180/400 Crosman Valve Rebuild Kit
180/400 Crosman Valve Rebuild Kit

Our Price: $29.00

Quantity in Stock:8

Product Code: CR180VAREKI

Valve Stem Rebuild components as well as a complete seal set for Professional Rebuild of the Crosman 400, 180 or 187. We use 100% Polyurethane seals so our guns DON'T Leak. Made in USA by Mac1. A propane torch can be very helpful to get the brass head to separate from the steel stem. The seal fits in the brass head and you use a 1/8" hole in a anvil to drive the head onto the stem. It is a good policy to use a permanent thread locker in the brass head for insurance. Once the head is pressed together it can be trued and faced off to ready it for use. Heat the entire gun up to toasty when you first charge it so the seals will be supple and the pressure will be high. Making sure there is no damage to the valve seat where the seal sits is very important as the Mac1 seals are hard enough so you can leave the gun charged all the time. Getting it to seal initially can be impossible if there is any seat irregularity. Polishing the seat is often required to remove any scratches or abuse. If you use the parts that make for the most reliable repairs imaginable a DIY project can be the best investment you ever made in an airgun. Quality parts last. Going low budget is a waste of your time and $. Image shows an assembled Exhaust valve but this kit does not include the steel stem. The factory steel stem needs to be reused.
Crosman Valve Stem Rebuild HowTo

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