BRACKET 5166381 - Caterpillar

Figure 18. Front Bearing Installation.7. Set housing (3) on its side so the long pintle is down. Install bearing spacer (30) and short pintle cover (27), (without shims). Cross torque the four pintle cover screws (26) to 5 lb. in. while rotating the yoke back and forth to seat the pintle bearings. Cover screw torque will stop changing when the bearings are seated. VERY CAREFULLY remove the short pintle cover. DO NOT disturb the yoke after the cover is removed. Measure the height of the spacer with respect to the housing pintle face in two places (180° apart). Use a depth micrometer to perform this measurement. See Figure 19. Average the readings to obtain a nominal value. A 0.007-0.009 inch preload is required on the pintle bearings. Calculate the necessary shims to provide this preload as follows: Assume the depth readings were 0.029 and 0.027 inch. Add the two figures together and divide by two (2) to obtain the average. In this case the average is 0.028 inch. Subtract the nominal preload of 0.008 inch from the calculated average to obtain the required shim thickness. If the calculated shim thickness is greater than 0.020 inch, another shim must be added to the opposite side of the yoke to reduce the total shim thickness to less than 0.020. Shim thickness at either pintle must not exceed 0.020. This is necessary to provide proper "o"ring compression and prevent pintle seal leakage.
Figure 19. Pintle bearing spacer height with respect to pintle face.
Figure 19a. Measuring height of pintle bearing spacer with respect to the pintle face.8. Install "o"ring (29) against spacer (30) into the groove.9. Install correct shims (28) and cover (27); cross torque pintle cover screws (26) to 170-190 lb. in. ( Early design uses screw and washer arrangement. Torque screw and washer to 115-125 lb. in.) The yoke (23) will be stiff but should be loose enough to be moved by hand, (approximately 20 lb. in. torque). The tightness/drag indicates the bearings are preloaded. If the preload is too great, repeat the preload adjustment until correct.E. Shaft Bearing Preload Adjustment
The following steps (E1 through E7) pertain to the preload of the shaft bearings. If the bearings, shaft, valve block and housing are being returned to service, the preload adjustment, (steps 1 through 7), can be omitted. The same bearing spacer (11) will be used to preload the bearings. If any of the above parts were replaced, a complete shaft preload adjustment must be performed.1. Install the thickest bearing spacer (11) over shaft (25) with the chamfer facing into the housing (toward the shoulder on the shaft).2. Slide new bearing (9) on the shaft and up against spacer (11). The small diameter of the tapered roller bearing must face out of the housing.3. Assemble housing (3) to valve block (2) without gasket (4) and rotating group (12). Turn shaft (25) to seat the bearings while tightening attaching screws (1) to five (5) lb. in. Continue to turn the shaft until no