Powertune servo
Posted: Fri Jun 26, 2015 4:33 pm
In September last year,I bought a Powertune RLE 10117 servo from mgservicesheathrow ,via ebay.
This was part of a parts package for a restoration of my '68 plus 2.
Having got the car back running last month,I found the brakes felt odd on the road.....spongy feel on first press,followed by harsh braking on second press.
After a lot of head scratching,I have, with specialist help,
discovered the source of the problem.
On dismantling the air control valve assembly,mounted on the side of the servo body,the last item to come out is a plunger with a rubber O ring approx 1/4" diameter on it.
The existing O ring was too big, causing the plunger to stick in the bore.This affected the proper operation of the servo.
The O ring was replaced with a correct sized smaller one,and all is now ok.
I did contact the ebay seller, mgservicesheathrow, and he responded that he had sold many of these servos,and had not had this problem reported.
Hope this is useful to someone?
Dave
This was part of a parts package for a restoration of my '68 plus 2.
Having got the car back running last month,I found the brakes felt odd on the road.....spongy feel on first press,followed by harsh braking on second press.
After a lot of head scratching,I have, with specialist help,
discovered the source of the problem.
On dismantling the air control valve assembly,mounted on the side of the servo body,the last item to come out is a plunger with a rubber O ring approx 1/4" diameter on it.
The existing O ring was too big, causing the plunger to stick in the bore.This affected the proper operation of the servo.
The O ring was replaced with a correct sized smaller one,and all is now ok.
I did contact the ebay seller, mgservicesheathrow, and he responded that he had sold many of these servos,and had not had this problem reported.
Hope this is useful to someone?
Dave