F-750-025-A / rev 12.20 – ZCM- ZCHM Series Metric Manual
6
Figure 1: Step 2 Illustration
3)
Measure the stub shafts axial location with
respect to the outer-most face on the adapter
as shown in Figure 2. This will dictate the
impeller clearance to the pump casing. Once
the dimension is set, tighten the collar screw
to 20 ft-lbs [27 Nm]. Ensure that the collar [7]
remains all the way against the shoulder on
the stub shaft [6] (in the outboard direction).
Once the stub shaft’s axial location is set, do
not remove the screw unless you believe it is
not in its original location.
Figure 2: Shaft to adapter measurement
4)
The remaining pump assembly is now ready
to be performed. (For double seal assembly
refer to instructions listed in Appendix B) First
the stationary seal [16+17] must be pressed
into the cover or stuffing box [4]. Temporary
rubber emulsion or water should be used on
the elastomer, and the seal should be pressed
in by hand. Attach the cover to the pump
adapter [5], or attach the stuffing box to the
cover. Then place the cover in the pump
adapter. This may require screws with the
large flat covers.
Figure 3: Step 4.1, stationary seal into stuffing box
Figure 4: Step 4.2, cover mounted to adapter
5)
The shaft sleeve [12] should now be
prepped by applying the seal and o-rings
[13+14]. Use temporary rubber emulsion or
water and push on the rotating seal portion
[15+18+19] of the elastomer bellows seal
onto the shaft sleeve [12]. Put the o-ring(s)
[13+14] into their grooves in the shaft sleeve
