oil field products oil field products Wilson Senior single drum Service Rig Wilson Senior single drum Service Rig , 40 foot mast ,dog style clutches instead of friction clutches , works from surface only , good for pulling tubing and rods ,it will pull range 2 . Unit runs off of a Ford V8 ,302,with 4 speed transmission . The unit is sold un mounted . Wichtex double drum service rig, 7X8 single-pole, the main shaft has been rebuilt, new single line sheave, will pull range 3, approximately 2,200 feet of 7/16-inch sand line, might need to be replaced, will hold 3,000 feet. Powered by a Chevy 250, 6-cylinder gas engine, 4-speed transmission with reverse, no truck. Also has a Guiberson hydraulic oil saver and Cavins depthometer.