Specifications

place. 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.
14. Install drive key (A).
15. For 3600/4600 “BH” hydraulic drive assembly, go to Section 13, INSTRUCTIONS FOR ASSEMBLY OF A
TYPE “BH” HYDRAULIC DRIVE.
16. Read and understand all safety instructions and warnings before installing and operating pump.
3600/4600 “HB” and 3622 “SBFO” Pumps (See Figure 14.2)
17. Place drive gear (34) into case bore. Install key (B) in keyway of drive shaft (32). Slide drive shaft into bore
of drive gear.
18. 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).
19. Install packing washer (18) over drive shaft (32) into packing bore of backplate.
20. 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.
21. Check drive shaft (32) for free movement after each ring is installed.
22. When packing box is sufficiently full to allow entry of packing gland (14) about ¼ of inch [6 mm],
reassemble packing gland.
23. 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.
24. Install ball bearing (2) on drive shaft (32) and into backplate (6A, B) as shown in the sectional drawing on
page 68. The bearings are prelubricated 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.
25. Install drive key (A).
26. Read and understand all safety instructions and warnings before installing and operating pump.
3700/4700 “BH” Pumps (Standard Mechanical Seal) (See Figure 14.1)
27. 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.
28. 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).
29. Install retaining ring (12) on drive shaft (32).
30. Carefully remove all burrs and sharp edges from shaft over which rotating element of seal will slide.
31. Lubricate drive shaft and mechanical seal bore with a compatible lubricant. Install mechanical seal (11) on
drive shaft and position seal back against retaining ring (12). Care must be taken not to nick o-ring. Be
sure lapped (polished) faces of stationary seal face and rotating element are together.
32. Install seal retainer (9). Secure seal retainer in place using two hex head cap screws (E).
33. Install drive key (A).
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