This is the official Busch CAP, OIL FILL, W/PRESSURE GAUGE (Part #94610002). It is a direct replacement part made for Busch R5 series vacuum pumps. This cap fits pump models from 0021 through 0100. It combines an oil fill cap with a built-in pressure gauge. This lets you add oil and monitor pump pressure from one convenient location .
this Busch Pressure Gauge (Part# 54500400). This gauge is often found on oil fill caps for R5 series pumps. Fits models like 0160B, 0250B, 0250C, 0250D, and more. Easy to read and simple to install.
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