Dakota Posted December 17, 2019 Share Posted December 17, 2019 My 2003 CH613 has started throwing intermittent engine codes of 8-3 and 8-6 which are described (if I found the correct list of codes) as Electronic Unit Pump #3 and #6. Are these something that I can change out myself? Are any special tools required to do it. Anything I need to watch out for other than #6 is hidden well enough behind the exhaust pipe that I may need to move the pipe some to get to it. Anything I should check first to make sure it's really these that are bad? Nothing looks really dirty and no loose wires that I found. TIA, Steve Quote Link to comment Share on other sites More sharing options...
fjh Posted December 17, 2019 Share Posted December 17, 2019 (edited) yes you can change the pump do replace the bolts when u do it ! How ever the calibration codes need to be installed in the ECU by the dealer once you have replaced it! Edited December 17, 2019 by fjh Quote Link to comment Share on other sites More sharing options...
Dakota Posted December 17, 2019 Author Share Posted December 17, 2019 Are there any special things I need to know before I do it? Is it just unbolt and replace? Thanks Quote Link to comment Share on other sites More sharing options...
wilbur Posted December 17, 2019 Share Posted December 17, 2019 You will need an engine turning tool. Take one out and take off the o rings and put back in the hole. Turn engine over till pump is about 1/4" up and stops going down. Take out and put in new one. Pull down evenly on the bolts. If I remember bolts torque at 65#. Do the same on the other. Quote Link to comment Share on other sites More sharing options...
Dakota Posted December 17, 2019 Author Share Posted December 17, 2019 Thank you Wilbur! Quote Link to comment Share on other sites More sharing options...
JoeH Posted December 17, 2019 Share Posted December 17, 2019 Do these have an alignment pin in the block that should be checked/replaced? At the same time? Quote Link to comment Share on other sites More sharing options...
Dakota Posted December 30, 2019 Author Share Posted December 30, 2019 On 12/17/2019 at 5:44 PM, JoeH said: Do these have an alignment pin in the block that should be checked/replaced? At the same time? I don't know but I may just take this to a local truck repair place that I know of as I'm sure they can take care of it for me and will know everything that needs to be done. Quote Link to comment Share on other sites More sharing options...
Mack Technician Posted December 30, 2019 Share Posted December 30, 2019 (edited) 3 hours ago, Dakota said: I don't know but I may just take this to a local truck repair place that I know of as I'm sure they can take care of it for me and will know everything that needs to be done. You can also download a free E-Tech engine manual off Mack E-Media. Those walk you through it, lots of good pics and descriptions. Make sure you reinstall your heat shield afterwards, it will prolong the pump electromagnet life. Looks like pen oil on it, so you have it covered. Wilbur, was it you who was getting them for a fuzz over $300? Edited December 30, 2019 by Mack Technician Quote Link to comment Share on other sites More sharing options...
wilbur Posted January 1, 2020 Share Posted January 1, 2020 I think they were $260 each at the Diesel Store. So far so good. 1 Quote Link to comment Share on other sites More sharing options...
Mack Technician Posted January 1, 2020 Share Posted January 1, 2020 7 hours ago, wilbur said: I think they were $260 each at the Diesel Store. So far so good. Be curious to see how they pan out. That’s dirty cheap, I may source a couple for the ones I maintain. Quote Link to comment Share on other sites More sharing options...
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