j hancock

The ESI (Extended Service Interval) was recommended by Mack to have an oil/filter service at 16,000 miles or 3 months or 300 engine hours. Whichever happened first. The ESI Plus with three filters and larger capacity pan was 25,000 miles or 6 months or 600 engine hours. With the advent of better synthetic lubricants, change intervals have lengthened these days. Same engine. In the sales literature, the engine is listed as a 237 and in the service books, it is called a 235. Dunno beyond that.

Hope the weather is good for the show and a good celebration and remembrance for Ed M.

All the ones I had (left and right side) featured the rolled edge like the one in the top of the picture.

The style shown on top match what is in the 1941 DE and a 1939 EF I had a while back. Change of design or vendor? The ED/DE were done and did not return after the war but the E's continued for years after the war and the doors were the same on the model EF, EQ, etc.

Nice! Fun to see the spot mirror aimed at the top of the stack.

Haven't watched Ice Road in years because it got way too much "reality" in the script. Condolences to the Ward family.

Is the 84 cab an air ride cab? The set up is a little different than the 74.

Time for a bigger cave!

If the BAR sign goes missing... It would look great in your man cave!

Score! Proves you can't see both sides of the truck at the same time. "They still working the pit opposite the piggy bank on 93? " Right, just over on 3A.

Camel back works really well in the dirt and air doesn't. Depends how the truck will be used. A Mack dealer could do the job as well as independent frame and spring shops. Make a few phone calls in your area will get you the price. Also, instead of doing the conversion, it may be just as cost effective to locate a truck with camel back suspension already in place. Since you are in Miami, there are probably some camel back Macks sitting on the docks.

I don't recall seeing this B61X before until this show. Weaver has run Macks for may years so the spokes may have been in their inventory of old R parts. The door tag indicated "X" and it had torque rods on the rear. I was talking to a couple of friends while taking pictures and failed to look at the rear spokes for shape. Went through one of Weaver's jobs and got a Mack in the mirror and one out the side.

Shows early design dual drive axle set up including lots of leaf springs.

It is an RD. Interesting hood treatment!

Those manuals would be helpful. 235/237 HP with 3 filters would be the ESI Plus and would require 51 qts to refill.

Classic Autocar DC heavy hauler.

Nice find! Mack manuals can be found on ebay. The 237 HP engine in the truck is pretty much bullet proof. It will either have two or three filters on it. ESI with two filters will have a pan capacity of 28 qts. or ESI Plus will have three filters and a pan capacity of 51 qts. Motor oil designed for diesel engines with 15W40 should be used. Trans and rear ends will use 80W-90, 80W-140 or 85W-140 gear oil. Both trans and rears are checked at plugs to determine fluid levels. Drain and refills will be good considering the truck has been sitting.

Started at Brockway and finished at Mack. Never heard any specific names or group of names for designers and engineers.

Battled for market share against the B model Mack.

The red knob should not be popping with the application of the yellow knob. The red knob supplies air to the tractor protection valve and then the air heads to the trailer. The red knob should pop if there is a loss of air when it drops to 20-45 PSI. If a trailer does loose air, the valve pops the red knob and the tractor will still have air. If everything is working properly, the trailer spring brakes will lock it down. If not, the tractor still has air for applying its brakes in an emergency. There probably is a time for brake release but 3 seconds seems OK for the air to overcome the spring brakes. 5 seconds maybe a little long? Could be a some crud in a fitting causing a restriction.

Vin needs to pack a lunch and head west on 177 to check it out.

In theory either one than. I would see about getting yours rebuilt first.

"Mackdaddy" Dan has one hell of a toy box.

From 1984, Schwitzer 631GC-5103P9 with a center housing # 215SB-169 except for Dynatard. I think you said you have Dynatard? Than use Air Research 631GC-4101P17 with a center housing # 215SB-147. There may be other numbers for the 237 but it is all I have.

I will take the one on the left! Supposedly, the CAT-mobile is the very LAST CAT truck ever. It may be rare but I wouldn't want it for the huge fugly factor!