Pump adjustment OM603A - Printable Version

Pump adjustment OM603A - Printable Version

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Pump adjustment OM603A - Einar - 08-17-2009

Hi.
I have a `91 300 TD Turbo, the diesel pump was turned up before I bought it.
Want to adjust it back to original, so I can know how it is adjusted.
Does anyone know what turbo pressure to be on original, KKK-turbo?
Any tips for this adjustment back to original?

Thanks for all replyes.

RE: Pump adjustment OM603A - ForcedInduction - 08-17-2009

(08-17-2009, 04:41 PM)Einar `91 300 TD Turbo

There is no such car. I think you mean you have a 1991 300SD

Quote:Does anyone know what turbo pressure to be on original, KKK-turbo?

12psi is the factory setting.

Quote:Any tips for this adjustment back to original?

Without knowing exactly what was done to the pump its impossible to get it back exactly stock (Thats why I document every adjustment I do to my pump). At best, everyone would be guessing.

Unless you find out what was done, the only way to get it to stock is to remove the pump and have an injection shop do a bench calibration.

RE: Pump adjustment OM603A - Einar - 08-18-2009

(08-17-2009, 09:43 PM)ForcedInduction
(08-17-2009, 04:41 PM)Einar `91 300 TD Turbo
There is no such car. I think you mean you have a 1991 300SD

Quote:Does anyone know what turbo pressure to be on original, KKK-turbo?
12psi is the factory setting.

Quote:Any tips for this adjustment back to original?
Without knowing exactly what was done to the pump its impossible to get it back exactly stock (Thats why I document every adjustment I do to my pump). At best, everyone would be guessing.

Unless you find out what was done, the only way to get it to stock is to remove the pump and have an injection shop do a bench calibration.

Data card VIN WDB1241931F184501
Model 300 TD TURBODIESEL
Chassis 1241931F184501
Engine 603960 12 033220
Transmission 722357 03 545868
Order 0 0 247 02789
Lights BOSCH
Wiper BOSCH
Delivery date 29.04.91
Dealer Reutlingen branch (247)
Interior cloth black (061)
Paint
481 bornite (blackberry) metallic (с 01.01.1990 по 31.12.1996)
Options
211 automatic limited slip differential (ASD) (с 01.07.1984)
rear axle with automatic limited slip differential (ASD)

260 elimination of model designation on rear lid (с 01.05.1968)

261 elimination of model designation V12 (с 01.11.1973)

281 trunk set, (280 SL)
steering wheel with sports design (390 mm dia.) and gearshift lever in leather trim (с 01.05.1990)
steering wheel (390 mm) with sports design (с 01.03.1989)

291 airbag for front passenger
airbag for driver and front passenger (с 01.07.1987 по 30.09.1993)
airbag for driver and front passenger (if driver airbag standard - then only for passenger)

300 storage box in front tray (с 01.05.1988)

412 electric sliding roof with tilting device (с 01.07.1983)

243 - sports seats, front and rear (from 01.12.1986) Ettermontert

537 mechanically operated antenna and front loudspeaker - without radio set (с 01.10.1989)

541 double roller blind used as luggage and passenger guard (с 01.01.1980)

553 trailer coupling and anti-theft warning system (с 01.11.1978)

586 Behr air conditioner, and electric window lifters (front and rear doors) (с 01.04.1970)

591 heat-insulating glass, all-around, heated rear window pane, (single-sheet safety glass), Germany
green heat-insulating glass all round, heated rear window, single pane safety glass - Germany (с 01.01.1972)

653 sports chassis with 8-hole light alloy rims (с 01.01.1990)

724 cargo anchorage (с 01.04.1979)

I believe this is a 1991 Mercedes-Benz E 300 TD Turbo Sportline

This is the pump, does anybody have a good explanation of the adjustment of the pump, I believe a screw right underneath the alda-valve(pointing backwards) have been turned up.
If I adjust the boost back to original, and adjust the pump to almost no smoke I would think it would be close to original, now it have a diesel-blue smoke on idle for a while, very easy to start cold and not so easy hot, so I want it closer to original, then I can know what the adjustments on the pump and boost is.
[Image: 007.jpg]

The engine is overhauled for 1000 miles ago, new head, piston rings, rod bearings and head gasket, I had 2 broken secondary compression rings before that.

RE: Pump adjustment OM603A - ForcedInduction - 08-18-2009

Norway, that explains a lot. The only year that model was sold in the USA was 1987.

Adjusting the ALDA is easy, CW to reduce fuel, CCW to increase. It does not alter maximum fuel or power, it changes the fuel delivery curve. There is no set point, adjust it until no black smoke is visible when you floor the throttle from a standstill.

RE: Pump adjustment OM603A - Einar - 08-18-2009

(08-18-2009, 02:45 AM)ForcedInduction Norway, that explains a lot. The only year that model was sold in the USA was 1987.

Adjusting the ALDA is easy, CW to reduce fuel, CCW to increase. It does not alter maximum fuel or power, it changes the fuel delivery curve. There is no set point, adjust it until no black smoke is visible when you floor the throttle from a standstill.

Sorry I forgot to mention that, it was my intention to do that, but this messy head I have.... Only `87 you had them.

I have a wcrew who is pointing backward right underneath tha ALDA, I can see it`s been adjusted, what does screw do.

Thanks for the answers so long :-)

RE: Pump adjustment OM603A - ForcedInduction - 08-18-2009

The screw is for the fine idle adjustment.

RE: Pump adjustment OM603A - tomnik - 08-18-2009

Hi,

besides ALDA check also the lift pump for low pressure.
This was the reason for idle smoke on my 300 TDT.
I could hear the difference when I operated the original and the replacement lift pump by hand (taken off the IP pressing the roller).

Tom

RE: Pump adjustment OM603A - Einar - 08-31-2009

Someone who have a good explanation/picture with all the adjustments?

RE: Pump adjustment OM603A - ForcedInduction - 08-31-2009

Look at the sticky threads at the top of the / Tuning / Engine forum.