HR80/91/92 Baseplate pin fault?
Posted: Tue Feb 07, 2023 5:59 pm
Following on from hot summer 'evets' (as they call them these days) I have had 4 or 5 controllers HR80 & HR91/92
come up with operating faults that seem to be related. I find the baseplate actuator pin is loose in the centre bush.
Consequently the demand is not met as the actuator pin slips in the adaptor bush during valve operation.
I have checked a few good ones and find them tight/fixed(?). I didn't push too hard to avoid adding another to the pile.
My question is....should the valve baseplate pins be a) tight fixed or b) an interference fit ?
An interference fit would provide a "clutch fail safe" should the final rad valve fail fully open.
Repositioning and supergluing the pin would restore a fixed mode (a) but at the risk of loosing a clutch failsafe.
Anybody else with a similar problem?
New valve baseplate adaptors (50064648-001) seem to be out of stock everywhere these days.
come up with operating faults that seem to be related. I find the baseplate actuator pin is loose in the centre bush.
Consequently the demand is not met as the actuator pin slips in the adaptor bush during valve operation.
I have checked a few good ones and find them tight/fixed(?). I didn't push too hard to avoid adding another to the pile.
My question is....should the valve baseplate pins be a) tight fixed or b) an interference fit ?
An interference fit would provide a "clutch fail safe" should the final rad valve fail fully open.
Repositioning and supergluing the pin would restore a fixed mode (a) but at the risk of loosing a clutch failsafe.
Anybody else with a similar problem?
New valve baseplate adaptors (50064648-001) seem to be out of stock everywhere these days.