Nissan 47210-1W300 Booster Assy-Brake

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To replace the power brake booster, follow these steps: Remove the brake master cylinder. Disconnect the vacuum hose leading from the engine to the booster. Remove the under-dash panel. Remove the clevis pin retaining clip with pliers and pull out the clevis pin. Remove the four nuts holding the brake booster to the firewall. Slide the booster straight out from the firewall until the studs clear the holes. Measure the distance between the power brake booster and the hole in the clevis and compare it to the specified booster-to-clevis dimension. If the measurement isn't the same, loosen the adjusting nut and turn the clevis in or out to achieve the specified length. Then, tighten the nut.

The parking brake can be checked by parking the vehicle on a steep hill with the parking brake set and the transmission in Neutral. If the parking brake cannot prevent the vehicle from rolling, it needs adjustment.