Inspection Of Brake Master Pump And Vacuum Booster; On-Vehicle Inspection; Inspect The Vacuum Booster - Lifan 620 Maintenance Manual

5) Remove the brake lamp components.
Release the brake lamp switch and
①
Remove the brake lamp switch from the brake pedal support.
②
6）Remove the pad of brake pedal from the brake pedal.
(2) Installation
1) Install the brake pedal pad on the pedal.
2) Install the brake lamp components on the brake pedal.
3) Install the brake pedal.
① Smear lithium base glycol grease on the head face and side on the 2 new bushes.
② Install the brake pedal and 2 bushes onto the brake pedal support by bolts and nuts. Tightening
torque: 37N·m.
4) Install the brake pedal support.
Install the brake pedal support by 4 nuts.
①
② Connect the connector of brake la
③ Encase the bolts into the brake pedal support. Tightening torque: 20N·m.
5) Connect the U connector of push rod of the brake master pump.
Smear lithium base glycol grease on the push rod pin.
①
Connect the clip of push rod pin to the push r
②
6) Install the instrument cluster components.
7) Check and adjust the height of the brake pedal.
8) Check the free play of the brake pedal.
9) Check the braking distance of the brake pedal. After assembly, check and adjust the height,
free play and braking distance of the brake pedal.
iii. Inspection of brake master pump and vacuum booster

On-vehicle inspection

1. Inspect the vacuum booster

1) Check the air tightness. See Fig. 2-49.
Start the engine and then stop it after 1-2 min, and slowly step down the pedal for several times.
①
Note: It proves good air tightness in case that the pedal drops greatly at the first trample rises
gradually after the second or third trample.
② When the engine is running, step down the brake pedal and then stop the engine. Note: It
proves good air tightness if the braking distance has no change at 30s after the pedal is stepped
down.
2) Operation Inspection.
When the ignition switch is at position OFF,
①
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locking nuts.
Tightening torque: 13N·m.
mp switch.
od of brake master pump.
Fig. 2-49
step down the pedal for times, and then check if the
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