Jeremy_Brault

Grab the wire harness by the air compressor and wiggle and try it. They break where it turns and goes behind the engine.   

I have a 2013 chu with an mp8 505, I was wondering has anyone ever taken an m-drive transmission out and installed an 18 speed Mack transmission?   How big of a job is it?   I have all 18 speeds in my fleet besides this truck, and we absolutely do not like it.   We spread gravel on township roads and do a ton of short hauling.  It just doesn’t work as nice as the 18 speeds.

Can anyone tell me what the purpose of the ground relay is on the firewall of a Mack truck?   Do I need it or can I bypass

Looking for ground circuit wiring diagrams for a 93 rd Mack.  Thank you

No codes, well there is but it’s me unhooking and trying things

I have a 93 rd with an e7 400.   We overhauled the engine last winter.   It acts like it doesn’t have any power now.   So I had the injectors tested while I did the head retorque,  they are perfect.   I’ve acquired a pro link 9000 scan tool for a Mack and have narrowed it down to the timing is not advancing, it actually retards when accelerating.  I have 12 volts at the econovance solenoid. I powered the solenoid with 12 volts and it runs better and shows timing advance on the scan tool.   I tried changing Ecm and Bosch module no luck.  I’ve also changed temp senders and manifold air temp sender, and Reset tem sensor,  but nothing changes still no advance after idle.   So my question what’s telling it to not advance? 

I’m looking for the cab wiring diagrams for a 04 ch613.   I’m trying to locate where the customer ignition feed comes out and where the customer battery feed comes out.   I have power leaving both switches, but can’t find where they are at.   I thought on my 07 ch they came to the junction block on the firewall, but not in this. 04. So I need to do some tracing.   Thanks in advance 

Jeremy

Well I found that the sleeves were leaking on cylinders 2&5 so I ordered a new long block

The leak is not external, that's the funny part it's internal runny out crankcase breather. I did not sample but tasted it and its antifreeze 

I have no white funky slime like water oil mix makes,  I also have deleted the egr and egr coolers

The 12 speed is an all around awesome tranny,  down fall is extremely expensive to overhaul I have one in an r model with 4.17 gears and tall 24.5 rubber cruises about 75 at 2000 according to gauges

About $500 for rods and mains.  210ft lbs on mains buttress bolts are 95ft lbs rods are 30ft Lbs plus 90 degrees. Oil pump bolts are 40ft lbs

I have an 04 ac460p. That is using antifreeze.  The other day I was trying to find the source and found that the antifreeze is running out the engine breather hose. I had the oil pan off few days ago to roll bearings in it and had no traces of Antifreeze there. And nothing inside valve covers, so my question is what is causing it to run out the breather?  It uses about 1/2 a gallon a10hour day

2004 and older I believe

Hi,

I'm looking for someone with a truck with an e7 460p etech engine in it, im looking for the vin. number to order some 460p parts.  thanks in advance

Jeremy

Shift mine all the time doesn't seem to bother

Wiggle the wiring harness around back of engine, by air compressor. They break their.

I have a 93 RD with an E-7 400. It started to intermintately pushes the antifreeze out of the radiator. Then it will run for a month and do it again. Now it wont quit. I also noticed that during this time it had seemed to have alot of pressure in the radiator, even if it sat for a week still had excess pressure. So we installed a new waterpump and water pump housing (local dealers idea) but did not work. Then we removed the drive coupler from the compressor and tied the antifreeze lines together so we eliminated the compressor. Still no cure. So next we pulled the heads, and the head gasket was blown out in the left rear corner of #6, but not to a water jacket. It has oil shmoots on the firewall, Is that my problem? if so why did it blow out there? We also noticed that the heads are cracked in three places all the same, from like the exhaust valve seat towards the center. Is that common, or the problem? Any help would be great thanks

I'm looking to buy the tool to set pump timing on a 94 e7. Any help would be awesome.

as i have been told the air lockers still have the peanuts and are still automatic just that you can lock it in before you get slippage. that way you know it is locked up and cant let it go. maybe im wrong correct me if i am but my old mack mechanic told me that.

no cuz it does it when you hold it at that rpm and pull it hard, but if you floor it it will quit doing it once it hits 1300 rpms.

Got an 07 chn with a 460/ 480 horse. When you pull it hard at like 1200 rpms it spits and like shakes the whole truck. Sounds like the egr doing it, but dont know the cause. Any ideas? thanks

Any one know of any way to remove the egr stuff on an 07 accet engine?

where did it come from? looks like one outta the fleet mine came from in canada.

look for a 2130 they are the same and cheaper you just need to cut off the lock knob on the splitter lever in the shifter knob so you can split it in the low side