Very good point about replacing the pressure seals in the gland. No point doing half a job.
The piston looks fine, they all have a few marks in them. New seals and it should be good. The main thing that will cause it to not work properly is if there are deep scores in the bore of the tube.
If you didn't know, there have been posts before about how to install new piston seals. You will need to stretch the new piston seal, the yellow one, so it fits over the piston. It will feel loose, so you use cardboard or plastic from a plastic bottle, wrap the piston and use a hose clamp to compress the seal so it shrinks, remove it. Oil it up and install into the cylinder.
Clean the threads and install Loctite, as mentioned earlier, the nuts do loosen up for no good reason without it.
Nice work on the spanner to get the gland off too.
Hi, no post for a long time but i have made some progress. After ordering the new seal kit for the tilt cylinder, i decided to make it look a little bit better than before, this is how it looked like (i have not made photos before started to dismount)
There was "a little bit" dirt in the machine, it was a mix of sand, oil, glas, screws, stones, ...
Than i found that selenoid
using the electic and hydraulic schematics i found it is the bucket position valve and has no idea what the selenoid is used for. Later i bought a parts manual and saw there is an optional on/off kit. The switch was broken and the +12V was not connected at all. The coil was ok so mounted a new switch, connected +12V and it works.
Repainted the cab
and the lift arms
as well as the main frame
mounted new tires and took it out to respray it
found out there was not enougth oil in the vent gearcase, took it out, dismounted it, checked it, filled new oil in, mounted it again.
and spraying it
for the
decals, i found the bobcat logo as eps via google. I drawed the 853 logo and a friend of mine created the decals
My wokshop is not high enough to mount the cab so used a tree
While trying to mount the tilt cylinder with the new seal kit i found out that the piston was buckled. Took the cylinder to a local hydraulics shop and they repaired it (new piston, new head), was cheeper than the bobcat spare parts.
While initially trying it out i found out that the aux hydraulic does not work. Checked selenoid coils: ok, cables: ok, connected the handle and electically it seems to work. Checked it later after assembling all and it worked. It was the switch in the handle, the right one was defect so i used the left one instead. I found the manufacturer of the switch, it is avaiable from mouser for about 9$ but they want to have 50 bucks (+tax +vat) for sending to germany so i left the switch out. Used a standard switch for horn on the left handle with the original wipe and and an additional spring, works fine.
Found a part that is not in the schematics, what is that ? May be a diode to protect the switches when powering off the coil ?
In the meantime i wanted to start the bobcat but i had already mounted the harness in the cab. Have not found the manufacturer of the plugs (was not AMP, may be Delphi) so i build my own remote starter:
And all mounted
The loader works well, however, there are oil leaks somewhere. Today i cleaned the remaining dirt inside the loader using a power washer, will try to find the leaks next week but it seems to be i have to pull the engine. May be the hydrostatic control block or the punps connected to it.