Pump 4 still ok. After some research when/if pump 4 gives up I will look at the brake booster pump. I understand that a crook one can put too much stress on the vacuum pump.
landychris
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Pump 4 still ok. After some research when/if pump 4 gives up I will look at the brake booster pump. I understand that a crook one can put too much stress on the vacuum pump.
landychris
I was blaming my 300TDi pump, but I decided to change the brake vacuum servo unit instead and by doing this the fault has now been cleared.
To find out why I had a intermittent hard pedal with poor stopping ability, I dismantled the servo to find that there is a lubricant around the servo push rod seal, this lubricant and the seal had gone hard with age and was allowing the vacuum to the diaphragm to be diminished by air being drawn past the push rod.
I haven't found a kit to refurbish these servo's yet, so if anyone knows where to find such a kit, could they record the link on here please?
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Paddocks have seal kits.
18G8951L - Seal kit for STC2878
18G8951L | Seal kit for STC2878
AEU2741 - Seal kit for NRC4772
AEU2741 | Seal kit for NRC4772
Thanks jboot51 for that link.Quote:
Originally Posted by jboot51
Those kit's don't have the diaphragm shown nor the lubricant.
The lubricant I found in my faulty servo looked to be a zinc oxide based rubber grease and the diaphragm's would need replacing occasionally as they can develop cracks.
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