14. INSPECT PARKING BRAKE LININGS AND DRUMS (See page BR2-6) (a) Check the lining-to-drums contact condition and lining wear. Minimum lining thickness: 1.0 mm (0.039 in.) (b) Check the brake drums for scoring or wear. Maximum drum inside diameter: 168 mm (6.61 in.) (c) Clean the brake parts with a damp cloth. NOTE: Do not use compressed air to clean the brake parts. (d) Bed down the parking brake shoes and drum. When performing the road test in item 24, do the following: • Drive the vehicle at about 30 mph (50 km/h) on a safe, level and dry road. • With the parking brake release button pushed in, pull on the lever with 20 lb (9 kg, 88 N) of force. • Drive the vehicle for about 1/4 mile (400 meters) in this condition. • Repeat this procedure 2 or 3 times. • Check parking brake lever travel. If necessary, adjust the parking brake. CHASSIS 15. INSPECT STEERING LINKAGE (a) Check that the steering wheel freeplay. Maximum steering wheel freeplay: 30 mm (1.18 in.) With the vehicle stopped and pointed straight ahead, rock the steering wheel gently back and forth with light finger pressure. (b) Check the steering linkage for looseness and damage. Check that: • Tie rod ends so not have excessive play. • Dust seals and boots are not damaged. • Boot clamps are not loose. 16. INSPECT STEERING GEAR HOUSING Check the steering gear housing for oil leakage.