The Hydraulic Boost Pump and Accumulator store pressure for use in the braking system....

Consider the system in 2 halves - Pressure Storage Side and Brake Components Side - seperated by a valve (the Brake Pedal)...

When you press the brake pedal this allows pressure stored in the Accumulator to boost the Hydraulic Pressure required to activate the brakes, when you come off the Brake pedal, it vents this pressure back to the Fluid Reservoir, and closes off the Boost circuit....

When Accumulator pressure drops, the Hydraulic Boo5st Pump runs to recharge the Accumulator Pressure.

Unfortunatly, if the pump dies or the accumulator gets weak, braking efficency is greatly reduced.

Grit Valves description is wrong, the boost pump does not circulate through the braking system constantly and as such cannot be used to bleed the brakes....you will need to activate the brake pedal to allow fluid to flow....else, as you say, the brakes would be on constantly from the Pump pressure!

Thanks, that's exactly how I'd expect a "power brake" system to work.
 
so who wants to come and fix the brakes for me???

dunno when im gonna get the chance to do the odd jobs as im so bloody busy with the kids, work, birthdays, weddings, the playoff final (up the 'orns) holidays etc. non stop till end of june now!

my fave colour on a p38. counting myself lucky as i got the colour i wanted, the interior colour i wanted and the wheels i wanted lol.
 
Do a quick check...

With engine running, open the bonnet....allow the Boost Pump to build pressure and switch itself off...

Still with the engine runnng, press the brake Pedal and release - repeat until the boost pump runs again....count the pedal presses inbetween pump running....3-5 is usual, less than 3 the accumulator is tired and on its way out....

Changing the accumulator is simple....follow RAVE, first is to depressurise the braking system....engine off, press brake pedal fully 30 odd times, then follow RAVE to replace accumulator....I think it just unscrews IIRC But again - check RAVE!
 
gonna make a start on the cosmetics tomorrow! jobs to do are a leather repair on the bolster and clean the front seats, possibly also re colour the steering wheel as th dye has rubbed off.

also gonna rip the bloody tow bar off and re paint the grille, cant decide whether to just matt black it or lacquer it?
 
Just black or if like me you want to freshen it a tiny bit, gloss black with a stripe of matte silver edging the front of each slat. Painter made a mistake, I asked him to paint it black first, then mask the front of the slats and paint it silver so the silver would only subtly show from between the slats. Instead he actually made his job harder by carefully painting stripes by hand so I didn't have the heart to complain. Still, brightened it up nicely without going over the top. Will take a pic for you.
 
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Yeah ok, was considering dropping a bit of red pearl over the top as well, thought it might look nbice against the red paint. Might have a play later
 
Did mine yesterday and just went for a plain satin black finish
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they are the 19inch rr sport wheels. look **** on the sports but suit the p38 well! done the grille today and got the tow bar off. nearly lost a finger though lol. the bolts were tight!!
 

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Looks great! I like the colour coded bumper as well, do you think it would be possible to paint the standard matt black one and have it come up shiny like yours?
 
they are the 19inch rr sport wheels. look **** on the sports but suit the p38 well! done the grille today and got the tow bar off. nearly lost a finger though lol. the bolts were tight!!


You still running it on the other guy's plates? I thought you said the original owner was transferring them? If he has you're breaking the law running on those, you'll have to wait for docs for new (old) plates) and get them on it.
 
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na its ok, all in hand! he didnt have a chance to transfer them, son in hospital etc. waiting for paperwork, and as soon as it comes through ill swap them.
 
na its ok, all in hand! he didnt have a chance to transfer them, son in hospital etc. waiting for paperwork, and as soon as it comes through ill swap them.


Ah right. Just check with him that he hasn't applied in the meantime. When I bought mine I couldn't run the veh for over a week, waiting for the transfer confirmation. Although mine was going the other way, from original plates to my plate. My ex certainly landed me with the gift that keeps on costing. Every time I change veh I have to pay for the transfer :lol:
 
well i dont use it day to day anway, only at weekends really as i have a van for work. should bhave original plates on it for the weekend
 

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