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Hopping up the hopper with a hopper extension for Harman P-Series

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by Don2222, Apr 30, 2013.

  1. Don2222

    Don2222 Minister of Fire

    Joined:
    Feb 1, 2010
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    Loc:
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    Hello

    Time to install the hopper extension for the Harman P-61a. This hopper extension was not purchased thru a Harman Dealer and certainly may not be made by Harman.
    There were no holes drilled in the extension and no bolts or screws provided.

    My question is:
    Should nuts and bolts be used or are self tappers strong enough?
    I do like the nuts and bolts because I could tighten them down on the RTV and make a good air tight seal!

    Here is what I did.
    The original hopper lid has a piano hindge and was riveted into the top of the hopper. It took a 1/8" titanium drill bit to drill out the rivets. I placed paper towel in the bottom or the hopper to catch the rivets as they fell. Falling in pellets is like falling in quick sand! I drilled out the rivets in the hindge and removed the lid. Because of other rivets in in the top, the extension did not sit as flush as I liked. So I drilled out the rest of the rivets and the two back corner reinforcement plates fell out. I also banged down the back corners with a hammer to make them flatter.

    At this point I decided to use nuts and bolts. I found that 6-32 bolts would fit into the small holes the rivets came out of. Those bolts are tiny, so I got an 11/64" drill bit and reamed the holes so the heaftier 8/32" bolts would fit. I put the extension on the hopper making sure the latch tab was in front. Then using a felt pen I marked all the existing holes. Any holes I could not find could be measured and marked with the measure tape. I also decided not to use the holes in the two front corners because they would go thru the seam in the extension. So I measured an inch from the corner and made 2 new holes for the front.

    Continued

    Attached Files:

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  2. Don2222

    Don2222 Minister of Fire

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    Continued

    The lid was placed carefully on the top of the extension. Then opened slowly so the holes in the piano hindge could be carefully marked and drilled to 11/64" for the 8/32 bolts.
    After drilling all the holes, I painted the areas before assembly. When it is assembled there will be no exposed unpainted surface. The last hole was the large 1/2" hole for the latch. As I was drilling it, the two pop rivets just sheared off! LOL (but I was cussing when it all hit the floor!) So I drilled out those holes to 11/64" for two more 8/32" bolts. Then I put clear silicone on the top of the hopper and bolted the extension with the 8/32" bolts, nuts and c lock washers. After tightening with a wrench I wiped off the silicone oozing out the seam. Then I bolted on the piano hinge. Before attaching the hopper latch, I painted the top and sides of the extension with the Satin black so it all matched.

    The stove was Golden Fire Brown enamel and the hopper extension was a shiny black enamel. Therefore I painted over the brown with the very high temperature VHT flame proof flat black as a primer. Then I will paint the whole stove with Stove Bright Satin Black except the inside of the fire box and ash pan will remain the flat black!

    Actually the way it is bolted in, the bolts can be removed and the extension can be remove. The the lid can be bolted back to the stove using the 8/32" bolts into the original holes that were reamed out larger for these bolts!

    Is this a good way to do it since no instructions were provided?

    Attached Files:

  3. Harman man

    Harman man New Member

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    lQQks like a nice job to me...anything to help extend time between fillings is welcome..IMHO...How much more pellets can you put in and how many did it hold before?
    iceguy4 likes this.
  4. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    Loc:
    Averill Park, NY, on Burden Lake II...
    IIRC, the Harman Hopper Extension adds another 60lbs to the capacity. I wanna do it, but the gf thinks it looks like a big toilet with the extension added...
    gbreda and Delta-T like this.
  5. Delta-T

    Delta-T Minister of Fire

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    my co-worker has the Harman Extension on his PC45....we got him a toilet flush handle and mounted it to the extension with a magnet...classy.
    gbreda and DAKSY like this.
  6. mralias

    mralias Minister of Fire

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    Hmmmm....is a pellet stove forbidden from being put in a bathroom?;hm It would certainly make it a warm morning constitutional.!!!
  7. Don2222

    Don2222 Minister of Fire

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    Tell your gf instead of filling it so often you will spend the time with her. :)
  8. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    Loc:
    Averill Park, NY, on Burden Lake II...
    The problem is that SHE fills it & a 40 lb bag is a tad much for her to get over her head... She's vertically challenged...'Course we could always use a smaller bucket to fill with...I'm working on her...we'll get there...
  9. Don2222

    Don2222 Minister of Fire

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    Hi Daksy

    I have seen conflicting info about how many lbs of pellets the hopper and extension is:
    Here is one from http://woodheatsupply.com/harman/pellet.htm

    This coinsides with what you said. The original hopper is 72lbs and then 60 lbs for the 22.6" extension would make it 132 lbs

    My off brand is 12" high x 22-3/8" wide x 8" deep
    The 12" high is key because the other dimensions have to match the stove!

    Optional Features:
    24 K Gold Door
    24 K Gold Sunrise with 24 K Gold Ash Lip
    Gold Air Grill
    Ceramic Log Set
    Custom Colors (Satin Black is Standard)
    Outside Air Kit
    Hopper Extension Increases Capacity to 132 Pounds
    Side Heat Shields (For Close Installations)
    Thermostat
    Decorative Tiles
    Battery Backup System

    HOWEVER
    The harman stoves web site states that the P61a extension only adds 50 lbs capacity
    See
    http://www.harmanstoves.com/Products/P61A-Pellet-Stove.aspx?page=Accessories
    • Trim kit in gold, stainless steel and bright nickel
    • Louver trim in gold, brushed stainless or bright nickel
    • Hopper extension kit, adding an additional 50 lbs capacity
    • Side heat shields for close installations
    • Ceramic logs
    • 12" x 6" brushed stainless steel plate (deer)
    • 12" x 6" slate tiles in a variety of designs
    • Outside air kit
    • Direct vent wall pass-through
    • Battery back-up (Model 512H)
  10. gbreda

    gbreda Minister of Fire

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    This is where the beast residing in the basement comes in. Who cares what it looks like.

    This may be an option for me prior to next season. 130 or so lbs of fuel would be real nice.
  11. Don2222

    Don2222 Minister of Fire

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    It make a difference of adding pellets only once a day instead of twice a day! That is a big time saver in the dead of winter

    I got this aftermarket brand for $95 instead of the OEM for $250.00 That helps too!
    Here is the OEM one
    http://www.stove-parts-unlimited.com/Harman_22_6_Hopper_Extension_Kit_p/1-00-09636.htm
  12. iceguy4

    iceguy4 Minister of Fire

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    filling stove 2 times a day is a PITA....just being able to fall asleep on the couch and not worrying bout the stove is priceless for me:)
  13. Don2222

    Don2222 Minister of Fire

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    X2 - That is what I am talking about!
  14. Defiant

    Defiant Vermont Castings Geek

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    You need a pellet princess, she will also cook you dinner. :cool: I'm still looking;)
    iceguy4 and Lousyweather like this.
  15. Lousyweather

    Lousyweather Guest

    yea....here's the sexist part of this....neighbor's wife's mom, a Polish national, stays with them from time to time. She is "old school" and plants and tends the garden, raises the chickens, does the wash, kills the chickens, butchers them, and cooks them......ah, the old days!
  16. rayttt

    rayttt Feeling the Heat

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    where did you get a aftermarket brand for 95 from?

    Im not paying over 250 dollars for one..not worth half that.
  17. Don2222

    Don2222 Minister of Fire

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    Maine Craigslist - there is a student that makes them and sells them. :)
  18. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    Been lookin Don, & can't seem to find any. He must sell out of them quickly...
  19. rayttt

    rayttt Feeling the Heat

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    Thanks..

    Haven't found anything so far.
  20. rayttt

    rayttt Feeling the Heat

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  21. RCCARPS

    RCCARPS New Member

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  22. Sniz

    Sniz Member

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    ^ thats right next to my office...........hmmmmm
  23. bbfarm

    bbfarm Minister of Fire

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    Wish I could find one for our st criox. So many days I have to rush home from work to fill

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