9 6 BRAKES AND WHEELS r Drum Bram Sarvlca Dlagnasls itontlnnadl Condition Possible Cause Correction ALL BRAKES DRAG 4 Compensating or bypass port of 4 Open with compressed air ADJUSTMENT IS master cylinder closed KNOWN TO BE CORRECT 5 Use of inferior hydraulic fluid 5 Overhaul wheel and or master Continued or rubber parts Swollen cups cylinder corroded wheel or master cylinder bores BRAKE PEDAL 1 Master cylinder compensating 1 Use compressed air to unplug TRAVEL DE port plugged CREASING 2 Power bellcrank pivot pins 2 Lube pedal pivot or pivot pins binding CJ only or pedal pivot binding on manual brakes 3 Swollen cup in master cylinder 3 Replace rubber parts Flush system 4 Master cylinder piston not 4 Overhaul master cylinder returning 5 Wheel cylinder pistons sticking 5 Overhaul wheel cylinder ONE WHEEL DRAGS 1 Weak or broken brake shoe 1 Replace the defective brake shoe retracting springs springs and lubricate the brake shoe ledges 2 Power unit bellcrank pivot pins 2 Lube pedal pivot or pivot pins binding CJ only or pedal pivot binding 3 Insufficient brake shoe to drum 3 Adjust brakes Repair auto clearance matic adjusters if necessary 4 Loose wheel bearings 4 Adjust wheel bearings 5 Wheel cylinder piston cups 5 Overhaul wheel cylinders swollen and distorted 6 Pistons sticking in wheel cylinder 6 Clean or replace pistons clean cylinder bore 7 Restriction in brake line 7 Clean out or replace 8 Loose anchor pin 8 Adjust and tighten lock nut 9 Parking brake components seized 9 Repair or replace parts as or incorrectly adjusted necessary ONE WHEEL LOCKS 1 Contaminated linings 1 Replace the linings 2 Tire tread slick 2 Replace tire or match up tire treads from side to side