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General Bobcat Skidsteer Forum
763G (No ACS) - No bucket tilt or lift. Tilt and Lift Spool Lock Solenoids Clicking
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<blockquote data-quote="feetball" data-source="post: 126309" data-attributes="member: 23201"><p>I've got a perplexing issue that I cannot seem to find the root cause for. Has anyone experienced similar symptoms?</p><p></p><p><strong>~2000 763G - No ACS - No Bucket Positioning - Tilt and Lift spool lock solenoids clicking when machine is on and seat bar lowered. No Tilt and Lift Action</strong></p><p><strong></strong></p><p><strong>Symptoms:</strong></p><ul> <li data-xf-list-type="ul">Tilt Spool Lock and Lift Spool Lock solenoids are clicking at a ~1second interval (click every one second)</li> <li data-xf-list-type="ul">Both solenoids are clicking. I can disconnect one or the other and the connected one continues to click. Disconnect both and the clicking stops.</li> <li data-xf-list-type="ul">Both pedals are locked.</li> <li data-xf-list-type="ul">If I press pedals between clicks, every once in a while they will unlock and operate until pedal released. I cannot determine a specific pattern that works every time. It seems random.</li> <li data-xf-list-type="ul">Clicking sound starts immediately when seat bar is lowered regardless if the machine is running or not.</li> </ul><p><strong>Diagnostics:</strong></p><ul> <li data-xf-list-type="ul">No codes</li> <li data-xf-list-type="ul">Both solenoids have a 7.4 ohm resistance</li> <li data-xf-list-type="ul">Seat Bar and Lift & Tilt Valve lights are on solid and no blinking when seat bar is lowered.</li> <li data-xf-list-type="ul">Press to Operate Loader light comes on fine when pressed.</li> <li data-xf-list-type="ul">Voltage is at 14.4V running and 12.8 not running</li> <li data-xf-list-type="ul">Machine starts and runs fine.</li> <li data-xf-list-type="ul">Machine will move forward and backward fine.</li> <li data-xf-list-type="ul">I'm seeing ~12.4V pulses on positive wire of solenoids corresponding to the clicks.</li> <li data-xf-list-type="ul">I see a PWM signal (showing a frequency) on positive wire of solenoids.</li> <li data-xf-list-type="ul">Checked grounds on chassis near cab pivot point and seat.</li> <li data-xf-list-type="ul">Wiggling various connectors on the harness and connectors at control module has no effect. </li> <li data-xf-list-type="ul">Control module connections and solenoid connections are clean.</li> </ul></blockquote><p></p>
[QUOTE="feetball, post: 126309, member: 23201"] I've got a perplexing issue that I cannot seem to find the root cause for. Has anyone experienced similar symptoms? [B]~2000 763G - No ACS - No Bucket Positioning - Tilt and Lift spool lock solenoids clicking when machine is on and seat bar lowered. No Tilt and Lift Action Symptoms:[/B] [LIST] [*]Tilt Spool Lock and Lift Spool Lock solenoids are clicking at a ~1second interval (click every one second) [*]Both solenoids are clicking. I can disconnect one or the other and the connected one continues to click. Disconnect both and the clicking stops. [*]Both pedals are locked. [*]If I press pedals between clicks, every once in a while they will unlock and operate until pedal released. I cannot determine a specific pattern that works every time. It seems random. [*]Clicking sound starts immediately when seat bar is lowered regardless if the machine is running or not. [/LIST] [B]Diagnostics:[/B] [LIST] [*]No codes [*]Both solenoids have a 7.4 ohm resistance [*]Seat Bar and Lift & Tilt Valve lights are on solid and no blinking when seat bar is lowered. [*]Press to Operate Loader light comes on fine when pressed. [*]Voltage is at 14.4V running and 12.8 not running [*]Machine starts and runs fine. [*]Machine will move forward and backward fine. [*]I'm seeing ~12.4V pulses on positive wire of solenoids corresponding to the clicks. [*]I see a PWM signal (showing a frequency) on positive wire of solenoids. [*]Checked grounds on chassis near cab pivot point and seat. [*]Wiggling various connectors on the harness and connectors at control module has no effect. [*]Control module connections and solenoid connections are clean. [/LIST] [/QUOTE]
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General Bobcat Skidsteer Forum
763G (No ACS) - No bucket tilt or lift. Tilt and Lift Spool Lock Solenoids Clicking
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