Pump Plunger Problem | SST
FAQ_ID:1000FAQ_Question:Why doesn't the plunger on my pump return to the starting position?
FAQ_Answer:Most plunger problems are due to either a missing washer or a broken/missing spring.
The washer is necessary to compress the spring. If this piece is missing, your plunger will not return. To order a washer, reference part number 82015. A well-used spring can become worn out or broken. When this happens, you may notice the plunger does not return as it should. Please check your owner's manual, or contact us, for the part number you will need to reference in ordering your replacement part.