4-25 STEERING SYSTEM - Continued
Use a hydraulic jack to support the rear cab cross member. Place a maintenance trestle underneath the
cross member to support it.
Remove capscrew and locknuts (9) and remove steering gear.
If steering gear is not replaced immediately, Install capscrews and locknuts into frame and handtighten
only. This will prevent inadvertent damage to cab if trestle is removed.
Inspect steering gear and pitman arm for wear and damage. A bent or damaged input shaft, output shaft,
or pitman arm must be replaced.
Inspect steering gear fittings and hose end fittings for damage. Replace defective components.
Install steering gear to truck frame using capscrews and locknuts (9). Tighten nuts to 180 ft lb (245 Nm).
Jack up cab cross member and remove maintenance trestle. Lower and remove jack.
Apply antiseize compound (item 3, Appendix E) to steering gear input shaft splines. Install yoke (8) using
screw (6) and new locknut (7). Tighten nut to 40 ft lb (55 Nm).
Install hoses (1 and 2) in steering gear port fittings.
Refill power steering reservoir with oil as detailed in Lube Order LO 5-4210-220-12.
Install and adjust drag link to pitman arm as detailed in para. 4-25.5.
Start engine and check hose connections for leaks. Tighten fittings if necessary.
Turn steering wheel fully right and fully left. After a couple of turns the steering motion should become
Stop the engine and refill the reservoir to FULL on the dipstick.
Steering gear adjustment consists of adjusting the relief valve plungers. These are used to
relieve power steering pressure at full left and right turns.
With the engine running, turn the steering wheel in one direction until a high-pressure hiss is heard or until
the axle stops contact each other.