Maddog13407

take the injection pump off the engine, take the side cover off the side of the pump and let it soak in a tub of kerosene for a few weeks. then i usually take a big screwdrive and stick it in the springs in the side of the pump and wrap the screwdriver down with a hammer. usually you can get the plungers freed up and moving. i also made a tool to turn the injection pump to make sure they are all moving. after that reinstall the cover and pump and you should be good to go. usually bad fuel or water in the fuel caused the plungers to stick. Matt

i believe you have the wrong gaskets. my end707 diesel has the firerings in the gasket and gaskets were the felt material not coper. actually the old gaskets i took off i checked the part number and they are the same gaskets as a maxidyne 237 gasket. i think some 711's and 673b and c engines used this gasket. when i took the heads off of my engine the firerings were still stuck to the bottom of the heads. i hit them with a screwdriver and they popped right off, checked the number and ordered new gaskets and they were maxidyne gaskets. i can probably find you the part number if youd like. Matt

fire ring gaskets were not coppers at all. more like a heavy felt gray material and fire rings are in the package also. most of the newer 711's end707;s and end673b and c engines had the fire rings i believe. sounds like you have the wrong gaskets and need the ones with the fire rings. do your head have the fire rings on them now? when you remove the head usually the fire rings are stuck to the bottom of the head. matt

1957 B42SX12729 1959 B613T3762 1966 R609T 3182

the en54o or en464 overhead valve gas engines with a 20 speed 72 series quad box would run with a b61 all day long if not have more ass to it and would start in the winter. the b42's on the other hand were gutless. my grandfather had a whole fleet of them for site trucks and a few single axle tractors. would never start in the winter , said you could hook a chain to em and pop the clutch and heat would be comin out of the heater before the engine would even clear up and run in the winter haha, as for an all around truck just cruisin it would be fine. not for anything else and being a tandem he is right, it will suck what little horsepower is left with the other axle. another thing is the rears, if you ever wanna change them you cant just swap out the hogs heads in the tandems, before 1960 Mack used a wide bolt pattern on the housin and youll be hard pressed to find much faster than 6.00 anythings for them, Matt

pretty bad compared to an overhead valve engine gas or diesel. the en401 continental/Mack was pretty much a site truck engine and way underpowered. good enough for driving around but not much there if you wanna pull any weight with it. then again my grandfather had a single axle b42 and ut use to pull a lowboy with a D8 on it around Syracuse Ny for DW Winkleman. guess it all depends what you wanna do with it. Matt

that rear end is most likely original. seen many r models and u models with that cheap housing. it is deffinately a Mack hogs head. never seen a cheap rear end housin like that on a b model just u and r models. mack seemed to use that housin a lot in the 70's and put their hogs head in it and their spoke wheels on it. the reason i say cheap is almost everyone i have came across was broke around the spring perches on the housing and letting water in.i believe it may be a Rockwell housin thanks, Matt

This engine has the air cooler on top of the motor, the plenum that says Mack across it, doesnt have the air to air in front of the radiator. i want to use the original radiator and shroud. just wondering if the old 711 fan will keep the 300+ cool enough. the 711 had a spacer behind the fan so it stuck out a ways also but the clutch/fan is too big to fit into the shroud. the engine is an ETAYZ673 out of a 1980 Rs600L. thanks, Matt

Putting a 300+ and 10 speed roadranger into a single axle R600. got new mounts made up and engine mounted. the fan on this engine has a clutch and is 24'' with about 8 blades where as the old 711 had a 23'' regular fan on it with 5 blades. my question is is it ok to mount the old fan up as the bigger one with clutch wont fit into the shroud. Will the smaller fan cool this engine enough? thanks, Matt

definately trunion. usually that rubber mount costs about 9 bucks and some change. available from Mack still. just bought a few not too long ago. ~Matt

that Outlaw B75 use to be a familiar sight on the east coast in the early 80's. think i saw pictures of it at a show in Hagerstown , Matt

imput shafts should all be the same as long as both are a 77 series transmission. sounds like you have an issue with the throw out bearing. Matt

several reasons. worn crank or sometime when someone puts the transmission back in they slam it in and knock the thrust washers loose if they are a little worn. just did the same thing to a 673. took the oil pan off to clean the gunk out and found all four washers in the pan. ordered them from Mack, put them back in and replaced pan. probably not good enough for a workin truck but good enough for a recreational driver. Matt

yup wonderful guys to deal with and didnt act like you were wasting their time and would investigate to find something out or work to get something retooled or remade. and they loved to talk!

i think they were around there. i loved dealin with Bob Daub or however you spelled it at Tidewater and parts were really reasonable back then. im pretty sure i paid somewhere between $125 and $175 a piece for them. dont even think they were as much as 350 a pair. wish i had bought more and a pickup full of hood chrome and dash guages! thanks, Matt

I tried puttin the spin on filters from a 237 on my 711 and the block bolted up but didnt have the same amount of holes drilled in the block for the oil passages. i think the 237 had 5 holes and the 711 only had 4. i just put the lubrifiner back on as i didnt want to hurt anything by not having oil run back to where it is suppose to. i think if you find a spin on bracket off an older motor tho you should be fine, just make sure you have the same amount of holes in the block as the engine you remove it to and i think like Larry said, make sure you have the right gasket for it as i think Mack made a few different gaskets and some might block off an oil passage. thanks, Matt

Watts has the r model style box but will work on a b model and still looks original. good battery boxes for a b model are hard to find as in good fuel tanks and fuel tank brackets, especially up north where they like to put liquid battery acid on the road in the winter time. the r model boxes easily fit a b model, just have to drill new holes in the frame or do what i did and use the side bolt holes on the box with a piece of angle iron and drill holes in the back that align with the original holes in your frame. I doubt that there are any reproduction boxes from Tidewater Mack floating around anymore. Wish i bought a stack years ago when they were cheap along with about 20 pair of vent windows when they were $350 a pair! thanks, Matt

just take the old vent windows and door glass with channel atteched to a glass shop. they will cut the new glass for you and glue the window channel back on the bottom of the door glass and into the vent window frames with urethane. ~Matt

most all i have seen are mounted at an angle. only ones i have seen straight are fire trucks or ex fire trucks. have seen a few fire trucks changed over into tractors and they have a spacer block between the frame and the bracket. i guess this was to get the brackets paralell so the side skirts would align with the tank body? thanks, Matt

Allison, in a B model?? isnt that Taboo???

im the one third from the right with the sunglasses and Mack trucks tattoo on his left arm. ~Matt

i believe all the end673p, end711 and end707 engines have the split intake manifolds. at least everyone i have ever seen did. ~Matt

End707 is a diesel. think its around 200 hp or 210. i have on in my B61. good running engine, basically the same as a 711, Matt

J8C Champions usually. and the first to foul are #2 and #5. least thats how it is with our B42 with a 402 in it. You can get most of the distributor parts right at Napa also. not too many of those boat anchor gutless 401/402's around anymore haha. ~Matt

was lookin at the Mack Driven for a century book the other night and theres a picture of one of the Pelletiers old RM800's with a double load on it on page 152. ~Matt