ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual page 866

TOTAL END CLEARANCE
IMPELLER TO GEAR HEADPLATE
IMPELLER TIMING (A-A) (C-C)
TIP TO CASE CLEARANCE (B-B)
The bearing driver will position the mating ring (B) to the correct depth with respect to the mechanical seal (A).
7. Apply a light oil to the drive headplate bearing bore, bearing inside diameter, and shaft seat. Install the drive
end bearings (14and 35 for grease) or (80 and 35 for dual splash lube) as far as possible without force.
8. Attach the puller plate shown on page 25, to the drive headplate using the tapped holes used on the drive
headplate (see FIGURE 7-3, page 32). Tighten the bolts so that the advance of the bearings stay as uniform
as possible. Bearings should be pressed until flush with the drive headplate.
9. Lubricate the gear end bearing fits with a light oil as described previously. Install gear end bearings (14) as
far as possible without force. Use the plate, used to install the drive end bearings, to press the bearings on
the shafts as described in Step 8. Press bearings into the gear headplate until completely seated in the
bearing bore.
10. Impellers should now be checked for free axial movement by hitting the ends of the impeller shafts with the
palm of your hand.
11. Push the impellers against the gear headplate and recheck the total end clearance between the drive
headplate and the impellers (see FIGURE 7-4).
A. If total end clearance is insufficient, loosen impeller case to headplate bolts on either headplate, and
move the headplate away from the case far enough to insert a paper shim in the amount equal to the
insufficient clearance. Retighten case bolts and again check the total end clearance. Refer to
FIGURE 7-4 for correct clearance.
B. Excessive end clearances normally will require new impeller assemblies, but in some circumstances the
impeller case can be removed and reduced in width by machining off the amount of excess clearance.
C. Apply Loctite 246 on the 4 bearing retaining screws. Install 4 bearing screws and washers into the gear
end headplate. Tighten screws evenly to the torque value given in FIGURE 7-9.
3H 3M 3L
0.007-0.011
0.003-0.005
0.005-
0.007 .006-.008
0.002 min.
4H 4M 4L
0.007-0.011
0.003-0.005
0.006-
0.008 .007-.010
0.002 min.
5H 5M 5L
0.007-0.011
0.003-0.005
.007-
.010 .008-.010
0.002 min.
E-123