SERVICE MANUAL CONDITION POSSIBLE CAUSE CORRECTION Groan noise in steering pump 1 Low oil level 1 Fill reservoir to proper level and check for leaks. 2 Air in the oil Poor pres- 2 Tighten connector to specified sure hose connection torque  Bleed system by operat- ing steering from right to left - full turn. Rattle or knock noise in steer- 1 Loose pump pulley nut 1 Tighten nut to specified torque. ing pump If pulley is still loose, both the pulley and pump shaft must be replaced. Momentary increase in effort 1 Low oil level 1 Fill reservoir to proper level when turning wheel fast to and check for leaks. right or left 2 Loose belt 2 Adjust belt tension to specifica- tion 3 High internal leakage 3 Check pump flow and pressure. (See Power Steering System Test Procedure) Steering wheel surges or jerks 1 Low oil level 1 Fill reservoir to proper level when turning with engine run- and check for leaks. ning especially during parking 2 Loose belt 2 Adjust belt tension to specifica- tion 3 Insufficient pump pressure 3 Check pump pressure (See Power Steering System Test Procedure) Replace relief valve if defective Replace pumping elements if excessively worn. 4 Sticky flow control valve 4 Inspect for varnish and small nicks or damage on valve Re- place if necessary. Foaming milky power steering 1 Low oil level 1 Fill reservoir to proper level fluid and check for leaks. 2 Air in the fluid 2 Bleed air from system. 3 Hard shaft seal 3 If oil level is correct and pump still foams, check shaft seal for excessive hardening or wear. Extremely cold temperatures will cause system aeration with these conditions Replace shaft if ex- cessively worn at seal area. Low pressure to steering gear 1 Flow-control valve stuck or 1 Remove burrs or dirt; replace. inoperative 2 Pressure plate not flat 2 Correct. against cam ring 3 Extreme wear of cam ring 3 Replace parts Flush system. and rolls 4 Scored pressure plate or 4 Replace parts Flush system. carrier 5 Cracked or broken thrust 5 Replace part. or pressure plate CTS-4027 - Page 5