Hydraulic lock is often overlooked when starting diesels in cold weather. Equipment designed with the hydraulic pump direct connected/coupled to the engine will turn over less easily and at a slower RPM because of the increased drag from the cold oil in the hydraulic system. The result may be that the diesel engine does not spin fast enough to start readily. Improve cold weather starting by installing a Universal Preheater (sized for the tank capacity) on the outside of the hydraulic reservoir as close to the pick-up tube that is inside the tank as possible. This position provides the heated oil as the first oil available to the hydraulic pump. The heated hydraulic oil helps to reduce the drag on the engine at startup and makes starting easier. To improve cold weather starting and operations even more, install the Universal Filter Preheater on the hydraulic filter housing to avoid filter bypass and supply even more hot oil directly to the hydraulic pump. Available in 12v, 24v and in dual grid voltages in the same Preheater 12v/120v, 24v/120v and in regular voltages 120v and 240v. Two springs and nylon ties hold it in position. Diesel engines must have a fast spin to create the c...