450 lower rebuild price

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milkie62
40C crawler
40C crawler
Posts: 16
Joined: Fri Oct 20, 2006 3:54 pm

450 lower rebuild price

Post by milkie62 » Sat Apr 13, 2019 9:04 pm

Still learning about dozers and look from time to time for a 450 for my own use. When there is sag in the tracks does that mean they are too worn and in need of replacement ? I have seen some at farm auctions that were used on a farm and auctioneer will say undercarriage @ 50%. What would an approximate price range be to bring it up to 100% ? Also at what percentage of undercarriage are there basically no worries of tracks coming off ? Just wondering if I happen to find a nice older machine and the price is right is it better to have the undercarriage just gone through for longevity. Basically my questions are for my 2 kids who will be building on my property of 100 acres and with nickel and dime jobs over the next 20 yrs,I just assumed it would be nice to have our own machine to use in the woods and for use on the property.Also there will be about 1300 ft of driveway to make ,mostly in fields and taking off topsoil and replacing with fabric and crusher run. Also rebuilding old stone walls from scratch----moving stones,leveling and rebuilding plus all the work around a new home after excavation work. Thanks Ed

dtoots1
2010 crawler
2010 crawler
Posts: 608
Joined: Fri Nov 30, 2012 8:54 am
Location: akron, ohio

Re: 450 lower rebuild price

Post by dtoots1 » Sun Apr 14, 2019 6:33 am

Location Location!!

Helps to add your general location to your profile..find profile in login drop down box!

Jim B
1010 crawler
1010 crawler
Posts: 379
Joined: Sun Nov 05, 2017 11:36 am
Location: western Maine

Re: 450 lower rebuild price

Post by Jim B » Sun Apr 14, 2019 7:00 am

Undercarriage is a big item on a crawler. Stan linked a Dresser document about undercarriage into a post on the FAQ board viewtopic.php?f=2&t=10123&p=55429&hilit ... age#p55429. It has a lot of good info that relates to all undercarriages. You should read and study it, if you haven't, to get a good idea of what is involved. It will fill you in on how an undercarriage is to be measured to determine percent of life. Most numbers thrown out are just someone's idea of what they think the wear is. To me it is just an opinion unless they can show me the measurement records, done by a qualified person, and the comparison to new is calculated. 100% wear is not much when the measurements are followed.

New tracks will sag if not adjusted, so sag is not a determining factor on its own. While usually the less wear an undercarriage has; the less likely a track will come off. I don't know that there is a magical percentage where there are no worries. I have seen operators throw 90+% tracks and others getting by without throwing 150+% tracks. Let them get slack, sliding sideways, running a rock or limbs into them, misaligned, worn components, etc. can cause them to come off.

Tracks are only part of the undercarriage system. Rebuild of the undercarriage system should go along with replacing tracks. Worn sprockets, idlers, and rolls can shorten track life and lead to operational problems. I would plan on a budget of $5000. plus, to go into a 450 undercarriage, figuring I might reuse some components and do the work myself. I would guess two to three times that if you have to send it to a shop. That said many folks, me included, run undercarriages well beyond the 100% limit in scenarios like you are describing as your use would be by using care and common sense. I know mine will need everything when I do it so I am going to get the use out of it I can until then, while starting to gather components.

You need to decide what you want. You may be better off finding one a shop has been through and done the undercarriage, steering clutches, etc.; than a used private sale if you can't, or are not interested in doing the work yourself. That way your purchase price is more but it should reduce major repair costs that could come with a private used sale. JMHO, others will have different thoughts and experiences.

Jim

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