Reply to thread

Message: <blockquote data-quote="longeze" data-source="post: 47069" data-attributes="member: 6252"><p>Hi, Can anyone tell me why there is a 4way gearbox in my NewHolland L779 skidsteer connected to both hydrostatic drive motors as well as the hydraulic pump and engine? The hydrostatic drive systems I've seen on smaller equipment just couple the engine to a pump sometimes through a gearbox and the pump supplies the pressure to the wheel drive motors directly. If someone could explain the theory of operation of the 4way gearbox to me I'd be very much appreciative. The manual just skips over the subject. On another matter, I have to rebuild the Perkins 4.203.2 diesel prime mover. In the OEM parts manual, I notice that there are no exhaust valve guide seals listed or shown, only those for the intake valves. Is this common practice for diesel engines? What do you suggest? Thanks in advance for your time!</p></blockquote><p></p>