Re: Frozen 806 Hydraulics Revisited

Posted by Owen Aaland on February 18, 2007 at 20:39:21 from (65.165.246.11):

In Reply to: Re: Frozen 806 Hydraulics Revisited posted by JayWalt on February 18, 2007 at 18:45:10:

Hy-Tran will hold a lot of water in suspension. In freezing temperatures it is posible for this water to form ice crystals that will plug the filter and bypass screen. An indication of this is that the hydraulics may work for a short time when the tracor is first started and the quit, usually within a minute. If you were to pull the filter you would see the ice as the oil drained off the screen. This can happen even before the oil gets milky colored.

When changing the fluid in the trans/diff it is also a good idea to change the final drive fluid also. 06 models came with a separate reservoir and fill plugs. They is a cup type plug on the inside of the inner axle bearing bore and a seal on the brake pinion shaft. When servicing the final drives on these tractors it is advised to leave the plug and seal out and to drill a couple of holes through the rear housing so the oil can get through to the final drives and outer axle bearings. When this is done the fill/check plug on the axle housing should have the square head sawed off to identify this change.

If you drain the final drives and you do not know if you tractor has been upgraded, simple fill the transmission as normal then crack the final drive drain plugs again to make sure oil has filled the housings. (Be sure to drain enough to be sure it is new oil and not just more that has found it was to the drain plug). If not you will need to fill the final drives through the fill/check plugs.

It is not unusual to find one side upgrades but not the other so be sure to check both sides.

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