Parts & Accessories

A worn part rarely announces itself clearly — an off-ratio spray pattern could point to a mix chamber, a clogged inline filter, a failing check valve, or a proportioner-side issue entirely unrelated to the gun. Before ordering a replacement part on a guess, isolate the symptom: a fan pattern that's changed shape but ratio still reads correct usually points to gun tip wear, while a ratio drift that shows up gradually over a job points more often to a filter starting to clog than to a sudden mechanical failure.

Keeping a simple failure log — what part failed, at roughly what hour count, on which gun/proportioner combination — pays off over time. Contractors who track this start to see patterns specific to their own equipment and job conditions, which turns future part orders from a guess into a scheduled replacement made before a failure costs a job day. If you're not sure what's actually failed, call our support line with the symptom before ordering — we'd rather help you order the right part once than ship three guesses.

At minimum, a truck-stock kit should cover the parts most likely to fail mid-job: one spare mix chamber matched to your primary gun, a full o-ring rebuild kit, a spare inline chemical filter, and a short spare section of heated hose or heater band for field repair. That short list covers the large majority of in-field failures we see reported, and all four fit in a single small parts box that rides along on every job without adding meaningful weight or clutter to the truck.

Crews running two or more rigs regularly should size the kit per rig rather than sharing one kit across a fleet — a shared kit means the part you need is exactly as likely to be on the other truck as the one in front of you, which defeats the purpose of carrying it in the first place.