My '89 9670 build


For you lovers of the Class 8's and bigger.

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Golden Jubilee
Golden Jubilee

Posts: 1612

Joined: Thu Nov 29, 2012 10:40 am

Location: Wichita, Kansas

Post Sun Sep 02, 2018 3:52 pm

Re: My '89 9670 build

I'm glad you got it back on the road! Thanks for allowing us to follow along.

Dean
Lifelong Kansan
Grew up with red paint
Moved off the farm 26 years ago.

Golden Jubilee
Golden Jubilee

Posts: 3491

Joined: Thu Nov 29, 2012 9:28 pm

Location: Lyman, IA

Post Sun Sep 02, 2018 6:34 pm

Re: My '89 9670 build

It wasn't a smooth come back. After running it around the area bobtail and with an empty trailer for400 miles, the fuel pump locked up with in a mile of putting the 1st load on it. That cost me more than twice what I paid for the engine!
Still shaking the bugs out of it. Any new (used) truck I buy takes me 3-4 years to bring it up to snuff, and work out all the problems the last owner ignored.
This one wasn't new to me, but working it hard as a heavy hauler than letting it sit for more than 10 year have taken their toll.
I still need to replace the cab jack, add an Espar heater and hooking up a fuel heater, before the cold weather sets in.
It looks like the other guys insurance is going to fix my little cabover, once it is back in good shape, I will likely sell it to pay for the work needed on the Marmon. I'll be sad to see it go, but I don't really need 3 running trucks1 It is the least comfortable of my trucks, having the smallest sleeper and 4 spring suspension.
It would make a good truck for a farmer, simple and reliable and lightweight.

Golden Jubilee
Golden Jubilee

Posts: 3491

Joined: Thu Nov 29, 2012 9:28 pm

Location: Lyman, IA

Post Sun Sep 23, 2018 11:02 am

Re: My '89 9670 build

Air bags! or how they have changed, I can't say progressed! The original air bag on the corporate IHC air ride was made by Firestone. It had an aluminum base (piston) and a replaceable bag and top plate assembly. I haven't seen the replacements ever, but have the part number for it. The next generation have a steel base and non-replaceable bag, the latest have fiberglass or plastic piston and are non replaceable also.
I have two of the original 1984 vintage bags, one was damaged when a shock came apart and cut the outer layer of fabric and rubber but still held air and worked, I just felt it wasn't worth a failure on the road, so replaced. The two on the back were replaced when the frame was stretched and the people doing the work cut them off!
It still have one original bag that is now over 30 years old! all the new ones fail in a few years, either from rust (steel piston) or from air leaks (fiber piston) when the rust between the mounting studs and base cause cracks in the fiber.
Price hasn't come down either. They are more expensive today then they were in 1984. They used to be quality made in North America and now come from Central-South America or over seas, and last only a few years.
Next rant:
It started leaking coolant from one of the side plates on an 885 Cummins that cover the coolant passage in the block. Put a wrench on one of the bolts and the head snapped off. 2 days of hard work to repair some idiots install of the plate. The plate has a nice thick die cut gasket and a smooth machined surface on both the block and plate, in other words a no brainer seal. But the last idiot was so un sure of his skills slathered both side of the gasket with RTV, which of course found its way into the blind bolt holes in the block. When the 1/4" bolts were installed, there was no place for the excess RTV to go except up the bolt threads, preventing proper clamping force and once set up locking the bolt tighter than locktite!
No combination of easy-outs, left handed drill bits or anything else would release the bolt stubs, which required drilling and re tapping of the threads, and in a location that wasn't the easiest to get to and drill square on center. Can't fix stupid!
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