MTS MT28 — Scrapers

Does anybody have experience with these pull pans?I am not the company accountant but it seems to me that these are prone to premature tire failure. Has anybody tried to rectify their pan tire short comings?

Premature failures? What kind of failures? Under-inflation or running over steel pointed objects creating small holes that aren't noticed? I can recommend tire pressure monitoring that the operator can see in the cab. doranmfg.com I'm a dealer. Sensors are available for large bore stems.

I haven't run these scrapers specifically. Are the tires different from similar scrapers? What type of tire failure are you seeing? Punctures? Sidewall cuts? Tread separation? Casing failure? Are the caps installed on the valve stems? What type of sites are you working on? Are they rocky? Any debris from previous buildings or parking lots? Or greenfield sites with clean dirt? What tire pressure are you running? Over or under inflated? Are the haul roads kept clear of anything that'll harm tires? Are the operators checking the rigs over before starting and at every break? I'm my opinion the operators should be looking over the entire rig and especially the tires every morning, at lunch time, and end of shift at a minimum. Pictures of the tires may help.

mekon said: Does anybody have experience with these pull pans?I am not the company accountant but it seems to me that these are prone to premature tire failure. Click to expand... Solid Deal tires???

mekon said: Has anybody tried to rectify their pan tire short comings? Click to expand... What brand, model, specfications, & TRA Rating of tyres do you have on your scrapers at this time.? All the spec sheet say is 26.5R25. Are you using radials.?

Tire failure is a pretty generic term. Are the tires failing or just loosing air?

OK let me back this up.It seems like belt or cord separation and then a bulging area that blows.The resulting sound from the blow out makes anybody on-site think there is a terror attack. Nige,I assume they are replacing with like spec tires,but I generally stay away from those machines if possible so I don't pay close attention . AMBMike they are usually in mud and clays,currently running in sand.Tire inflation is a good question ,the inner tire is impossible to check, the outer tire would be possible but the guys dont(at least they grease fairly regularly) Questionable Wizards pressure sensors with a cab remote may be the right tool to have,I will pass that idea on to the guys whith the check book. It just seems to me that one of the pans are down every couple of months with a failure. I just never see haul trucks or scrapers with such tire issues.

mekon said: I assume they are replacing with like spec tires,but I generally stay away from those machines if possible so I don't pay close attention . Click to expand... That doesn't help much. Just as an example if the OEM tyres are in any way borderline as regards load-carrying capacity (seen it plenty of times on many different types of machine) then replacing "like with like" is only inviting another failure. Need the data as requested above - size, brand, model, specfications, & TRA Rating. Add to that list cold inflation pressure. Help us to help you by providing something to go on. You can do whatever you like with pressures but if the tyre itself is not up to the job then you will be flogging a dead horse. mekon said: he inner tire is impossible to check, Click to expand... Why.? Doesn't the inner have an extended valve stem that allows it to be checked from the outside.? If not that is a major design flaw.

I haven't operated these scrapers specifically but similar scrapers have the outer valve stems pointed out and the inner valve stems pointed toward the center. Typically these are individually mounted, not a dual wheel setup. Each tire rotates individually and is not connected to the others. To check the tire pressure you lower the scraper until it lifts the tires free then squat down behind and to the side of (not under) the tire and rotate it until the stem is in reach. You can check all 4 tires with a gauge in ten minutes or less unless the tire is caked with mud.

Tire spacers ,they need to be thrown away AMBMike said: I haven't operated these scrapers specifically but similar scrapers have the outer valve stems pointed out and the inner valve stems pointed toward the center. Typically these are individually mounted, not a dual wheel setup. Each tire rotates individually and is not connected to the others. To check the tire pressure you lower the scraper until it lifts the tires free then squat down behind and to the side of (not under) the tire and rotate it until the stem is in reach. You can check all 4 tires with a gauge in ten minutes or less unless the tire is caked with mud. Click to expand...

Nige said: That doesn't help much. Just as an example if the OEM tyres are in any way borderline as regards load-carrying capacity (seen it plenty of times on many different types of machine) then replacing "like with like" is only inviting another failure. Need the data as requested above - size, brand, model, specfications, & TRA Rating. Add to that list cold inflation pressure. Help us to help you by providing something to go on. You can do whatever you like with pressures but if the tyre itself is not up to the job then you will be flogging a dead horse. Why.? Doesn't the inner have an extended valve stem that allows it to be checked from the outside.? If not that is a major design flaw. Click to expand... It's possible the factory underestimated the load weight and these things over load them selves.I will be back up there tomorrow and get some size and load ratings off the pan

mekon said: I will be back up there tomorrow and get some size and load ratings off the pan Click to expand... Excellent, but while you are doing that get all the information from the tyres as well. A few photos might not go amiss either.

mekon said: It's possible the factory underestimated the load weight and these things over load them selves.I will be back up there tomorrow and get some size and load ratings off the pan Click to expand... WHAT BRAND are they???

Are the tires blowing out the original tires? I'm sure there are some outfits looking for the cheapest way to replace tires and will try to get away with using the lowest cost tires that fit but may not have as many plies as the original tires. Also if they're running lower pressures because of soft conditions they might have to use tires with even more plies than the original or have to run recommended pressure. I've seen a lot of old scrapers and even loaders with questionable looking tires that look to be original but are still holding up just fine.

We run loads of MTS scraper pans. No abnormal tire failures usually just getting punctures from debris or operator error. Personally sounds like the pans are being over loaded, that's on the operators though. They should know when to stop.

Zewnten said: Personally sounds like the pans are being over loaded, that's on the operators though. They should know when to stop. Click to expand... What kind of nonsense is this. Overloading a scraper? I can't imagine anything of the sort. If the tires can't handle what can fit in the scoop, GET DIFFERENT TIRES.

When the county improved the road to my property they had an old 627 scraper that at one point had the back tires bounce off the ground with a full load. Didn't hurt anything but the guy driving said not to tell the boss (public works manager) who was checking on the progress. They also had an old pull scraper behind a D8H and no tire issues even when pulling it on the highway. The D8 was on the trailer and pulled the scraper behind. Perhaps some pics. of the suspect tires would help.

It's all speculation until we have good data including:

1. Pictures of the tires both pre and post failure.
2. Tire brand, recommended inflation pressure for expected load, and load rating.
3. Tire inflation. Are they over, under, or at recommended inflation for the load?
4. Which tires are failing? Inner, outer, or both equally?
5. Are the scrapers stock or have side boards been added?
6. Are the pulling units tracked or on tires? If on tires are they having failures as well? If tracked are they lasting as expected?
7. What condition are the haul roads?
8. Are the failures happening approximately equally across all units or are some operators experiencing more failures than others? Pictures of normal operating conditions and videos of how the scrapers are typically operated would also help.

Shimmy1 said: What kind of nonsense is this. Overloading a scraper? I can't imagine anything of the sort. If the tires can't handle what can fit in the scoop, GET DIFFERENT TIRES. Click to expand... Putting almost 50 yards in a 35 yard scraper is window licking stupid.

Are the scrapers modified? How are they getting 40% more than rated capacity?