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Absolutely, thank you.

old school R looks real nice.. pete wrecker just a "little "fancier then the '57 Diamond T Mack had!!

the wrecker always kept a few plastic axle caps (courtesy of the new deck sets which came in to dealership).till they went to HD plywood . ..hooking a tandem . front drive chained up to frame before raising with wrecker ; axles removed from rear drive then caped with plastic covers. NOT every hook needed all the extra work, every job was different. driveshaft(s) down or axles pulled ;;;; rain/snow /dangerous location ::: did a road call I=84 dealing with loaded gas tanker ===what rule book!!! fortunately it was many years ago< won't find my a-s-s out there today. don't remember ever hooking a H model :::(back on topic=LOL)

Yep. Not the right pressure. Like fjh said, 60-80 psi is good. Im still looking for a chart or whatever is out there with pressure ranges..

Well that's a problem. I've seen several for sale. The one you posted 691 GC225M seems to open at 44 PSI. There are some that are identical that open at 54 PSI. There must be a couple more different ones . I would like to know which one the truck should have. I know that there were some that were too high pressured and woud blow out orings. Vin 1m1aa18y61w139047

I have a 1980 Mack MC. I have cleaned up all my fuses and noticed all the circuit breakers are rusted and in very poor condition. They are so rusted I can only read on it's a 20 amp. Does anyone have a drawing or diagram of what voltage the circuit breakers are ?? Paul

Some Nice lights in it

I’m interested

Really you want to remove all the 1/2 shafts, If you only remove one side, the spider gears in the diff get quite a work-out and no lube. You can chain up the front drive if you pull from the front, and just pull the 1/2 shafts in the rear drive as long as the front drive tires don't touch the road, it will be ok.

I bet this is it.. PAI sells them

Post your vin Heinz will fix ya up!

Our 1st F model Mack was a 1976 Coolpower with a 6speed box on 44@ RSend. We did not know how it would survive with only 6 gears ......... but no worries it was capable of doing what we threw at it comparing to other multi speed cog boxes the F Model mack on float work was the next best thing to driving a auto box doing half the gear changes as a screemer powered. The F model had wide steps between each cog. THe Mack F model had a fibre glass cab that the doors squeaked and rattled most notable by the mirror strut to help support door mirrors. The gearing was OK but you tend to come down hills on the dynatard either in too lower gear or to higher gear with no gear in between. Site Shift 60t on Drake Swing Wing float 30t Bakers oven on Quad axle folding gooseneck float Our other Mack F model is a coolpower with 10 speed mack box ... 8 wheeler set up as a tilt tray (U mob call slide back) the cab is fibre glass with tin doors = much better than F/G = less squeaks and rattles Loading mlitary Mack on step deck @ Mack Muster 2010? When something fails .................... we do our own recovery work LOL cya

i was talking to a younger "mechanic" a few years ago about tow/push starting cars with auto trans. he said no way, cant be done!!! he just so happened to have a 59 Pontiac Catalina as a daily driver. so i challenged him. "take the battery out, and have your wrecker driver push us up to 35 MPH." they both accepted the challenge. at 35, i told him to turn the key to run, and drop the trans from neutral to drive. he was amazed when the engine started. back then, the auto trans had a live pump connected to the output shaft of the trans unlike cars today with the pump connected to the input shaft of the trans.

I can't believe I'm gonna say this. Saw a few new VHDs set up as dump trucks. They look better than the new Granite (or whatever they call them now)

Mark,, I wasn't thinking at the time.. maybe he posts a selfie..

Shoulda got a picture of The Heinz, not that the one of Dougie isn't enough.

Ok I went slightly below the fill hole. When I had it apart for brake work the outer bearing was oil lubed and the inner is greased. There’s a seal in the hub that keeps the oil away from the inner bearing.

Paul, Actually, it was my Mom who had to stop the truck while Dad was slumped over the wheel and already in Heaven by that time. In other words, he was gone before he even hit the wheel. Mom did get the rig and trailer stopped and two very kind gentlemen finally stopped to try to help her but...as mentioned, he was already passed on by that time. Here's the crazy part of that day: They wouldn't let my Dad's former boss identify his body, my Mom had to do it. When they went into the room to identify him, the stupid idiots hadn't even closed his eyes - they were staring right back at her and it scared the **** out of her and angered her at the same time! 😡 (I also want to thank those of you who have posted photos of those classic Mack F model cabovers! I still want to somehow take a ride in one again and - just for the fun of trying, I'd love to try to see if I could even drive one of those rigs even if it's just a few feet).

Well done on the 37 years and how ever many you other blokes have Paul

Your only starting Mech.... Paul

Congratulations to you too.How many more years??? Paul

I remember in the early 70's as a dispatcher for Matlack supervising a recovery, the shop foreman told me to be sure the wrecker driver removed both of axle shafts on the same side of the R-600 maxidyne / 5 speed and capped them with cardboard. I have to assume this did the same as dropping a driveshaft???? And a lot easier on a snow bank!!!!

I went to the Spencer Truck show today. It was a nice day, the show was cool as always, but it was a small show, and there was a threat of rain. I did get to meet ''The Heinz'' and a friend of his. They were really nice yooung guys from a couple hours away.. Turns out The heinz and I worked for the same Mack dealership just at different locations. I'm sorry I dont have a lot of pictures. It takes an effort for me to post them.

Yes ... barely getting 20psi...at idle. I've already done the diag. I I tightened the jam nut on the check valve and it somehow jumped up to 70 .. but now it's back to low pressure. Hence why I'm needing the part number. I'm pretty sure the check valve should not open with the pressure from the hand primer , especially if that pressure is so low that it doesn't even register on the gauge that is hooked up to the fuel rail.