When reinstalling your trumpet valves after oiling them, it is important that the numbers on the valves are forward facing. This ensures the tubing is aligned and allows air to flow through the horn.
YCR-2330, YCR-2310, YCR-2330, YCR-6330, YHR-8335, YHR-8620, YCR-9435
YFH-2310, YFH-631, YFH-8310, YFH-8315
YRT-4335, YTR-2330, YTR-2335, YTR-4335, YTR6335, YTR-6345, YTR-8335, YTR-8345, YTR-200AD, YTR-5335, YTR-8310, YTR-8340, YTR-9335
YMP-204, YMP-302, YBH-301, YBB-202, YSH-301, YSH-411
YBB-105, YBB-201, YBB-321, TBB-621, YBB-631, YBB-641, YBB-105, YCB-621, YCB-822, YEB-321, YEB-632, YFB-621-YFB-822
YEP-642, YEP-201, YEP-211, YEP-321, YEP-642, YEP-842, YEP-202