what is a clutch accumulator for??HZJ77

[simonliew]

Hi,
any one know what is the purpose of the device called clutch accumulator that sits on top of the clutch master cylinder on a HZJ77,the line go from the master to the accumulator and then out to the slave.
can l bypass it??
TIA
Simon Liew
TLC winnipeg

 

[Clint79]

any pics? its not what they put on some 60 series as well to make the clutch pedal lighter?

 

[simonliew]

l don't have picsnow,can get later today.

 

[Tinman]

Is that the square thing at the end of the master cylinder. If it is what I think it is it is suppost to dampen the clutch operation reducing any shuddering.

 

[Japan4X4]

It accumulates!

Hydraulic accumulator - Wikipedia, the free encyclopedia

 

[simonliew]

it is bolted to the 2 bolts of the master cyl with a bracket,sits on top of the master,l installed a turbo and intercooler so the accumulator is in the way,l removed it and l will testdrive in the next few days to see how the clutch feels without the accumulator.

 

[wongtsenhin]

Simon,
How is the clutch without the accumulator?
I'm about to eliminate this but there must a purpose for this thing. I'm in dilemma. ? ?
My clutch tends to go higher and higher as I depress for engagement. Seems like the fluid is not returning to the reservoir as before and encounter slippage in 4 and 5 gear on flat land.
I'm fully confident this accumulator must be the culprit.

 

[roscoFJ73]

I found this on the 4x4 community ZA on the toyota page. If its the problem , I would replace it rather than remove it.

Accumulators rely on the action of a piston or a valve to delay the delivery of high pressure to a clutch or band. An accumulator works like a shock absorber and cushions the application of servos and disc packs. An accumulator cushions sudden increases in hydraulic pressure by temporarily diverting some of the apply fluid into a parallel circuit or chamber. This allows the pressure to gradually increase and provides for smooth engagement of a brake or clutch

It seems most Toyotas have them now.

 

[wongtsenhin]

Thanks! Rosco.
I bought the repair kit.

 

[simonliew]

the clutch works find without the accumulator.

 

[wongtsenhin]

Thanks! Simon.

 

[clintnz]

the clutch works find without the accumulator.

Yep. Mine was leaking so I removed it. Didn't notice any difference. Bit bigger clutch than mine on some cruisers though so YMMV.

Cheers
Clint

 

[1992HZJ77]

FYI, when I bypassed my clutch accumulator while waiting for part from Japan, all I needed was an M10 1mm thread female to female brass coupler with a 20mm depth; I removed piping from clutch accumulator, loosened existing pipe coming out below reservoir of clutch Master Cylinder and tilted back a bit towards radiator, gave the tube a tweak to line up with brass coupler and then gave the other tube a tweak at top of brass coupler to line them up, then fastened them into brass coupler and then tightened the one for tilting back towards radiator.