R
RVH plant
New member
JCB 437 I’ve changed the charge pump and torque converter filter but still won’t make pressure can any one put me in the right direction thank u
V8Druid
do it as well as you can,but learn to do it better
CPS
Well-known member
Stupid question maybe, but has the flexi plate been checked? I mean is it definitely turning the torque converter?
R
RVH plant
New member
Yes flex plate ok definitely turning as the Hydrulics work of transmission thank you for your reply
CPS
Well-known member
Is it a ZF transmission?
R
RVH plant
New member
Yes mate
jd6820
Well-known member
Presumably if it isn't making pressure the transmission oil pressure light is on? Does it come on on startup or when a direction is selected?
R
RVH plant
New member
Nothing no lights
jd6820
Well-known member
I think the attached PDF will be the same oil flow as your machine. Assuming you are creating oil flow from the transmission pump then at test point 38 you should get the pressure stated on the transmission serial/date plate. Reading will be measured in BAR. If this pressure isn't being made you have many places it can reach the tank without even having a clutch pack engaged. This is through system pressure regulating valve 4 or any of the regulating valves 6. The bad news is they are all internal to the hydraulic manifold.... Test point 38 I think is labelled 'K' on the hydraulic manifold. Where are you testing system pressure at?
CPS
Well-known member
I'm not super familiar with the ZF transmissions, but I seam to remember replacing torque converters on some smaller JCB loaders.
To me it's sounding like it could be the torque or the oil pump.
R
RVH plant
New member
Both brand new
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