Kit - 3600, 4100, 5100, 5300, 6100 Pumps

This pump repair kit is a direct-fit replacement for Airlessco part 187-042 and the OEM pump packing used in Airlessco 3600, 4100, 5100, 5300, and 6100 Pumps sprayers. It is commonly installed when pumps lose pressure, begin leaking, or require a full rebuild due to normal wear.

Common reasons this kit is replaced:

• Pressure drop during continuous spraying
• Fluid bypass inside the pump assembly
• Visible leakage around piston rod area
• Scheduled rebuild on high-use contractor equipment

This kit is frequently used by professional contractors to restore pump performance on Airlessco sprayers. All components are manufactured to OEM-equivalent dimensions to ensure proper sealing, durability, and reliable operation in demanding jobsite conditions.

Manufactured to OEM-equivalent dimensions for proper fit and performance. Compatible Airlessco equipment models are listed in the Compatible Equipment section below, where available.

Replacement for: Airlessco 187-042.

BEDFORD® and BEDFORD PRECISION PARTS™ are proprietary marks of Bedford Precision Parts, LLC (“Bedford”). All other listed marks are proprietary to their respective owners and are not affiliated with Bedford.