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How do I bleed a hydrolytic clutch on a 1989 Nissan d21 truck 4x4

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There is a bleed valve on the slave cylinder that is on the transmission bell housing. Use an 8 or 10 mm wrench and loosen the valve, then snug it just hand tight. Now have someone depress the clutch pedal. As the pedal is depressed, loosen the bleeder and let air or fluid out. Close the valve as the pedal hits the floor, then repeat until a steady stream of brake fluid comes out of the bleeder as the clutch is depressed.

In many cases, the hydraulic clutch will gravity bleed when the bleeder valve is open. This is especially true if the fluid line from the clutch master cylinder (on the firewall) down to the slave cylinder is not bent up or around any objects, but is pretty much a straight drop down to the slave cylinder. If it won't gravity bleed by just opening the valve, have a helper work the clutch pedal as described. Remember to close the bleeder before letting the pedal up, so that air won't be sucked back in through the bleeder valve.

Posted on Apr 26, 2015


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I have a 94 d21 Nissan and it sounds like its going into gear but will not pull at all why

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New clutch installed. No pedal, stays on floor unless I bring it back up with my hand. No resistance.

`Did it bleed, did fluid come out in a steady stream? Isn't there a spring to bring the pedal off the floor?
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