1986 GMC Astro rebuild...questions

I had an L9000. Dont remember the exact year, basically only used it local and for the farm. Want to say it was about an 83. Maybe an 85. And it did not have the flag.

 

Oh good yes. Heck every truck I've ever had has an obnoxious buzzer. A simple low beep beep would suffice but no lets find the midst irritating buzzer we can.

 

This freightliner gives ford a good run for the money. Holy crap its obnoxious. A couple days ago one of the sleeper air bags developed a very slight leak, just enough for it to drop pressure over night. That #### buzzer is so loud that when i can hear it as I'm walking around the truck kicking the tires, checking lights and my securement. That's over the locomotive chug a chug cummins.

 

On the jack program: I am blowing cobwebs and trying to revive unused brain cells.
If you turn the lever CW does it not have a stop pin? Jack it and the cab goes up? Leave the plug out and keep adding fluid as needed. If it binds up it has a check valve stuck on the other side of the cylinder. It maybe reversed by turning the lever CCW to that stop pin and pump the jack. That can release the check ball sometimes, turn it CW and jack it up. Someone else posted about cleaning out these check valves on some older trucks.
If you get past the center point the cab will begin to continue forward on its own. If you flip the lever in the other direction it should stop. Then if you pump the jack it should bring the cab back.
Aside from worrying about the cab falling on you if it has air in the system you may not be able to stop it when it goes past the center point. If it is doing funny stuff tie it off some how to prevent it from falling on its nose.
Used to buy reman pumps from Mathews Equipment in Atlanta. If you can not find the GM jack most any brand can be adapted. An air jack can also be adapted and make cats meow.

 

That obnoxious low air buzzer was the Detroit motor,,,I know, here we go again,,

 

Don't blow too hard, BCK,
yeah, an air cylinder , like large car hoods have, would be better.