mudslut28

I laughed waaaaaay too hard at that!!

92 Rd 688sx... I am wondering what bulbs the gauges take. I know the air pressure gauge only takes an 1895 but the oil pressure amp gauge and watertemp gauges I am not sure about. I was hoping someone would know before I tore the dash apart. Thanks in advance!

LOL I know this is an old thread but I havent been here for a while. Does it look to anyone else like that saddle is toast also?

Mine has an 8LL and I agree with you...its is pretty long legged on the highside but it is pretty nice for the slower jobs.

I cant imagine 10% hurting my E7 400 considering there are variations of this motor with what? 480hp?

I have been away from the site for a while but I can honestly say even though this was expected it is still a kick in the nuts... F Vulva and the horse they rode in on! I still stand behind every statement I have made in the other thread of what a cancer and pos the V word is...

mackdaddy Im lmao at that reply...not no.. but HELL NO!!! LOL

Herb...and taken it a step farther and targeted them for eradication....

Not sure about the original item, but I replace them with Sanden SD-7 compressors. They make a generic replacement for all different types of hose fittings. In Aus they are around 300 - 350 AUD. However, your problem sounds like the pulley bearing has seized, which can be replaced without de-gassing the system reasonably cheaply.

Thanks Chris. The main thing I didnt wanna do was discharge the system. The a/c worked very well. The clutch on it still turns freely.....the pulley just wont turn. This a/c repair is completely new to me..I used to just not worry about em. How would you get the pulley off of it? I havent really even looked at it very closely or started on it yet. Was just sorta disgusted when I seen it was locked.

I have went through this ordeal on my 800 a few times. It ALWAYS has to have the filters removed. I finally bought a hand primer for it. I thought it normal that they wouldnt pick the fuel up. I will file this one away also..interesting. Mine will not pick up fuel either if it runs out..... I love this place! Been around Macks all my life and still learn stuff every day..

I dont know how it happened but I quit asking questions like that a long time ago but my R Model has been sitting for a couple of weeks and somehow the a/c compressor has managed to lock up while sitting. I thought it was weird that the truck wouldnt start when it will usually start on first turn anytime. Well I boosted it and started and it was locked up tight belt squalling and all. Only in trucking could you ever have stuff like this..lol.

Anybody know what kind of compressor this is and approx cost? Its on a 92 RD688SX 400 Mack motor. Last 5 of serial # 12274. I cant live without my a/c...lol. Thanks in advance!! I wondered why but seeins how it is 16 years old theres a good chance its worn out...lol.

Ill say its a waste of a fine motor also...lol...but whatever floats your boat..

Not to disagree with you here, but in Australia, millions of miles have been done by hundreds of trucks with eaton/fuller ( we call 'em road rangers) transmissions, especially on the northern run to Darwin, over dirt, through water pulling 120 tonnnes or better as a triple road train behind 550 and 600 hp engines of all breeds. And these transmissions have lasted a million miles or more before rebuild. Agreed 3 countershafts is stronger than 2, but the trusty old road ranger has proved itself for many years here. Yep, all those oil lines look scary, but oil coolers are a good idea, and some Mack boxes here have them too!!

Chris the 14708LL has proven me wrong on this one. You were right on the durability part. After a year and a half it has done very well. I had my doubts about it but it has proven itself to be very worthy. I know I did fill it with some very expensive Red Line synthetics though...lol. Hopefully it continues to do as well.

Its not a bad job....just remember as Rob said to brace yourself when you lift it out because at that angle you will screw your back in a heartbeat. Watch your fingers as well..lol. The pain for me was putting it back in.....my patience isnt so great anyways

My R Model could stand a couple of chairs. Thats something I really dont wanna do until I have to. I have bead tightened them once.

Dont forget to check jake springs...a broken one will cause a miss... This is something to look at since you said the jake started at the same time as the miss. Jake is real easy to adjust. Not a big prob with Macks but its fairly common with Cummins.

Im with Herb on this one. Air ride really doesnt have much of a place on dumps. The camelback is the absolute ideal suspension for offroad or dumps. Just another old school brilliant Mack design that cannot be improved upon...the trunion allows pivot to keep equal load on both rear axles.

Noid93 is right on the mark...300/350 usually stamped on them.

MACKS is right but count me among the lovers of the black Mack clouds. If you've been around them long enough you can smell that smoke and pretty much tell the health of your motor.

I know it's just a truck

LOL I appreciate your opinion and agree all the way with the exception of this part..lol. For a lot of us the Macks have been more than just a truck...they have been a part of our lives and they have provided a very good life and living. If people wonder why I get so defensive over Macks..well..Id say most folks do when their livlihood is on the line. I have been surrounded by Macks since I was born and now 37 years later I have 3 of my own. It just galls me to no end to see what these swedish ******** have done to Mack. To the gentleman that works for Mack..I appreciate your hard work and your pride in your job...but lets be realistic...the only thing Mack about the new ones Im around is the rears and the rear suspension.

Also as far as the steel bumpers and all the other "obsolete" stuff you speak of...... the demands in the coalfields have NEVER changed. Light and cheap does NOT work!! Triple frames, 65 rears, 24 inch rubber and other things that cannot seem to be fathomed by today's "Mack" engineers are simply not an extravagance but an absolute neccesity. Case in point a friend of mine that hauls with me every day is running 2 DM800's....take a guess what year they were made? Try a 1971 and a 1973 model...in fact out of 17 trucks on the haul..12 are 800's (RD and DM) with the newest being a 1994 model and 2 are R600's one is an 82 and one is a 92. The other 3 include a Paystar and 2 Western Stars...which are all 3 99's. So as far as saying the truck of old isnt practical...well what Im seeing around here is that laying out our hard earned money for a new Volvo/Mack is what is NOT practical since nothing is being made there that is even remotely dependable as our old dinosaurs..

Dont kid yourself here...the new Macks are what they are...and they arent real Macks....

Maybe in the next redesign Volvo can come up with enough power in one of the Granites to get out of the way of my old 92 E7 VMAC1... I get tired of having to follow them up the mountains every day... The Granites in question are 06 and 07 models with 427's? They are almost a half gear slower pulling a 10% grade at 94000 pounds than my old r model with 18500 hours and counting. For the record though that extra CID sure does help the engine breaking on the Volvo motors.

Well I run them on the lower blocks but use the plain black rubber on the top. They are definitely stiffer but they will outlast the black ones by a substantial margin. Its up to you though. For the price difference and the fact they are already in there.

No didnt mean to come across that way at all Paul...I was talking about the exhaust brake that worked with the engine brake..I think Mack called it the Stealth Combo when it was out? I think even those required a longer pushrod and a stiffer exhaust valve spring so your info was corect as well. Just talking slightly different things I believe. Im sure your knowledge trumps mine anyways so dont ever think Im tryin to step on any toes. I have learned a ton reading this board even after messin with them all these years.

Exactly right Bulldog Man..I have a fine 1986 model 237 complete fan to flywheel with power steering tank sitting in the driveway right beside a nice 1986 Big Cam 3 400 Cummins....both motors are absolutely bulletproof! Im in pretty good shape on the motors.....Mack stuff is gold around here. I thought about selling the 237 but I am thinking I better keep it now. These strip mines are still chock full of 70's-90's DM and RD 800's! What a beautiful day it was when Mack was building both of them at the same time!

My definition of a perfect unbreakable truck would be a late 70's early 80's era DM800 with 20k front axle, 65 rear axle, 300 motor and 6 speed tranny. Damn I wonder what some of these guys around here would pay for them things new these days.... I like a Fuller tranny but them 6 speeds are good stuff!

I always use a big hammer and pound a circle around the tire. I have gotten mad and let the jack down and chunked it in gear before though..lol. Usually beating on the tread of the tire with a hammer done the trick if it was on the stops. I started welding old lug nuts on each side of the valve stem for stops.....eliminated that problem. Sorry its late but maybe theres a little help for someone in there..lol. BTW All of this was on 65k rears and 24 inch rubber.

This is a good post! Learned several new things! Thanks guys!