richyung601

Hello my CH 613 a/c works blow cold when I charge the system then it started to blow warm air so I looked around and heard a leak around the expansion valve that's sits near the firewall my question here is it a pain to change that valve. Someone told me that I would have to take the dash out to get to it but as I looked closer I don't think so please help thanks. I took a few pics

ok the draining part which hose should i pull to drain is it the hose to the reservoir? thanks

thanks for the help I have only water in the system now since its cold Im gonna put coolant in the system. Is it ok to just mix the coolant with the water already in the system by just pouring that in with it or should I flush the water out the system?

Hello Everyone I wanted to find out what type of coolant do I have to use in my system. I have a Mack e7 427 engine thanks for the help.

Hello Everyone I wanted to find out what type of coolant do I have to use in my system. I have a Mack e7 427 engine thanks for the help.

No they stay on even with the key off and switch in off position. The park brake pulled out and fuse in only way to turn them off is pull fuse out.

No they stay on even with the key off and switch in off position. The park brake pulled out and fuse in only way to turn them off is pull fuse out.

Ok thanks so what do you recommend to get the lights to work when I push the button in on dash to turn them on? Is there a fuse for the lights if so what # fuse?

Hello Staxx thanks for all the help the truck is back running great does not cut off since the new ECM has be programmed and out in. Now I have a situation with my head light since the new ECM is in all the clearance lights comes on but my headlights does not come on. They will work when you press the flash to pass button so I know the lights work. I put a fuse in fuse 16 spot #16 the lights comes on but when I turn all the lights off with switch the head lights stays on. What could cause this?

This the same sensor that screws in at the fly wheel?

Thanks for the help where is the tach sensor located? Thank

Ok thanks very much!!!

Thanks for all the help staxx!!! I have something else I noticed when I was driving the truck with the original ECM the rpm would studder around 1400 rpm do you think since the ECM is bad it will cause that? Thanks

thanks for your reply I want to make sure I'm understanding you correctly when you say module you mean the ECM correct?

my tech installed actually a certified Mack tech works at Mack Dealer. I've ordered the module hopefully that does the job because the other module worked