Hi,
I refilled the transmission with oil and I tested it. The steering seems to work (at least, when the wheels are lifted from the ground), indicating that the pump is working. However I have no forward or reverse. :(
I tried to figure out if the problem is electric or hydraulic. Here is a part of the schematics:
Item 86, the switch nead point a, is the forward and backward switch. I have good 12V on point C. When I put it in forward, I have about 12V on point a (BG and YR connection). When I put it in reverse I have 12V on YP/BW connection). So the switch looks good.
Then I tried to measure the resistance of the coil (forward is item 49, reverse is item 47). I have about 6 Ohm between point a and point b, which leads me to believe that forward solenoid is correctly connected. However, the circuit seems to be open between point D and point B. Point B is the emergency drive switch in the console, near the starting switch.
Furthermore, I looked at the voltage on point C when the switch is on. When I put it in forward, voltage drops at point C to 11V or 11.5V, indicating that there is a load. When I go in reverse, the voltage stays at 12V on point C.
Anybody ever fixed or replaced a transmission solenoid? It seems very hard to reach.
jf
I refilled the transmission with oil and I tested it. The steering seems to work (at least, when the wheels are lifted from the ground), indicating that the pump is working. However I have no forward or reverse. :(
I tried to figure out if the problem is electric or hydraulic. Here is a part of the schematics:
Item 86, the switch nead point a, is the forward and backward switch. I have good 12V on point C. When I put it in forward, I have about 12V on point a (BG and YR connection). When I put it in reverse I have 12V on YP/BW connection). So the switch looks good.
Then I tried to measure the resistance of the coil (forward is item 49, reverse is item 47). I have about 6 Ohm between point a and point b, which leads me to believe that forward solenoid is correctly connected. However, the circuit seems to be open between point D and point B. Point B is the emergency drive switch in the console, near the starting switch.
Furthermore, I looked at the voltage on point C when the switch is on. When I put it in forward, voltage drops at point C to 11V or 11.5V, indicating that there is a load. When I go in reverse, the voltage stays at 12V on point C.
Anybody ever fixed or replaced a transmission solenoid? It seems very hard to reach.
jf
Massey Fergusson 50 HX transmission problem: solenoid problem? (with Diagram).
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