On the pig, the gear box is connected via a prop shaft to transfer box at the rear which is mounted in front of the rear diff. It permanently feeds another prop shaft to the front where FWD can be selected.
I am losing oil from the transfer box breather & after a run of more than 5 miles the transfer box feels a lot hotter than the diff, but I don't know if that is normal.
The trouble started last year. The TF/box oil level was going down & was ending up in the diff. No external leakage at all. The TF/box breather was not blocked or damaged it seemed.
During the winter, I removed the TF/box. Although the main seal from the TF/box shaft to the diff looked good, I replaced it.
This year after it had a good run of 35 miles found I was losing oil through TF/box breather. I replaced the breather & in case the diff was pressurising removed the diff breather.
Still got oil leakage. So to get me to Kemble (65 miles) I put a breather pipe 18" long up from the breather hole. No external leakage but oil still getting blown out of the tube.
I drained the TF/box & found pieces of metal. Dismantled the box & found a mangled spacer washer (3.5in od, 3" id). I think I messed up as it was tight on reassembling the shaft.
I had what I believed to be an OK TF/box on another chassis & fitted that. After 5 miles no leaks but after 12 miles, leakage through the breather & diff feeling much hotter than the diff, just as before.
It is not stuck in 4WD. The oil is OEP220 as indicated in Servicing Schedule & stencilled on the side of it. It came from a sealed military drum of recent manufacture.
I was at show recently & saw a Humber GS. I asked if he had leakage problems, apparently not. But I could see the TF/box smothered in old oil & on checking the level found his TF/box was empty.
Question
fv1609
On the pig, the gear box is connected via a prop shaft to transfer box at the rear which is mounted in front of the rear diff. It permanently feeds another prop shaft to the front where FWD can be selected.
I am losing oil from the transfer box breather & after a run of more than 5 miles the transfer box feels a lot hotter than the diff, but I don't know if that is normal.
The trouble started last year. The TF/box oil level was going down & was ending up in the diff. No external leakage at all. The TF/box breather was not blocked or damaged it seemed.
During the winter, I removed the TF/box. Although the main seal from the TF/box shaft to the diff looked good, I replaced it.
This year after it had a good run of 35 miles found I was losing oil through TF/box breather. I replaced the breather & in case the diff was pressurising removed the diff breather.
Still got oil leakage. So to get me to Kemble (65 miles) I put a breather pipe 18" long up from the breather hole. No external leakage but oil still getting blown out of the tube.
I drained the TF/box & found pieces of metal. Dismantled the box & found a mangled spacer washer (3.5in od, 3" id). I think I messed up as it was tight on reassembling the shaft.
I had what I believed to be an OK TF/box on another chassis & fitted that. After 5 miles no leaks but after 12 miles, leakage through the breather & diff feeling much hotter than the diff, just as before.
It is not stuck in 4WD. The oil is OEP220 as indicated in Servicing Schedule & stencilled on the side of it. It came from a sealed military drum of recent manufacture.
I was at show recently & saw a Humber GS. I asked if he had leakage problems, apparently not. But I could see the TF/box smothered in old oil & on checking the level found his TF/box was empty.
So any ideas please?
& why do these things have to happen mid-season
Link to comment
Share on other sites
44 answers to this question
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.