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Block heater install for 955

13K views 10 replies 6 participants last post by  pitpawten  
#1 ·
Hey folks,

In light of the block heater install that jd8504x4 did here on his 850, I thought I'd post up the install I did on my 955.

First of all, it looks like the Zerostart heater that I tracked down on the net is an exact substitute for the JD part.

JD part #AR87167

Zerostart part #3100003.

I bought it from After Hours Autoparts.com for $28.29 plus tax and shipping. It was the lowest price I found on the net. It arrived the day after I placed the order, that was fast! Never did any business with that outfit before, or even heard of them for that matter. :fing32:

The first thing to do is drain the coolant from the radiator, then remove the exhaust pipe so you have clearance to access the threaded plug in the center of the engine block. I also had to move the bracket that keeps the wiring harness "captured" up against the block to the side for clearance to remove the plug and insert the heater.

I used a 1/2" straight extension and breaker bar with a 3' pipe on it to finally break the plug loose. It was in there pretty good. Thought that I was going to break the extension. :i_praying Make sure you have a catch basin for the coolant that will drain from the block.

I used teflon pipe thread tape on the threads of the heater, you can use pipe joint compound instead if you like. The instructions that came with the heater said either are sufficient.

I wiped the engine block and threads dry, then threaded the heater into the block, and tightened with a 1-3/8" socket on a 3/4" drive straight extension and ratchet. Be careful to not over tighten and strip the threads. I just tightened until I was confident it was tight.

I installed the heater plug into the unit (make sure you push it in all the way, it fits tight) and ran the electrical cord alongside the block, away from the exhaust pipe and secured it with zip ties to the wiring harness above the starter, ran it back to the firewall, then up the firewall and around to the back of it between it and the fuel tank. The power cord stays coiled up on top of the fuel tank and is accessible by lifting the hood.

Replace the coolant to the proper level, run the engine until hot, then check thoroughly for any leaks.

This took me about an hour.

Hope this helps others.

Fran

:Tractor2:
 

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#4 ·
This is great, going to do this as a fall project.

Trying to start my 955 last winter, I burned up my Starter and Battery found all the weak spots in my system and replaced them :)

Eventually had to pour a kettle of near-boiling water down the block and hit the oil pan with a torch just to get it to kick over.

Good writeup!
 
#6 ·
Good write-ups--but I understand El Nino~ is headed this way to the USA for winter and spring......We may all need fans and A/C--or boats for flooding..

BTW--to the O/Poster--I really dig the complete threads like yours where you show the tools and procedure--not just 'guess' that we might somehow know.....Pictures worth 1000 words!

Thankee!

glenn
 
#8 ·
Just installed mine, was super easy (~10 mins actual install).

Took the time to do a coolant flush as well while it was drained.

I also ordered up an Exhaust Wrap (
) to keep the heat down. I dont like the exhaust being so close to the wiring, and I think it may have even been causing some issues with the starter previously. I'll report back how it works.

Now, anyone using a DC>AC Inverter (~450w) to run this thing on a limited basis?

I have no AC in the barn so thought is to hook this up to an Inverter, and since this draws 400W (how its rated) I should be able to run it for a limited time in the mornings I plan to use it and then let the Alternator bring the battery back up. Add a solar trickle charger and hopefully this will work.

Anyone do similar or have thoughts?
 
#10 ·
I think that a cellphone is one of the best tools a farm mechanic can carry around...you simply take a picture as you disassemble and then you can go back and see exactly how it all went back together! The hi-rez didgitals that smart phones can deliver allow you to zoom in and really see what was going on.
Before figuring this out every one of my tractor and car repair projects followed the same course of events: disassembly with mental promises that I would remember how it all went together, followed by 3-8 days of awaiting parts needed while I forgot reassembly. The time period has been rapidly shrinking with age...