Jump to content

BC Mack

Pedigreed Bulldog
  • Content count

  • Joined

  • Last visited

  • Days Won


BC Mack last won the day on February 7 2017

BC Mack had the most liked content!

Community Reputation

785 Excellent

1 Follower

About BC Mack

  • Rank
    BMT Forum Guru

Profile Information

  • Gender
  • Location
    Vancouver BC

Previous Fields

  • Other Trucks
    1956 GM PD4501 Scenicruiser Coach

Recent Profile Visitors

3,228 profile views
  1. BC Mack

    allison trans cooler

    you won't get too many guys on here experienced on Allison trans, as said it is mostly a dealer thing.... I've worked on the B400/500 but in a bus application, not too different to what you have... we have laptops and trans dyno to use so I am not going to point out any bush repairs as failure is costly with an Allison... and they don't work for too long with antifreeze in the clutchplates so hope you got there early and nothing leaked back into the trans. buses have a remote cooler because the retarder mounts at the rear but similar in application to what you have, an oil core inside a coolant can..!!!! I assume yours is an oblong unit under the output flange??. it is probably the source of your problem, but we don't see too many of that fault just blocked up with debris or cracks causing coolant drips...we remove them on a semi-regular basis for reverse flushing and pressure testing if the oil core has a leak we scrap the whole unit, we just fix the can. pressure inside the trans is up to 300psi so we use Transynd not ATF literature would be generic and there are manuals on ebay and how to videos on youtube (try 'Allison 4000') you have to be an approved Allison shop to get the on-line manual and they are VERY specific to serial number, especially for parts pages, I made my own up for all our variants but never printed the cooler section, or pto..!!. we pressurise the coolant side to 100psi immersed in a water tank, the reverse flush is done on a machine with a air/hyd pump and pushes about 150psi through them....not sure how you would hook up the hydraulic side on your unit if you get totally stuck I get back to my old shop occasionally, books are there, but I think you need info quicker hope this helped BC Mack
  2. took a pill, washed down with a bottle of Efes pilsner just to get in the mood.... unfortunately youtube has removed "destination doha" due to copyright issues but that was the definitive cult movie for the "gold run".... BC Mack
  3. BC Mack

    Fifty shades or tarmac

  4. BC Mack

    The new MP8HE engine...

    what's old is new again..... power recovery turbines were used by Curtiss Wright on their radial aircraft engine the R-3350... used primarily on the Douglas DC-7 and Lockheed Super Constellation airliners, three PRT's used exhaust flow to transfer power to the crankshaft raising power from about 2800hp up to 3500hp.... recent adaptations in air racing with nitrous has seen 4500hp... and no EGR valve...!!! BC Mack
  5. BC Mack

    Transmissio swap from T2090 to T2070

    Vlad my other secret is to make a 4 wheel trolley and roll the trans back on it until it bumps into a crossmember, then lift it with a small engine crane, remove the blocking, slide it back some more... easy with a cabover, even easier with a forklift... but it was better to drop it than lift it out, less stuff to move out of the way, you just have to lift the engine enough to have the rear mounts clear then block the trans on the trolley... my 2 cents, worked for me given the environment I had to work in... didn't need to fully remove the trans, just had a disk stuck to the centre plate.. I also removed my bus engine by blocking up the engine and towing the bus forward..!!! there's always another way to do stuff... BC Mack
  6. BC Mack

    Transmissio swap from T2090 to T2070

    Vlad pics of installing clutch with 18 speed, another trick is to make two guide studs for top as it helps with alignment BC Mack
  7. BC Mack

    Air compressor

    http://www.bendix.com/en/servicessupport/documentlibrary/doclib_1.jsp search for ..... d-2 open SD-01-503 16psi per full turn clockwise to lower... but I would do it in stages useful website for all Bendix info HTH BC Mack
  8. BC Mack

    Mack Cab Over help

    that's the lower damper support.... on the V8 it is attached to a bracket on top of the compressor, yours looks like a Cummins?... I'd flip it over 180 and go looking for a couple of spare holes around the valve covers.. the damper goes sideways to the long linkage so it looks in position right now on Farmer52's photo the damper is not installed, you can see the empty elongated slot below the mount BC Mack
  9. BC Mack

    orange foam in coolant

    trans pressure (I surmise Allison) is much higher than shop air... if that is what you were using for test.. take a coolant sample and get it tested agreed that nat gas engine oil stays light brown but so does trans atf or transynd BC Mack
  10. BC Mack

    Ontario to start driving on the left

    The funny thing is..... Canada used to drive on the left, it followed British colonial rules, switched over to the right on Jan 1st 1922 http://www.vancouversun.com/life/week+history+switching+from+left+right+thing/11625241/story.html can you imagine the lane switching at the border crossings today if we hadn't changed..!!! BC Mack
  11. deja-vu all over again...25+ years later... PB 372 BC Mack
  12. BC Mack

    Work boots

    I'm about to retire and since I will utilise a company boot allowance for the last time I figured I'd go all out to treat myself and buy a pair of Daytons... beats the China made Kodiaks and Walmart rubbish and since they won't be used in a hostile environment these will last forever... who the heck are Dayton? I hear you say.... been making boots since the 40's here in a small shop in Vancouver BC but sell worldwide, so stuck in their old ways of handmade logging and cycle boots that they still measure them in the same British footwear sizing number system they had back in those colonial days. Expensive, holy crap expensive, but they are made to order and custom fitted if required, and there are still stories around town from the 70's that you were barred from the bars and clubs if you were wearing a pair such was the association to bikers and fighting loggers. I got the lowest price steel toecap boot at $399cdn but the movie stars working in "Hollywood North" are reported to be good customers for the high end boots... it's now fashionable to look 'rough' I presume.... BC Mack https://www.daytonboots.com/ https://www.daytonboots.com/collections/csa-workboots/products/6-inch-64-csa-workboot
  13. Not only piston engines..... jets like water methanol too...!!!! BC Mack
  14. Well, the Germans are now manufacturing new FW190 WW2 fighters as a continuation of serial numbers at absurd prices... so why not rare automobiles by the oem or official licencees... new E-type shells have been repopped for many years, so manufacturing should not be an issue and the D was discussed in the auto media about 10 years ago as a possibility... however, if I was the owner of a priceless original D and somebody dumped another 25 on the market what would mine be worth now??? so, does it get a VIN plate or a serial number.. hmmm... how original do you want it, Lucas electrics..!!!! lucky LeMans is only 24hrs as that is all the warranty Lucas was good for..!!! BC Mack
  15. KSC... the FAA doesn't oversee military aircraft..!! military maintenance is different from civil and rarely accepted by the FAA if demobbed, though I'm sure in the 747 it would be close.... Approvals for civil aircraft would be under the aircraft manufacturer to ensure compliance when installed in a new airframe or an approved repair station and component manufacturer PMA holder to comply for installation through an STC by a DAR.... the airframe manufacturer would be involved if their approved design was altered significantly, the FAA is just there to ensure compliance to paperwork through audit, very rarely through an actual inspection, that responsibility has been unloaded over the years to the manufacturer, repairer or installer under their licences and self audit. nearly ran out aviation acronyms there..!! BC Mack

Welcome to BMT!

...The world's best antique, classic & modern Mack Truck support forum! Founded in 2000, BigMackTrucks.com is the place to go for everything related to Mack Trucks!


BigMackTrucks.com is owned and operated by Watt's Truck Center, New Alexandria, PA. This forum and it's contents are not affiliated with Mack Trucks, Inc. or Volvo Trucks North America.