2007 Rayco c87fm problem

[redprospector]

If the hit was severe it could have bent the rotor shafts which will cause the same kind of vibration. The best way to check for it is with a dial indicator. If it is bent you will never be able to balance it out and it will have to be put in a lathe to be straightened. Don't ask how I know.

How do you know? :laughing:
Sorry Tony, I couldn't resist.

 

[tonyoz]

Dang...how much did that run ya?

In Aust most things cost double what you blokes pay.
$5000 to straighten and got done over on the balancing $2500. Not a bad bill since I had started in this business 3mths prior eh
Last time it was $2500 for straitening and $200 for balancing.

Andy, hidden bolts in old strainer posts are not your friend, smashed a bearing, 14thou runout one side and 12 the other, 2nd time a lump of hard timber that had been baked in a fire become the problem, 20thou runout one side only and no hired help to blame..How is the 90 going???

 

[yellowdogsvc]

look carefully for a piece of wood wedged between a tooth.. won't take much to change balance.

 

[yellowdogsvc]

do you guys dial your speed down when mulching? I set my speed down to about 33% of max and just go slow. I occasionally hit something really hard and chip carbide. I also started setting my ride control to cushion the head and allow it to follow the ground more and it seems to help it skip when it hits something hard. I don't mulch full time because of my other services and I am hoping I don't have any more major repairs for awhile.
Just replaced my lexan and wiper $1200 and the A/C kept the machine in the shop 3 weeks while they looked for the problem. Evidently it had a slow leak that was hard to detect without dye.
Always something. I need tires, too..

Good luck finding the source of the vibration. Hopefully it's missing bolt, wood wedged, or a missing tooth.. something minor.

 

[redprospector]

Andy, hidden bolts in old strainer posts are not your friend, smashed a bearing, 14thou runout one side and 12 the other, 2nd time a lump of hard timber that had been baked in a fire become the problem, 20thou runout one side only and no hired help to blame..How is the 90 going???

Hahaha. I know the feeling of not having hired help to blame. I can hire people that want to run a chainsaw a little, and once in a while I can get one that thinks they want to run the log skidder, but none of them want to run a mulcher. :laughing:
The 90's doing pretty good. I re-disassembled it to get the ac working, and am hoping to have it back together again soon. I've enlisted the help of a mechanic friend of mine because I know absolutely nothing about working on air conditioning. What I do know is that I like working with air conditioning in the summer. I put a meat thermometer in the cab the other day, and with sun beating on Lexan I saw 125* F. I brought it home and put the Bobcat back to work until the ac works.

 

[redprospector]

do you guys dial your speed down when mulching? I set my speed down to about 33% of max and just go slow. I occasionally hit something really hard and chip carbide. I also started setting my ride control to cushion the head and allow it to follow the ground more and it seems to help it skip when it hits something hard. I don't mulch full time because of my other services and I am hoping I don't have any more major repairs for awhile.
Just replaced my lexan and wiper $1200 and the A/C kept the machine in the shop 3 weeks while they looked for the problem. Evidently it had a slow leak that was hard to detect without dye.
Always something. I need tires, too..

Good luck finding the source of the vibration. Hopefully it's missing bolt, wood wedged, or a missing tooth.. something minor.

I set my drive speed down to about 40% most of the time when mulching, sometimes less. I set the engine speed at about 2150 and work away.
I have found that setting it this way I'm not jerking around, I can ease into things much better, and my engine temperature stays in the acceptable operating range longer. At the end of the day I can do more by slowing down a little.

 

[tonyoz]

Re: 2007 Rayco c87fm problem.

Chase, have you found the vibration problem yet?

 

[chasepollard]

Re: 2007 Rayco c87fm problem.

Chase, have you found the vibration problem yet?

Yes, I sure did! I replaced the tooth and it went right into balance.

Now I am catching a warning light at high RPMs with my orange hydraulic light. It comes on when RPMs reach 2000 until I bog the head down. Does anybody have any advice on this?

Thanks

 

[tonyoz]

Re: 2007 Rayco c87fm problem.

It's either hyd oil level or blocked filter. To check the filter uncouple the wire on the filter housing and run the mulcher at high RPM's. If the light stays out then that's the problem. You can check the other filters the same way if they have sensors on them. At high RPMs the cutter pump will be sucking the max amount of oil hence the drop in oil level and as the rotor slows the oil level will rise slightly cutting out the light. Hope this helps and that's all it is.

PS If it is the filter that is blocked change it immediately, cut the old filter open and see if there is any brass in it and also check the canister for any debris (brass or steel fillings). Also check the drain plug magnet. 2 places that this stuff comes from is the hydraulic motor or pump.
Gees I hate being a gloom merchant.

 

[chasepollard]

I actually unhooked a hose from the head and drained all the oil...put new oil in and it ran like new. I am finishing this job and taking it in for service at just over 100 hours.