CharlieSinVT
New member
- Joined
- Apr 15, 2010
- Messages
- 5
Hi,
Greetings everyone. I have a couple of year old John Deere 1026R sub compact that I use to mow the lawn and move dirt/rocks/snow around (FEL/rear blade).
I have a problem I could use some help on. The mower (PTO) stopped in the middle of mowing the lawn. Not good.
The engine continued to run and the hydraulics still work fine (can lift and lower both the mower deck and the 3-point hitch). I took all the plastic off and tried to troubleshoot what I could. There is no indication of damaged wires, all of the connections are good, the fuses and relays are all good. The mower blades turn freely. All of the safety interlocks that I can remember seem to work fine (won't start in gear, seat occupancy, PTO engaged - PtOON, NeutOF error message - either won't start or kills the engine).
The PTO engagement switch works fine, when I pull the switch up the PTO light turns orange on the instrument cluster, a solenoid clicks on the injection pump on the side of the engine, but the PTO doesn't engage (no movement on the PTO output shaft). There aren't any obvious connectors or fuses in the harness between the console and the proportional hydraulic valve.
I don't know what voltage I should see at the two wire plug that goes into the Elec-Hyd Proportional Valve (part number LVA15556 - #12 on the diagram below) when it is off? When it is on? What resistance I should be seeing between the terminals on a working Elec-Hyd Proportional Valve? Should it have continuity when "off"?
I'm not great with electrical stuff, but I sort of know some of the basics (I think). I tested the voltage at the plug to this solenoid/valve. When the PTO is off, the static reading is 176.5 mV. When I turn on the PTO switch in the first few seconds it climbs from 4.02 v to 7.57 v and then drops off to a steady 177.2 mV. The resistance on the proportional valve seems to read 181 k ohms and there isn't any continuity (OL on my multimeter).
It seems odd that the voltage is the same when it is off as when it is on (after the initial spike to 7.5v). This suggests to me that something is wrong electrically, but there doesn't seem to be much to go wrong - unless there is something in the console computer that is wonky. Is there anything else in the circuit I could check?
Could I apply voltage to the solenoid to engage it - what voltage (12v?) and which wire is +/- (I think it has a purple wire and a brown wire guessing brown is negative) - to test it's function out?
Forgot to mention that the hydraulic fluid and engine oil are at the proper level. The air filters are clean. Coolant is a tad below the low cold line (probably should add some coolant, but I can't see how that would relate to this).
Am I missing anything obvious?
Thanks in advance for anything you can tell me.
Charlie
Hydraulic electric solenoid diagram
Greetings everyone. I have a couple of year old John Deere 1026R sub compact that I use to mow the lawn and move dirt/rocks/snow around (FEL/rear blade).
I have a problem I could use some help on. The mower (PTO) stopped in the middle of mowing the lawn. Not good.
The engine continued to run and the hydraulics still work fine (can lift and lower both the mower deck and the 3-point hitch). I took all the plastic off and tried to troubleshoot what I could. There is no indication of damaged wires, all of the connections are good, the fuses and relays are all good. The mower blades turn freely. All of the safety interlocks that I can remember seem to work fine (won't start in gear, seat occupancy, PTO engaged - PtOON, NeutOF error message - either won't start or kills the engine).
The PTO engagement switch works fine, when I pull the switch up the PTO light turns orange on the instrument cluster, a solenoid clicks on the injection pump on the side of the engine, but the PTO doesn't engage (no movement on the PTO output shaft). There aren't any obvious connectors or fuses in the harness between the console and the proportional hydraulic valve.
I don't know what voltage I should see at the two wire plug that goes into the Elec-Hyd Proportional Valve (part number LVA15556 - #12 on the diagram below) when it is off? When it is on? What resistance I should be seeing between the terminals on a working Elec-Hyd Proportional Valve? Should it have continuity when "off"?
I'm not great with electrical stuff, but I sort of know some of the basics (I think). I tested the voltage at the plug to this solenoid/valve. When the PTO is off, the static reading is 176.5 mV. When I turn on the PTO switch in the first few seconds it climbs from 4.02 v to 7.57 v and then drops off to a steady 177.2 mV. The resistance on the proportional valve seems to read 181 k ohms and there isn't any continuity (OL on my multimeter).
It seems odd that the voltage is the same when it is off as when it is on (after the initial spike to 7.5v). This suggests to me that something is wrong electrically, but there doesn't seem to be much to go wrong - unless there is something in the console computer that is wonky. Is there anything else in the circuit I could check?
Could I apply voltage to the solenoid to engage it - what voltage (12v?) and which wire is +/- (I think it has a purple wire and a brown wire guessing brown is negative) - to test it's function out?
Forgot to mention that the hydraulic fluid and engine oil are at the proper level. The air filters are clean. Coolant is a tad below the low cold line (probably should add some coolant, but I can't see how that would relate to this).
Am I missing anything obvious?
Thanks in advance for anything you can tell me.
Charlie
Hydraulic electric solenoid diagram
