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

The Bedford 20-1815 is a direct-fit replacement pump repair kit for Graco 3600, 4100, 5100, 5300, and 6100 pump models, engineered to restore full operational capacity during routine maintenance or emergency service calls.

Pump rebuild specialists and spray equipment technicians rely on comprehensive kits like this to address wear patterns across multiple pump generations in a single service event. Professional painting contractors and equipment service crews benefit from having all necessary internal components on hand, reducing downtime when these mid-range Graco pumps require restoration.

Common reasons for replacement:

• Pressure inconsistency or gradual output loss after extended operating hours, indicating internal seal degradation or packing wear
• Fluid leakage from pump body seams, shaft ports, or around the displacement chamber, signaling failed seals or worn packings
• Stuttering spray patterns or interrupted flow caused by worn check valves or damaged internal passages
• Loss of prime or inability to reach rated PSI, typical when component sets deteriorate across multiple internal chambers

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

Replacement for: Airlessco 187-040, Graco 865-672.

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.