240 DL 1990, Belt Tension Issue

HolyHealy · Post by **HolyHealy** » 11 Feb 2010, 14:29

Hi guys,

I'm new here but could use some help....

I'm in the process of replacing my belts, a/c, p/s and alternator, but cant figure out for the life of me how to untension these damn belts. Any advice or pointers? Pics/Diagrams would be even better!

Thanks in advance.

Post by **jblackburn** » 11 Feb 2010, 14:31

If you're just trying to remove them, just snipping them with a pair of garden cutters works quite well. They're much easier to get on than off (which is a good thing).

HolyHealy · Post by **HolyHealy** » 11 Feb 2010, 14:34

haha, im trying to save one actually, and i need to replace them as well, which i doubt can be done while theres tension? if im wrong feel free to tell me so

EDIT:reading is a good thing, if i can replace them easier than taking them off, is there need to adjust the tension. i suppose i could go buy the extra one and just cut em off if i can slip the other ones on no problem.

Post by **billofdurham** » 11 Feb 2010, 15:43

Using the diagram in the attached as a reference:
Slacken, but don't take out, bolt #15.
Do the same with bolt #7.
The alternator should now move to allow you to get the belts off. If it doesn't back off bolt #18 until the alternator moves far enough to get them off.

It is advisable to use two new belts as the older one will be stretched and you may not get the correct tension.

To tension the new belts pull or push the alternator until the belts are tight. Tighten bolts #15 & #7 whilst holding the tension. Check the tension at the mid point of the longest belt run with moderate thumb pressure. The belt should deflect between 0.2" and 0.4". If you need more tension turn in bolt #18 until it is tight, slightly slacken bolt #15 and turn #18 until you get the correct tension. Retighten #15.

240 alternator adjustment.pdf: (672.79 KiB) Downloaded 2748 times

Bill.

HolyHealy · Post by **HolyHealy** » 11 Feb 2010, 16:34

hey thanks for that. ive managed to get a new belt on from the crankshaft to my alternator/fan. that being said, the belt that is giving me hell is the a/c-crankshaft belt. ive loosened everything like i did on the p/s unit and alternator to get some slack. except with the a/c unit, after loosening the bolts i think i need to, still, it wont budge.

any ideas?

Post by **cattledog** » 11 Feb 2010, 16:55

Did you loosen two pinch bolts?
There's one mirroring the front one, on the back.

HolyHealy · Post by **HolyHealy** » 11 Feb 2010, 17:09

are those on the bottom of the a/c unit? cause if so i loosened the front one, however i didnt loosen the back(socket cant fit back there). I bet that that was it, but wasnt certain enough to try and figure out how to loosen it.

that and its covered with assorted fluids

Post by **cattledog** » 11 Feb 2010, 18:27

No they're on the top.

HolyHealy · Post by **HolyHealy** » 11 Feb 2010, 20:17

haha! well....rigth after my last reply i assumed thats what you were talking about, so i loosened w/e those two mirrored bolts were at the bottom and eureka. it created enough wiggle to slip the belt on.

thanks for the input guys, the baby is alive and purrin again.

Post by **billofdurham** » 12 Feb 2010, 11:32

Thank you for the update.

Bill.