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G-MAN
03-09-2002 18:27:29
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Re: Power Shift vrs Quad Range in reply to Rob, 03-09-2002 17:39:07
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Rob, either transmission is a good option. It really depends on what you want to use the tractor for. First of all a quad range has two shifter levers. One for range and one for speeds. This trans is also powershiftable between 1-2 and 3-4. It has ranges A-D. If I were using the tractor on a loader, I would go with the quad range as it will give you inline shifts between fwd and rev. Reverse 1-2 are also powershifts. When properly maintained, the perma-clutch that is used with a QR is nearly indestructible, it's oil cooled and hydraulically actuated. The powershift is also a good trans. It will only have 8 spds forward and 4 reverse on one lever. Instead of a clutch, it uses a torsional damper on the flywheel. The actual trans engagement is accomplished in the C1/C2/PTO clutch pack in the front of the trans. Once again, with proper maintenance, a PS will last a long time. I guess I should cover the 15 spd PS too. It is similar in construction to the 8 spd, but has a hydraulically actuated two speed built in, but still only one lever. It also has 4 reverse speeds. The clutch pack in a 15 spd is located on the engine flywheel. When you're looking at tractors, check the trans/hyd oil. If it is black at all, it will indicate a leaking rear main crank seal in a 15 spd PS or QR tractor. Also check to see if the hyd oil smells burnt. You might have them pull the filters and sump screen so you can inspect them also. The most common problem we see at our dealership is wear in the drive shaft bushings in 15 spds. This will cause a vibration you can feel in the floor at about 1500 rpm on up. Also, look for firm, positive shifts without being exceptionally jerky. Also, have the dealership check trans operating pressure and lube pressure on PS trannies. Check in all gears. Check clutch pressure in QR tractors. Also put the tractor (PS) in nuetral and open up the throttle. Look for creeping, this can indicate clutch pack problems. It is common for 15 spd tractors to rock against the park pawl though, especially with cold oil. Hope I was of some help with this book I wrote, feel free to e-mail me with any other questions.
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