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Farm Machinery
Machinery
Valtra 6400 2005 year.
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<blockquote data-quote="Northern farmer" data-source="post: 7913401" data-attributes="member: 4568"><p>I thought the drive is the only ECU on a Valtra 6400 but there indeed seems to be a small box. </p><p></p><p>The system has two solenoid driven valves. I thought it should move if both solenoids were idle but perhaps not. Not knowing how the power shift drives work, perhaps the "all idle" state means no drive. Having driven, and parked a similar tractor I though the transmission was engaged when parked (shut down) but the tractor has a turbine that anyway allows the tractor to move even when parked and gear engaged. Three power shift gears needs three out of the totally 4 states of the control relays. Would it mean no drive when solenoids are idle, first gear with one solenoid active, second and third gear with the rest of the two (hopefully a sequence of solenoid one, both solenoids, solenoid 2 to avoid the simultaneous change of both solenoids and hydraulic drives).</p><p></p><p>I would then feed measurement wires from both solenoids hot side and monitor the voltage on each gear when the gears work, then compare the state when the tractor does not move.</p><p></p><p>Since all indicator lights are off when the issue is active, I'd also check that the fuse gives a good contact (F11).</p><p></p><p>The forum must have several mechanics who have worked with a similar transmission and should be able to provide proper help. Are all after the opportunity to be able to charge for the repair?</p></blockquote><p></p>
[QUOTE="Northern farmer, post: 7913401, member: 4568"] I thought the drive is the only ECU on a Valtra 6400 but there indeed seems to be a small box. The system has two solenoid driven valves. I thought it should move if both solenoids were idle but perhaps not. Not knowing how the power shift drives work, perhaps the "all idle" state means no drive. Having driven, and parked a similar tractor I though the transmission was engaged when parked (shut down) but the tractor has a turbine that anyway allows the tractor to move even when parked and gear engaged. Three power shift gears needs three out of the totally 4 states of the control relays. Would it mean no drive when solenoids are idle, first gear with one solenoid active, second and third gear with the rest of the two (hopefully a sequence of solenoid one, both solenoids, solenoid 2 to avoid the simultaneous change of both solenoids and hydraulic drives). I would then feed measurement wires from both solenoids hot side and monitor the voltage on each gear when the gears work, then compare the state when the tractor does not move. Since all indicator lights are off when the issue is active, I'd also check that the fuse gives a good contact (F11). The forum must have several mechanics who have worked with a similar transmission and should be able to provide proper help. Are all after the opportunity to be able to charge for the repair? [/QUOTE]
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Valtra 6400 2005 year.
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