Please help! New 2h alternator sprayed oil in cab through booster!

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

NOSAJ

NOSAJ

10 Year 15 Year
Joined
Dec 13, 2007
Threads
86
Messages
1,044
Location
Franklin, TN
A little back story… I have a 1980 HJ45. Last year I replaced the h engine with a 2h. I was running the H alternator on the 2h. Power brakes Worked and alternator worked fine for awhile then stopped charging. I haven’t driven the truck in about 6 months. So Today I replaced the alternator with a brand new 2H alternator I had sitting on the shelf for about a year. I got everything hooked up and was charging good. I’m pretty sure that I hooked all the oil lines up correctly because there’s only 1 way it goes the small oil line and large oil line then the vacuum hose. I started up and went for a quick drive. I had no power brakes the whole time. Then got about 5 miles down the road and started hearing a hissing sound and figured out it was coming from the brakes. When I stepped on the brakes it would stop. It kept happening and I turned on a light and my pants and boots and floorboard was covered in oil. Oil was coming through the booster I guess and down the brake pedal. So turned off the truck and towed it home. Anything that you all can think I did wrong? Any ideas? Thanks for any help.

Jason
 
After I did a little googling research. It seems that some seal inside the pump portion might be bad. Probably ruined my booster. Let me know if anyone else has ideas. Thanks
 
You may have the connections wrong..

1771309843595.webp


1771309865877.webp
 
Well I feel like an idiot… that was my problem. Switched the oil return and vacuum. The confusion was that my h had banjo fittings for the oil lines and this alternator doesn’t have a stub like pictured above for a vacuum line to slide onto. Hopefully I didn’t ruin anything and I can clean up booster and everything and it might work.
 
NOSAJ said:
Well I feel like an idiot… that was my problem. Switched the oil return and vacuum. The confusion was that my h had banjo fittings for the oil lines and this alternator doesn’t have a stub like pictured above for a vacuum line to slide onto. Hopefully I didn’t ruin anything and I can clean up booster and everything and it might work.
Click to expand...
Rubber does not like oil, so I would be rinsing that booster out with something like brake cleaner or panel wipe to get it out.
 
NOSAJ said:
Well I feel like an idiot…
Click to expand...

Common mistake. I’ve done it too! Onto the next task on your bus, boldly! There's more learning to be had!
 
Thanks @duncanrm yes a lot of learning still to do!

i took the booster off and set it so oil would drain out the vacuum port overnight. I was thinking I would separate the booster and take it apart and really clean everything but really having a hard time getting the internal locking ring to budge. I sprayed the locking ring with some penetrate so maybe it will work. Only other option I see is to spray brake cleaner up in there and swish it around and rinse and drain. My concern is maybe the brake cleaner might eat through some of the rubber parts or damage something? But then also getting an old booster back together without damaging it. So thinking rinse with brake cleaner and let it ride and see what happens. Let me know if anyone has any ideas. Thanks
 
Bremsenreiniger kann Gummi beschädigen, insbesondere bei längerem Kontakt. Spülmittel löst Fett und Öl. Reinigungsbenzin ist ebenfalls besser geeignet als Bremsenreiniger.
 
Brake boosters are reasonably cheap in the scheme of things.. do what you can - replace at some point if there's any lingering concerns.
 
You must log in or register to reply here.

Share this page

Back
Top Bottom