
| Name | Model |
|---|---|
| International Walk-Behind Power Trowels | CA-4-4H |
| Saws | SCT36 |
| Walk-Behind Trowels | HPLA46411H |
| Walk-Behind Trowels | BA-SERIES |
| Saws | SCT36ANDSCT46 |
| Saws | SCT46 |
| Heavy Duty Series | HPHA36C5H |
| Walk-Behind Trowel | HPHA-46-SERIES |
| Walk-Behind Trowels | HPHA46411H |
| Power Trowels | CA4.4HM |
| C and CA Series | CA4HC |
| Whiteman Walk-Behind Power Trowels | CA4HM |
| 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.
Multiquip