I have swapped the front end loader from my B8200 manual to my B8200 HST including the entire sub frame. I am now reassembling my Bradco 8LD back hoe that has been in pieces for perhaps four years in preparation for all new hoses and some pivot pins, bushings and a cylinder rebuild. I would like to understand the finer points about the implementation of the hydraulics. Should I recharge them before installing the cylinders and the hoses? should I seal the connections with thread sealant? Just some guidance so I cover all the bases would be much appreciated and I don't miss any critical points. Should I run a second fluid change after getting it up and running for fear of contaminating the system. Thanks all, Mark, Georgian Bay Ontario
reassembling back hoe
- Thread starter zoombats
- Start date
- You do not need to "charge" anything.
- Flush once and chill.
- Fittings with taper pipe threads require seslant.
- Do not use sealant on fittings with straight threads.
Dan
I would add that you should use sealant and not Teflon tape on your hydraulic fittings with an HST tractor. Just going by what I have read and what I practice myself. Of course, I’m referring to tapered pipe threads that Dan mentioned…
This is akin to oil debates. I will simply point out that Kubota dealer techs use PTFE tape on everything they install. My new L3901 I and you will find tape sealant specified in many of the Kubota work shop manuals.
DAN
I think the risk is that teflon tape may not be applied properly. If no pieces of tape get into the hydraulic system, no problem. If sealant is used, there is no chance for pieces of tape to get into the hydraulic system. In my mind, not using Teflon tape is wise for that reason only.
Depending on the liquid sealant you have the same risk. Common PTFE pipe dope is messy and probably more of a risk than PTFE tape. RectorSeal just as bad. It basically comes down to good assembly practice.
For the truly paranoid I recommend a special purpose product like Loctite 545. Almost GI proof but I am sure someone can still find a way to screw it up.
JMNSHO
Dan
This very well could be true. I don’t know at all. It just seems like a solid piece of tape would be a solid piece of tape when it interacted with something in the HST, while a bit of paste might be dissipated in the fluid, and softer, and cause less damage.
Again, I don’t have a clue. But that just seems reasonable to me using common sense. Of course I’m not gonna try to claim that I have a lot of common sense.