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Dozers pulling scrapers question
- Thread starter boaterri
- Start date
old-iron-habit
Senior Member
1. The wear on the under carriage is less without the heavy blade hanging.
2. Many of the older cable dozers use the CCU to lift the blade so in order to have both sides of the CCU available for the scraper the blade has to be removed.
Others will chime in with more reasons.
2. Many of the older cable dozers use the CCU to lift the blade so in order to have both sides of the CCU available for the scraper the blade has to be removed.
Others will chime in with more reasons.
Having the blade on gives u more weight so u get more traction, BUT u can't cut along batters as the blade is wider then the tracks as well as cutting close to pegs and other obstacles it becomes a hindrance, also creates more dust and cuts down on your forward visibility. We used to always take our blades off, which on a TD 15 size machine u could drop the blade and hook up to the scraper in about 30 mins and the same dropping the scraper and going back to the blade, not the sort of thing would want to do a couple of times a day.
It would be very possible the same could be true with a newer hydraulic dozer as well. A tractor without ripper hydraulics could pull a pan by using the blade hydraulics. The apron and ejector get plumbed together in series for the tilt circuit and the lift circuit runs the bowl.
Scrub Puller
Senior Member
Yair . . . All the reasons listed . . . a direct drive clutch steer tractor with out a blade is a responsive agile beast. Love it. (big grin)
cheers.
cheers.
tctractors
Senior Member
The Blade is dropped off or not fitted when pulling a Scraper to firstly allow the tractor to steer faster and improve manoverability, on CAT tractors D7-8-9 size in my early days we had to swap the front idlers into the High Set position, this involves splitting the track chain undoing a load of nasty bolts and spinning the idler 180 deg, then stuffing things all back together the clipped master link was yet to be invented so a bit of thrashing was involved, with the front idlers in the high set the tractor realy turns fast and seems to gallop away from the cut faster, this also helps with loading as the steering load on the engine is reduced, after the Scraper work is done things had to be swapped back and the winch shafts dropped off and blanking caps fitted to the Aux' drive, so your question about popping off a blade would be nothing work wise to do but makes a big improvement on the speed, handling, fuel used and the amount of muck moved in any conditions, the Plant Manager of 1 outfit I used to do work for sometimes even had you pull off the CCU's after the scraper was pinned and unhitched, the winch would be dropped into the Scraper bowl to be towed away by a truck (not loaded on a trailer)
tctractors
tctractors
Razor
Member
Dozers & scoops.
A few dozer and scoop photos, first a D6 scoop with blade on ( RDG it is Renners machine with Wally at the controls.) second D8H and scoop being pushed by same D6 is a Stevenson's machine operated by Wally's boy Michael,and Richard Stanborough on his TD15 and Onions scoop, all at the Golden Cross mine project Waihi NZ. Next myself on my first dozer and scoop I owned, HD16 & Birtley 70.
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nicky 68a
Senior Member
I only have blades on mine when they are being moved from site to site.
I never worked them together in 25 years apart from a handful of very brief moments.
As TC says,rotating the idler blocks made a suprising difference.Only did it one though as it was too much bother unless you had permanent scraper work
I never worked them together in 25 years apart from a handful of very brief moments.
As TC says,rotating the idler blocks made a suprising difference.Only did it one though as it was too much bother unless you had permanent scraper work
Attachments
nicky 68a
Senior Member
tctractors
Senior Member
ih100, the answer on High Drive units is realy no, although the front idler on a D6H etc does have a spacer shim plate under the mounting that can be removed it never is, the likes of D8-9 tractors loose a good bit of steam on the turn with good boots under them, they even had clipped ends on some plates to help with the turn, when you see a D8 run with the idlers in the high set position, or better still drive the mount to get the feeling of how easy they run, turn, spin and seem to pull better, it seems to make it worth the effort, we used to spin the idlers in the night ready for the 6am start of shift, thinking about it my life must have been crap in places, but we thought it was doing the job right at the time, no one in the U.K. running D8H or K's mucks about with this idler task now, probably because they cannot be bothered but 1 thing is sure CAT would not have gone to the trouble if the end result was not worth it, the tractor also seems to run easier - faster.
dog em into 3rd and let em fly tctractors
dog em into 3rd and let em fly tctractors
Razor
Member
D8 & Scoop
Nicky those are good looking tractor & scoops. What were the jobs? I have had a passion for dozers & scoops & scrapers since I was knee high to a grass hopper,don't think that ever going to change. Here is one of me on D8 & scoop about 30 years ago.
Nicky those are good looking tractor & scoops. What were the jobs? I have had a passion for dozers & scoops & scrapers since I was knee high to a grass hopper,don't think that ever going to change. Here is one of me on D8 & scoop about 30 years ago.
