Page 1 of 2 1 2 LastLast
Results 1 to 10 of 19

Thread: 5-ton NHC250 Injector Pump

  1. #1
    Sergeant Major captcarc's Avatar
    Join Date
    Jun 2014
    Location
    Arlington/TX
    Posts
    104
    Thanks
    1
    Thanked 8 Times in 3 Posts

    Default 5-ton NHC250 Injector Pump

    About a year ago I had the fuel injector pump replaced on my 5-ton NHC250 because the truck was barely running and had a minor leak at the injector pump "weep hole". Now it's running bad again with a much worse leak at the weep hole on the rebuilt pump. The truck probably has less than 20 hours and 200 miles on the replaced pump! Any thoughts other than the obvious, being replace the darn thing again at the tune of about $2K? thanks!

  2. #2
    I'm the dude, man. Steel Soldiers Vendor simp5782's Avatar
    Join Date
    Jun 2011
    Location
    Memphis, TN
    Posts
    7,071
    Thanks
    106
    Thanked 6,932 Times in 3,040 Posts

    Default

    Quote Originally Posted by captcarc View Post
    About a year ago I had the fuel injector pump replaced on my 5-ton NHC250 because the truck was barely running and had a minor leak at the injector pump "weep hole". Now it's running bad again with a much worse leak at the weep hole on the rebuilt pump. The truck probably has less than 20 hours and 200 miles on the replaced pump! Any thoughts other than the obvious, being replace the darn thing again at the tune of about $2K? thanks!
    pumps only cost about $600 to rebuild and an hour of your time to install. not driving the truck is as bad as anything else that can be done to them. Orings can go bad at anytime. maybe that just replaced the basic stuff and only some of the orings.

    I have the take off injection pump from my NHC250 that had 170,000 miles on it in 2 yrs and it never leaked at all.

    I have my take off pump for sale if you are interested.. You would have to add a dual fuel line setup to your truck if you don't have it already. My pump is about 40 percent over stock and a #16 button.
    2008 F-250 6.4L Powerstroke
    1984 AM General XM923A4 ( Big Cam III NTC-400, HT4B turbo, Intercooled, #10 button, Dual fuel Line setup - MRAP Aluminum Radiator - 7" Ram Air Intake system - Dual 115 gallon tanks - Air Conditioning - 145amp alternator - Puradyn Oil Bypass system, CAT 7155 16speed transmission, Oshkosh 55000 Transfer Case, riding on 16.00 AT-3s on HEMTT wheels. )
    M923A1
    M931A2
    M1083
    M1078
    M796 Bolster
    M322 Equipment Trailer
    MEP-804A


    901-318-8353 for Help in and or around the Memphis area or transporting in the southeast. Text me first before calling.

    Tires (HMMWV, 395s, 1600s) and Transportation Vendor

    Wes

    Videos at https://www.youtube.com/results?search_query=5782simp

    https://www.youtube.com/channel/UCTd...D4dOJidPFnmYGA

  3. #3
    4 Star General sandcobra164's Avatar
    Join Date
    Nov 2009
    Location
    Leesburg, GA
    Posts
    2,917
    Thanks
    162
    Thanked 2,622 Times in 1,062 Posts

    Default

    My injection pump blew the exact same seal about 2 years ago. I wasn't quite as fortunate as the weep hole was plugged so it blew out the seal on the other side and pumped about 7 1/2 gallons of diesel into the engine oil. I guess you could say I got an advanced engine flush on that trip. Removing the injection pump is honestly not that difficult. Break it down into simple tasks. Remove the throttle and transmission linkage, remove fuel lines, remove wires and lastly remove the bolts that hold the flange to the back side of the air compressor. Mine already had the 7/16" 12 point bolts next to the block. My only special tool was a curved 7/16" 12 point box wrench. You can do this. My rebuild was only $325 or $350, can't remember exactly. For $2000 I could make money bringing you a rebuilt pump and putting it on traveling from Georgia and getting a hotel room overnight. This is not a hard task to complete and myself and other members on the board will talk you through the process.
    84 AM General M923 "General Non-Sense"
    85 Chevrolet M1028 CUCV "Sarge"
    05 Silver Eagle M1102 (Sarge's New 4 Wheeler Hauler)

    Gone but not forgotten....
    71 AM General M35A2 "Big Trucks"
    87 Pribbs Manufacturing M105A2

  4. #4
    Sergeant Major captcarc's Avatar
    Join Date
    Jun 2014
    Location
    Arlington/TX
    Posts
    104
    Thanks
    1
    Thanked 8 Times in 3 Posts

    Default

    Thanks to both of you! Please provide where to get it rebuilt of you can?

  5. #5
    I'm the dude, man. Steel Soldiers Vendor simp5782's Avatar
    Join Date
    Jun 2011
    Location
    Memphis, TN
    Posts
    7,071
    Thanks
    106
    Thanked 6,932 Times in 3,040 Posts

    Default

    Taylor diesel in Memphis. I can take them one to rebuild for you and you just send me yours as a core so I have it. Or mail them yours. About a 3 day turnaround
    2008 F-250 6.4L Powerstroke
    1984 AM General XM923A4 ( Big Cam III NTC-400, HT4B turbo, Intercooled, #10 button, Dual fuel Line setup - MRAP Aluminum Radiator - 7" Ram Air Intake system - Dual 115 gallon tanks - Air Conditioning - 145amp alternator - Puradyn Oil Bypass system, CAT 7155 16speed transmission, Oshkosh 55000 Transfer Case, riding on 16.00 AT-3s on HEMTT wheels. )
    M923A1
    M931A2
    M1083
    M1078
    M796 Bolster
    M322 Equipment Trailer
    MEP-804A


    901-318-8353 for Help in and or around the Memphis area or transporting in the southeast. Text me first before calling.

    Tires (HMMWV, 395s, 1600s) and Transportation Vendor

    Wes

    Videos at https://www.youtube.com/results?search_query=5782simp

    https://www.youtube.com/channel/UCTd...D4dOJidPFnmYGA

  6. #6
    4 Star General sandcobra164's Avatar
    Join Date
    Nov 2009
    Location
    Leesburg, GA
    Posts
    2,917
    Thanks
    162
    Thanked 2,622 Times in 1,062 Posts

    Default

    I used R&S Diesel Injection, 612 W Roosevelt Ave Bldg A, Albany, Ga, 31701. Their phone number is 229-435-0578. I'm not saying they are better or worse than the business Simp recommended, simply supplying the information on the company that rebuilt my injection pump 2 years ago.
    84 AM General M923 "General Non-Sense"
    85 Chevrolet M1028 CUCV "Sarge"
    05 Silver Eagle M1102 (Sarge's New 4 Wheeler Hauler)

    Gone but not forgotten....
    71 AM General M35A2 "Big Trucks"
    87 Pribbs Manufacturing M105A2

  7. #7
    Sergeant Major captcarc's Avatar
    Join Date
    Jun 2014
    Location
    Arlington/TX
    Posts
    104
    Thanks
    1
    Thanked 8 Times in 3 Posts

    Default

    Thanks! I've removed the pump...fairly easy...found a place in East Texas and will drive it there tomorrow for rebuild. Then I'll need help to reinstall/time it. Thanks again!!!

  8. #8
    I'm the dude, man. Steel Soldiers Vendor simp5782's Avatar
    Join Date
    Jun 2011
    Location
    Memphis, TN
    Posts
    7,071
    Thanks
    106
    Thanked 6,932 Times in 3,040 Posts

    Default

    Quote Originally Posted by captcarc View Post
    Thanks! I've removed the pump...fairly easy...found a place in East Texas and will drive it there tomorrow for rebuild. Then I'll need help to reinstall/time it. Thanks again!!!
    There is no timing. Just put it back on. And fire it off
    2008 F-250 6.4L Powerstroke
    1984 AM General XM923A4 ( Big Cam III NTC-400, HT4B turbo, Intercooled, #10 button, Dual fuel Line setup - MRAP Aluminum Radiator - 7" Ram Air Intake system - Dual 115 gallon tanks - Air Conditioning - 145amp alternator - Puradyn Oil Bypass system, CAT 7155 16speed transmission, Oshkosh 55000 Transfer Case, riding on 16.00 AT-3s on HEMTT wheels. )
    M923A1
    M931A2
    M1083
    M1078
    M796 Bolster
    M322 Equipment Trailer
    MEP-804A


    901-318-8353 for Help in and or around the Memphis area or transporting in the southeast. Text me first before calling.

    Tires (HMMWV, 395s, 1600s) and Transportation Vendor

    Wes

    Videos at https://www.youtube.com/results?search_query=5782simp

    https://www.youtube.com/channel/UCTd...D4dOJidPFnmYGA

  9. #9
    Sergeant Major captcarc's Avatar
    Join Date
    Jun 2014
    Location
    Arlington/TX
    Posts
    104
    Thanks
    1
    Thanked 8 Times in 3 Posts

    Default

    At a quick glance, I didn't readily see any provision for timing it. So, just plug and play? The 3 blades can just plug in any recess and it's good?

  10. #10
    Sergeant Major captcarc's Avatar
    Join Date
    Jun 2014
    Location
    Arlington/TX
    Posts
    104
    Thanks
    1
    Thanked 8 Times in 3 Posts

    Default

    And regarding the solenoid on top...is it correct that a tandem wire set is connected to the bottom connection with nothing connected to the top one?

Page 1 of 2 1 2 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •