Assessments - 3, GPA: 4.3
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NOTE NOTE c. Slide the yoke from side to side to loosen the yoke bearing races (54) within the housing. The races are a normal slip fit but may be tight. Use an open end wrench between the yoke and the pintle bearing to help slide out the races. Apply pressure to bearing (55) at the approximate center and allow the bearing rollers to gently press the race out of the housing. 15. Remove yoke (56) and drive shaft (48) from the housing together. Turn the yoke at an angle and slide the two parts out of the housing. See Figure 15. Figure 15. Removal of Yoke and Shaft from Housing. 16. After removal of yoke from the housing, remove seat (59) and yoke spring (60). Seat (58) and rollpin (57) will be attached to the yoke (56). Do not disassemble further unless seat (58) is damaged. NOTE Normally a wear pattern will exist on seat (58). If the seat is damaged or shows heavy wear, replace seat (58) and (59) and rollpin (57). NOTE If drive shaft (48) is defective, perform step F.17. If front bearing (61) was defective, perform steps F.17 and 18. 17. Remove bearing (61) from shaft (48) with the nine inch piece of 1 1/2” heavy wall tubing shown in Figure 9. Press off with an arbor press. 18. Remove bearing race (62) from housing (27) as shown in Figure 16. Use special tool shown in Figure 10. NOTE For units without shaft seal, omit shaft seal removal and installation procedure. 19. Remove retaining ring (44) then press shaft seal (45) from pump housing (27). NOTE If yoke (56) and front shaft bearing (61) were not defective, perform the following step. 20. Remove and replace shaft seal (42) located within housing (27) as follows: (Refer to figure 17.) NOTE For units without a shaft seal, this step will be used to remove a defective drive shaft only. In addition, references to shaft seal installation and removal must be omitted. a. Install a nine inch piece of 1 1/2” heavy wall tubing over drive shaft (48) within the housing. The end of the tubing will rest against the inner race of tapered roller bearing (61) and extend out beyond the end of the pump housing. Place the complete unit with tubing into an arbor press with drive spline up. Press the drive shaft through the bearing and out of the unit. A 0.001 press exists between the shaft and bearing so considerable force is required to remove the bearing. See Figure 17 (PVE19/21). b. Remove retaining ring (44) and pull shaft seal (45) from housing (27). Be careful not to damage the aluminum die cast housing in the seal area. c. Press drive shaft (48) into shaft bearing (61) as follows: Use a short piece of 1 1/2” inch heavy wall tubing (approximately 6” long) over the drive spline of the shaft. The tubing must be long enough to go through the shaft seal end of the pump and make contact with the inner race of the front bearing. Press the shaft through the bearing with an arbor press until the bearing bottoms against the shoulder of the shaft (snap ring on the PVE12). See Figure 18. d. Remove the short piece of tubing and turn shaft bearing (69) in its race with the end of the shaft. The bearing rollers must turn free and smooth. e. Tape the spline end of drive shaft (48) with plastic tape to prevent cutting new shaft seal (45). Start taping the shaft close to the housing and work toward the end of the shaft. Install a new shaft seal in position over the shaft and press evenly into the housing. Use shaft seal driver shown in Figure 12. The seal must be positioned just below the retaining ring groove. Install retaining ring (44, 47 for PVE12) into the housing. Use internal Truarc pliers to install retaining ring. Figure 16. Removal of Front Bearing Race. Shaft Seal 1 1/2” heavy wall tubing 6” long. See Figure 11. Arbor Press HereRetaining Ring Figure 18. Front Bearing Installation. Shoulder 1 1/2” heavy wall tubing 6” long. See Figure 11. Arbor Press Here G. Assembly of Housing Parts NOTE If a new shaft bearing (61), shaft (48), valve block (26), or housing (27) is required, a complete preload adjustment must be performed. If the same parts are returned to service, the preload adjustment can be omitted. The same procedure applies to yoke (56) and its associated bearings. 1. If the shaft bearing (61) requires replacement, install a new bearing race (62) into housing (27). Use tool shown in Figure 11 to press bearing race in place. Make sure the bearing race (62) is oriented properly to accept the roller bearing before pressing into the housing. The race must be bottomed against the shoulder of the housing at completion of press. 2. Place housing (27) on a flat surface with the shaft seal end down. Lay the front shaft bearing (61) into the race. Install yoke spring (60) and seat (59) into the housing. Figure 16. Removal of Front Bearing Race. Shaft Seal 1 1/2” heavy wall tubing 6” long. See Figure 11. Arbor Press HereRetaining Ring Figure 18. Front Bearing Installation. Shoulder 1 1/2” heavy wall tubing 6” long. See Figure 11. Arbor Press Here G. Assembly of Housing Parts NOTE If...
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