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  #1  
Old 03-05-2008, 09:34 PM
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Join Date: Mar 2008
Location: Toronto, Canada
Posts: 171
Newbie needing help again please

Good evening all!

Wondering if someone could help me with a couple issues.

1. Could someone please tell me what the proper belt routing is for my '78 240D with A/C? The reason I ask is because the P/S pump pulley doesn't seem to line up properly to any other pulley (too forward.)

2. I've tried to play around with my dimmer rheostat and still no cluster lights, but there is light only at my A/C dial. Is the rheostat still a very probable cause?

3. Does the turn signal switch have a detent to hold the lever in position? I have to hold the lever in position.

Thanks again to all who reply.
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  #2  
Old 03-05-2008, 11:23 PM
winmutt's Avatar
85 300D 4spd+tow+h4
 
Join Date: Apr 2006
Location: Atl Gawga
Posts: 9,305
Quote:
Originally Posted by 78240D View Post
Good evening all!

Wondering if someone could help me with a couple issues.

1. Could someone please tell me what the proper belt routing is for my '78 240D with A/C? The reason I ask is because the P/S pump pulley doesn't seem to line up properly to any other pulley (too forward.)

2. I've tried to play around with my dimmer rheostat and still no cluster lights, but there is light only at my A/C dial. Is the rheostat still a very probable cause?

3. Does the turn signal switch have a detent to hold the lever in position? I have to hold the lever in position.

Thanks again to all who reply.
1. PS CRANK - AC CRANK - ALT Fan Crank I believe. 3 Different belts.
2. Remove rheostat and hot wire. Never heard anyone complaining about it being to bright.
3. Yes it should operate like and normal switch. You can find a replacement at any junkyard or possibly here.
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  #3  
Old 03-05-2008, 11:46 PM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 14,861
For the lights, does messing with the rheostat change the brightness of the temp dial? If so...then the rest of the bulbs are possibly burned out. Because the temp wheel light is powered off the rheostat like the rest of them. Lots of dead bulbs is common....our 300D has every single switch/climate light out. Only the window switches and instruments still have light. I know its the bulbs because I physically checked/tested them, and they're all dead.
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-diesel is not just a fuel, its a way of life-
'89 420SEL 168k - mine (OC-170,000)
'93 190D 2.2 - 223k - mine (OC-222,700)
'01 E320 Wagon - 149k - mine (OC-154,000)
'05 C240 4matic Wagon - 153k - wifes (OC-154,500)
'01 E320 - 162k - Dad's (OC-163,500)
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  #4  
Old 03-06-2008, 12:41 AM
300SDog's Avatar
gimme a low-tech 240D
 
Join Date: Jan 2003
Location: central ky
Posts: 3,602
Alternator water pump belt is closest to engine, furthest one back. Next is the PS pump belt, 3 x 13mm bolts for loosening then one captive 13mm bolt to adjust. A/C belt's in front, cut & discard unless your car is 1 in 7 where A/C actually works.

Something else worth adjusting is hood release cable at catch release under the hood. Easily done to shorten the pull as cable gets stretched over 30 yrs. And can prevent disfunction at lever inside the car.

Meanwhile keep fiddling with dimmer switch and might get lucky, never seen one 100% fully functional.
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  #5  
Old 03-08-2008, 01:49 AM
yellowbenz's Avatar
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Join Date: Jun 2005
Location: Columbia, Missouri
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Quote:
Originally Posted by 78240D View Post
Good evening all!


3. Does the turn signal switch have a detent to hold the lever in position? I have to hold the lever in position.

Thanks again to all who reply.

Since I've figured out this whole photobucket thing, Here is how I fixed the turn signal.

Easy to remove the switch. Diesel giant has great pics and instructions for this on his site. Use a dremel tool or file to deepen the slot for the pins that slide into postition and lock the turn signal stalk until it cancels. I think overzealous removal of metal/deepening of slot may negate the self canceling feature but I'm not sure about this. Just go slow and test as you go. When it catches, stop. Be careful with the dremel tool if you use it (eye protection etc. ) Might be better to use a file.

Hope this helps. This site has been so valuable to so many. I'm humbled by the knowledge shared by people here. If this is the wrong way to fix this I'm certain others will correct.



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  #6  
Old 03-08-2008, 04:44 AM
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Join Date: Mar 2008
Location: Toronto, Canada
Posts: 171
Thanks for the help everyone, and awesome pic Kevin! I really can't wait to get my car back on the road, where it belongs! The v-belt routing still doesn't make sense to me, but I'll see when I get my new belts. From what I know, the crank pulley has two grooves. One for W/P and ALT together. Next groove for power steering. So how does the A/C compressor get driven??
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