Timing Gears

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GeoffDEAL
Posts: 424
Joined: Tue Jan 27, 2009 8:25 am
Location: New Zealand

Timing Gears

Post by GeoffDEAL » Mon May 27, 2019 9:43 pm

I was recently asked if they are available for a 995 but i have never done any since my 1200 many years ago when such parts were available and would think scrap motors would be the main source in our part of the world. Appears to be one of the few parts not available after market that one cannot get around apart from gear cutting.

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cobbadog
Posts: 586
Joined: Tue Oct 11, 2011 6:18 am
Location: beautiful Coopernook NSW. near Taree. NSW. Australia

Re: Timing Gears

Post by cobbadog » Tue May 28, 2019 7:25 am

Scrappers are the only suppliers around here too. My 30C has a few chips off a couple of teeth and the idler gear from crankshaft to governor had quite a few half broken teeth. I then noticed a missing bolt that may have gone through the gears to cause the damage. Luckily a mate had a garden ornament with a couple of good gears so he sent me them. It was not until re assembly that I noticed a problem and thankfully I have marked all the gears before I stripped them out for the engine rebuild. The Cam gear is off another engine and has a different original timing mark on it. So I put it back together using my marks and it started instantly on the first attempt, so that can be something to look out for when searching for a replacement gear.

jazo
Posts: 773
Joined: Fri Jun 15, 2007 7:13 am
Location: New Zealand

Re: Timing Gears

Post by jazo » Tue May 28, 2019 8:17 am

I'm just replacing a set on a 990 with a ad4/47 engine with power steering pump aswell. Apparently hard to come by the power steering drive gear. But my wrecker supplied all I needed. Anyone know why they fail unexpectedly?
1394 4wd
1294 4wd
30D
990x2
880
780x2
900

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ollek
Posts: 3798
Joined: Tue Apr 10, 2012 1:20 pm
Location: South West Finland

Re: Timing Gears

Post by ollek » Tue May 28, 2019 8:52 am

Early tractors had coarse cast gears. These gears were later superseded with dense steel gears. This change was made because some of the cast gears failed, especially in tractors with power steering pump.

Scooby
Posts: 3927
Joined: Tue Jan 03, 2006 8:16 pm
Location: Warwickshire

Re: Timing Gears

Post by Scooby » Tue May 28, 2019 9:19 am

jazo wrote:
Tue May 28, 2019 8:17 am
I'm just replacing a set on a 990 with a ad4/47 engine with power steering pump aswell. Apparently hard to come by the power steering drive gear. But my wrecker supplied all I needed. Anyone know why they fail unexpectedly?
You're lucky Jazo. I bought a new 990 in 1967, obviously with a 47 engine and it was delivered 20 miles away from my yard where I was baling straw for a customer. After about a week I could hear a "ticking" noise coming from the timing cover and the dealers came out and had to replace the timing gears. No power steering. Only wimps had power steering in those days. :lol:
ImageImage


Three is twee, four does snore, but 6 just clicks........Scooby

jazo
Posts: 773
Joined: Fri Jun 15, 2007 7:13 am
Location: New Zealand

Re: Timing Gears

Post by jazo » Thu Jun 06, 2019 7:19 pm

After removing the injector pump gear I found at some point someone had fitted a bolt that was to long holding the power steering pump on and this was pushing into the rear of the injector pump gear, hopefully good for another 50 years now!
1394 4wd
1294 4wd
30D
990x2
880
780x2
900

User avatar
cobbadog
Posts: 586
Joined: Tue Oct 11, 2011 6:18 am
Location: beautiful Coopernook NSW. near Taree. NSW. Australia

Re: Timing Gears

Post by cobbadog » Sat Jun 08, 2019 4:28 am

Lucky you discovered it at this stage and not when it's too late.

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