Description

When you’re hauling heavy loads down hillsides or making emergency stops on rural roads, there’s nothing more important than brakes that respond the instant you press the pedal. This brake master cylinder is the heart of your hydraulic brake system, converting mechanical force from your brake pedal into the hydraulic pressure that gives you reliable, responsive braking power when it matters most. Whether you’re working steep pastures with your Agrostar 6.31 or road-transporting with a loaded trailer behind your Freisicht model, you need that confident stopping power.

What You’re Getting

Hydraulic system that multiplies your pedal force, delivering powerful braking performance even with heavy loads or challenging terrain
Precision-machined cylinder bore ensures smooth piston operation and reliable pressure generation
Integrated fluid reservoir maintains proper brake fluid levels for consistent performance
20mm bore size matches your factory specifications exactly
Uses DOT 4 brake fluid for optimal hydraulic performance

Built for Real Farm Work

This master cylinder fits all Deutz Agrostar models from the 4.61 through 6.61, plus the Agrostar Freisicht series from 4.68 to 6.38. These are serious work tractors – whether you’re running a loader operation, pulling implements across rolling terrain, or using differential braking for tight turns in the field. Proper brake function is essential for differential braking during sharp field turns, emergency stopping situations, parking on inclines, and maintaining control during transport operations.

Made to Last

This unit features heavy-duty construction that withstands extreme agricultural operating conditions, with robust internal seals that won’t deteriorate from constant pressure cycles or prolonged brake fluid exposure. Brake master cylinders take serious abuse on farm tractors – they’re exposed to extreme temperatures from freezing winter mornings to scorching summer engine heat, and this unit is built to handle it all.

Installation Notes

The unit requires proper brake fluid filling and system bleeding for optimal performance – have fresh DOT 4 brake fluid on hand and start bleeding with the wheel furthest from the master cylinder, working your way closer. This is also the perfect time to check all brake lines and wheel cylinders for any signs of wear or leaks. Remember, the companion repair kit 54886 is available if you need to rebuild this cylinder down the road.