“M” Group
1.
Install Pumpac thrust bearing as follows. Remove bearings from boxes and orient as shown in
Figure 26. Oil bearing seat on shaft. Slide both bearings onto shaft as far as possible by hand.
Place pipe or driving sleeve over shaft making sure it rests against inner race only. Make sure
bearing is "square" on shaft. Tap or press evenly until bearing is seated firmly against the shaft
shoulder. Do not mar shaft, especially where it contacts the labyrinth seal.
2.
Insert the bearing lock washer (382A), pressing tang into shaft keyway until it is firmly against the
bearing.
3.
Oil shaft threads lightly and snug the bearing locknut
4.
against the lock washer. Tighten firmly with a spanner wrench. Seat tang securely into slot in
locknut
with drift pin. If necessary, tighten locknut slightly to match tang with slot. do not loosen locknut to
position.
5.
Slide bearing housing (134A) with o-ring in place, over impeller end of shaft and over outboard
bearing.
6.
Install labyrinth seal stator into thrust end cover with o-ring lubricant applied to o-ring.
7.
Place bearing end cover (109A) and .006" white manilla gasket (360A) over coupling end of shaft
and fit into bearing housing. If oil seal is dry, oil lightly before sliding over shaft. Be sure to posi-
tion "TOP" (cast on cover) in line with "TOP" on housing. Bolt end cover firmly to housing. Install
labyrinth seal rotor on shaft with o-ring lubricant.
8.
Oil inboard bearing seat on shaft. Slide inboard roller bearing (409) on shaft as far as possible by
hand. Place driving sleeve of sufficient length over the shaft. The sleeve should contact the in-
side race of the bearing. Be sure the bearing is "square" on shaft then press or tap the bearing
firmly against the shaft shoulder. Take care not to mar shaft.
9.
Place a small amount of o-ring lubricant on inside of bearing frame at oil seal. Slide shaft assem-
bly into the bearing frame as far as possible. When the bearing housing is properly installed (oil
return hole at the bottom), the word "TOP" located on the flange of the bearing housing will line
up with the top of bearing frame. Be sure bearing housing o-ring (496) is in place in groove on
housing. Insert bearing housing bolts into bearing housing and screw about ½" into frame to hold
shaft during further assembly.
10. Install labyrinth seal stator into the bearing end cover (inboard) with o-ring lubricant.
11. Slide gasket (360) and inboard bearing end cover (119A) over shaft and bolt to bearing frame.
12. Install labyrinth seal rotor on shaft with o-ring lubricant.
13. Bearing end play may be determined at this point as follows:
Clamp dial indicator to the pump so that the button rests against the end of the shaft. Push the
shaft back and forth as far as possible. Total end play must be at least 0.001" and not more than
0.008". If end play is less than 0.001" add coupling and bearing end cover gaskets made form
0.006" thick manilla paper. Because of machining tolerances, duplex thrust bearings may vary in
which by up to 0.030". A correctly assembled pump may require as few as one or as many as
three 0.006" thick gaskets. Refer to Fig. 29.
6.5 Reassembly of pump
3500XD Installation, Operation and Maintenance Instructions
45
Содержание Goulds Pumps 3500XD
Страница 1: ...Installation Operation and Maintenance Instructions 3500XD ...
Страница 2: ......
