What combine did you run before the 1688?

 

Mf 860

 

We got about 2000 hrs on ours and we have had very little trouble ours. Just watch the pickups we have done a fair bit of welding on ours also watch the support bar between the sives we broke ours twice and the it goes into the return auger and wrecks it. But for the most part they are good combine with alot of power and capicty.

 

check where the hyd pump mounts to the engine so see if its wet and make sure there is no clip for a wire in between there or else it wears the shaft inside the pump ( fixing ours as we speak), if your pick up doesn't have chains supporting the belt part of the pickup to the head it's self you should probly invest in some

 

We used to go by rotor RPM. Typically under load the RPM would drop a certain amount before you lost power. The combine tries to keep the rotor rpm up, but it still will slow slightly under load. If the rotor was at 860 or so, that'd often be around 810 or 820 for us, if I recall correctly. Different crops will affect the rotor differently of course. But you should be able to determine proper loading by watching this.

 

Same as most machines belts bearings etc. check out harvest services website for adjusting properly. Keeping rotor full key to a good thresh in hard to thresh crops. Change rad hoses and engine belt. They blow and time for a new engine. Throttle vibrates and you've dropped a valve so shut her down ASAP.

 

Check around feeder housing pivot points for cracks. We had to beef ours up alot over the years. We also had to sleeve the front axle tube. The rear axle breaks at the pivot. Check the pulley between gear box and hydrostatic pump for wear on the splines. After 5000hrs ours grabbed a piston 3/4 of the way through harvest, she's off to the wreckers this week