DVC 500 Feeder Fork Has Play in It

A Coal stoker furnace or stove controls most operations including automatically feeding the coal. They are quite similar to any conventional oil and gas units and easily operated for extended periods of time. They commonly use rice coal but may use larger sizes like buckwheat. They can be used as primary heat, supplementary heat or have a dual set up with your existing oil/gas furnace.
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Matt K
New Member
Posts: 1
Joined: Mon. Jan. 20, 2014 10:11 pm
Stoker Coal Boiler: Harmen DVC 500
Location: Port Crane NY

Post Thu. Jan. 23, 2014 11:08 pm

I have been having an issue with my stove the last few weeks. I can not get it to burn faster that about a number two flame. I changed the ESP sensor at the suggestion of the dealer. That did not help. yesterday I noticed that the fork has a lot of play in it so it is not moving as much coal as it should. Is there and adjustment to tighten it up or do I need to take the stove apart to replace parts. It is running below zero so I would like to put it off a little while.

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McGiever
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Posts: 6002
Joined: Sun. May. 02, 2010 11:26 pm
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Coal Size/Type: PEA / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek
Location: Junction of PA-OH-WV

Post Fri. Jan. 24, 2014 12:32 am

If the space gap is same as Mag Stoker it should be 1-3/4" inside.
But if it stretched wider you will need to solve that or it will just stretch again.
Usually it is from binding the pusher block.
SLOW AND STEADY WINS THE RACE

th77
Member
Posts: 27
Joined: Tue. Jul. 24, 2012 10:40 am
Hot Air Coal Stoker Stove: Harman Dvc-500
Coal Size/Type: rice
Other Heating: wayne oil furnance
Stove/Furnace Make: harman
Stove/Furnace Model: dvc-500
Location: Newfounland,Pa

Post Fri. Jan. 24, 2014 10:36 am

I had the same problem,make sure there isn't any debris or large coal stuck in front of the pusher block. Also you might have to squeeze the fork to approx. 1 3/4" with a clamp. Squeeze at the middle of the fork not the end.


th77
Member
Posts: 27
Joined: Tue. Jul. 24, 2012 10:40 am
Hot Air Coal Stoker Stove: Harman Dvc-500
Coal Size/Type: rice
Other Heating: wayne oil furnance
Stove/Furnace Make: harman
Stove/Furnace Model: dvc-500
Location: Newfounland,Pa

Post Fri. Jan. 24, 2014 10:53 am

Make sure you clean the stove and exhaust my DVC 500 does not burn well when too much fly ash builds up.

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Horace
Member
Posts: 496
Joined: Thu. Sep. 18, 2008 12:15 pm
Hot Air Coal Stoker Stove: Harman ST8-VF8 / Frankenstove
Location: Central PA

Post Fri. Jan. 24, 2014 9:13 pm

You should be able to move the pusher block back and forth with your hand. At least as far as the fork will let you. If you can't you might want to consider pulling the block out and cleaning underneath it. As other before me have stated, if the block is binding, it will spread the fork.

Harman used to use a closed loop instead of a fork, I'm wondering why they abandoned it.
The best weapon and tool one can ever possess is patience.

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