1990 Cummins Injector Pump - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Brand Specific Tech > Dodge
Notices

Reply
 
Share Thread Tools Display Modes
Old 12-23-2004, 09:47 PM   #1 (permalink)
Registered User
 
Join Date: Nov 2004
Member # 38676
Posts: 12
1990 Cummins Injector Pump

My dad has a 90 Cummins 1 ton 4x4. We think the injector pump has finally gone bad (200,000). How difficult is it to remove the pump. I know the engine will have to be pinned at TDC. I've ran the valves on it before so the pinning's easy enough. Does it take a gear puller to get the drive gear off the pump?? Or does it come off when you remove the retaining bolt. Does the gears have timing marks that have to be matched up when it's reinstalled?? Or is it sufficient enough when the rebuilder times and pins the pump to just slid it back in, match the gear teeth up and tighten her back down?? Thanks..........
Larry R is offline   Reply With Quote
Old 12-24-2004, 04:20 AM   #2 (permalink)
Registered User
 
Join Date: Dec 2004
Member # 40104
Posts: 18
I will give you the basics of it and you can decide if you want to do it or not but it would be better if you had a manual to go by.

Roll the engine to TDC and engage the pin, there is also a locknut on the pump that needs to be engaged to lock the pump. Disconnect all external injection lines, throttle linkages and wiring. Place matching marks on the timing cover and pump mounting flange. Lossen the mounting bolts, the two bottom ones are tough to get to, try using a 12mm "S" wrench or moon wrench. Remove the oil filler assembly from the front of the timing cover. Remove the gear to pumpshaft bolt. Using a sterring wheel puller and approipate metric bolts push the pump off of the gear and out the back of the timing cover. The gear stays in the the timing case and can not turn. The pump shaft is keyed and will only go onto the gear one way. Provided the locknut is engaged and the housing is marked it will go back in the same way it came out. If you get back a different pump it should be locked and will bolt back in ok but there won't be a timing mark so you may have to take it in to get timed.

For more info goto: http://www.dieseltruckresource.com/d...?s=&forumid=83
cLAYH is offline   Reply With Quote
Sponsored Links
Old 12-28-2004, 04:38 PM   #3 (permalink)
Knee Grow
 
jstarnes's Avatar
 
Join Date: Jul 2002
Member # 12575
Location: It puts the lotion on its skin OR it gets the hose
Posts: 1,774
Quote:
Originally Posted by cLAYH
The gear stays in the the timing case and can not turn. The pump shaft is keyed and will only go onto the gear one way.



you dont have to take the truck in to be timed

there is a "tick mark" on the timing cover and a "tick mark" on the injector pump by tick mark I meen a scribe or punch mark if you dont see one make one (on each)

eather mark the pump to the housing or mark the housing to the pump and re install to this mark

the hardest part is getting to the inner pump mount bolts BUY THE S WRENCH

and read up on advancing the timing while the pump is off

you will find out that you cannot advance the timing to much (adjustment will not alow) so basicly if the pump gos on and the pump top is closer to the engine top than before thats better, you cant go wrong as the key and sloted holes in the pump only alow for a small margen of error which is not enough to worry about


UNLIKE a 94-98.5 which does not have a key way
__________________
www.5280ecec.com
#5280ecec.com

Last edited by jstarnes; 12-28-2004 at 04:41 PM.
jstarnes is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 03:47 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.