UNIREX Pump - Manual (Page 46)

MARK 3 USER INSTRUCTIONS ENGLISH 71569102 08-06
Page 46 of 68 flowserve.com
Mark 3 design
On Group 1 and 2 pumps the bearing carrier is
turned by using a strap wrench, with the strap
located around the outside diameter of the carrier
face. On Group 3 pumps, the bearing carrier is
turned by using a spanner wrench to engage the
cogs on the outside diameter of the bearing carrier.
Figure 6-13
w) Because the O-rings [4610.2] will cause some
resistance in removing the bearing carrier
assembly from the housing, hold the bearing
carrier flange firmly and with slight rotation, pull it
out of the bearing housing. The bearing carrier
assembly with the shaft and bearings should come
free. This unit will appear as shown in figure 6-14.
Further disassembly is not required unless the
bearings are to be replaced.
Figure 6-14
x) Remove the snap ring [2530] (see figure 6-15) on
Group 1 and 2 pumps, or the bearing retainer
[2530.1] on Group 3 pumps.
Figure 6-15
Group 1 and 2 pumps equipped with
duplex angular contact bearings use a bearing
retainer [2530.1] instead of the snap ring.
Remove the carrier from the bearing.
y) The bearing locknut [3712] and lockwasher
[6541.1] may now be removed from the shaft
[2100]. Discard the lockwasher.
z) An arbor or hydraulic press may be used to
remove the bearings [3011 and 3013] from the
shaft. It is extremely important to apply even
pressure to the inner bearing race only. Never
apply pressure to the outer race as this exerts
excess load on the balls and causes damage.
Applying pressure to the outer
race could permanently damage the bearings.
aa) The Mark 3A design has an optional oil slinger
[2541] located between the bearings. If present,
inspect it for damage or looseness. Remove if it
needs to be replaced.
bb) On Group 2 and 3 pumps, the bearing housing
[3200] must be separated from the bearing
housing adapter [1340]. The adapter O-ring
[4610.1] should be discarded.
Mark 3A and ANSI 3A design
This is accomplished by removing the cap screws
[6570.5], which thread into the bearing housing.
Mark 3 In-Line design
There is no adapter o-ring [4610.1] when an oil
drain tap is supplied in the adapter.
Mark 3 design
This is accomplished by removing the hex nuts
[6580.8] and the cap screws [6570.5].
cc) If lip seals [4310.1 and 4310.2] (see figure 6-16)
are used, they should be removed from the
bearing carrier and adapter and discarded.
Figure 6-16
dd) If the bearing isolators are removed from either
the bearing carrier or adapter they must not be
reused, discard appropriately.
ee) If magnetic seals are used, maintain the seals as
specified by the manufacturer.
Mark 3 and Mark 3A design
Remove the Trico oiler/site gage [3855] (figure
6-17) and oil level tag (figure 6-18) from the
bearing housing.
ANSI 3A design
Remove the site gage [3856] (figure 5-1) and oil
level tag (figure 6-18) from the bearing housing.
Save these parts for reuse.
Figure 6-17