LOF replacement clutch issues

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Wizzlon
Posts: 29
Joined: Sat May 25, 2019 6:39 pm

LOF replacement clutch issues

Post by Wizzlon » Sat Apr 25, 2026 6:24 pm

Hi,

Nearly sold my 1979 LW due to arthritis in the left ankle making things difficult, then I decided to have a go with a LOF Powermaster master cylinder. Not a difficult job to fit, but gear selection was somewhat stiff, as if there wasn't quite enough travel at the servo. Further bleeding has resulted in disaster- I can't select any gear with the engine running;there is no resistance at the pedal. I Used a jar and a close fitting pipe, nipping off with the pedal depressed and also tried with a cheapo vacuum pump. I have used Comma DOT4 fluid (synthetic). What am I missing?

DormyLtWt
Posts: 67
Joined: Thu Jul 18, 2024 9:12 am
Location: Nr. Norwich

Re: LOF replacement clutch issues

Post by DormyLtWt » Sat Apr 25, 2026 8:45 pm

You may have a bleed problem if you cant get any pressure at the pedal or perhaps a failed master cyl. I don't know the exact detail of the Powermaster.

The only way to reduce the clutchpedal push without extra servo assistance is to use a smaller diameter master cylinder, which I think is how the Powermaster maybe works. So your conclusion that there wasn't enough travel at the 'servo' isn't unreasonable.

You mention 'servo', does your clutch already have a servo fitted into the clutch system (not unheard of - there are kits) or what do you mean buy 'servo' ?

The hydraulic cylinder down on the gearbox which operates the clutch is known as the clutch slave cylinder.
"I'm sorry for the man who hears the pipes, and who wisnae born in Scotland."

Wizzlon
Posts: 29
Joined: Sat May 25, 2019 6:39 pm

Re: LOF replacement clutch issues

Post by Wizzlon » Sun Apr 26, 2026 9:43 am

Yes, apologies, I mean the slave.

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