1994 M1079 front hub under high pressure, anyone know why?

[Adventure Driven]

Hello All

So I have been working on my M1079 non stop for weeks doing a ton of maintenance to it. Coolant, thermostat, engine oil, both fuel filters, water separator, front and rear diffs, ATF conversion, fan belts, fan belt idlers, air filter, grease chassis, etc.

When I went to drain the front driver side hub I found it was under very high air pressure. I would guess 55-65 PSI. The passenger side was fine when I drained it, no pressure, have any of you heard of this problem? Any ideas on how to repair it?

Thanks so much

Seth

 

[snowtrac nome]

ctis seal leaking

 

[ramdough]

ctis seal leaking

That makes sense to me.


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[Andyrv6av8r]

So how could the hub hold pressure? Does the gear cavity not have a vent on it?

 

[kenet3621]

Could it be the change in altitude between SC low country and AZ mountains?

 

[Suprman]

I dont believe the hub is vented like the axle is.

 

[Adventure Driven]

The hub does not appear to have a vent

Seth

So how could the hub hold pressure? Does the gear cavity not have a vent on it?

 

[Adventure Driven]

I was hoping, but I relieved the pressure and it built up upon start up, got to have something to do with CTIS

Seth

Could it be the change in altitude between SC low country and AZ mountains?

 

[Suprman]

Disconnect the ctis controller and see if pressure builds up again or not.