12
Servicing the Mechanical Seal and Bearing
Mechanical Seal and Bearing Removal
1. Close inlet and outlet valves. Vent pressure from pump and drain before disconnecting
inlet and outlet lines. The inlet may be drained by loosening tube fitting (52) or removing
plug (19) from outboard end cover (50). Fluid in the outlet can be pumped to the inlet
chamber by rotating the unit counterclockwise. Remove tubing (53) from pump.
2. Remove spacer section of coupling. Disconnect inlet and outlet flanges. Remove pump
from baseplate.
3. Install a ¾”-10 eyebolt (2) in the tapped hole in end cover (050)
(Approx. weight – Size 400: 108 lbs., Size 462: 133 lbs.). Support weight of cover and
remove Hex bolts (051). Remove cover (050).
4. Remove 0-ring (12) and discard.
5. Loosen and remove capscrews (61). Remove thrust plate (48), spacers (88) and oil
balance tube (81) concurrently.
6. Remove O-rings (82) from oil balance tube (81) and discard.
7. Slide idler balance piston housing (044) from idlers (041).
8. Rotate idlers (041) and remove from housing (005). Rotate power rotor (022)
counterclockwise and remove both idlers (040). DO NOT drop idlers as they emerge
from housing (005).
9. Loosen setscrew (056) and remove coupling nut (055). Remove key (054) from power
rotor.
10. Loosen setscrews (75) and remove locknut (33) and nut (32).
11. Remove retainer (034) by removing bolts (035) and lockwashers (036). Grasp power
rotor (022) and pull assembly from pump until the seal seat adapter (63) extends from
the pump.
NOTE
The power rotor may need to be pressed out of the housings due to seal seat adapter/inboard
cover mating surface providing resistance. (Optional) Use the housing strongback along with a
blank to apply even pressure to the outboard size of the power rotor in order to prevent damage
to the mechanical seal faces. Blank must be smaller than the power rotor bore of the housing.
12.
Removal of ball bearing (031) can be accomplished using a bearing puller (2-jaw placing
jaws inside outer spacer (30) holes) or by the completing following steps (see special
tools required):
a)
Installing allthread into the inboard cover/bearing retainer holes
b)
Install coupling nut (55) in order to prevent damaging the power rotor threads.
c)
Installing the bearing removal tool on the allthread and securing it using nuts and
hardened washers to the inboard end of the power rotor.
d)
Place bar stock in outer spacer holes and rest the bar stock against the inboard
cover.
e)
Tighten bearing removal tool nuts evenly until the bearing is free from the shaft.
This will cause the power to be pressed back into the pump.
Summary of Contents for CIRCOR GLH8L-400 Series
Page 20: ...20 DRAWINGS...
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