Infiniti Q45. Manual - part 252

BRAKE FLUID

BR-9

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BRAKE FLUID

PFP:KN100

Checking Brake Fluid Level

NFS000BA

●

Make sure that a brake fluid level in reservoir tank is within the
standard (between MAX and MIN lines).

●

Visually check around reservoir tank for fluid leakage.

●

If the level is excessively low, check brake system for leakage.

●

Release parking brake pedal and see if brake warning lamp
goes off. If not, check brake system for fluid leakage.

Drain and Refill

NFS000BB

CAUTION:

●

Refill with new brake fluid “DOT3”.

●

Do not reuse drained brake fluid.

●

Do not let brake fluid splash on painted surfaces of body. This might damage paint, so when
splashing it on the surfaces, immediately wipe off them and wash it away with water.

●

Before servicing, disconnect electrical connectors of VDC/TCS/ABS control unit or battery cables.

1.

Connect a vinyl tube to bleed valve.

2.

Depress brake pedal, loosen bleed valve, and gradually remove brake fluid.

3.

Make sure there is no foreign material in reservoir tank, and refill with new brake fluid.

4.

Rest foot on brake pedal. Loosen bleed valve. Slowly depress pedal until it stops. Tighten bleed valve.
Release brake pedal. Repeat this process a few times, then pause to add new brake fluid to master cylin-
der. Continue until new brake fluid flows out.

5.

Bleed Air. Refer to 

BR-9, "Bleeding Brake System"

 .

Bleeding Brake System

NFS000BC

CAUTION:

●

Carefully monitor brake fluid level in reservoir tank
during bleeding operation.

●

Refill with new brake fluid “DOT 3”. Make sure it is at least
half way at all times while bleeding air out of system.

●

Place a container under master cylinder to avoid spillage of
brake fluid.

●

Turn ignition switch OFF and disconnect VDC actuator
connectors or battery cables.

●

Bleed air in the following order. Right rear brake 

→

 Left

front  brake 

→

 Left rear brake 

→

 Right front brake

1.

Connect a transparent vinyl tube to bleed valve.

2.

Fully depress brake pedal several times.

3.

With brake pedal depressed, open bleed valve to release air.

4.

Close bleed  valve.

5.

Release brake pedal slowly.

6.

Repeat steps 2, through 5, until clear brake fluid comes out of
bleed valve.

SFIA2484E

SBR995

SBR419C

BR-10

BRAKE TUBE AND HOSE

BRAKE TUBE AND HOSE

PFP:46300

Hydraulic Circuit

NFS000BD

CAUTION:

●

All hoses and piping (tubes) must be free from excessive bending, twisting and pulling.

●

Make sure there is no interference with other parts when turning steering both clockwise and
counterclockwise.

●

The brake tubes and hoses are an important safety parts. If a brake fluid leak is detected, always
disassemble the parts. Replace applicable part with a new one, if necessary.

●

Be careful not to splash brake fluid on painted areas; it way cause paint damage. If brake fluid is
splashed on painted surfaces of body, immediately wipe it off and then wash it away with water
immediately.

●

Do not bend or twist brake hose sharply, or strongly pull it.

●

When removing components, cover brake line connections so that no dirt, dust, or other foreign
matter gets in.

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Refill with new brake fluid “ DOT 3 ”

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Do not reuse drained brake fluid.

SFIA2500E

BRAKE TUBE AND HOSE

BR-11

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Removal and Installation of Front Brake Tube and Hose

NFS000BE

REMOVAL 

1.

Drain brake fluid. Refer to 

BR-9, "Drain and Refill"

 .

2.

Cover brake line connections to prevent foreign material such as
dust or dirt from entering into the connections.

3.

Using a flare nut wrench, remove brake tube from brake hose.
Remove union bolt, and remove brake hose from caliper assem-
bly.

4.

Remove lock plate.

5.

Remove mounting nut, and remove brake hose from vehicle.

INSTALLATION 

1.

Position a metal fitting of brake hose between protrusions, and
then tighten union bolt to the specified torque. Refer to 

BR-10,

"Hydraulic Circuit"

 .

CAUTION:

Do not reuse the copper washer.

2.

Connect brake hose to brake tube. Temporarily tighten flare nut
by hand as much as possible. Secure them to bracket with the
lock plate.

3.

Tighten flare nut to the specified torque using a flare nut torque
wrench. Refer to 

BR-10, "Hydraulic Circuit"

 .

4.

Tighten mounting nuts to the specified torque. Refer to 

BR-10,

"Hydraulic Circuit"

 .

5.

After work, bleed air. Refer to 

BR-9, "Bleeding Brake System"

 .

Removal and Installation of Rear Brake Tube and Hose

NFS000BF

REMOVAL 

1.

Drain brake fluid. Refer to 

BR-10, "Hydraulic Circuit"

 .

2.

Cover brake line connections to prevent foreign material such as dust or dirt from entering into connec-
tions.

3.

Using a flare nut wrench, remove brake tube from brake hose.

4.

Remove union bolts, and then remove brake hose from caliper
assembly.

5.

Remove lock plate, and remove brake hose from vehicle.

SFIA2416E

SFIA2290E

SFIA2302E

BR-12

BRAKE TUBE AND HOSE

INSTALLATION 

1.

Install a projection of brake hose metal fitting by aligning with
protrusions on caliper assembly, and then tighten union bolt to
the specified torque. Refer to 

BR-10, "Hydraulic Circuit"

 .

CAUTION:

Do not reuse the copper washer.

2.

Connect brake hose to brake tube. Temporarily tighten flare nut
by hand as much as possible. Secure them to bracket with the
lock plate.

3.

Tighten flare nut to the specified torque using a flare nut torque
wrench. Refer to 

BR-10, "Hydraulic Circuit"

 .

4.

After work, bleed air. Refer to 

BR-9, "Bleeding Brake System"

 .

Inspection after Installation

NFS000BG

CAUTION:

If leak is detected at the connections, retighten it or replace damaged part if necessary.

1.

Check hose, tube, and connections for fluid leakage, damage, twist, deformation, contact with other parts,
and loose connections.

2.

While depressing pedal under the force of 785 N (80 kg, 177 lb) with engine running for approximately 5
seconds, check for fluid leak from each part.

SFIA2286E