Small service kit for Hill MK1 and MK2 pumps includes 3 high pressure seals. A classic symptom of high-pressure seal damage is piston stroke resistance. To extend the life of the seal, we recommend using only high-quality silicone petroleum jelly for lubrication and pumping slowly with 15-minute breaks after every 40 pumps. Attention, the set is not intended for pumps MK3 and MK4, but only for older models MK1 and MK2.
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