BRAKE SYSTEM

P-14prose procedure

Loaded condition

1
Start the engine.
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2
Depress the brake pedal with a force of 196 N (20 kg, 44 lb).
3
With the brake pedal depressed, stop the engine when the vacuum gauge indicates 500 mmHg (19.7 inHg).
4
Observe the vacuum gauge for 15 seconds. If the gauge indicates 475—500 mmHg (18.7—19.7 inHg), the unit is operating.

b) Checking for hydraulic pressure

1. If with the engine stopped (vacuum 0 mmHg [0 inHg]) the fluid pressure is within specification, the unit is operating.

Hydraulic pressure — engine stopped (vacuum 0 mmHg)

Pedal force	Fluid pressure
196 N (20 kg, 44 lb)	1,079—1,177 kPa (11—12 kg/cm², 156—171 psi)

196 N (20 kg, 44 lb)

Fluid pressure1,079—1,177 kPa (11—12 kg/cm², 156—171 psi)

2. Start the engine. Depress the brake pedal when the vacuum reaches 500 mmHg (19.7 inHg). If the fluid pressure is within specification, the unit is operating.

Hydraulic pressure — engine running (vacuum 500 mmHg)

Pedal force	Fluid pressure
196 N (20 kg, 44 lb)	5,199—5,494 kPa (53—56 kg/cm², 754—796 psi)

196 N (20 kg, 44 lb)

Fluid pressure5,199—5,494 kPa (53—56 kg/cm², 754—796 psi)

Inspection of check valve

NOTE

The check valve is pressed into the vacuum hose. There is an arrow on the hose to indicate direction of hose installation.

Inspection

Check valve inspection

1
Disconnect the vacuum hose from the engine.
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2
Apply suction and pressure to the hose from the engine side. Verify that air flows only toward the engine. If the air passes in both directions or not at all, replace the vacuum hose (along with the check valve).

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