Gardner Denver LEGEND P Series, Operating And Service Manual

Page: 27 / 40

SB-7-622 Page 26
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 35. Refer to Figure 7-8, page 34, 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.
Seals are delicate; use extreme care when installing impeller shafts in the headplate bores. A piece
of light shim stock wrapped around the shaft keyway will prevent cutting the seal lip.
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 30, 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.
NOTICE
If more than .007” shim is required, put .007” on the drive end and the remaining on the gear end.
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.
7. Insert bearing-seal spacers (34), (41) into the drive shaft headplate bore and spacer (33) into the remaining bores
(see exploded view, page 35).
MECHANICAL SEALS ONLY
A. Refer to Figure 7-1, page 28. 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 install spacer (34), (41) in the bore and allow for the
bearing inner race (E) to be started on the shaft.
FIGURE 7- 2
FIGURE 7- 3