Hardinge HLV_H Brake, spring?

lasterixsuedois · Jun 29, 2021

Hi,
I have got myself an old KL1 (HLV H).
The brake was disconnected and disengaged.
Now the solenoid seems to work but are buzzing a lot.
But if the solenoid pulls the lever to disengage the brake then it should have a spring that applies the brake?
My brake has no spring anywhere it's just "loose".
Where is the spring supposed to be mounted?

BR
Patrick

Billtodd · Jun 29, 2021

The spring it trapped between the lever and the coil cover box. There should be a raised boss on the lever lust behind the solenoid. the spring presses on to the boss.

The spring is about 25 diameter 30-40 long with wire about 2 to 2.5 diameter. Not super strong .

Check the solenoid closely for cracks in the copper shorts . This is the main reason for the buzzing.

lasterixsuedois · Jun 30, 2021

Thank's Bill!
Ok, I will start looking into the solenoid and what spring force I might need.

BR
Patrick

EHirst · Jul 1, 2021

Brake spring

I had the same problem. I purchased at outrageous cost a replacement spring from Hardinge because I had no idea of the size needed.

Here are some pictures (if they work!):

View attachment 323842
View attachment 323843

I repaired the solenoid following Bill Todd's advice - fitting two new copper loops. This almost eliminated the noise and vibration. I filed things down a bit t give better contact, maybe I should have done more.

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Hardinge HLV_H Brake, spring?

lasterixsuedois

Plastic

Billtodd

Titanium

lasterixsuedois

Plastic

EHirst

Plastic

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