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-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-29-2011, 09:49 PM
Registered User
 
Join Date: Mar 2005
Location: Yountville, CA
Posts: 1,175
'75 w115 300D without Primer Pump!

So apparently my primer pump was removed and I need to replace all filters on this neglected beast - a good prime procedure in lieu of a primer pump? This car has not run in awhile so it needs a full service, valve adjustment, etc. - best way to prime minus a prime pump? Thanks!

Reply With Quote
  #2  
Old 04-29-2011, 10:24 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 35,055
On some of the older models the Fuel Filter was not a Spin-on type Fuel Filter.

I have seen pictures where bolted onto that type of Filter Housing was a Hand Primer; sort of a large Button that you pushed.

The only think I can think without a Hand Primer that would help is if you filled the Filter Housing with clean Diesel Fuel.

Also, while I do not know if your Fuel Injection Pump has one but the older Bosch Fuel Injection pumps used to have one or 2 Air Bleed Screws on the Fuel Injection Pump Housing so that when you cranked the Engine the Air Quickly bled out of the Screw.
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #3  
Old 04-30-2011, 12:13 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
what I do is unhook the return line, cap off the line going to the tank, and leave open the line leaving the filter... then hook a shop vac blowing into the fuel filler neck.
a few seconds later, fuel flows through the filters, and out the return hose... then hook it back to the return line, and voila! primed.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #4  
Old 04-30-2011, 03:58 AM
Registered User
 
Join Date: Mar 2005
Location: Yountville, CA
Posts: 1,175
Quote:
Originally Posted by vstech View Post
what I do is unhook the return line, cap off the line going to the tank, and leave open the line leaving the filter... then hook a shop vac blowing into the fuel filler neck.
a few seconds later, fuel flows through the filters, and out the return hose... then hook it back to the return line, and voila! primed.

I like it! I will give it a shot -thanks vstech!
Reply With Quote
  #5  
Old 04-30-2011, 05:16 AM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Quote:
Originally Posted by vstech View Post
what I do is unhook the return line, cap off the line going to the tank, and leave open the line leaving the filter... then hook a shop vac blowing into the fuel filler neck.
a few seconds later, fuel flows through the filters, and out the return hose... then hook it back to the return line, and voila! primed.
That is nice - have you tried blocking off the tank vent to get an even quicker response or isn't that necessary?
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
Reply With Quote
  #6  
Old 04-30-2011, 05:17 AM
1980sd's Avatar
Registered User
 
Join Date: Apr 2011
Location: Elavil, Ga.
Posts: 910
Quote:
Originally Posted by vstech View Post
what I do is unhook the return line, cap off the line going to the tank, and leave open the line leaving the filter... then hook a shop vac blowing into the fuel filler neck.
a few seconds later, fuel flows through the filters, and out the return hose... then hook it back to the return line, and voila! primed.
I'd probably just fill my tank with sawdust...
__________________
My occupational hazard bein'
my occupation's just not around...
1980 300SD
1980 300SD
Reply With Quote
  #7  
Old 04-30-2011, 05:29 AM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Quote:
Originally Posted by 1980sd View Post
I'd probably just fill my tank with sawdust...
Ha! In the cold it might even work as an anti gelling agent I think you're on to something there...
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
Reply With Quote
  #8  
Old 04-30-2011, 08:50 PM
Palangi's Avatar
L' Résistance
 
Join Date: Dec 2000
Location: Republique de Banana
Posts: 3,496
See that round disk lookin' thingy next to the fuel filter??

That's your primer pump. The 115 300D had a different style than all the others.
__________________
Palangi

2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg



TRUMP .......... WHITEHOUSE
HILLARY .........JAILHOUSE
BERNIE .......... NUTHOUSE
0BAMA .......... OUTHOUSE
Reply With Quote
  #9  
Old 05-01-2011, 12:50 AM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 35,055
Some one posted some pics of the Hand Primer in the other thread he started.
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #10  
Old 05-01-2011, 12:58 AM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
You could also put a Mity Vac on the cigar hose return line and suck fuel thru the system.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #11  
Old 05-01-2011, 01:17 AM
Registered User
 
Join Date: Mar 2005
Location: Yountville, CA
Posts: 1,175
Quote:
Originally Posted by kerry View Post
You could also put a Mity Vac on the cigar hose return line and suck fuel thru the system.
As always Kerry, you are a man of impeccable reasoning! Easy, fast solution, thanks!
Reply With Quote
  #12  
Old 05-01-2011, 08:53 AM
funola's Avatar
Registered User
 
Join Date: May 2005
Location: NYC
Posts: 8,241
Quote:
Originally Posted by vstech View Post
what I do is unhook the return line, cap off the line going to the tank, and leave open the line leaving the filter... then hook a shop vac blowing into the fuel filler neck.
a few seconds later, fuel flows through the filters, and out the return hose... then hook it back to the return line, and voila! primed.
The problem I see with this practice is that the air coming out of the shop vac may not be clean air. Safer to use an air compressor on low pressure or a bicycle pump.
__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked
Reply With Quote
  #13  
Old 05-01-2011, 12:13 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
Quote:
Originally Posted by funola View Post
The problem I see with this practice is that the air coming out of the shop vac may not be clean air. Safer to use an air compressor on low pressure or a bicycle pump.
this is a good point. if your shop vac has dust etc in it, you'd have to clean it first. but the filter in the shop vac should catch any large particles...
most shop vacs have a decent filter on the output air joint... Mine is HEPA rated... I'm good with that for my fuel tank.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #14  
Old 05-01-2011, 01:49 PM
Registered User
 
Join Date: Mar 2005
Location: Yountville, CA
Posts: 1,175
Quote:
Originally Posted by Palangi View Post
See that round disk lookin' thingy next to the fuel filter??

That's your primer pump. The 115 300D had a different style than all the others.
yea, which is why I posted here - no pump, it was removed apparently =

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 01:15 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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