Machine has been sitting for 3 yrs. Has Kubota motor. Drained hydraulic oil, changed filters, and refilled hydro oil. Machine moves great but boom and bucket wont move but 1 inch. I hear load on motor and no whinning sound from hydraulics. Both seat switches have been jumped out. Everyone is talking about a solenoid valve for the hydro system. Where is this valve? Please help!!!!
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Depending on where you bypassed the seat switches the results may not be what you expect. If you bypassed at the long connector the system will not work. The harness between this long connector and the seat switches contains a resistor which must be in the circuit for the system to work.
The first thing to check is the operate/service switch at the lower front corner of the operator restraint control box on the right side of the seat. It is a small toggle switch. Check that the switch is in the operate position.
If that is in the right position then look at the lower rear corner of the operator restraint control box. You will see a series of 4 small opening which contain LED lights. A mirror might help you see them. I don't remember how they are labled but I think they are labled. When you sit in the seat the light on the instrument light panel will come on and also one of the LED lights should come on. I think when you fasten your seat belt another of the lights will come on. I think when the key is turned on a third light will light but I do not remember about the fourth light. Reconnect your seat switch and go through the process of starting an trying to use the hyd controls and let me know how many and which lights come on and I will look up possible causes for the problem.
The first thing to check is the operate/service switch at the lower front corner of the operator restraint control box on the right side of the seat. It is a small toggle switch. Check that the switch is in the operate position.
If that is in the right position then look at the lower rear corner of the operator restraint control box. You will see a series of 4 small opening which contain LED lights. A mirror might help you see them. I don't remember how they are labled but I think they are labled. When you sit in the seat the light on the instrument light panel will come on and also one of the LED lights should come on. I think when you fasten your seat belt another of the lights will come on. I think when the key is turned on a third light will light but I do not remember about the fourth light. Reconnect your seat switch and go through the process of starting an trying to use the hyd controls and let me know how many and which lights come on and I will look up possible causes for the problem.
Here is the testing sequence for the operators restraint control system. Console lights refer to the light panel on the front right cab pillar and control module lights refer to the lights on the operators restraint module located in the lower rear corner of the module.
Engage the parking brake and lower the boom.
Testing Sequence:
1. Sit in the seat.
• Console seat belt warning light should be on, (light cluster on front pillar).Engage the parking brake and lower the boom.
Testing Sequence:
1. Sit in the seat.
•
Control module SEAT and TIMER diagnostic lights should be ON. If the TIMER diagnosticlight fails to come on, there is no power to the control module from the 6-amp circuit
breaker, the seat switch is not operating, or the seat belt switch is stuck in the closed position.
2. Raise off the seat. The following must happen:
breaker, the seat switch is not operating, or the seat belt switch is stuck in the closed position.
2. Raise off the seat. The following must happen:
•
SEAT light turns OFF. • After two to five seconds, the TIMER lightturns OFF. If the TIMER light does not go off after five seconds, replace the control module.
3. Sit back down and turn the ignition key switch to the ON position.
• Nothing should happen.3. Sit back down and turn the ignition key switch to the ON position.
4. Turn the ignition key to the START position and try starting engine.
•
Engine should not crank or start. • Boom hydraulic circuit should not operate5. Buckle the seat belt.
• Console seat belt warning ligh should go OFF.
Control module SEAT, BELT, and TIMER diagnostic lights should be ON.
6. Turn the ignition key switch to the ON position. • Control module SOL, SEAT, BELT, and
Control module SEAT, BELT, and TIMER diagnostic lights should be ON.
6. Turn the ignition key switch to the ON position. • Control module SOL, SEAT, BELT, and
TIMER diagnostic lights should be ON.
7. Turn the ignition key switch to the START position.
• Control module START, SOL, SEAT, BELT,
TIMER diagnostic lights should be ON.
• Engine should start and operate. • Control module START
light will go OFF when the ignition key is returned to the run position.
light will go OFF when the ignition key is returned to the run position.
•
Boom and bucket hydraulic circuits should operate when controls are moved.
8. Unbuckle the seat belt. • Console seat belt warning light should come ON.
8. Unbuckle the seat belt. • Console seat belt warning light should come ON.
•
Engine should keep operating. • Control module TIMER and SEAT diagnostic
lights should be ON; the SOL and BELT lights should go OFF.
• Boom hydraulic circuit should not
operate. • Bucket hydraulic circuit should still operate.
operate. • Bucket hydraulic circuit should still operate.
9. Buckle the seat belt.
• Console seat belt warning light should go OFF.
•
Control module TIMER, SEAT, BELT, and SOL diagnostic lights should be ON.
•
Boom and bucket hydraulic circuits should operate normally
Thank you for all your help! I looked on the Control module and I have 3 leds that stay on. There are 5 all together. i cannot read the labels. The ones that stay on are numbers 3, 4, and 5. What are these leds? Also the seat belt circuit should be good. as far as the seat sensor goes... i have it jumped out right now. We cannot find the seat. I have the connector attached to the wiring harness jumped out. I was told that there is a certain resistance the module is looking for. Is the resistor in the seat side of the connector or the harness side? Is this my problem?Here is the testing sequence for the operators restraint control system. Console lights refer to the light panel on the front right cab pillar and control module lights refer to the lights on the operators restraint module located in the lower rear corner of the module.
Engage the parking brake and lower the boom.
Testing Sequence:
1. Sit in the seat.
• Console seat belt warning light should be on, (light cluster on front pillar).
•
Control module SEAT and TIMER diagnostic lights should be ON. If the TIMER diagnostic
light fails to come on, there is no power to the control module from the 6-amp circuit
breaker, the seat switch is not operating, or the seat belt switch is stuck in the closed position.
2. Raise off the seat. The following must happen:
•
SEAT light turns OFF. • After two to five seconds, the TIMER light
turns OFF. If the TIMER light does not go off after five seconds, replace the control module.
3. Sit back down and turn the ignition key switch to the ON position.
• Nothing should happen.
4. Turn the ignition key to the START position and try starting engine.
•
Engine should not crank or start. • Boom hydraulic circuit should not operate
5. Buckle the seat belt.
• Console seat belt warning ligh should go OFF.
Control module SEAT, BELT, and TIMER diagnostic lights should be ON.
6. Turn the ignition key switch to the ON position. • Control module SOL, SEAT, BELT, and
TIMER diagnostic lights should be ON.
7. Turn the ignition key switch to the START position.
• Control module START, SOL, SEAT, BELT,
TIMER diagnostic lights should be ON.
• Engine should start and operate. • Control module START
light will go OFF when the ignition key is returned to the run position.
•
Boom and bucket hydraulic circuits should operate when controls are moved.
8. Unbuckle the seat belt. • Console seat belt warning light should come ON.
•
Engine should keep operating. • Control module TIMER and SEAT diagnostic
lights should be ON; the SOL and BELT lights should go OFF.
• Boom hydraulic circuit should not
operate. • Bucket hydraulic circuit should still operate.
9. Buckle the seat belt.
• Console seat belt warning light should go OFF.
•
Control module TIMER, SEAT, BELT, and SOL diagnostic lights should be ON.
•
Boom and bucket hydraulic circuits should operate normally
The resistor is in the seat harness, the harness that connects directly to the seat switches, not the main harness going to the seat and yes that can cause the problem.Thank you for all your help! I looked on the Control module and I have 3 leds that stay on. There are 5 all together. i cannot read the labels. The ones that stay on are numbers 3, 4, and 5. What are these leds? Also the seat belt circuit should be good. as far as the seat sensor goes... i have it jumped out right now. We cannot find the seat. I have the connector attached to the wiring harness jumped out. I was told that there is a certain resistance the module is looking for. Is the resistor in the seat side of the connector or the harness side? Is this my problem?
The lights are from front to back; START SOL SEAT BELT TIMER.The resistor is in the seat harness, the harness that connects directly to the seat switches, not the main harness going to the seat and yes that can cause the problem.
Are you sure the toggle switch is leaning to the back which is the operate mode? The symptoms sound like it is in the service position which will allow you to start and move the hydrastat but the boom and bucket is locked out. Considering that you do not have the correct seat harness and the boom and bucket locked out I am surprised that it would start if the toggle switch is in the operate position. Also the system needs to see things done in a sequence. First the seat switch must be activated and then the seat belt connected. Follow the steps listed in my previous post to see if the lights light in the proper sequence.
Yes toggle is in right position. If i flip it ignition key will not start engine. Do you know by chance what kind of resistance the module is looking for? I have many types of resistors. 1k, 2k, 3k, 5k, 7k...?The lights are from front to back; START SOL SEAT BELT TIMER.
Are you sure the toggle switch is leaning to the back which is the operate mode? The symptoms sound like it is in the service position which will allow you to start and move the hydrastat but the boom and bucket is locked out. Considering that you do not have the correct seat harness and the boom and bucket locked out I am surprised that it would start if the toggle switch is in the operate position. Also the system needs to see things done in a sequence. First the seat switch must be activated and then the seat belt connected. Follow the steps listed in my previous post to see if the lights light in the proper sequence.
Ok we are getting somewhere! I followed your procedure. Only thing i am not getting is the solenoid valve led. Where is this solenoid? This seems to be the problem. You have gotten me so close to victory, I can taste it!Yes toggle is in right position. If i flip it ignition key will not start engine. Do you know by chance what kind of resistance the module is looking for? I have many types of resistors. 1k, 2k, 3k, 5k, 7k...?
I do not know what the resistance should be, but it should lower the voltage by 1.2V to 1.6V. This is one possible cause for the sol light not to come on. Actually the resistor is a diode resister. If you are planning to keep this loader and use it I would get the seat harness with the resistor in it so you know that part of the circuit is not causing you a problem. It is strange that the engine would not start with the toggle switch in the other position. It should start in that position any time since it bypasses the control logic of the operator restraint system. Your starting symptons are just the oposite of what they should be.Ok we are getting somewhere! I followed your procedure. Only thing i am not getting is the solenoid valve led. Where is this solenoid? This seems to be the problem. You have gotten me so close to victory, I can taste it!
Is the solenoid in the engine compartment right side wall under the starter solenoid?I do not know what the resistance should be, but it should lower the voltage by 1.2V to 1.6V. This is one possible cause for the sol light not to come on. Actually the resistor is a diode resister. If you are planning to keep this loader and use it I would get the seat harness with the resistor in it so you know that part of the circuit is not causing you a problem. It is strange that the engine would not start with the toggle switch in the other position. It should start in that position any time since it bypasses the control logic of the operator restraint system. Your starting symptons are just the oposite of what they should be.
There are actually two solenoids, one for the boom circuit and one for the bucket circuit. While they are called solenoids they do not look like the one in the engine compartment. You have a metal block with hydraulic lines going into it and a coil that when energized will allow oil to flow throught the hydraulic lines. When it is not energized you have the situation you have now where none of the cylinders move. Remove the kick panel in the operators compartment and the seat. The bucket solenoid valve is to the left, when looking in from the front, and towards the top of the transmission compartment. You should see the wiring and just follow it to the valve. The boom solenoid valve is to your right bolted to the chain case wall. It will be partially hidden by the hydraulic lines coming off the control valve. It is between the control valve and the chain case wall. To get to it you have to remove the belly pan and fuel tank.Is the solenoid in the engine compartment right side wall under the starter solenoid?
OK... found the bucket solenoid. I took a probe and sent power to it and the bucket moves just fine. What powers the solenoid? Control module or is it getting power from a fuse box? If its a fuse box... where the hell is it? I thought maybe the valve was sticking but now i know the valves are ok.There are actually two solenoids, one for the boom circuit and one for the bucket circuit. While they are called solenoids they do not look like the one in the engine compartment. You have a metal block with hydraulic lines going into it and a coil that when energized will allow oil to flow throught the hydraulic lines. When it is not energized you have the situation you have now where none of the cylinders move. Remove the kick panel in the operators compartment and the seat. The bucket solenoid valve is to the left, when looking in from the front, and towards the top of the transmission compartment. You should see the wiring and just follow it to the valve. The boom solenoid valve is to your right bolted to the chain case wall. It will be partially hidden by the hydraulic lines coming off the control valve. It is between the control valve and the chain case wall. To get to it you have to remove the belly pan and fuel tank.
There is a 6amp circuit breaker on the side wall above and in front of the battery. You will also find a 15amp breaker there and two solenoids, start and preheat. This 6amp circuit breaker supplies power to the operators restraint system which includes seat switch, seat belt, and boom and bucket solenoid valves. The power to the boom and bucket solenoid valves comes out of the operators restraint box on the wall to the right of the seat. Since the power comes from this box you must have the rest of the system functioning, including the right seat switch harness, before it will supply power to the valves. Unfortunately there are no shortcuts. Since you have power to the seat switch and seat belt it is safe to assume the 6amp breaker is ok.OK... found the bucket solenoid. I took a probe and sent power to it and the bucket moves just fine. What powers the solenoid? Control module or is it getting power from a fuse box? If its a fuse box... where the hell is it? I thought maybe the valve was sticking but now i know the valves are ok.
I have gotten the seat, belt and timer led to come on so that means all is ok correct? The only 2 that arent on are the start and solenoid valve led. Start will come on once i turn the key over. There is however a black wire coming from the control module that isn't connected to anything. I cant seem to find the other flying lead from the harness side. Any suggestions?There is a 6amp circuit breaker on the side wall above and in front of the battery. You will also find a 15amp breaker there and two solenoids, start and preheat. This 6amp circuit breaker supplies power to the operators restraint system which includes seat switch, seat belt, and boom and bucket solenoid valves. The power to the boom and bucket solenoid valves comes out of the operators restraint box on the wall to the right of the seat. Since the power comes from this box you must have the rest of the system functioning, including the right seat switch harness, before it will supply power to the valves. Unfortunately there are no shortcuts. Since you have power to the seat switch and seat belt it is safe to assume the 6amp breaker is ok.
Not neccessarily. Here is information taken from a New Holland Service Bulletin concerning the seat switch harness.I have gotten the seat, belt and timer led to come on so that means all is ok correct? The only 2 that arent on are the start and solenoid valve led. Start will come on once i turn the key over. There is however a black wire coming from the control module that isn't connected to anything. I cant seem to find the other flying lead from the harness side. Any suggestions?
#861326 for seats with one switch
#9603938 for seats with two switches
These harnesses have a resistor diode in the
T/W (tan/white) wire to reduce voltage by
1.2-1.6 volts to the control module. This
reduced voltage is sensed as the operator is
sitting in the seat and will allow boom/bucket
functions and engine starting. These
harnesses have a raised area about 2" long
where the resistor diode is placed.
Use of a seat switch bypass or the straight
non-diode seat switch harness in the
restraint-equipped loaders will not allow the
boom/bucket solenoid to function or the
engine to start with the module switch in the
"operate" position. In this situation, the
solenoid light and the start light will not
illuminate when the key switch is "ON" and/or
to the "START" positions.
#9603938 for seats with two switches
These harnesses have a resistor diode in the
T/W (tan/white) wire to reduce voltage by
1.2-1.6 volts to the control module. This
reduced voltage is sensed as the operator is
sitting in the seat and will allow boom/bucket
functions and engine starting. These
harnesses have a raised area about 2" long
where the resistor diode is placed.
Use of a seat switch bypass or the straight
non-diode seat switch harness in the
restraint-equipped loaders will not allow the
boom/bucket solenoid to function or the
engine to start with the module switch in the
"operate" position. In this situation, the
solenoid light and the start light will not
illuminate when the key switch is "ON" and/or
to the "START" positions.
bypassing the seat harness will allow the lights for the seat to light but the module needs to see the voltage drop for the sol light to light.
As for the black wire I do not remember for sure but I think they were grounded next to the module. The black wire is the color for the ground wire. Also the module needs to see a certain sequence before it will allow the engine to start. First the seat switch must be activated, after that the seat belt is buckled then if everything is working it will start.
Thanks Mike10 for this really great post. Either my module is intermittently messing up or I had a low voltage hiccup. I became aware of a probable low voltage situation when I switched to "service mode" on the module and turned the key to start, the start relay would just click and stutter. Also noticed the running lights, which have nothing to do with the module, were not functioning with the key in the on position. Really cleaned the battery cable connections, put a 10 amp charger on the battery, got the volts up to 13.6 steady and now the unit runs just fine. The logic module now does everything you outlined in your post. I'm very careful where I park this beast now. I don't just shut it off in front of the garage door anymore. If I may I would like to ask you what does the "Timer" do concerning the module? What does it time? Thanks rukoHere is the testing sequence for the operators restraint control system. Console lights refer to the light panel on the front right cab pillar and control module lights refer to the lights on the operators restraint module located in the lower rear corner of the module.
Engage the parking brake and lower the boom.
Testing Sequence:
1. Sit in the seat.
• Console seat belt warning light should be on, (light cluster on front pillar).
•
Control module SEAT and TIMER diagnostic lights should be ON. If the TIMER diagnostic
light fails to come on, there is no power to the control module from the 6-amp circuit
breaker, the seat switch is not operating, or the seat belt switch is stuck in the closed position.
2. Raise off the seat. The following must happen:
•
SEAT light turns OFF. • After two to five seconds, the TIMER light
turns OFF. If the TIMER light does not go off after five seconds, replace the control module.
3. Sit back down and turn the ignition key switch to the ON position.
• Nothing should happen.
4. Turn the ignition key to the START position and try starting engine.
•
Engine should not crank or start. • Boom hydraulic circuit should not operate
5. Buckle the seat belt.
• Console seat belt warning ligh should go OFF.
Control module SEAT, BELT, and TIMER diagnostic lights should be ON.
6. Turn the ignition key switch to the ON position. • Control module SOL, SEAT, BELT, and
TIMER diagnostic lights should be ON.
7. Turn the ignition key switch to the START position.
• Control module START, SOL, SEAT, BELT,
TIMER diagnostic lights should be ON.
• Engine should start and operate. • Control module START
light will go OFF when the ignition key is returned to the run position.
•
Boom and bucket hydraulic circuits should operate when controls are moved.
8. Unbuckle the seat belt. • Console seat belt warning light should come ON.
•
Engine should keep operating. • Control module TIMER and SEAT diagnostic
lights should be ON; the SOL and BELT lights should go OFF.
• Boom hydraulic circuit should not
operate. • Bucket hydraulic circuit should still operate.
9. Buckle the seat belt.
• Console seat belt warning light should go OFF.
•
Control module TIMER, SEAT, BELT, and SOL diagnostic lights should be ON.
•
Boom and bucket hydraulic circuits should operate normally
HELP! PLEASE! SAME ISSUE! I realize this is an older thread, but I have a 1990 L555 Deluxe with almost the same issue,... I can start her up, and everything seems to work fine, but I only get few operations of either the boom or bucket before the SOL LED light on the control module goes out. If I shut if machine off completely, and re-start, I can get a few more boom or bucket operations before it goes out again. I thought I checked the seat switch diode/resistor, and it was only dropping from 12.8 to 12.3, so I purchased and installed a new one,... but it seems I'm still having same issue. Then I saw the little note in the last post here, about 13.6V? Is there a post I missed about voltage requirements? What is correct voltage for this to operate properly? THANK YOU SO MUCH for ANY HElP!Thanks Mike10 for this really great post. Either my module is intermittently messing up or I had a low voltage hiccup. I became aware of a probable low voltage situation when I switched to "service mode" on the module and turned the key to start, the start relay would just click and stutter. Also noticed the running lights, which have nothing to do with the module, were not functioning with the key in the on position. Really cleaned the battery cable connections, put a 10 amp charger on the battery, got the volts up to 13.6 steady and now the unit runs just fine. The logic module now does everything you outlined in your post. I'm very careful where I park this beast now. I don't just shut it off in front of the garage door anymore. If I may I would like to ask you what does the "Timer" do concerning the module? What does it time? Thanks ruko
Could it be low/bad battery? The battery is only a year old, and I keep it on a battery tender all the time,...HELP! PLEASE! SAME ISSUE! I realize this is an older thread, but I have a 1990 L555 Deluxe with almost the same issue,... I can start her up, and everything seems to work fine, but I only get few operations of either the boom or bucket before the SOL LED light on the control module goes out. If I shut if machine off completely, and re-start, I can get a few more boom or bucket operations before it goes out again. I thought I checked the seat switch diode/resistor, and it was only dropping from 12.8 to 12.3, so I purchased and installed a new one,... but it seems I'm still having same issue. Then I saw the little note in the last post here, about 13.6V? Is there a post I missed about voltage requirements? What is correct voltage for this to operate properly? THANK YOU SO MUCH for ANY HElP!
If you shut down then restart, i can't see it being a bad battery. A bad battery, i'd think would be hard starting, if at all.Could it be low/bad battery? The battery is only a year old, and I keep it on a battery tender all the time,...
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