Hydraulic Brake and Clutch Pressure Bleeding System - MV6840

In this review of the MV6840 hydraulic brake and clutch bleeding system the bottom line is simple: it is a professional-grade, single-operator solution for flushing brake fluid and servicing hydraulic clutches. The 1.2 gallon reservoir and manual pump make long jobs less fiddly and allow hands-free access to bleed screws once pressure is set. For DIY mechanics, mobile technicians, and small shops that need a durable, portable pressure bleeder, the MV6840 delivers consistent pressure and broad adapter coverage without requiring a second person.

Key Features

• High-capacity reservoir: The 1.2 gallon reservoir reduces refills during full-system flushes, which speeds up multi-wheel and ABS bleeding jobs.
• Seven master cylinder adapters: Interchangeable adapters provide connections for a wide range of cars, SUVs, motorcycles, ATVs, and light commercial vehicles.
• Quick-change connections: Push-fit connectors and a pressure relief valve make setup and pressure adjustments fast and keep the system safe under load.
• Manual pump with gauge: The integrated pump and pressure gauge let the operator control and monitor system pressure for repeatable bleeding results.
• Durable storage case: A heavy-duty case keeps the dispenser, adapters, and hoses organized for mobile work and easy storage in a shop bay.

Who It's For

The MV6840 is aimed at DIY enthusiasts who prefer one-person brake bleeding, mobile mechanics who need a portable kit, and small professional shops that perform routine brake fluid service and ABS system flushing. Its hands-free reservoir and pressure control reduce the need for an assistant and make sequential bleeding more efficient.

Owners of vehicles with atypical master cylinder fittings should verify adapter compatibility before purchase, since a few customers reported fit issues with specific models. If a user requires a pure vacuum bleeder rather than a pressure system, another tool may be more suitable.

Pros & Cons

Pros

• High-capacity 1.2 gallon reservoir minimizes refill interruptions on full-system flushes.
• Seven adapters broaden compatibility across cars, motorcycles, ATVs, and light trucks.
• Quick-change connectors and a pressure relief valve simplify setup and improve safety.
• Carry case and robust construction make it practical for mobile technicians.

Cons

• Some users report occasional adapter fitment issues with specific master cylinders, so a test fit is recommended.
• As a pressure bleeder, it may not suit technicians who prefer vacuum-only systems for certain bleeding procedures.

Specifications

Product type	Hydraulic brake and clutch pressure bleeding system
Reservoir capacity	1.2 gallon (4.5 L)
Included adapters	Seven master cylinder adapters
Connections	Quick-change connectors with pressure relief valve
Includes	Manual pump with pressure gauge and storage case
Designed for	Brake calipers, master cylinders and clutches on cars, motorcycles, ATVs

Our Verdict

The MV6840 is a reliable, value-oriented pressure bleeder suited to DIYers and pros who need a one-person solution for brake and clutch service. Its large reservoir, multiple adapters, and sturdy case make it a practical choice for full-system flushes and mobile work, though buyers should confirm adapter fit for uncommon master cylinders.

Frequently Asked Questions

Can one person use this to bleed brakes?
Yes. The pressurized 1.2 gallon reservoir and pump let a single operator maintain pressure and access bleed screws hands-free.

Will the included adapters fit every vehicle?
The kit includes seven master cylinder adapters to cover many applications, but a small number of vehicles may need a different adapter or a test fit to confirm compatibility.

Is the unit safe to use on ABS systems?
Yes. The controlled pressure via the gauge and the pressure relief valve make it suitable for flushing ABS and hydraulic clutch systems when used according to instructions.