ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual page 865

3. Assemble gear headplate (18) and mounting foot (17) to the impeller case with cap screws (21) and where the
mounting foot is secured to the headplate use capscrews (16). The two positioning dowel pins (19) will
ensure proper alignment of the headplate and impeller case. Also secure lifting lugs using capscrews (21)
(see exploded assembly drawing on page 39. Refer to Figure 7-9, page 38, for torque specifications.
4. Apply a light oil or grease on the shaft seal areas and the bearing areas. Insert impellers into the gear
headplate using the same headplate bores as used in the original assembly.
5. Position blower so that impellers are vertical, with the drive end on top. It will be necessary to use blocks in
order for the unit to set level. Measure the total end clearance using a depth micrometer (see Figure 7-2).
If total clearance is not within the limits specified in Figure 7-4, page 33, it may be necessary to shim the case
to obtain the proper total end clearance. The shim should be placed between the drive headplate and
impeller case.
6. Assemble drive headplate (24) to impeller case as in step 3 with the gear headplate. If shims were required,
place shims between drive headplate and impeller case.
A. Refer to Figure 7-1, page 31. Lightly coat the impeller shaft (H) and the inside diameter of the mating
ring (B) with assembly lubricant.
B. Install the mating ring (B) on the shaft only far enough to get the bearing (E) started on the shaft.
C. Lightly lubricate the bearing inner race (E) with a light oil or grease.
D. Using a press, install the bearing on the shaft with the bearing driver shown on page 24.
E-122