Mackpro

On the Etech style engines they do make a high volume oil pump that helps. On the older E-7's I dont know. I think the oil pump on the Etech style engines turns backwards compaired to the older E-7's. I know the auxilary shaft turns different because the P/S pumps that bolt on the front timing cover wont interechange, found out the hard way!

Yea dont worry till it goes below 10 PSI at hot idle, its common.

http://www.bigmacktrucks.com/index.php?showtopic=11429&st=0&p=43360&hl=granite&fromsearch=1entry43360 Check out this thread. Copy and paste.

Sorry for the delay, Your truck needs the step 12 B software updates, look for some past threads about low power on Granites and it will explain it all. Also get the valves adjusted and have the rocker arm hold down bolts replaced ( very important!!!!!!!). A check of fuel supply pressure would be good also. A good pressure testing of the aftercooler and intake system would be next, then a test drive with a manual pressure guage hooked up to check actual boost pressure and see if it's in spec. Tire size, gears and trans (your build record says it has a mack T310M trans)all seem they should work together well. Your 400 HP might be alittle weak as most but not all guys here run 427 or 460's. We have some 400 HP CV's around here and there not really being blow away by the 427 & 460's. It could be bumped to a 427 with a download and turbo and injectors. I do alot of HP coversions at our dealership. For some year models the EPA wont Mack turn the existing AI engines up past 427. 460 would be nice. Who ever does your peograming need to check and make sure the tire size and gear ratio are all enter correctly in the ECM's and all other parameters are set wide open. Also make sure your engine fan is not locked in all the time and it will pull 30-50 HP.

Is your over flow jug ( the jug with the plsatic cap, not metal radiator cap) mounted on the passenger side frame rail by the radiator or is it on the driver side fire wall?

When I first heard of this truck I was told it was a lightweight Granite with a small cummins engine. I was also told it would have a real short hood (possibly a Volvo hood) and would kinda look like the Ford L9000 that Coke and Pepsi used to pull their bottle trailers in the 90's. I was told it would only be sold to city governments and certain customers due to avoid having people overloading (large dumpbeds and such) them then complaining of low power (not enough enine) and other overload failures. Mack had this problem when they made some lightweight RD's years ago with an E5 engine (midliner engine?) then people tried to turn them into tri-axle quarry trucks. Also the salesmen at the dealerships were mad that you cant get it in single axle! Whats the use in being lightweight if you cant order it as a single axle? On the one piece windshield I heard it was only for the CXU and CHU and now the new medium duty Granite. I heard they stopped offering it in the GU (Granite) due to cab flex cracking the 1 piece windshield during off road and severe duty use.

Hopefully its just the sending unit. Sometimes times its the wiring but not often. The wires go from the sending unit in the tank to the cab ECM. If something is wrong with the dash guage or dash cluster it wont set a code so its probably just the sending unit.

Fuel tank sending unit is a 6-1 code.

Somebody got their ride "PIMPED"!

That VIN doesn't show up for any Mack ever built. On ever CV I have ever seen the last 6 of the vin starts with a 0. Does the dash have a manifold pressure ( turbo boost)guage in the upper left hand side of the dash? If so what does it read under a load? Spec is 28 to 36 psi. My friend has a CV713 with a 427, 4.42 gears, 11r24.5 tires and an 8LL trans and it runs great. With your gear ratio it should be good. Recheck the vin and see if its correct.

Out of our 3 stores we have only sold 1 and I never got to see it. We only sold 2 new trucks all of last year. We are having a much better year this year but no Titans planned to order.

Whats the last 6 of the VIN #, I can see if the Step 12B update has been done in the ECM. Like the post above, need more info, tire size would help.

When the Freedoms were first coming out I ordered 3 different service manuals for them. We never sold one , saw one or had one on the lot. The manuals I have are for the wiring, engine overhaul and AC/heating system. I looked for any fault code info but found none in the manuals I have.

Just have your Mack dealer pull up a CXN613 that has a Horton fan drive/clutch and order what you need. You will need the fan clutch/hub, fan blade and air solinoid. The dealer will have to change the fan setting in the engine ecm to on/off. Also your fan belts will probably have to be replaced with longer or shorter ones. We have done a few but most people stick with the Behr even though they last only about 3 years max. Good thing about the behr is they dont come off and go through your radiator like the hortons do!

Heres some pics, pulled a new one off the shelf, Let me know if you need the other side (engine harness wire #'s).

I was thinking EGR valve sticking open or most likley VGT/ turbo actuator. Really need to get a fault code out of it. Both of these parts are $1000 each so I wouldn't want to start throwing parts at it. Till you know for sure.

I'm sure you can on the 92 series cause we have changed the upper pinion and ring gear/bevel gear with the carrier still in the truck/housing. I thought you could on the 93 as well. I know on the 200 series you have to pull the whole carrier out. All my books are at work though, to double check.

We have a winner!

Had a new CXU stop in and it had the first M-drive transmission that we had seen. Driver said it was super smooth shifting and really liked it. We got 2 techs at M-drive Mack school this week. Hope these transmissions are trouble free! Sorry pics are sideways!

Mack had a service bulletin about Biodiesel, I think they only recomend 10 or 15% max, I'll try to find it and post it. Some guys in our area with new DPF equipped trucks used the 20+% biodiesel and it caused lots of regen problems. If it was a farm truck or a truck that wasnt used much I would not put any bio-diesel in it at all. I would only use it if I knew I was gonna run it all out before it sit to long.

When you turn the key on, does the red X shutdown light and the yellow "lightening bolt" light come on for 2 seconds then go out? If not the engine ECM might not be powering up. If the J-1939 line and the other datalink (cant remember the #, J-1758 ?) wire are unplugged it wont start. Some where I have a "crank but no start" troubleshooting check list.

Whats the last 6 of the VIN and model number (GU713- CXU613...ect) I can pull it up and see what AC set-up you got.

You can have your Mack dealer bump your 350 to a 400 with just a download/HP conversion. The only hard parts to install would be the larger vibration damper if needed. We do lots of the 350 to 400 conversions. The cost of the download used to be free but here latley Mack (Volvo) has been charging the dealer $300-500 plus Dealer labor time and vibration damper if needed. To get to the 427-460HP range you need turbo and injector change plus pull the cam and install off set key-way to retard the timing to prevent overheating ( must been done in the RD due to small radiator, we have tried before without key-way change, big mistake) I was thinking the last ones we did totalled a little under $6000 all parts and labor. You could get some larger aftermarket injectors to bump it up alittle. www.rochesterfuel.com used to list some stage 2 and 3 injectors for ETECH's but I see they are gone from their website.