Description
Overview:
The Wickham Diaphragm 4 Lug (900) is a heavy-duty replacement diaphragm used in small plant, site machinery and industrial equipment where a flexible membrane is needed to transfer motion or isolate vibration. Made from a durable elastomer compound, typically fabric-reinforced for strength, it provides an airtight and fluid-tight seal while flexing repeatedly in service. The 4‐lug pattern allows secure mounting, and its approximate 5 1/2 inch (about 140 mm) centre hole diameter supports common hub and housing sizes. A lug-to-lug measurement of 16 inch (about 406 mm) helps confirm fitment against existing hardware. Supplied under MPN 836 900, this part restores efficient drive or pumping action in machines that rely on a diaphragm coupling or membrane, helping reduce downtime and maintain consistent performance on site.
Key Features:
- 4‐lug design for positive, stable attachment to compatible housings and hubs
- Centre hole approximately 5 1/2 inch (about 140 mm) for correct seating and alignment
- Lug-to-lug measurement approximately 16 inch (about 406 mm) for size checking against the old part
- Tough elastomer construction for wear resistance and long service life under vibration
- Flexible membrane action to maintain sealing while transferring motion or pressure
- Helps restore lost performance caused by cracked, brittle or perished diaphragms
- Suitable for a range of construction and industrial machines using a 4‐lug diaphragm layout
- Straightforward to fit when replacing a like-for-like diaphragm; no special tools usually required
- Supports reliable operation by maintaining correct coupling, sealing and damping characteristics
- Supplied to MPN 836 900 for clear identification
Typical Applications:
Commonly used in site equipment such as compactors, diaphragm pumps, rammers, and other small plant where a flexible membrane couples drive components or provides a pressure barrier. Suitable for maintenance tasks involving vibration isolation, drive coupling, or fluid/air separation in construction, landscaping, and light industrial environments. Always compare the dimensions (centre hole and lug spacing) to the original diaphragm before fitting.
Also known as:
4‐lug diaphragm plate, membrane diaphragm, flexible pump membrane, coupling diaphragm, four‐lug membrane disc, sealing diaphragm, drive diaphragm, rubber diaphragm insert, machinery diaphragm, replacement diaphragm for site equipment.
Product Specifications
| L&S Part No. | 836 900 |
|---|---|
| Unit of Sale | 1 |
