JD40C safety block

hkbackus · Post by **hkbackus** » Thu May 31, 2007 11:38 am

Lavoy
I am looking for a Track safety block & 3 or 4 shims.Would you happen to have one?
Thanks Herb.

Post by **Lavoy** » Thu May 31, 2007 7:29 pm

I am kind of hurting on used track stops, especially if it is an MC or 3 roller 40. I have a few shims on hand, am planning on making them some day, just need to find the time.
Lavoy

hkbackus · Post by **hkbackus** » Sat Jun 02, 2007 6:10 am

Sorry I didn't specify. The safety block is for a 40- 4 roller.
Herb.

Post by **Lavoy** » Sat Jun 02, 2007 7:03 am

I may have used ones, new ones might still be available yet too. I am working on the clamps right now.
Lavoy

hkbackus · Post by **hkbackus** » Sat Jun 02, 2007 7:34 pm

If you have a good used one with spacers, could you send it out to me? Let me know what the cost is.
Thanks
Herb

Post by **Lavoy** » Sun Jun 03, 2007 7:24 pm

Herb,
Send me an e-mail, and I will get back to you when I check.
Lavoy

donol60 · Post by **donol60** » Tue Jun 05, 2007 10:57 am

OK you guys got me now---I have 2 JD 420s in my yard--1 JD 40,4 roller--1 JD 40, 3 roller, have worked on crawlers for years, but i must have missed or overlooked something, What is a track safety block & shims, never heard the term before, other than a wood block placed at the tracks to keep from rolling on it/s own? Thank You in advance, Don

hkbackus · Post by **hkbackus** » Tue Jun 05, 2007 12:20 pm

Don
I may have mispoken whin i called them TRACK safety blocks. The parts catalog just calls them safety blocks, part# 19 & 20, page 65-2. They bolt to the rear cross bar allowing the sprocket to contact them which is suppose to stop the tractor in case the tracks become clogged. They apparently work, bothof mine are completely shot.

Herb

Post by **Lavoy** » Wed Jun 06, 2007 9:55 am

Usually they get worn out when the bearings go out of the final drive and the sprocket starts to rub on them and people do not replace the bearings.
Lavoy

hkbackus · Post by **hkbackus** » Wed Jun 06, 2007 10:31 am

You are right Lavoy. Thats exactly what happener to mine.

Herb

Stan Disbrow · Post by **Stan Disbrow** » Wed Jun 06, 2007 12:39 pm

Hi,

Yep. My 420c, which has lots and lots of well-maintained hours on her, has never had either sprocket come up against the safety block. Of course, she's never had the bearings run out of her, either!

Stan

donol60 · Post by **donol60** » Sat Jun 09, 2007 8:02 am

I don/t have a parts book,just couldn/t understand what a track saftey block was, now i know thanks to you guys on this forum. I have always thought these saftey blocks were a gaurd to keep the sprocket from pushing stones and debris against the rear roller. I have seen these blocks wornout, always an indication of bad finaldrive bearings and or a loose trackframe, or loose rock shafts. I have never seen any shims for these blocks on any machines i have or have worked on.
Thanks Much for the information, Don

JDcrawlers Messageboard