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Pump Service Manual
HEADRINGS 22mm
2100279 General Pump Major rebuild kit for Hammerhead old style swivels
Compatible Pump Models
The Suttner ST-1500H is ideal when the unloader is unavailable
21 GPM 2200 PSI WHITE SPRING UNLOADER (2801) 20372/31421-001 Pump Service ManualThe 21 GPM unloader maintains full system pressure while running in by pass without full load on pump. Senses pressure built up from downstream flow changes and by passes flow to protect pump from overpressure. Minimum pressure fluctuations with alternating use of multiple guns. Multiple ports for convenient mounting. Color coded spring for easy identification and simple change from one model to another.
