16 year old 422

[FordMan59]

They very seldom need replacing as they are not subjected to moisture. But if you have to it is not a big deal 20 min. max.

Thanks for that information. Since mine aren't making any abnormal noises and they seldom go bad I'll just skip them for now. I was just thinking while I was working on it and since the bearings are cheap I might go ahead and replace them.

[Bryand]

They very seldom need replacing as they are not subjected to moisture. But if you have to it is not a big deal 20 min. max.

[FordMan59]

If the bearings in the circulation fan aren't in the habit of needing changing I'll just let them go for now and hope for the best. They are still running quietly, so I guess it goes back to the old saying "if it ain't broke don't fix it".

[Bryand]

40's and 41's circulation fan has the same bearings in it as in the combustion motor. Had to re-do several after a flood several years ago.

[HayZee518]

nobody I know ever had to rebuild the circulation fan motor. but if you take it apart look in the seal part. there should be a number - ndk or something like it. the number is inter changeable with other bearings [timken, sdf, fafnir, etc]

[FordMan59]

I took the combustion fan motor out of my 422 tonight and confirmed that there's a rubber plug to remove to oil the bushing in the combustion motor. Does the circulation fan have a rubber plug for oiling or does it have bearings that would need to be replaced? If it has bearings does it also use 608ZZ bearings? Thinking while I'm working on it in the spring I might as well do everything.

[FordMan59]

I did a web search on Hickory and the site came up but using the keyword monitor - it listed zero

I couldn't find the Monitor parts on their web site either, but they do have them. That's the reason I listed their phone number in case anyone wanted to call for pricing or place an order. I also ordered a 1/8"x16"x10' roll of gasket material and a 1'x3' piece of burner mat material from McMaster-Carr today. Thought I should go ahead and order it so I could use the new gaskets as patterns for making more for future use. 10' roll of gasket material and 1 foot of burner mat material was only $35.64, less than the cost of 1 new burner mat buying original Monitor parts.

[HayZee518]

I did a web search on Hickory and the site came up but using the keyword monitor - it listed zero

[FordMan59]

The new burner pot with burn mat, flame ring and gaskets for my 422 came yesterday. Just hoping the Monitor will make it though the winter without any problems so I can tear into it this spring and replace everything so it will be running at 100% next winter. Everything was bought from Hickory Home and Garden in Hickory, NC for $193.45 including shipping to KY. They sell on ebay under the user name hhgconline or their phone number is 1-800-607-0452. Other parts suppliers were quoting $300+ for these parts.

[FordMan59]

HayZee518 thanks for the two previous posts. I too had been looking back at other threads trying to compile information, but all the information being in the same thread will make it much easier.

Thought I'd also post that I found sealed 608ZZ bearings on ebay in case anyone else needs some, the seller is tgm_skateboards. They have 8 sealed 608ZZ bearings for $4.99 with free shipping which is the cheapest I was able to find. While looking on ebay for monitor parts someone had 2 fan bearings listed for $19.95. Quite a difference in the price!!

How often do you have to change the burner mat using the burner mat material from McMaster-Carr. Every year, 2 years, 3 years or longer?

[HayZee518]

8813K11 is gasket material 1/8 thick 1 inch wide
8838K23 is burner mat material .040 thick 1 foot x 40 inches long - $11.40
9323K21 is more gasket material

[HayZee518]

Monitor heaters

I have looked backwards in several posts for parts from McMaster-Carr. Here's what I found:
8813K11, 8838K2, 9323K21, Rutland cement #77 and #641
Bearings for the combustion blower are an 8mm bore, #608Z double sealed
Look on Page 6 thread: Monitor Heater Pics, author: Troy
Also look below some more pics I found

[HayZee518]

see the third posting

[FordMan59]

Is it recommneded to put cement on the thread of the screws when reassembling the unit to prevent them from backing out due to vibration from the heater?

[HayZee518]

a Monitor heater is both complicated and real easy to work on. it is as you know a vented heater. all combustion products are isolated from the room air. the heater "heats" by burning a kerosene product within a closed loop combustion area. outside intake air comes in, is heated in a chamber, goes through a finned heat exchanger and out through a dual walled exhaust tube. heat is blown into the room by one fan.
I'm sure if you look deep enough here you'll find step by step aids for repairing your heater. If I were to post another tear apart directive, it would be redundant. check through the posts and if there is a problem get hold of me or hawkins or dfitz.