Description

This is the comprehensive Factory Maintenance Kit for the Comet MP30 series diaphragm pumps. It is designed to restore full suction and pressure performance by replacing the primary wear components. This kit features high-quality internal parts engineered to withstand the rigorous demands of agricultural and industrial spraying.

Kit Features

• Complete Overhaul: Includes both the diaphragms and the check valve assemblies, which are the two most critical components for maintaining flow and pressure.

• NBR (Buna-N) Construction: Standard kit components are typically made of NBR, providing excellent resistance to oil-based chemicals, fertilizers, and common pesticides.

• OEM Precision: Genuine Comet parts ensure a perfect fit and consistent seal, preventing the internal “bypass” leaking that causes pressure drops.

Kit Contents

The 5026.0080.00.DS kit generally includes the following items:

When to Use This Kit

• Low Pressure: If your MP30 is struggling to reach its rated 435 PSI despite the engine running at the correct RPM.

• Contaminated Oil: If the oil in the pump’s sight glass looks milky (white/grey), it indicates a ruptured diaphragm has allowed water/chemicals into the crankcase.

• Heavy Vibration: Excessive shaking in the discharge hose usually points to a failed check valve or a worn accumulator diaphragm.

• Annual Maintenance: Professional operators typically install this kit every 300–500 hours of use to prevent mid-season breakdowns.

Installation Highlights

Pro Tip: When the diaphragms fail, the oil is often contaminated. You must flush the pump crankcase with a light oil or cleaning solvent and refill it with fresh 30W non-detergent oil when installing this kit.

1. Clean the Workspace: Ensure no dirt enters the pump manifold during disassembly.

2. Star Pattern Tightening: When re-installing the pump heads over the new diaphragms, tighten the bolts in a cross-pattern to ensure the pressure is distributed evenly across the seal.

3. Check Valve Orientation: Pay close attention to the direction of the check valves during removal; installing them upside down will prevent the pump from moving fluid.

4. Air Pocket Removal: After installation, run the pump with the regulator in the “bypass” (low pressure) position for a few minutes to bleed air out of the system.