Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Power Brake Assist: Testing and Inspection

Accumulator - Hydro-Boost(R)
1. Start the engine and allow it to run for at least 5 minutes.
2. Stop the engine.
3. Apply the brakes. The accumulator in the Hydro-Boost(R) brake booster should retain enough pressure for at least 2 power assisted brake operations.
^ If no power assist is felt, install a new Hydro-Boost(R) brake booster.
^ If power assist is felt, the accumulator is operating correctly at this time.