In March of 2004, Jereh's service group went to the spot of Dagang oilfield and overhauled the power system for the workover rig including overhauling the Cat 3408 engine and Allison 5961 transmission.

After the completion of the repairing,the equipment worked well and the customer highly praised the high ability of our service people.

Jereh resumed the obsolete-to-be Cat D348 engine successfully for Dagang oilfield

Jereh overhauled the Allison transmission for S&S.

Jereh successfully repair the Allison converter for Tuha oilfield