Help and advice needed with jcb 525 tele

[gensetsteve]

Our 1986 telehandler seems to be binding on the brakes on one side. I seem to have a manual for most of our kit but nothing for our jcb done a search on line but nothing helpful. Does anyone know the setup and what oil goes where. It has hydraulic brakes but I have a feeling its not brake fluid in the master cylinder. Thanks in advance for any help its broken at the wrong time asits needed big time in a couple of weeks.

[cookforestry]

Hi There your JBC 525 runs Hydraulic 15 oil through the master cyl if DOT 4 is put in the seals turn to jelly.

The brake system is boosted by a priority valve working on slightly lower than normal Hyd pressure.

I would suggest draining the oil from the front axle to check for brake wear there are a couple of different axles used but the idea is the same. if the oil is very grey/black and small paper like particles are found in the oil then think the worst. also if the oil is over full this could suggest a seal leak inside the axle. they work on a multi plate system nothing too complected but difficult to explain here pm me if you require further info i do also have manuals for these machines if required.

Best of luck

Paul.

[gensetsteve]

Thanks Paul especially the advice about the brake fluid. The oil levelin the centre of the axle was about 1/2" down I stuck my finger in and it felt very black and gritty. I assume hyd 32 will be too thick I was thinking of bleeding brakes and flushing some new hyd fluid through the stuff in ther reservoir looks a bit thick and stale. also I could check after a few minutes the bleed nipple is not holding pressure. I assume I need to drain the axle before I take the two inspection covers off.

[Joy Yeomans]

roh thinks they run mineral oil and not hydraulic oil - but he says he could be wrong we do have a jcb 520 but he says he will have to check tomorrow

 

joy