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General Diesel Tech Farm equipment, Medium Duty, Big Rigs, and other General discussion can be found in here. |
03-21-2018, 02:46 PM
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#1
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
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Posts: 10,868
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Zexel Inline on cummins 3.3/3.9
The buys on the earthmoving side of the house have a 4 cylinder cummins in a Komatsu dozer. The engine started to haze badly, so they pulled the pump and nozzles to have them gone through.
The tech is trying to spill port time the pump according to the Cummins installation procedure, and the fuel stream never stops. I was asked to help out, and I have made 4 complete revolutions of the engine trying to be certain that the pump isn't out of phase, and it never stopped flowing fuel.
What would be the cause of this? I want to be certain we aren't missing something before the pump is pulled back off.
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03-21-2018, 09:33 PM
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#2
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
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Posts: 10,868
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Pump shop said to crack the throttle just slightly
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__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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03-22-2018, 09:54 PM
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#3
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Name: andy2
Title: Green Behind the Ears
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Join Date: Sep 2012
Location: Ontario,Canada
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Posts: 93
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I thought that most or likely all Cummins inline injection pump applications used the inj pump lock pin ?
Do you have the ESN ?
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03-24-2018, 08:26 PM
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#4
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Name: Ejh1
Title: Rookie
Status: Not Here
Join Date: Feb 2018
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Posts: 2
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Are you rotating Engine or pump? Is it possible that pump gear isn't fully seated and pump isn't turning
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03-24-2018, 09:17 PM
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#5
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
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Posts: 10,868
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I didn't have the chance to go back to this. The gear cover was off and the pump was rotating.
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__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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03-24-2018, 09:51 PM
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#6
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Name: Ejh1
Title: Rookie
Status: Not Here
Join Date: Feb 2018
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Posts: 2
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Fuel shut off On?
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03-25-2018, 09:28 AM
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#7
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
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Posts: 10,868
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It was in the run position (key on)
Sent from my XT1575 using Tapatalk
__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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03-25-2018, 09:38 AM
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#8
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Name: turbo2387
Title: Nipple Fluffer
Status: Not Here
Join Date: Jun 2011
Location: Indiana
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Posts: 665
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Is this a pump that bolts on from the top with for bolts? If it is during installation you can get the throttle/rack arm positioned all the way forward and everything looks perfect until you go to start it.
Last edited by turbo2387; 03-25-2018 at 09:49 AM.
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03-25-2018, 12:18 PM
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#9
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 10,868
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No, it's not a cartridge. I've done several of those. This a Zexel that looks similar to the body of an A Bosch or Delphi inline. It has screw in delivery valve holders like a Bosch. But no studs/nuts on top. I will try and get more info on Monday if I have time.
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__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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03-26-2018, 06:41 PM
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#10
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Name: Yotadzl
Title: Diesel Enthusiast
Status: Not Here
Join Date: Feb 2016
Location: Oregon
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Posts: 234
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Pull the side cover off of the pump and make sure the rack is moving when you turn the key on. Most "ag" type governors use a spring to pull them into a starting fuel position. Usually timing is done in full start position, with some exceptions. If the rack isn't moving either the spring is broken or the rack is sticking. If the rack is in a shut off position the fuel won't cut off. Also make sure if you pulled the center out of the delivery valve that the holder is torqued back down. If its not or the whole valve is pulled out then galley pressure will come out of the holder and it won't cut.
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