Dodge Nitro. Manual — part 368

POWER BOOSTER CHECK VALVE TEST

1. Disconnect vacuum hose from check valve.

2. Remove check valve and valve seal from booster.

3. Use a hand operated vacuum pump for test.

4. Apply 15-20 inches vacuum at large end of check valve. See Fig. 52.

5. Vacuum should hold steady. If gauge on pump indicates vacuum loss, check valve is faulty and should be

replaced.

Fig. 62: Typical - Vacuum Check Valve & Seal
Courtesy of CHRYSLER LLC

STANDARD PROCEDURE

MASTER CYLINDER BLEEDING

1 - BOOSTER CHECK VALVE
2 - APPLY TEST VACUUM HERE
3 - VALVE SEAL

2007 Dodge Nitro R/T

2007 BRAKES Base - Service Information - Nitro

A new master cylinder should be bled before installation on the vehicle. Required bleeding tools include bleed
tubes and a wood dowel to stroke the pistons. Bleed tubes can be fabricated from brake line.

1. Mount master cylinder in vise.

2. Attach bleed tubes to cylinder outlet ports. Then position each tube end into reservoir. See Fig. 63.

3. Fill reservoir with fresh brake fluid.

4. Press cylinder pistons inward with wood dowel. Then release pistons and allow them to return under

spring pressure. Continue bleeding operations until air bubbles are no longer visible in fluid.

Fig. 63: Master - Typical
Courtesy of CHRYSLER LLC

REMOVAL

MASTER CYLINDER

1 - BLEEDING TUBES
2 - RESERVOIR

2007 Dodge Nitro R/T

2007 BRAKES Base - Service Information - Nitro

Fig. 64: Identifying Reservoir, Fluid Level Electrical Connector, Brake Lines, Mounting Nuts & Booster
Check Valve
Courtesy of CHRYSLER LLC

1. Siphon and drain the fluid from the reservoir (2).

2. Disconnect the fluid level electrical connector (3) from the reservoir (2).

3. Remove the brake lines (4) at the master cylinder.

4. Remove mounting nuts (5) from the master cylinder.

Fig. 65: Master Cylinder
Courtesy of CHRYSLER LLC

5. Remove master cylinder.

6. Remove cylinder cover and drain the rest of the fluid.

7. If master cylinder reservoir requires service, see REMOVAL.

INSTALLATION

2007 Dodge Nitro R/T

2007 BRAKES Base - Service Information - Nitro

MASTER CYLINDER

Fig. 66: Master Cylinder
Courtesy of CHRYSLER LLC

Fig. 67: Identifying Brake Booster & Brake Booster Studs
Courtesy of CHRYSLER LLC

1. Clean cylinder mounting surface of brake booster (3).

2. Install master cylinder onto brake booster studs (4).

NOTE:

If master cylinder is replaced, bleed cylinder before installation.

NOTE:

Insure the O-ring is on the master cylinder at the booster interface.

2007 Dodge Nitro R/T

2007 BRAKES Base - Service Information - Nitro