dragonslayerpa1

Hello All you dog owners I am in need of a heater cover for the inside of a 1985 R model mack truck, with a/c i was told this part is no longer available, been looking but havent found any on my own so i am here looking for some help any one that knows where i can get one please email me at dragonslayerpa1@yahoo.com

Thanks

Gary

looking for a heater cover from a 1985 mack r model with a/c cant find none anywhere if you have one please email me at dragonslayerpa1@yahoo.com thanks Gary

I am going to install a bearing kit in my back rear 44000 rear i was woundering how to set up the pre load and the back lash,,, can any one offer any advice on this matter..

HI Guys i have a 1985 rd 686 triaxle and ive got a vibration and rumble noise in the back rear,, the yolk was lose and the u joint was bad,, replaced the joint and tightned up the yolk but the noise is still there, was looking for a diagrahm of the rear so that i can replace the pinoin bearings also maybe someone can tell me where would be a good place to buy a rebuild kit for that rear...ratio is 502

Thanks Dragon

HI Guys i have a 1985 rd 686 triaxle and ive got a vibration and rumble noise in the back rear,, the yolk was lose and the u joint was bad,, replaced the joint and tightned up the yolk but the noise is still there, was looking for a diagrahm of the rear so that i can replace the pinoin bearings also maybe someone can tell me where would be a good place to buy a rebuild kit for that rear...ratio is 502

Thanks dragon

Hey thanks for the answers guys.. and yes it has the charge air cooler and it has a 13 over tranny.. again thanks for the input

Gary

Hi Guys.. I have a 1985 rd 685 triaxle with a 300 engine i have a lot of blow by from the engine and no idea how many miles is on the motor,, i am going to rebuild the motor this spring and was looking for more power.. can i get a kit with bigger pistons and tubes that will give me more horse power..I have installed a 350 pump turbo and injectors on the engine but still not enough pulling power.

dragonslayerpa1@yahoo.com

Thanks

Is this what you're looking for?

HVAC Control Panel.pdf

Yea it looks close to what i need at least that one is in one peice lol.. if it is for an 85 after 86 they changed units....

I have a 1985 RD 688s triaxle i am in need of a heater cover that has a/c controls i have contacted Mack and they told me that they can no longer get this item and it has been discontinued... so i must look for a used cover is there any one out there that may know of a place where i can get this cover...Thanks

Dragonslayerpa1@yahoo.com

Yea thats what i thought and my turbo is 17 yrs old i thouoght it had to be bad...

Thanks for the help on my pump... last week i moved the rack forward and lowered the ram made little change to the power i also did not notice any change in the smoke, so this weekend i turned the screw out or counter clock wise and now i have lots of black smoke havent been on a hard pull yet but im sure it is going to be a lot better on the hills... i have also installed a boost gauge and it runs up to around 30 when i lug the motor down...i have also noticed that it seems to start easier and runs a little quiter and smoother.... Thanks for all of your help guys

Dragon

could someone please explane how to increase the fuel presure on my 350 mack i have a ambach pump i can only get about 850 on the pyro when pulling the mountians...very little black smoke and the no puffer valve the truck is very lazy.. been looking but cant find anywhere to help me out... thanks

dragonslayerpa1@yahoo.com

I'm very glad to have found this website - THANK YOU, THANK YOU!!!

Patient: 1986 RW613 Superliner w/ Mack E6 350 4v motor, 13 spd eaton, 4:42 ratio, lacks power to get out of its own way

Symptoms: max about 950 degrees under load post turbo, max 22-25 psi turbo pressure depending on weather conditions, operates around 190 degrees on coolant temps, 30-65 psi oil pressure dependent on rpm's, air cleaner restriction less than 5 on the meter. Last pull home with 15k lbs on a 50 ton lowboy trailer - truck takes close to 1/2 mile to get to 55 mph on nearly flat ground. Some light smoke under load but not excessive. Truck is normally used to pull a 92k - 95k lb gross weight load.

Past history: Motor out of frame less than 10k miles ago, new rings & new bearings installed. Mack stamped .010 crank and all parts still showing hone marks & looking like new. Valve jobs done on both heads. Rebuilt injectors installed. Within last 5k miles installed a rebuilt fuel injection pump after old one siezed up. Mack set the fuel timing last year & dyno test showed 265 hp output. Repaired leaking intercooler last year. Puff limiter valve on front of AMBAC pump has never been connected or working to my knowledge.

The truck has always been slow but then again, it was always much faster than the old B61 I started with!

The truck sits sometimes for months at a time before it is used. My last check of the fuel flow looked good, the vent tube on the fuel tank is routinely checked as dirt dawbers have clogged that in the past causing problems. While the fuel filters have not been changed recently, they have not seen 3k miles yet. I do not believe that they are the problem.

I'm thinking that this puff limiter valve could be an issue although the injection shop made no mention of it when I got the rebuilt pump. I plan to go over the valve adjustment again while it is here at the shop. Last check of the turbo and the intake system looked good without any slop or serious leakage. The EGT seems low most of the time like there is very little fuel getting to the engine. Prior to Mack setting the fuel timing, I had timed it by ear and smoke and they said I was very close. It ran better the way I had it adjusted but it has always been slow on the pull. The dyno test proved my thoughts that this engine was putting out less than it should be.

Any suggestions to remedy this situation would be appreciated. I'm even considering turning up the pump if that will help. I've about had it with this old mutt and I'm thinking of looking for a replacement if I don't get it to behave!