Jeep Cherokee, Wagoneer, Comanche Repair Manual 1984-2001

This Haynes repair and service manual, covers 1984-2001 Jeep Cherokee, Wagoneer, and Comanche, U.S. and Canadian models. Note: this manual DOES NOT include Grand Wagoneer or diesel engine info.
Book Excerpt: 1984-2001 Jeep Cherokee, Wagoneer, Comanche Repair Manual TUNE-UP AND ROUTINE MAINTENANCE

AIR FILTER AND PCV FILTER REPLACEMENT

1. At the specified intervals, the air filter and (if equipped) PCV (positive crankcase ventilation) filter should be replaced with new ones. The engine air cleaner also supplies filtered air to the PCV system.
2. The filter on carburetor-equipped models is located on top of the carburetor and is replaced by unscrewing the wing nut from the top of the filter housing, disconnecting the clips and lifting off the cover (see illustration). On most fuel-injected models, the filter is located in a housing in the engine compartment. It can be replaced after disengaging the clips holding the top plate in place (see illustration).
3. While the top plate is off, be careful not to drop anything into the carburetor, TBI or air cleaner assembly.
4. Lift the air filter element out and wipe out the inside of the air cleaner housing with a clean rag.
5. Place the new filter in the air cleaner housing. Make sure it seats properly in the bottom of the housing.
6. The PCV filter is also located inside the air cleaner housing on some models (see illustration). Remove the cover and the air filter as previously described, then locate the PCV filter on the inside of the housing.
7. Remove the old filter.
8. Install the new PCV filter and the new air filter.
9. Install the cover and any hoses which were disconnected.

BRAKES

MASTER CYLINDER | REMOVAL, OVERHAUL AND INSTALLATION
(Refer to illustration 8.2)

1. Place rags under the brake line fittings and prepare caps or plastic bags to cover the ends of the lines once they are disconnected. Be careful not to spill fluid during this procedure.
2. Loosen the tube nuts at the ends of the brake lines where they enter the master cylinder. To prevent rounding-off the flats on these nuts, a flare-nut wrench, which wraps around the nuts, should be used.
3. Pull the brake lines away from the master cylinder slightly and plug the ends to prevent contamination.
4. Remove the two master cylinder mounting nuts and remove the master cylinder from the vehicle.
5. Remove the reservoir cover, then discard any fluid remaining in the reservoir.
BRAKES | MASTER CYLINDER OVERHAUL
6. Mount the master cylinder in a vise with the vise jaws clamping on the mounting flange.
7. Remove the primary piston snap-ring by depressing the piston and extracting the ring with a pair of snap-ring pliers.
8. Remove the primary piston assembly from the cylinder bore. Discard it, since it can only be serviced as an assembly.
9. Reinstall the reservoir cover and remove the secondary piston assembly from the cylinder bore by applying compressed air to the secondary brake line port.
10. Inspect the cylinder bore for corrosion and damage. If any corrosion or damage is found, replace the master cylinder body with a new one, as abrasives cannot be used on the bore.
11. Remove the seals, O-ring, piston spring and seal retainer from the secondary piston. Discard them.
12. Clean the master cylinder body and secondary piston with clean brake fluid or brake cleaner.
13. Assemble the O-rings, seals, piston spring and seal retainer to the secondary piston (see illustration). Make sure the seal lips face away from each other.
14. Lubricate the cylinder bore and primary and secondary piston assemblies with clean brake fluid. Install the secondary piston assembly into the cylinder.

Subject: 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 Jeep Cherokee, Wagoneer, Comanche service, maintenance, repair. ISBN-10: 1563925400 | ISBN-13: 9781563925405 | Haynes 50010