Jan 15, 2006 / JM284 Pump Destructon #11 PineRidge Super Member Joined Oct 8, 2003 Messages 7,595 Location Northeast, Ohio Tractor LS-MT242HC Sounds to me like the pump is deadheading and there is no relief valve in the system to protect it.
Jan 16, 2006 / JM284 Pump Destructon #12 N n4807g Silver Member Joined Sep 14, 2005 Messages 177 Tractor Belarus 572, Farm Pro 8240 Go to the Chinese tractor forum and ask. There are Jinma Dealers on that forum that can help.