User manual BENDIX C-300N HYDRAULIC POWER STEERING

[. . . ] ® C-300N/C-500N HYDRAULIC POWER STEERING GEAR OUTPUT SHAFT OIL RETURN OIL SUPPLY ADJUSTING SCREW C-300N NAME PLATE OUTPUT SHAFT NAMEPLATE C-500N VALVE BODY SIDE COVER ADJUSTING SCREW INPUT SHAFT OIL RETURN OIL SUPPLY STEERING LIMITING STEM PLUG VALVE BODY OUTPUT SHAFT HOUSING C-300N PRESSURE RELIEF & BYPASS VALVE CAP NUT POWER STEERING GEAR DESCRIPTION The Compact 300N and 500N (C-300N/C-500N), Hydraulic Power Steering Gears are designed for medium and heavy duty vehicles with front axle weight ratings of 6, 000 to 9, 000 lbs for the C-300N and up to 15, 000 lbs for the C-500N. They are integral power steering gears incorporating the mechanical and hydraulic actuation and control components in a single cast housing which serves as the power cylinder. The C-300N and C-500N power steering gears are very similar in appearance with the major difference being that the C500N is proportionately larger than the C-300N. The vehicles steering column is coupled to the gear at the input shaft which transmits steering effort through a recirculating ball screw (spindle assembly) and piston. The piston is an integral part of the power assist and also acts as a steering damper. [. . . ] If the power steering gear is so equipped, install the bypass valve ball (52) and spring (51) in the valve body (7). Install the sealing washer (47) around the pressure relief valve seat (48) and using a large bladed screwdriver or tool piece number 298077, install both in the valve body(7). Tighten the valve seat to between 15 and 18 pound feet. Install the pressure relief valve piston (46), spring seat (45), and spring (43) in the valve body. CAUTION: The spring seat (45) must be installed as illustrated in Figure 40. Incorrect installation of the spring 19 base grease. The spindle assembly can be used to assist in pushing the tool through the bore. Install the two O-rings (12) on the valve body (7). Install the ball cage (6) over the input shaft end of the spindle assembly (3). Using a general purpose lithium base grease to hold them in place, install the seventeen balls (9) in the ball cage. Install the outer ball bearing race half (8) over the input shaft end of the spindle assembly (3) and insert the spindle assembly through Bendix tool 297676. Insert the spindle and tool into the valve body (3) until tool completely exits the other side and the seventeen balls (9) of the bearing assembly are resting against the outer race (8) in the valve body. Position the pressure side of the seal (5) in the bore of the non-pressure side of the valve nut(1). Carefully drive the seal into the bore until the retaining ring groove within the bore is visible. Install the retaining ring (50) making certain it is completely seated in the groove. After installing the retaining ring, gently tap the seal (5) from the opposite side until it rests squarely against the snap ring (50). Note: The seal (5) can be driven into the valve body bore using a piece of round brass stock with a diameter of 1. 55 inches. Apply Loctite 932 or 567 to the tread of the valve nut (1) Note: Due to the proximity of the spindle ball bearing, use extreme care in applying the Loctite to the valve nut threads and allow adequate cure time. Making certain not to damage the seal (5), install the valve nut (1) over the input shaft end of the spindle assembly (3) and into the valve body (7). Using Bendix tool 106234, FIGURE 42 - FORMING VALVE BODY TEFLON RING & ORING seat will result in malfunction of the relief valve and damage to the valve piston and seat. Install the pressure adjusting shims (41) and the seal washer (44) on the plug (42). Install the plug in the valve body and torque to between 66 and 73 pound feet using a 26mm socket. [. . . ] Loose or worn ball studs in steering linkage. Loose or worn intermediate steering shafts. 1. If all adjustment has been used, replace output shaft and spindle assembly. Mechanical faults in vehicle steering members. [. . . ]