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Forum: Diesel Discussion

05-07-2012, 12:18 PM

Replies: 22

87 300SDL --- weird, erractic AC issues

Views: 6,920

Posted By ah-kay

I looked at the FSM manual for 300SDL pressure...

I looked at the FSM manual for 300SDL pressure switches at rec/dryer:

Freon presence switch - Off 2.0 bar On 2.6 bar
Aux fan switch - Off 15.0 bar, On 20.0 bar

Hope this help.

Forum: Diesel Discussion

05-05-2012, 01:22 AM

Replies: 22

87 300SDL --- weird, erractic AC issues

Views: 6,920

Posted By ah-kay

The switch at the rec/dryer is a pressure switch...

The switch at the rec/dryer is a pressure switch for the SDL. There are 2 switches in the r/d. One low pressure to indicate freon is present and up to pressure. The other one is high pressure switch...

Forum: Diesel Discussion

05-04-2012, 04:52 PM

Replies: 22

87 300SDL --- weird, erractic AC issues

Views: 6,920

Posted By ah-kay

What do you mean by direct contact?? The p/n...

What do you mean by direct contact?? The p/n switch is the thermostatic switch on top of the cylinder head. It will NOT be in contact with any R134A or R12, they are poles apart.

The slow speed of...

Forum: Diesel Discussion

05-02-2012, 11:29 AM

Replies: 22

87 300SDL --- weird, erractic AC issues

Views: 6,920

Posted By ah-kay

Good job. I do not realize that you have a 19i91...

Good job. I do not realize that you have a 19i91 SD parts car. The Kilma should be compatible. So the time I spent last night to hack the Kilma circuit and PM'ed you was all in vain.:(

The problem...

Forum: Diesel Discussion

05-01-2012, 01:22 PM

Replies: 22

87 300SDL --- weird, erractic AC issues

Views: 6,920

Posted By ah-kay

Problem for symptom #1 is Kilma relay. It...

Problem for symptom #1 is Kilma relay. It happened to one of my SDL, A/C cut off after a while then return after turning off car. I hacked the relay to only monitor the freon switch and everything is...

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