FLU419 SEE HMMH HME Owners group

[majkowskid]

Thanks for the help guys! Just ordered two belts online!

 

[glcaines]

I replaced the compressor head with a new one months ago and it appears to be working fine. However, you never know. I guess it is possible that the new head isn't working properly. Although the pressure regulator is holding the pressure at 106 PSI, it could also have an issue, as well as the alcohol injector. I need to do some serious troubleshooting to narrow the problem down.

Turns out the problem is with the unloader. I found a replacement on Ebay for $58.80 with free shipping. Hopefully I'll receive it soon because I have a project that needs the jackhammer.

 

[The FLU farm]

I had one give up on an HMMH.

Paid something like that, too. And they're easy to change. Forgot all about it until reading your post above.

 

[glcaines]

I had one give up on an HMMH.

Paid something like that, too. And they're easy to change. Forgot all about it until reading your post above.

Actually, the one that failed on mine was replaced by me several years ago. The model # I purchased for both is: WA9753034730A. I hope my new one holds up better. After removing the failed unloader, I noticed some corrosion in the steel fittings between the unloader and the crossover tube to the air tank. The crossover tube was previously replaced by me with a 316 SS 10 MM tube, so obviously no problem there. I like permanent solutions, and that 316 SS tubing was a permanent solution.

 

[glcaines]

I installed the new unloader. Took about one hour and everything works now. I did have to adjust the regulator to get the pressure up to 106 PSI. Maybe this one will last longer than the last replacement I did.

 

[glcaines]

Now that I have the air pressure issues resolved, I need to attack the problem that my alternator isn't charging and the tach, which is fed by the alternator, isn't working. Although the TM says I must tilt the cab to access the alternator, I seem to remember a post, either on SS or Benzworld, where someone was able to remove and replace the alternator on a FLU419 without tilting the cab.

 

[brandan34]

I seem to remember a post, either on SS or Benzworld, where someone was able to remove and replace the alternator on a FLU419 without tilting the cab.

I do not know the post, but I have done it. I installed a new alternator while cab was off, only to later find i wired the voltage breaker thing wrong. I had to remove the alternator to figure it out. I may have had the front of the cab lifted a few inches at the time, but I am fairly sure I did it while the cab was on all mounts. Either way no cab tilt was needed.

 

[The FLU farm]

Now that I have the air pressure issues resolved, I need to attack the problem that my alternator isn't charging and the tach, which is fed by the alternator, isn't working. Although the TM says I must tilt the cab to access the alternator, I seem to remember a post, either on SS or Benzworld, where someone was able to remove and replace the alternator on a FLU419 without tilting the cab.

Maybe try replacing the regulator first?

That's fully doable without lifting the cab. Not fun, but even I managed to get it done.

 

[glcaines]

Actually, I put a post on Benzworld about the problem. Several people responded and told me to check the charging warning light bulb. They said that voltage from the bulb goes to the alternator and is required to activate the alternator. My bulb checked out fine, but when I re-installed it, the alternator started charging and the tach started working. Apparently, there was a poor connection with the bulb. I had no idea that a faulty bulb could cause that problem. I am very happy that I didn't try to remove the alternator for repair.

 

[The FLU farm]

Oops. For some reason I thought you'd already checked the bulb.

I have one hanging loose from the wires under the dash on one vehicle, just for that purpose - to make the alternator kick on.

 

[Another Ahab]

Same problem a few days ago. Jam lever in the up pos then handyman jack did the trick for me. Once up set the things on the lift arms to hold it up.

My part is different than the one above, but does work. The belt that I copied I think I got from EI. Anyway just make sure the belt you get is a stronger kind.(not fractional horse power. Learned that the hard way.)

Amazon.com

That's a B****. But once you learn something that way, you'll never forget it!