01 01 Checking Clutch Booster Circuit; Checking Accumulator; Checking Valve (Pressure−Regulating Valve) - Porsche 996 TT Repair Manual

30 01 01 Checking clutch booster circuit

Caution

1. Checking accumulator

2. Checking valve (pressure−regulating valve)
CAUTION
Danger of material damage if the wrong fluid is used for the clutch hydraulic system!
Danger of damage to property if too much Pentosin CHF 11 S is filled or if Pentosin comes into contact with
the coolant hoses when topping up or filling in!
• Fill Pentosin CHF 11 S only into the supply tanks!
• To prevent overfilling and, therefore, overflowing, check the specifications in the clutch, fluid levels
description and observe them without fail!
• Multiple steering operations (manoeuvring) and/or actuating the clutch with the engine switched off
change the fluid level in the engine−compartment reservoir! Fluid level rises. In this case, the engine
must be run for approx. 20 seconds immediately prior to the fluid level check!
If coolant hoses come into contact with Pentosin, thoroughly clean them with water
•
IMMEDIATELY!
• Replace visibly swollen coolant hoses!
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1. Checking accumulator
1. Cold start engine (accumulator temperature approx. 20°C) and let run for approx. 20 seconds
(accumulator is full).
2. With the engine switched off, depress the clutch pedal repeatedly until an abrupt rise in pedal resistance
against your foot can be felt (accumulator is empty). While doing this, count the number of depressions
carried out up to the point of the rise in pedal pressure!
3. If the number of times the pedal was depressed is over 35, the accumulator is −arrow− faulty and must be
replaced! => Removing and installing the accumulator
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2. Checking valve (pressure−regulating valve)
Note

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