m5040
-
Posts
52 -
Joined
-
Last visited
Content Type
Profiles
Forums
Gallery
Events
Blogs
BMT Wiki
Collections
Store
Everything posted by m5040
-
I spoke to a long time Mack mechanic, he was framilure with the EZT. He said it was made in Canada and is a higher compression engine that was noted for its fuel economy. He said nozzles are very hard to get. So if you have one, keep the water out of your fuel !
-
Does anyone know the specs on a power steering pump for flow rate and psi? It is on a 1979 237. (Looks like a Vickors)
-
I opened the steel fender and got a better look, you are right it is ETZ675. The truck was a plow truck for the state of NY. It has the steel noze, double frame, live hyd, 10' body, 23k rear 4/1 ratio, heavy front axle (I don't know how to tell the weight on the front axles), the VIN starts with the RD685P. The engine has a small turbocharger and no aftercooling, ABosch inj pump. I am thinking about installing a Jake and a lower rear axle ratio.
-
Thanks, It is difficult to see with the steel fender down. I though there might be more to it.
-
I have a 1979 RD single axle, the engine model is stamped E J Z675. The Mack book I have list the "E" stands for Mack turbocharged diesel engine, the next letter should be an "M" for maxidyne (the truck has a 2 stick 6 speed). What does the J Z mean ? It is also stamped 672 CID, 235HP at 2100 rpm
-
If it has the air to air cooler, check for a broken hose clamp or ruptrued hose (on the hoses from the trubo to the cooler and cooler to intake manifold. A damaged hose might just look like a small slit in the hose that will leak out the boost psi. Won't hear a leak at idle. I have seen trucks come out of the local garage and miss this,,,, I can't beleive it either. If the diagnostic equipment doesn't show a problem, it must be in your head.
-
I am in the market for a single axle dump again. I have found a couple of trucks, one has the 300 with 2 valve and the other a 4 valve. Other then the years built and I would guess better parts availability for the 4 valve, is there any plus or minus features with each? Durability issues. Both have engine brakes.
-
As far as I know, the CDL laws are mandated by federal law and are the same state to state. It should list your limitations on the back of your license. But it goes by the GVWR of the vehicle and what the vehicle was designed for, ie commercial vehicle. So if the GVWR (gross veh weight rating) is above 26,000 lbs, you need a class B CDL and if you add a trailer with a GVWR over 10,000 lbs, you then need a CDL A. Vehicles manufactured as motorhomes/campers got exempted from this cause of a strong lobby effort.
-
All things being relative, my GVW is 36 to 40,000
-
Thanks for the info. The hood of the truck had "Econodyne" emblems under Mack. The governor housing has a sticker listing econdyne. And there is a steel line that runs from the gov housing back to the shift tower. Seems like at least when it was new, it might have reduced the engine RPM in 5th gear to save on fuel, as peak fuel economy is at 1450rpms. That might be disconnected, cuse I feel no difference in any gear, just goes like heck. The only reason I have to shift is to control the road speed. It is my 1st Mack and I am totally impressed and don't want to buy a 237 if there is a BIG power difference.
-
I have a single axle dump with a 300/5speed and realy want a 6sp. Not sure if I want to buy a 6speed and convert the truck or look for another single axle that already has a 6 speed. My question is, I see a lot of ads for trucks with the 237 engine and wonder how it compares to my 300, which I am sure goes without saying is extremely powerful in this application! How would I expect a 237 powered tuck to compare pulling hills etc? My tuck has a 4/1 rear axle ratio, and around town (keeping the econodyne to the 1500-1600 rpm range have) I have squeezed 10 mpg out of it, which dropes to 7.5 on the highway
-
My cab has rust around the windows, gutters, and doors. How hard is it to swap cabs? Looks pretty easy. Do you open the windows and run a strap accross the roof ? Can anyone give me an idea what an air ride cab is worth in the US ?
-
U Model Mack ?
m5040 replied to kansasdog's topic in Antique and Classic Mack Trucks General Discussion
What was the truck with the 29k rear end originaly, a dump ? -
I dont kown much about that model, sounds like a Renault. But you won't need a CDL unless the gross vehicle weight rating of the truck listed on the completed vehicle tag is above 26,000 lbs, (if you tow a trailer that is over 10,000 lbs, this will change)
-
-
Mine 2 080002.jpg
m5040 posted a gallery image in BMT Member's Gallery - Click here to view our member's albums!
From the album: 83 Mack 2x dump
-
So then the 1983 vintage EM6-300 should be safe regarding this issue and the Jacobs brake ?
-
If you see these break all the time with a Jake, is there anyway to check to see if the problem is about to happen without disassembling much ? I have a EM6-300 with a Jake.
-
How To Adj Air Ride Cab Suspension Height ?
m5040 replied to m5040's topic in Exterior, Cab, Accessories and Detailing
Yes, I am messing around with it and should be able to do it with not too much problem. I just didn't want to reinvent the wheel so to speak and was wondering if there was an easy way that I overlooked. You are right about the air leak, it is from a bag, the budjet comes into play and the leak is very minor (1/2 hour before leaks down) Thanks -
My R686ST has an air ride cab that would rise up after you built up air by about 1/2 in. Didn't look like enough. It had a newly installed valve so ? I made a new/longer (1/2") linkage rod that seemed to work perfect, I had the bottom of the cab level (and it would rise up about 1.5"). However, when the air leaked out, the 90 deg linkage now rotated into the cab shock, putting a dent in the outter shield, DOOOUBT !. Does anyone have the proper instruction procedure for adjusting this ? Does the plastic arm come off and respline ?
-
My R686ST was converted to a single axle dump, the numbers on the right rear axle tube (as best as I can make out) are FA49343P13 D23C. It has 6 whole/stud axle flanges. Can anyone shed light on its weight capacity? And what years it might have been made? It has stamped brake shoe tables if that matters. Thanks in advance for helping
-
Brake Problems
m5040 replied to glenn_reid's topic in Antique and Classic Mack Trucks General Discussion
Another sign of this problem is the brake lights stay on. -
Thanks, I will do that
-
My water pump is leaking severly from the weep whole. Where is the best place to get a water pump? Anyone rebuild their old one ?
-
The owner says it is a R690T vin 9T6546, but he may have reversed the number, it is a early R (1967), his helper describes the trans as single countershaft, 10 speed 2 stick. It is a much nicer looking truck then the U model. In your opinion, is the drive line in the U686 superior enough to make that the better truck ? All things being similar (30 years of who knows). It sounds like the 10speed has a creeper, which is nice off road.
BMT Forum Logo
