Article No. 87-23-11

BRAKE - FRONT DISC - "GROANING OR GRINDING" NOISE DURING LIGHT BRAKE APPLICATION

NOISE - "GROANING OR GRINDING" - DURING LIGHT BRAKE APPLICATION

LIGHT TRUCK: 1986-87 RANGER, BRONCO II

ISSUE: A "groaning or grinding" noise from the front of the vehicle at slow speeds (below 15 mph/24 km/h) during light braking may be caused by the design of the existing brake components. The noise may be improperly diagnosed as a bad wheel bearing or worn-out disc brake pads. The "groaning or grinding" noise can only be heard from inside the vehicle.

ACTION: To correct this, first identify the type of brake calipers on the vehicle, Refer to the Caliper Identification Information on this page. After proper identification has been established, replace the necessary brake components as indicated in the Brake Components Application Chart on this page. Refer to the appropriate Ranger/Bronco II Shop Manual, Section 12 for removal and installation procedures.

PART NUMBER PART NAME CLASS

E3TZ-1102-A Rotor AM
E8TZ-2B120-B Caliper - R.H. B
EBTZ-2B121-B Caliper - L.H. B
E3TZ-2078-A Hose - R.H./L.H. BM
E7TZ-2078-A Hose - R.H. C
E7TZ-2078-B Hose - L.H. C
388949-S Washer Brake Hose - BM
Package of 10

OTHER APPLICABLE ARTICLES: Supersedes 87-13-21
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION: SP872311A
TIME: 1.2 Hrs. - 4 x 4 vehicles 1.5 Hrs. - 4 x 2 vehicles DLR. CODING: Basic Part No. 2001 - Code: 56

BRAKE COMPONENT APPLICATION CHART

Model Year

Component 1986 1987

Rotors* E3TZ-1102-A E3TZ-1102-A Only for
(4 x 2 Only) vehicles built before
09/15/86
Caliper E8TZ-2B120-B (R.H.) E8TZ-2B120-B (R.H.)
E8TZ-2B121-B (L.H.) E8TZ-2B121-B (L.H.)
Only for vehicles built
before 10/16/86
Brake E3TZ-2078-A E3TZ-2078-A
Hose (R.H. and L.H.) for (R.H. and L.H.) for
Ranger 4 x 2 Ranger 4 x 2
E7TZ-2078-A (R.H.) E7TZ-2078-A (R.H.)
E7TZ-2078-B (L.H.) for E7TZ-2078-B (L.H.) for
Ranger 4 x 4/Bronco II Ranger 4 x 4/Bronco II

* Rotor change not required on 4 x 4 vehicles.

Figure 13:

Figure 14:

Figure 15:

Figure 16:

CALIPER IDENTIFICATION INFORMATION

Ranger/Bronco II vehicles may be equipped with either Ranger-type or Aerostar-type brake calipers based on model year and build dates as indicated below.

Ranger-type caliper: ^ All Ranger/Bronco II vehicles built
(Use to correct 1982 through 1985.
brake noise) ^ All 1987 Ranger/Bronco II vehicles
built after 10/15/86.
^ Brake hose bolt points (threaded end)
outward toward wheel, Figure 13.
^ Outer shoe tabs 5-1/4" (133 mm) apart, Figure 14.

Aerostar-type ^ All 1986 Ranger/Bronco II vehicles.
caliper: ^ All 1987 Ranger/Bronco II vehicles
(Deleted from built through 10/15/86.
production) ^ Brake hose bolt points (threaded end)
same direction as bleed screw, Figure 15.
^ Outer shoe tabs 3-3/4" (95 mm) apart, Figure 16.

NOTE: All Ranger/Bronco II equipped with Aerostartype calipers will require caliper replacement when servicing a brake "groaning or grinding" noise.