Description

That oil puddle under your David Brown isn’t going away on its own, and every drop hitting the ground means your clutch is getting closer to slipping when you need it most. When your rear crankshaft seal fails, you’re looking at contaminated clutch plates and expensive repairs if you don’t catch it early. This precision 115x140x12mm seal stops the leak at its source, keeping engine oil where it belongs and your clutch disc clean and gripping.

What You’re Getting

Double-lip design provides superior oil retention even under high crankshaft speeds
High-grade rubber compound resists heat and chemical breakdown from modern oils
Steel reinforcement maintains proper shape under engine oil pressure
Garter spring ensures consistent contact as the seal wears over time
Precision dimensions for exact fit on David Brown crankshaft journals

Built for Real Farm Work

This seal handles the demanding conditions inside your David Brown engine, where the crankshaft spins thousands of RPM while oil pressure pushes against the seal lips. Whether you’re running a 770 for light farm duties, a 990 for general field work, or pushing a 1690 through heavy tillage, this seal prevents oil from migrating to the clutch housing where it causes slippage and damage.

Made to Last

The modern rubber compound in this seal outperforms original equipment, staying flexible through temperature swings while resisting the chemical attack from today’s engine oils. The steel reinforcement prevents the distortion that causes leaks, especially critical given the oil pressure these seals face at the rear of the crankshaft.

Installation Notes

Rear main seal replacement requires splitting the tractor—not a quick roadside fix, but necessary when oil starts contaminating your clutch. Check the crankshaft surface carefully for scratches that’ll cause the new seal to leak immediately. A light polish with fine emery cloth smooths minor imperfections. Install square and to proper depth using a seal driver, never hammer directly on the seal. While you’re split, inspect your clutch disc for oil contamination and replace if needed.