Does crosman corp rebuild or repair Benjamin pump air pistols?

Yes and No. depending on the model and the warranty. But they do offer a free service to locate shops that repair older air guns. Several shops around the country make a living rebuilding air guns. Like MAC1 in Gardena California. The largest reseller of air guns "PYRAMYD Air" also repairs older air guns. See the links below or do a search on the web for "Air Gun Repair"