Steve - welcome to the world of big-rig mechanics. It looks like you're right with it in terms of gear. If Clinton gains the Whitehouse, maybe you can use your new skills to supplement your income to pay new taxes
That has to be one of the CLEANEST axle interiors I've seen !! Props to all the previous owners !!!
So are you saying - If she wins and all the over taxed east coasters move west there will still be no escaping ? Did you hear that Von ?
I guess you'll just have to move west for the wide open spaces.
(And the dry salt free non-corrosive environment in which axle interiors live long and healthy lives.)
After dressing the surface slightly with a flat file to remove pry marks some previous ham fist left on the differential housing and cover surfaces I put a light coat of blue stuff on both surfaces and bolted here back up.
Don't forget the lock wire in these two bolts.
Von suggested putting a little hydraulic oil in air supply screw hole to help lube and swell the seals. I didn't have any "hydraulic oil" but being an old time dirt-biker I had about 20 half empty bottles of fork oil with "seal swell." That should do the trick. I put some in the vent tube near the portal case and a little in the air supply screw hole - barely any went in there.
Great Practice run ;>) Really nice job on pix and dialog. It adds time to your job, but is bound to save time on someone else's. I have a 421 with hydraulic lockers, they don't work and the master cylinder is empty. I haven't tried refilling/bleeding yet, but seeing what you've done here im a little less nervous should I wind up in a worst case.
Ken, I've found that it's mostly the size and weight of stuff when it comes to Mogs (and the larger tools). Once you get past that, they pretty much can be fixed in the bush if you have the right replacement parts.
__________________ " It looks just like a Telefunken U47 ! "
My right front wheel still has a large leak on the inside. After a 2 mile drive the inside of the tire is coated with gear oil. What other seals or gaskets could cause this how difficult are they to access ?
The front locker seem to be working but it was hard to test for sure.
One thing to be aware of.. when the breather gets blocked or restricted the pressure builds up in a hot axle assy and oil is forced out the seals.
Bazzle
Breather tubes on both axles were plugged but are both clean now.
There is a metal breather tube coming from the portal box and another from the axle housing on each side of the front axle. When I got this truck these tubes were open the the atmosphere. It appears as though they should be connected via a short length of rubber hose present.
Is this true, should the axle housing and the portal box breather tubes connect ? If so, where do they vent to atmospheric pressure ?
Breather tubes on both axles were plugged but are both clean now.
There is a metal breather tube coming from the portal box and another from the axle housing on each side of the front axle. When I got this truck these tubes were open the the atmosphere. It appears as though they should be connected via a short length of rubber hose present.
Is this true, should the axle housing and the portal box breather tubes connect ? If so, where do they vent to atmospheric pressure ?
thanks for any help
Steve,
Those tubes should be connected together with a rubber hose. I would disconnect both first to make sure they are both clear. (check the banjo bolt as well) They vent up thru the main vent on the torque tube. My guess is the tube on the portal box is blocked, this is what is causing your leak.
I've read that on the SBU mogs, the water fiording option pressurizes the axle through the vent tube to keep water from getting through the seals. Is this true? If so I wonder if it is a different design of seal, or maybe a certain pressure regulator to compensate for the need to vent the axle?
__________________
Seth
71 416Mog, 92 fj80 (worst fuel pig EVER), new 85 300tdt for dad, 2000 KLR650, 84 300td STOLEN!
Steve,
Those tubes should be connected together with a rubber hose. I would disconnect both first to make sure they are both clear. (check the banjo bolt as well) They vent up thru the main vent on the torque tube. My guess is the tube on the portal box is blocked, this is what is causing your leak.
Thanks all for the suggestions, I will check them out.
I already cleaned both banjo fitting under the spring mounts on each side of the front axle housing. They freely pass air when I blow in them. I think I also blew in the portal axle side breather tube but I will try it again later today just to be sure.
Somewhere on this forum (via a search) I read how both front portal boxes vent to the axle housings which vent to the torque tube which vents to the atmosphere via an open loop up high on the chasis.
Is this correct ?
If all the above vents are clear then what would the problem be ?
I do not have an "exploded view" but I assume their must be another seal on the inboard side of the portal box - is this correct and would this be the culprit ? Is changing that seal a difficult job ?
Linear Mode
