9
CAUTION
ATTENTION
Take extreme care not to damage seal mating face or O-ring during assembly. Do
not touch seal face with any tools. After installation, clean face with solvent and soft,
lint free cloth.
CAUTION
ATTENTION
If seal mating face is not bottomed out in bore of bearing housing (9), seal could be
severely damaged.
5.
Install ball bearing (31) into bearing housing (9) by hand. It should slide in easily. If ball bearing (31) has one
shield only, the shield must be facing inside of bearing housing (9).
6. Install bearing retainer plate (70) and capscrews (75). Do not install lip seal (32) into bearing retainer plate (70)
at this point (lip seal only required for 039_-1 and 046A suffix pumps).
NOTE:
If lip seal (32) is already installed in retainer plate (70), remove it and discard.
7. Set shaft (6), which has seal spacer (74) and rotating part of seal (51) already installed, on arbor press. Coupling
end must be facing up.
8. Carefully slide bearing housing (9), which has ball bearing (31), seal head and bearing retainer (70) already
installed, onto coupling end of shaft (6) until inner race of ball bearing (31) contacts shaft (6).
CAUTION
ATTENTION
Take extreme care not to nick or otherwise damage carbon face of seal (51) when sliding
on bearing housing (9).
9. Press bearing (31) onto shaft (6) until it bottoms on shaft (6) shoulder. Use cylindrical sleeve which contacts only
the inner ring of ball bearing (31) and clears inner diameter of bearing retainer plate (70). Snap ring groove in
shaft (6) should just clear ball bearing (31) inner ring.
10. Install snap ring (33) on shaft (6).
CAUTION
ATTENTION
Handle ‘shaft/bearing housing’ assembly with great care for remainder of pump assembly
since any significant cocking of bearing housing assembly relative to shaft could damage
ball bearing (31) or mechanical seal (51). If shaft (6) is to be set on a work surface, it should
not be allowed to rest on bearing housing.
11. Install three 0-rings (80) into bearing housing (9). If necessary, use grease to hold 0-rings in place.
12. Install 0-ring (40) into bearing housing (9). If necessary, use grease to hold 0-ring in place.
13. Slide shaft/bearing housing (9) assembly, which includes stationary part of mechanical seal (51), ball bearing (31)
and ball bearing cover (70), into front cover (1).
14. Remove capscrews (75) and bearing retainer plate (70).
CAUTION
ATTENTION
Do not allow shaft (6) to move axially in front cover (11) as this could cause seal damage.
15. Secure bearing housing (9) to front cover (1) with cap screws (42). Tighten capscrews with torque wrench
per assembly drawing torque values.
16. Install lip seal (32) into bearing retainer (70), where applicable (039_-1, and 046A suffix pumps only).
CAUTION
ATTENTION
Be sure to press only on outside diameter of lip seal (32) to avoid damaging it.
