STG global TANVAC HDV3000, Operator'S Manual

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SB-7-632 Page 33
INTERNAL CLEARANCES FOR STANDARD UNITS ONLY
3H 3M 3L 4H 4M 4L 5H 5M 5L
TOTAL END CLEARANCE 0.007-0.011 0.007-0.011 0.007-0.011
IMPELLER TO GEAR HEADPLATE 0.003-0.005 0.003-0.005 0.003-0.005
IMPELLER TIMING (A-A) (C-C)
0.005-
0.007 .006-.008
0.006-
0.008 .007-.010
.007-
.010 .008-.010
TIP TO CASE CLEARANCE (B-B) 0.002 min. 0.002 min. 0.002 min.
FIGURE 7-4
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.
NOTICE
Bearings will not be flush with gear headplate bores when completely seated.
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.