Progressive EMS - Bolts Missing, Loose Parts, YEARLY Maintenance Item

[Galway Girl]

In a recent facebook post the Progressive EMS that is located under the rear dinette seat came into question.  The poster had been concerned about the other posts about the transfer switch and decided to look at the wiring in the EMS Unit in the same dinette seat bay.

Below is one of the pictures he posted showing his burnt wiring (in the white circle).
He also posted a videos showing the main power switching board completely loose as the bolts holding it in place had fallen off.

 

Since I already check the connections on the transfer switch each year, I decided I would also check my Progressive EMS unit as well.
Good thing I did as the bolts had fallen out just as in the Facebook Posting.

 

EMS and Transfer Switch Locations:  Under Rear Dinette Seat (next to Pantry).

Looking down into the under dinette seat you'll see the Progressive EMS is held onto a vertical mounting board near the aisle.  It's held in place by 4 - #2 phillips screws into the board.
The Progressive transfer switch is across from the EMS on the forward wheel hump (for units with front and side street power inlet option.) 

 

Safety FIRST- Make sure you're not connected to street power and that your Inverter is OFF.  To be really safe you may want to shut off batteries as well.

1) I placed a towel under the EMS unit work area because I've lost more than one screw down the abyss.
2) Removed the 4 #2 phillips mounting screws from the corners up the unit.
(Note - to access the top front screw you likely will need to detach the cable that connects to the remote display...it's a network clip connection.)
3) Tilted unit so it was facing up.
4) Removed the 6 - #1 phillips screws holding on the lid. 
5) Inspected the wires and none were scorched. 
6) Wiggled the main connection board and it was very loose...one of the two nuts holding it onto the 2 mounting bolts was loose, lying in the bottom of the case.
7) Checked for bolts (thread through back of case) Luckily the bolt was still attached to the case.
 (They are phillips head countersunk bolts. Which after working on them I taped them in place from the outside.)
8  Reconnected the bolts to the nut putting on blue thread locker.  
9) Checked tightness of all the lead screws and the bolts on the 3 ground lugs (green). See PIX below:

10) Put lid on and then re-attached to mounting board and re-attached remote display network wire.

Tested with shore power and all was well

Tricky Bits:  Getting my hands into the bolt area was a trick.  
I got a proper size nut driver and put a bit of tape inside to hold the nut flat in place.
I carefully threaded the nut driver down to the bolt which had blue thread locker already drizzled in place.

 

Progressive Transfer Switch inner connections above:

I've submitted a ticket to Oliver,  and a letter to Progressive Industries and requested a service note about yearly maintenance.


Here are the wiring diagrams from the PD Manual for this item:

Craig - Hull 505 - Galway Girl

Edited July 24 by Galway Girl
Added PD wiring diagrams.

[BoondockingAirstream]

Since we are close to build numbers... I took some more photographs before the Trailer Service Tech checks out my no Braking situation,

I am hull #448 probably with all the options you may have in your #505.  My other appliances and systems seem to work just fine, but my wire colors seem to be different.  I do not know if Braking Ground in on the Buss Bar (?) if that is what it is called.  I was expecting the same color wires.  Although if grounds... maybe wire diameters are the important things to notice.

There is a sticker of an Inspection sign off along the floor near the other wiring.  Brakes?  I may remove this sticker to find out what was... inspected.  Other than the Electric Brakes connected to the Tow Vehicle, everything else seems to be working.

I am forced to learn more about Electric Brakes in an Oliver, and now, maybe others can compare internal wiring that is visible,  An Oliver in Nevada is like finding Trout and Water Falls in our Deserts.  These wires are under the outside in the rear seating at the table.  

Manuals tell you HOW THINGS WORK... but do not have WHAT TO DO IF THEY DO NOT.

I also have the four 6 Volt Batteries with Solar Panels. Work just fine.

I could be organizing the garage, but that has been done.  Maybe trim ornamental palms and flowering bushes, but that has been done.  So... this is an education that I need.  Not wanted... but curiosity is a good thing if it is to learn and understand more about my Oliver.

Learning a lot about the 7 Plug Trailer Plug... 

 

Edited 6 hours ago by BoondockingAirstream