27
33. Place one square head bolt (G) through each slot in backplate (6A, B) and through each hole in packing
gland (14). Install packing gland (14) into packing box about ¼ of an inch [6 mm]. Slide packing gland
clip (13) over square head bolts (G). Using two locknuts (F), secure packing gland (14) in place. Install
spring clip (15) across square head bolts (G). Draw locknuts up evenly on packing gland to assure proper
seating of packing (16), then loosen locknuts (F) about ½ turn. DO NOT cock packing gland. This could
cause binding or heating of drive shaft.
34. Install drive key (A).
35. For 3600/4600 “BH” hydraulic drive assembly, go to Section 13, INSTRUCTIONS FOR ASSEMBLY OF A
TYPE “MBH” HYDRAULIC DRIVE.
36. Read and understand all safety instructions and warnings before installing and operating pump.
3600/4600 “HB” and 3622 “SBFO” Pumps (See Figure 14.2)
37. Place drive gear (34) into case bore. Install key (B) in keyway of drive shaft (32). Slide drive shaft into
bore of drive gear.
38. Place appropriate number of case gaskets (20) on backplate side of case (19A, B, C, D, E). Align
backplate (6A, B) on dowel pins (J). Secure backplate to case using two washer head cap screws (K) and
eight hex head cap screws (L).
39. Install packing washer (18) over drive shaft (32) into packing bore of backplate.
40. Install packing ring (16) and lantern ring (17), if used, in packing bore of backplate. Stagger joints on each
packing ring 180 apart. Seat each ring before adding next ring. Rings must not be tamped or seated too
tightly.
41. Check drive shaft (32) for free movement after each ring is installed.
42. When packing box is sufficiently full to allow entry of packing gland (14) about ¼ of inch [6 mm],
reassemble packing gland.
43. Place one square head bolt (G) through each slot in backplate (6A, B) and through each hole in packing
gland (14). Install packing gland (14) into packing box about ¼ of an inch [6 mm]. Slide packing gland clip
(130 over square head bolts (G). Using two locknuts (F), secure packing gland (14) in place. Install spring
clip (15) across square head bolts (G). Draw locknuts up evenly on packing gland to assure proper
seating of packing (16), then loosen locknuts about ½ turn. DO NOT cock packing gland. This could
cause binding or heating of drive shaft.
44. Install ball bearing (2) on drive shaft (32) and into backplate (6A, B) as shown in the sectional drawing in
Figure 14.2. The bearings are pre-lubricated and do not require lubrication at time of initial installation. A
small amount of grease will be required during regular maintenance. Align setscrews in inner race of ball
bearing with wide groove in shaft. Tighten setscrews in ball bearing (2) to secure bearing to drive shaft
(32). Install retaining ring (3) into backplate (6A, B) to secure ball bearing (2) to backplate.
45. Install drive key (A).
46. Read and understand all safety instructions and warnings before installing and operating pump.
3700/4700 “BH” Pumps (Standard Mechanical Seal) (See Figure 14.1)
47. Install faceplate end retaining ring (36B) on drive shaft (32). Install key (B) in keyway on drive shaft. Slide
drive gear (34) onto drive shaft. Install backplate end retaining ring (36A) on drive shaft to secure drive
gear.
48. Place appropriate number of gaskets (20) on backplate side of case (19A, B, C, D, E). Slide drive gear
(34) assembled with drive shaft (32), and backplate (6A, B) into case bore. Align backplate (6A, B) on
hollow dowel pins (J). Secure backplate (6A, B) to case (19A, B, C, D, E) using two washer head cap
screws (K) and eight hex head cap screws (L).
49. Install retaining ring (12) on drive shaft (32).
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