Steve L

Sounds like the water valve that’s usually mounted on the firewall is stuck or seized. 

I purchased a new 350 Valueliner in early 87 and that had an ambac pump. I believe the Robert Bosch uses a 4 bolt mount and Ambac has 3. To change pumps you need to redrill the block if not already done by Mack’s, my fading brain doesn’t know.  Remember the RB pump sits further forward on the engine so injector pipes also need replacing. I’m doing that now on my lads truck, converting a 454 EA7 computer engine to mechanical, the tacho drive might be the challenging   
part. 

I have experienced this last week, a mate of mine removed the oil cooler on his E6 to replace leaky water gaskets, assembled everything including new filters and after starting the oil pressure took ages to make 30psi ( it usually makes 70 immediately ) so he called me, I told him not to run anymore until he fitted an aux gauge on the crank pressure, 30 psi at the crank so 30 is constant throughout the engine. So reworked everything he done and the last resort before removing the sump was to change the filters again. Removing the filters found then half empty even though he filled them before assembly, so we fitted new filters and the oil pressure was back to normal. In 50 years of servicing and repairing Mack’s I have never seen this. Not sure what make the filters were but were non genuine, they only had part numbers on them so I guess could have been fuel filters. 

True terry, my understanding is all Mack’s had shutters until the 4 valve was introduced when the intercooler was mounted in front of the radiator. I’m sure the thermostatically controlled fan hub saved fuel. I remember my 237 F model belts would screech when the shutters closed if belts weren’t tight enough. Imagine how much the load increased on the fan at 2100 revs, I noticed the later cool power still had shutters but also had 3 belts. 

I think yool find the shutterstat hard to find now Paul. I used to love driving through the night listening to the shutters opening and closing, brings back old memories. Remember the ole B model 711 engine rattling and knocking while idling ( that truck prolly done my hearing in ) not like my E7 now which sounds like a motor car engine and doesn’t wake the neighbours at 6 in the morning grrrrrrrr haha! Trucks are no fun anymore. Then again I could fit an air starter and remove the muffler, I’ll be at home again and won’t feel like a steering wheel attendant. Gimmee a R or B model any day. 

The clutch fan is to help control water temp, usually on later models, whereas the fixed fan doesn’t so it has shutters to control the water temperature, both types still require a thermostat. Personally I prefer shutters, they give an audible note of how the temps are going.  The offset blades do reduce noise even at 1250 revs.

Wish it was that cheap here in OZ. We have just past $1.40 a litre. 

You can do something about cab corrosion which I had to do recently. I have a 1981 very rare 200 ton E9 Superliner which I am presently restoring. Mack didn’t galvanise the R cab until about 1984 here in OZ ( I believe the F cab was never galvanised) even though my Superliner had a recent facelift before I purchased it rust is starting to show through again. Solution, swap the cabin for a galv cab. Problem for me here is, R model cabs are like hens teeth to find and when you find one they want an arm and leg for it. Replacement cabins should be plentiful in the USA. Anyway cab corrosion sorted. 

Don’t forget to disconnect the original existing cables where they enter the rocker covers when you try this. 

If it has circuit breakers maybe a short in the cabling is causing the breaker to pop then reset. I have known breakers to do that every couple of seconds. Try running a direct power supply from a remote switch inside the truck and go for a drive. 

It’s a 672ci . . sometimes called a 673 or 675. Horsepower can be from 237 to 350. 1982 most likely 300+ hp . We need more info. Look for the engine number stamped on the block ahead of the injection pump. 

Hey Dajain, let me have the V8 and fit a E7 400 with a manual gearbox . . . Driveline problem solved 😝

Yes Rob, mismatching tyre circumference is the quickest way to cause tyre delamination and failure. 

I used to pull around 100 tons (don’t know what that is lbs) with a 237 F model 6 speed with 4.17s and never had a problem. So I’m sure it would do it easy Bliue 

Hi guys I’m looking for a rear mount pto for a 12 speed TRTXL1070 gearbox. Hopefully someone has one laying around.  

Never know who takes over who these days eh mate

Please correct me if I’m wrong, but isn’t Freightliner under the Mercedes or Daimler umbrella 

Yep mine goes near a week too Rob. Until recently I worked in very remote parts of Australia most of my life and the N95 always seemed to pick up a signal better than most smart phones I was with. Don’t know if it was the Nokia, the phones of the era or I just got lucky, but one things for sure - I don’t think the new phones are smarter. 

I noticed on the trucking TV show  HHA had tall sticks in 1 or 2 of his trucks ( not that he’s a show off or anything haha! )   The show where I go and take a dump while on. 
talking about old school, my 16+ yo Nokia slide phone fell in a bucket of strong truck wash. . . Kaput! . . Tried a couple of new fangled models 😬 who the hell wants flashing lights, stupid jingley ring tones and run between charging stations, I just wanna make calls. So set about finding another N95, as luck had it a phone store found a new old stock one 😁🤗

BTW, I have a 1981 200 ton Superliner (which I’m just starting to restore) its all original and all Mack except for the second spicer gearbox. I have it’s build sheet and a picture of delivery when new and it came out with different air cleaners which are still on the truck. I’m often told these cleaners meant a Cat or Cummins engine, but not so. I wonder when the Mack air cleaners were introduced, maybe after 1981. 

Your prolly right Paul, I only ever purchased Mack and ALL Mack. If I wanted a bitsa truck I would have gone KW. sadly Mack have gone that way too. 

That’s right Swishy, also you can apply the brakes gently if the foot or hand piece malfunctions.  My CH has a push pull button so it’s on or off only, they have definitely gone backwards. 

Here it is if anyone’s interested 

That’s them Rob. Here the Donaldson ones are predominantly plastic, cost around $150. The 6” chrome or stainless pipe can be picked up anywhere, the 3 leg support bracket is hugely expensive, there’s a guy in Toowoomba making stainless ones. And last but not least is the friggin air cleaner they’re like hens teef to find. There’s one side for sale here on gumtree and the joker wants $2.500 for it. ( I think he’s playing with something ) Mack’s haven’t supplied these for years. You don’t see many on American Mack’s I guess they’re not popular there. I’m referring to the air cleaners with the row of black plastic bolts around the top, all Mack’s were fitted them here in OZ. . . . . anyway I’m off to the dunny. 

Unfortunately autocardc I don’t think Volvo have the capability or the interest in producing monster trucks like Mack’s 

used to.