What to do if your hydrostatic system has no charge?
If there is no charge pressure at any position of the control lever, the charge pump is probably at fault. Suspect a broken drive shaft or coupling to the charge pump. To confirm the diagnosis, remove the charge pump cover and inspect for broken parts.
What to do if your hydraulics line is not working?
Change to oil with lower viscosity or better viscosity index and lower pour point. An immersion heater placed in the oil may help under severe cold conditions. 4. Control line may be too small, or metering choke valve not working properly. 5. Repair or replace worn parts and loose packing. Check oil to see that viscosity is not too low.
How can I tell if my hydrostatic system is working?
Install a low range gauge in one of the specified ports where this pressure can be measured. These gauging ports will have to be determined from a service drawing of the pump or motor. On a system which is working correctly, the charge pressure will hold steady, with little fluctuation, while the control lever on the pump is in center neutral.
What to do if your closed loop hydrostatic system is stuck?
If there is little or no rise in loop pressure when the control lever is moved out of neutral, one of the high pressure relief valves (usually located in the motor rear cover) may be stuck or damaged. Since there are two high pressure relief valves, one for each direction of operation, try moving the lever to both forward and reverse.
What happens when there is no heat in a hydronic system?
Remember, all the flow in a hydronic system is going from the discharge of some circulator back to its suction. The water is lazy and it’s looking for the shortcut. If there’s no heat and purging doesn’t work, start thinking about resistance to flow because where there is no flow there is no heat.
What does no flow mean in a hydronic system?
No flow means no heat, and it looks exactly like an air problem. Don’t be fooled, though. If you’re purging and not getting any air, it’s not an air problem. So yes, if you give it a path it will take it. There’s no question about that.
What’s the key to troubleshooting hydronic systems?
It’s key to troubleshooting hydronic systems. The same goes for those circuits that won’t heat. Most contractors immediately think the problem is air so they start purging. But then the no-heat problem returns. Guess what they do next? They purge some more. The same problem returns. They keep purging. They’re wrong, but relentless.
Why are the headers short in a hydronic system?
By keeping the headers short and generously sized, the pressure drop along the header is very low. This in combination with the very low pressure drop through the hydraulic separator provides good hydraulic separation of all the circulators in the system.
