Hale Q Series Muscle - Manual (Page 137)

137 MUSCLE (Midship) Pumps Installation, Operation, and Maintenance Manual
p/n: 029-0020-63-0
Packing and Mechanical Seal Maintenance
9. Without touching the face of the seat, install the cup and seat into the mechanical
seal cover. Lubricate the cup and mechanical seal cover with
Pac-Ease Rubber
Lubricant Emulsion . Also apply a generous coating of the lubricant to the seal dia-
phragm.
10. Replace the seal rings in the mechanical seal cover. Apply a light coat of grease
to the rings being careful not to get grease on the impeller shaft.
11. Slide the mechanical seal cover over the impeller shaft making sure the seal
remains seated in the bore of the cover. Make sure there is no oil or grease on
the faces of the mechanical seal. (See Figure 8-3: “Qmax, Qmid, and Qtwo
Mechanical Seal Assembly Overview” on page 134.)
12. If binding occurs, apply additional PAC-EASE lubricant.
13. Screw a 7/16”-14 UNC stud into one of the holes in the mechanical seal housing
to aid in bolt hole alignment.
14. Insert the mechanical seal cover in the mechanical seal housing making sure to
line up your center punch marks.
15. Apply Loctite and install four 7/16-14” screws. Tighten the screws evenly in a
staggering (or criss-cross) fashion. Torque screws to 40 ft.-lbs. (54 N-m).
Note: If the screws are being replaced, they must be replaced with Grade 5, zinc plated
steel, nylon locking type screws.
16. Slide the slinger onto the impeller shaft.
17. Install new oil seal.
18. Place a new gasket over the mating surface of the mechanical seal housing and
rear bearing housing.
19. Install two 1/2”-13 UNC studs into the mechanical seal housing. Slide the rear
bearing housing over the impeller shaft making sure the oil seal aligns properly.
Align the bolt holes and your center punch marks.
IMPORTANT!
DO NOT ALLOW THE WEIGHT OF THE REAR BEARING HOUSING TO REST ON THE
OIL SEAL AS DAMAGE MAY RESULT RENDERING THE SEAL INOPERATIVE.
20. Apply Loctite and insert twelve 1/2”-13 screws to secure the rear bearing housing
to the seal housing. Evenly tighten the screws in a staggering (or criss-cross)
fashion and torque to 65 ft.-lbs. (88 N-m). (See Figure 8-3: “Qmax, Qmid, and
Qtwo Mechanical Seal Assembly Overview” on page 134.)
21. Install the 250-0310-00-0 (310S) bearing onto the impeller shaft and properly
seat into the bearing housing.
22. Insert the gear key into the slot on the impeller shaft, then install the gear.