Freightrain Posted 15 hours ago Author Share Posted 15 hours ago Well, another update. Not a good one, but work has been done. I got an injector puller and tried it today. Lots of air chisel and wrenching.....got ONE out. That's it. I got another one about 1/2 out and it pulled the spacer out. Not sure if it screwed the threads in the injector? Will get an m10x1.0 tap from work and check it tomorrow night. Two injectors have different threads(larger) in the injector compared to the other four. I stripped one of those spacers already. I think the puller has those thread adapters to fit. Haven't checked into it. I loaded stuff up and brought home so I can work on them easier. WTF was Mack thinking with this design? It has near 3" of injector you have to PULL out. A simple undercut would have made this a WHOLE lot easier. Maybe an O ring at the top to keep crud out? Anything. I called local pump shop. Ya, cubic money no matter what I even consider doing. That's a no go. I may have him go through the injectors or replace the ones that get screwed up. 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590111 Share on other sites More sharing options...
mowerman Posted 14 hours ago Share Posted 14 hours ago That sucks sorry Larry Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590113 Share on other sites More sharing options...
Joey Mack Posted 14 hours ago Share Posted 14 hours ago Those injectors are a pita if they are rusted in the bores.. the oring decides to become 'one with the injector cup'... fun stuff... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590115 Share on other sites More sharing options...
Popular Post fjh Posted 14 hours ago Popular Post Share Posted 14 hours ago 23 minutes ago, Joey Mack said: Those injectors are a pita if they are rusted in the bores.. the oring decides to become 'one with the injector cup'... fun stuff... It’s not funny but interesting that if it had a Robert Bosch set up on it there’s is an oring on the injector about a 1/2 inch from the top! When equipped with Ambac pump the injectors had a stupid foam gasket at the top that simply rotts away after sever l years and you end up where you are! So the morel of the story liberal amounts of neaver seaze is required on install on the body of the injector lesson learned by the school of hard knocks! just sayin! 3 Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590119 Share on other sites More sharing options...
mrsmackpaul Posted 14 hours ago Share Posted 14 hours ago This is pretty common with pulling injectors on anything with a bit of age I have tried a puller once and just tore the top out of the injector Once the injector is stuffed just turn the head upside down and belt it out with a chisel and big hammer, don't miss the punch or you'll likely stuff the head completely I only use the pry bars I had shown before and just work away slowly at it These are simple compared to some old Cat stuff with nuts and special spanners They take a lot of time to get out Paul Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590120 Share on other sites More sharing options...
Freightrain Posted 14 hours ago Author Share Posted 14 hours ago Ya, such a stupid arrangement. Definitely not made for "ease of maintenance". I guess they design it for a lifetime of use only. I looked at pricing heads and that was $4000 a pair. Guess I will be pounding these out. 2 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590121 Share on other sites More sharing options...
fjh Posted 14 hours ago Share Posted 14 hours ago 3 minutes ago, Freightrain said: Ya, such a stupid arrangement. Definitely not made for "ease of maintenance". I guess they design it for a lifetime of use only. I looked at pricing heads and that was $4000 a pair. Guess I will be pounding these out. Hopefully the injector sleaves stay in if not you got another issue to contend with! If you can zip wheel or even torch of the studs and get the injector to turn in the bore you may get lucky! Lots of WD 40 ! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590122 Share on other sites More sharing options...
Popular Post mrsmackpaul Posted 13 hours ago Popular Post Share Posted 13 hours ago Gently gently wise grasshopper Paul 3 Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590123 Share on other sites More sharing options...
Joey Mack Posted 13 hours ago Share Posted 13 hours ago I didnt do this with mine, but i wonder if you had access to a large arbor press and blocked the head at a good angle and pushed them out... Hell I dont know... I just know it took me hours to get mine out... Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590124 Share on other sites More sharing options...
mrsmackpaul Posted 13 hours ago Share Posted 13 hours ago That may work Joey, lots of possum piss and patience is my go to, if it is really that rusted in, it's gunna be a stuff about getting them out Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590127 Share on other sites More sharing options...
Joey Mack Posted 13 hours ago Share Posted 13 hours ago For sure Paul... for sure Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590128 Share on other sites More sharing options...
Joey Mack Posted 13 hours ago Share Posted 13 hours ago The worst ones ive done was pulling pencil injectors out of 2 John Deere 3179 DF heads. They were auction engines and when I got them from my customer, the pallets under them had plants and grass growing out of the pallets because they were outside for years.. I worked my a$$ off on those to get them ready for the machine shop.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590129 Share on other sites More sharing options...
Freightrain Posted 13 hours ago Author Share Posted 13 hours ago 40 minutes ago, fjh said: Hopefully the injector sleaves stay in if not you got another issue to contend with! If you can zip wheel or even torch of the studs and get the injector to turn in the bore you may get lucky! Lots of WD 40 ! Ya, my next biggest concern is the sleeves. I was reading in the manual about replacing the sleeves. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590133 Share on other sites More sharing options...
mowerman Posted 12 hours ago Share Posted 12 hours ago Too many likes … again good luck Larry Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590136 Share on other sites More sharing options...
davehummell Posted 2 hours ago Share Posted 2 hours ago Those prechambers on old cat heads were just a nightmare to get out sometimes and yes the injectors on the Mack heads were more times them not a real battle. I used to mess around with the old hit and miss engines and getting a stuck piston out was always great fun. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590143 Share on other sites More sharing options...
mowerman Posted 1 hour ago Share Posted 1 hour ago Well, from what I see at this point, lots of penetrating oil and patience, oversize Crecent, wrench around the base and try to twist them a bit back-and-forth. I think that it’s gonna be our best friend at this point, especially the patients. I know that that spelled right auto spell. Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590148 Share on other sites More sharing options...
Joey Mack Posted 56 minutes ago Share Posted 56 minutes ago Too bad you couldnt use the injector studs to help jack the injectors out. The 673 I did, did not have enough room to get a wrench in there to do it. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590149 Share on other sites More sharing options...
mowerman Posted 53 minutes ago Share Posted 53 minutes ago I had the same issue years ago when I took mine out but spray oil and a big bar did the trick Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590151 Share on other sites More sharing options...
mowerman Posted 4 minutes ago Share Posted 4 minutes ago And yes Joey thinking about it guess a large wrench will not fit in there Quote Link to comment https://www.bigmacktrucks.com/topic/75768-300-rebuild/page/23/#findComment-590153 Share on other sites More sharing options...
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