Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-29-2010, 11:41 PM
Registered User
 
Join Date: Apr 2010
Posts: 2
W115 240d Injection pump re-installation timing question.

Hey, just got finished freshening up the internals on my 74 240d motor. I have the cam timing and crank timing set, and now need to reinstall the injection pump.

From my understanding the procedure goes as follows:

Turn motor to 24* BTDC (cyl 1)
align "marks" on the IP splined shaft and the IP body.
install IP
set exact pump timing using the drip/rotate method.

Here's where I have a question:

The pump "marks" will not stay in position. The pump turns back a few splines as soon as I let go of the splined shaft. I imagine this is due to the spring plate/cam plate/whatever the internal parts are called on the pump wanting to return to the "non-pumping" state. Seems to be the same kinda deal between other brand injection pumps I've installed before, so no real surprise there.

Anyhow, HOW do I keep the mark aligned? Or do I get them as close together as possible before the "return" motion happens and install like that? Or perhaps turn the motor back further to compensate for this?

Any thoughts or info would be much appreciated. Thanks!
Reply With Quote
  #2  
Old 04-30-2010, 11:40 AM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 23,550
I pretty much copied exactly what was said in the Manual. I would read the very last pargaraph "note" first as that explains why you are setting the crank at a different degree setting.
The driver is the splined gear on the Fuel Injectin Pump shaft.

From Mercedes Service Manual Engines OM615-617

Set crankshaft to the following values in compression stroke of first cylinder.
615.913 47 Degrees before TDC
615.912 45 degrees before TDC
616 45 Degrees before TDC.

Set injection pump to begin of delivery. For this purpose, keep turning the pump shaft until tooth gap on the driver and the marking on the injection pump are in alignment.
When applying slight pressure on the driver towards the left (opposite to the direction of rotation) the driver will jump back 2 teeth to basic cam circle under the influence of the pressure-loaded camshaft of the camshaft.The 2nd tooth should now be in alignment with the mark on the injection pump housing. Prior to installing the injection pump. Check ounce again whether crankshaft is at 47 degrees before compression TDC of engines 615.913. Or 45 degrees of 615.912 and 616.)

Note: The adjustment of the crankshaft to 47 degrees or 45 degrees before compression TDC is required because the driver has been taken back 2 Teeth.
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #3  
Old 04-30-2010, 12:09 PM
Registered User
 
Join Date: Apr 2010
Posts: 2
Awesome, that is exactly what I was looking for. I must have missed that part in the service manual, I'll have to look it over again and see if its in there and I went temporarily blind.

Thank you very much!
Reply With Quote
Reply

Bookmarks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 01:28 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page