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Old 05-10-2015, 10:31 PM   #941
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Glad you thought about the way these 4 bangers dance around. It took only 4000 miles for one of the brackets on the top-of-the-motor mounted air cleaner to fatigue and break. I've now mounted the air cleaner on small rubber isolators similar to mini engine mounts. We'll see how that goes. Jack
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Old 05-10-2015, 10:32 PM   #942
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We've got one in a 580 Case backhoe that had a bad rubber mount. You'd have thought it was an earthquake!
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Old 05-11-2015, 09:26 AM   #943
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Hey Jack --- how are your motor mounts configured? Are they solid or fluid and what position are they in?

I had to go solid due to space but mounted them on a 45* angle just above the cranks' centerline. I also moved my attachment points from the front of the engine to the mid-point to try and help balance the total load. That new Allison is quite a bit longer than the old AT 545.

Curious to hear how the NPR is set up.
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Old 05-11-2015, 11:18 AM   #944
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Hey Tango, the NPR has 4 mounts. Two, 3" x 3" x 3" solid blocks located just below the crank and at the center of the second piston at 45 degrees and two, 1 1/2" x 1 1/2" x 1 1/2" solid blocks located one on either side of the rear of the tranny at 45 degrees and just above the center line of the output shaft. As an unrelated note, the steel fan shroud is firmly attached to the engine block and then attached to the radiator with a spongy rubber band connector. The radiator itself is mounted on large mushy rubber mounts on either frame rail. I don't see much torquing of the engine and tranny when it loads and unloads, but they sure dance around when unloaded at idle--even more when I shut the engine down. Jack
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Old 05-11-2015, 01:50 PM   #945
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Sounds pretty much like the mounts I have but I have not cranked this beastie since installing it. Still have a lot of plumbing to sort out.

And everything I have read and seen concurs with the shakes, particularly on start-up & shut-down.

The fours are called "paint-shakers" for a reason. The sixes balance out much, much smoother.

Thanks Jack
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Old 05-11-2015, 08:59 PM   #946
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Yup.

Haste makes waste.

Of time and money.

Nat
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Old 05-12-2015, 11:22 AM   #947
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Roger that Nat --- As you no doubt know, a project of this scale can be daunting when it comes to planning out and considering how things go together. If not thought through it is easy to construct something that cannot be serviced in the future without taking the whole bus apart. Your project is a whole lot bigger and more complicated than mine so I'm guessing you spend as much or more time thinking every feature through as you do building it.

I could have been done a year or two ago if all I had to do was build out an interior in a ready to roll chassis. But...I made the mistake of falling in love with the looks of an old rig that needed just about everything rebuilt or brought up to current driving needs. No complaints though. One thing we have in common is a desire to construct a unit to our own needs and standards. And that "path less taken" calls for an extra measure of care and patience.

I'm over three years into this project and still have at least another two or more to go given the time I have available to work on it, but since this is going to be my mobile retirement home...like you, I want to try and do it right.

Onward!
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Old 05-14-2015, 11:23 PM   #948
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Rant Warning!!!


Finally found a critical component I have been trying to track down for months. Since my entire driveline is all home brewed, locating various parts can often be tricky. This discourse may or may not be helpful to anyone one else, but if you are running a 1000 or 2000 series Allison tranny, it could apply.

The Issue: Adding a Parking Brake

There are basically two types...hydraulic & mechanical. For medium to heavy duty vehicles the mechanical is preferred and is mandated in many instances so that's where my search began. There are three types of mechanical park brakes these days...

1. Wheel Mounted - Mounts on one or both rear wheels. Depending on the axle it may involve Drums or Disks. If Drum, it will usually be a cable pull system that is already built in. No big deal. If it's a disk system, you will likely have to add one or two additional calipers on the rotors that are mechanical and cable actuated. Mounting hardware can be a beotch.

2. Axle Mounted - There are now axle mounted, mechanical disk systems that mount at the rear driveshaft yoke. Most require a custom made mounting bracket but some are available for the more common axles. It is a relatively simple system but the bracket itself can once again be a bit tricky.

3. Transmission mounted mechanical driveline drum brake - These have been around forever (My original 1946 4-speed tranny came equipped with one. It just wouldn't bolt onto my Allison). These are simple, capable of holding a hefty load on steep inclines and can also serve as an Emergency Brake.

My preferred option was for Number Three.

OK...so where to get one? That's where the drama and research time came in. There are only two manufacturers in the US and I called and emailed them both. Neither could tell me what make/model/year of vehicle their own products were used on. Thanks for nothing guys. I talked to Ford, Chevy and International dealers. Once again, no help at all. Without a VIN number, most dealers have no idea what was used anywhere. Only after lots of online hunting and finally resoting to using friggin Wikipedia was I able to determine that there were at least a couple of Chevy trucks that used the system I was looking for. Turns out, the Allisons with the driveline park brake were found on Chevy 4500 & 5500 medium duty Kodiaks in at least '08 & '09.

From there I started calling Chevy dealers. Here we go again. Without a specific vehicle VIN number they can't find their asses with either hand. You'd think that with all the new computer systems, you could look up any part on the planet. And, maybe you can, but most of the morons working the counters these days are simply too stupid or lazy to make it happen.

About to give up and go with a boat anchor, I finally came across one Chevy parts guy (Randy @ Lone Star Chevrolet) with enough savvy and initiative to cross reference the parts. BINGO! Since the complete unit is not available, he put together a list of every component and ran it all out. Not cheap, but at least I finally had everything I needed on paper. I drove out and handed off cash and my compliments with a smile. Not cheap, but I now have ordered what I need to start wrapping up my driveline.

This whole tirade is less about a few mechanical parts than it is mindset. What the frick has happened to the auto parts business? As a kid, I could count on some old codger who ran a crappy junkyard to know virtually every part on every car ever made and which ones would cross over to something else. All from memory and experience. And now that we have the computing power to take Pi out to a billion places or calculate the orbit of stars in another galaxy...the idiots at dealerships can't even use them to find a set of lugnuts when you have the freakin year/make & model!

No wonder China is kicking our ass!

There...I feel so much better now...and thank you all for listening.
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Old 05-14-2015, 11:37 PM   #949
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Hey I live in California, try finding someone who know what rodding out a radiator means, 99% of radiator shops only know how to remove the old & install new
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Old 05-15-2015, 04:54 AM   #950
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Quote:
Originally Posted by Tango View Post
Rant Warning!!!
This whole tirade is less about a few mechanical parts than it is mindset. What the frick has happened to the auto parts business? As a kid, I could count on some old codger who ran a crappy junkyard to know virtually every part on every car ever made and which ones would cross over to something else. All from memory and experience. And now that we have the computing power to take Pi out to a billion places or calculate the orbit of stars in another galaxy...the idiots at dealerships can't even use them to find a set of lugnuts when you have the freakin year/make & model!
Because the industry is too reliant on technology, IMHO. My late father spent most of his life turning a wrench- be it for my grandfather's gas station (and Volvo dealership later), the local Chevy and BMW places, or on his own- pretty much would rant and rave about how the newer mechanics couldn't seem to diagnose the simplest thing without the aid of a computer.

Even I ran into that with getting front license plate clips for my daily driver, an 02 Grand Prix. The young knucklehead behind the counter of my local GM dealer sold me a mounting plate for an earlier Grand Prix. Went home, tried to put it on, and said WTF!. Went back, explained what I needed, was asked to bring the car in to the bay and in five minutes the old coot who was the manager had refunded the money for the plate and handed me four new clips.

I also think part of the problem is the employer/worker dynamic changed (probably around 30-35 years ago). Most people don't have the same loyalty to their employer they did, when they knew they could work 20-30 years for a company, advance up the food chain, and retire with a decent pension. Now its just a springboard for another job. Now, if you excuse me, I'm going to get off my soapbox, stop , and go have more coffee.
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