Text preview for : M34c Power Booster.pdf part of Daewoo Matiz Service Manual, Wiring Diagram - 16 Part File - 62 File
Back to : 796cc (My 2003).part01.ra | Home
SECTION 4C
POWER BOOSTER
TABLE OF CONTENTS
Description and Operation . . . . . . . . . . . . . . . . . . Power Booster . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostic Information and Procedures . . . . . Power Booster Functional Check . . . . . . . . . . . . 4C-2 4C-2 4C-3 4C-3 On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . . . . . . Vacuum Hose and Check Valve . . . . . . . . . . . . . Power Booster Assembly . . . . . . . . . . . . . . . . . . . Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4C-4 4C-4 4C-5 4C-8
Check Valve Functional Check . . . . . . . . . . . . . . 4C-3 Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . . 4C-4
General Specifications . . . . . . . . . . . . . . . . . . . . . 4C-8 Fastener Tightening Specifications . . . . . . . . . . . 4C-8
DAEWOO M-150 BL2
4C ญ 2 POWER BOOSTER
DESCRIPTION AND OPERATION
POWER BOOSTER
This booster is a single diaphragm, vacuum-suspended unit. In a normal operating mode, with the service brakes in the release position, a vacuum-suspended booster operates with a vacuum on both sides of its diaphragm. When the brakes are applied, air at atmospheric pressure is admitted to one side of the diaphragm to provide the power assist. When the brakes are released, atmospheric air is shut off from that side of the diaphragm. The air is then drawn from the booster through the vacuum check valve by the vacuum source. Important: If any hydraulic component is removed or disconnected, it may be necessary to bleed all or part of the brake system.
DAEWOO M-150 BL2
POWER BOOSTER 4C ญ 3
DIAGNOSTIC INFORMATION AND PROCEDURES
POWER BOOSTER FUNCTIONAL CHECK
1. With the engine stopped, eliminate the vacuum in the booster by pumping the brake pedal several times. 2. Push the pedal down and hold it in this position. 3. Start the engine. 4. The booster is OK if the pedal drops further because of extra force produced. If the brake pedal does not drop, the vacuum system (vacuum hoses, check valve, etc.) is probably defective and should be checked. If no defect is revealed by checking the vacuum system, the defect is in the booster itself. only sucked, the check valve OK.
CHECK VALVE FUNCTIONAL CHECK
1. Remove the vacuum hose. 2. Suck the vacuum hose to power booster. And also, suck the vacuum hose to engine. 3. If the air pass through the check valve or not, replace the check valve. And if the vacuum hose to engine is
D17A301B
DAEWOO M-150 BL2
4C ญ 4 POWER BOOSTER
REPAIR INSTRUCTIONS ONญVEHICLE SERVICE
VACUUM HOSE AND CHECK VALVE
Removal Procedure
1. Remove the vacuum hose. D Disconnect the vacuum hose from the intake manifold (1).
D107A501
D Disconnect the vacuum hose from the power booster (2).
D17A502A
Installation Procedure
1. Connect the vacuum hose to the power booster. 2. Connect the vacuum hose to the intake manifold.
D107A503
DAEWOO M-150 BL2
POWER BOOSTER 4C ญ 5
POWER BOOSTER ASSEMBLY (LEFTญHAND DRIVE)
Removal Procedure
1. Remove the master cylinder assembly. Refer to Section 4B, Master Cylinder. 2. Disconnect the vacuum hose from the power booster. 3. Remove the power booster. D Straighten the cotter pin and remove it (1). D Remove the clevis pin (2).
D107A519
D Remove the nuts (3).
D107A520
D Remove the power booster (4).
D107A521
Installation Procedure
1. Install the power booster with the new cotter pin, clevis pin and nuts.
Tighten
Tighten the nuts to 16 NSm (12 lb-ft). Important: Make sure the distance from the booster to the center of the clevis bore should be 100mm (3.94 in.). 2. Install the master cylinder assembly. Refer to Section 4B, Master Cylinder. 3. Connect the vacuum hose to the power booster. 4. Bleed the brake system. Refer to Section 4A, Hydraulic Brakes.
D17A522A
DAEWOO M-150 BL2
4C ญ 6 POWER BOOSTER
POWER BOOSTER ASSEMBLY (RIGHTญHAND DRIVE)
Removal Procedure
1. Remove the master cylinder assembly. Refer to Section 4B, Master Cylinder. 2. Disconnect the vacuum hose from the power booster. 3. Remove the instrument panel assembly. Refer to Section 9E, Instrument/Driver Information. 4. Remove the evaporator unit mounting screws and take off the evaporator unit a little. Refer to Section 7B, Manual Control Heating, Ventilation, and Air Conditioning System. 5. Remove the power booster. D Straighten the cotter pin and remove it (1). D Remove the clevis pin (2).
D24C001
D Remove the nuts (3).
D24C002
D Remove the power booster (4).
D107A521
DAEWOO M-150 BL2
POWER BOOSTER 4C ญ 7 Installation Procedure
1. Install the power booster with the new cotter pin, clevis pin and nuts.
Tighten
Tighten the nuts to 16 NSm (12 lb-ft). Important: Make sure the distance from the booster to the center of the clevis bore should be 100mm (3.94 in.). Install the evaporator unit with the screws. Refer to Section 7B, Manual Control Heating, Ventilation, and Air Conditioning System. Install the instrument panel assembly. Refer to Section 9E, Instrument/Driver Information. Connect the vacuum hose to the power booster. Install the master cylinder assembly. Refer to Section 4B, Master Cylinder.
2.
D24C003
3. 4. 5.
DAEWOO M-150 BL2
มมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมม ม ม ม มมมมมมม ม ม มมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมม ม ม ม ม มมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมม ม ม ม ม ม มมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมม มมมมมมมมมมมม ม ม ม ม ม มมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมม มมมมมมมมมมมมมมมมมมมมมมมมมมมมม มมมมมมมมมมมมมมมมมมมมมมมม
Master Cylinder Attaching Nuts Boosterญto-Dash Panel Nuts Power Booster Application
มมมมมมมมม ม มมมมมมมมมมมมม มมมมมมมมมมมมมมมมมม ม มมมมมมมมม มมมมมมมมมมมมม มมมมมมมมมมมมม ม มมมมมมมมมมมมมมมมมม ม ม มมมมมมมมมมมมม มมมมมมมมมมมมมมมมมม มมมมมมมมม มมมมมมมมมมมมม มมมมมมมมมม ม มมมมมมมมมมมมม มมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมม ม มมมมมมมมมมมมมมมมมม มมมมมมมมมมมมมมมมมม มมมมมมมมม มมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมมม ม ม
4C ญ 8 POWER BOOSTER
Application
FASTENER TIGHTENING SPECIFICATIONS
Distance from the booster to the center of the clevis bore
Servo Force Ratio
Diameter
Type
GENERAL SPECIFICATIONS
SPECIFICATIONS
mm (inch)
mm (inch)
Unit
NSm
ญ
ญ
16
16
Lb-Ft
VacuumญSuspended
12
12
Description
177.8 (7)
96(3.78)
3.7 : 1
Lb-In
ญ
ญ
DAEWOO M-150 BL2