Where is the fine swing switch on an excavator?
Where is the fine swing switch on an excavator?
The purple wire should have 24v when the fine swing switch is ON and the key is ON. The switch for fine swing control is on the right console. Switch for Fine Swing Control – Push down on the right side of the switch in order to activate the fine swing control. This improves swing control during deceleration of a swing.
Why does my excavator not swing in either direction?
The rear solenoid had no power on either wire. At full throttle on right console left switch down and right switch held up lights flash on panel, while doing this moving the swing lever in either direction I can feel it bump each time the lights flash. The machine still does not swing. Any suggestions? I did miss a step for you to test.
Where is the solenoid wire on an excavator?
The L973 green wire provides the fine swing solenoid ground at the switch. A K906 green wire is the control from the ECM, this wire runs through the back-up mode switch (K907 green) located in the rear of the right hand console. This switch can be placed in back-up mode to test the solenoid also. Try it in back-up and see if brake releases.
Where are the solenoids on a 322bl excavator?
A K906 green wire is the control from the ECM, this wire runs through the back-up mode switch (K907 green) located in the rear of the right hand console. This switch can be placed in back-up mode to test the solenoid also. Try it in back-up and see if brake releases. Your model should have two solenoids.
The purple wire should have 24v when the fine swing switch is ON and the key is ON. The switch for fine swing control is on the right console. Switch for Fine Swing Control – Push down on the right side of the switch in order to activate the fine swing control. This improves swing control during deceleration of a swing.
Why does my excavator not stop the house from turning?
Anything over 0.070 up and down is worn out. Swing brakes do not stop the house from turning. They only hold the house in place after the controls are all released for about 7 seconds or so. Swing motor pinion leaks show up on the swing bearing. Hydraulic oil leak appearing from around the ring gear (where cab swivels on the tracks).
What to do if your excavator won’t swing?
If no problems are found, unbolt the ECM and inspect the bottom for corrosion. A hole through the cover will allow moisture in and damage it. The other solenoid is for fine swing. It has the purple and green wires connected to it. The purple wire should have 24v when the fine swing switch is ON and the key is ON.
How is the swing power of an excavator determined?
Swing power is generally determined by the reduction in the swing gear box and the sizes of the swing pinion and ring gear. Make the swing too powerful and the speed is reduced loosing production. Make the swing too fast and you loose start up power and use more fuel because of the increased load on the engine.
Is the PC 120-3 excavator swing still working?
Komatsu pc 120-3 excavator swing… I’m working for a guy who bought an old worn out PC120, to do 2 projects. It’s really tired& worn, but it’s stayed together pretty well. Last year, the swing quit working, and i installed a new solenoid (from China) on the valve block under the machine. It got well.
What to do if your excavator swing brake does not work?
If the purple wire does not have power, trace the wires back to the fuse. If the green wire does not have continuity to ground, trace the wires to the switch and check the switch wires for ground. Swing brake should release if either of the solenoids work. Both do the same function.
Why is my Komatsu excavator swing not working?
It got well. This year, after about 100 hrs of use, the swing again won’t work. The swing motor is obviously good, because the engine loads down when you move the lever (swing is side movement of left joystick) I reached up under the machine, and the replaced solenoid is warm, and won’t slide off the shank, when the engine is running.
When to use the swing brake on an excavator?
Operate the machine with the switch in the OFF position when great swing forces are required. For example, digging on a sidewall requires great swing force. Operate the machine with the switch in the OFF position in order to control the motion with the swing brake. The purple wire gets voltage from the fine swing fuse.
Where is the back up mode switch on an excavator?
A K906 green wire is the control from the ECM, this wire runs through the back-up mode switch (K907 green) located in the rear of the right hand console. This switch can be placed in back-up mode to test the solenoid also. Try it in back-up and see if brake releases.
