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BigJimny Meet 2019 (17 May 2019)

BigJimny Meet and off-road driving day



20TH OCTOBER 2019

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Noggin and Natter - pre-event chat - Old Bell at Grazeley (part of hotel) 7:30pm 19th October

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Re:Front axle oil leak

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29 May 2019 16:32 #209186 by nick40
Hi Folks,

We have a jimny that my Mrs uses for work. Last year I replaced the swivel seal and the king pin bearings. Recently the four wheel drive stopped working, I’m not in any rush but as it wasn’t clicking I assumed it was a vacuum issue so I planned to replace the vacuum pipes as a starting point. Two days ago there was a pool of oil under the drivers side front wheel which was clearly axle oil, I have just wiped the hubs off both sides but the oil seems to be leaking through the king pins, now when I had the king pins out a year ago I don’t remember any oil coming out of there when I undid them so I am wondering if there is another seal that might be responsible for the oil leak......any ideas?

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29 May 2019 16:39 #209187 by Lambert
Replied by Lambert on topic Re:Front axle oil leak
When you did the king pin bearings did you also replace the axle oil seals where the half shaft enters into the axle tube?

Dreadnaught (black 2011)

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29 May 2019 16:49 #209189 by mlines
Replied by mlines on topic Re:Front axle oil leak
The oil is actually coming out of the kingpins? They should be sealed with sealant and tight to prevent wobble

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2003 M13 early KAP build.
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29 May 2019 18:43 #209191 by Nickfortey
Replied by Nickfortey on topic Re:Front axle oil leak
No I’m pretty sure that’s what the problem is, I think those seals have gone.....any one have a link to replacing these,?

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29 May 2019 18:45 #209192 by Nickfortey
Replied by Nickfortey on topic Re:Front axle oil leak
Yes that’s what shocked me I cleaned the two surfaces up and sealed them with some copper coloured sealant and did the 4 bolts up to the correct torque, but I was surprised that oil was getting that far across the axle, clearly I need to strip it down further and replace a seal further in

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29 May 2019 21:27 #209198 by Scimike
Replied by Scimike on topic Re:Front axle oil leak
Assuming your kingpin bearings are still ok it's going to be the Axle tube half Shaft seal. If they have failed or are damaged oil from the axle will get past and pool in the swivel, eventually finding its way out even past the swivel seal if enough gets trapped.

You have already done the hard bit before, it's take it all apart as per the kingpin bearings, but when the half shaft is removed simply replace the seal. Martin (Big Jimny Store) sells them and his wiki video on "how to change kingpin bearings" shows the misuse of a claw hammer to remove and replace the half shaft seal (his words). Easy job to do once you are in.

Mike

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29 May 2019 21:43 #209200 by Jimx5
Replied by Jimx5 on topic Re:Front axle oil leak
Also make sure you fit the 9mm seal or you will end up doing it again next week.
Jimny store for the 'correct' seals.

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01 Jun 2019 10:32 #209388 by kirkynut
Replied by kirkynut on topic Re:Front axle oil leak
So to be clear, did you replace the axle tube oil seal when you replaced the King Pin bearings?

If not, they were always going to fail at some point and may have been damaged but it's taken a while for enough oil to show as a leak.

Don't mess about with vacuum pipes, you'll spend far too much time chasing the problem. Just buy freewheeling hubs from Jimny Bits.

Kirkynut

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