Ebsray R75, Installation, Operation & Maintenance Instructions Manual, Page: 8 / 14

Publication No.: 2753-20
8
5.6 SHAFT-BEARING ASSEMBLY REPLACEMENT
The Bearing-Shaft Assembly Includes:
Shaft (21)
Inspection End Bearing (23)
Drive End Bearing (24)
Circlip (25)
To replace the Bearing-Shaft complete steps one to five in
SECTION 5.5, then complete the following steps:
1. Remove the Driver Key (34).
2.
Remove the Bearing Cap’s (99) eight cap head
setscrews (99B). Remove the Bearing Cap, remove
the Bearing Cap’s O-ring (99A), discard and replace
with lightly lubricated new O-ring.
3. Replace the Bearing Dust Seal (33)
4. Push or gently tap the Impeller end of the Shaft (21)
and Bearing’s fixed assembly from the Bearing
Housing.
To replace bearings see Section 5.7 below.
5. Gently tap or press the driven end of the new Bearing-
Shaft Assembly into the Bearing Housing until the
drive end bearing’s outer race is fully seated in the
Bearing Housing.
6. Fit the Bearing Cap over the driven end of the Shaft.
Check the Bearing Cap’s O-ring is correctly located
before, hand fitting the eight cap head setscrews.
Torque the setscrews to 13 Nm (10 ft-
lb’s).
7. Replace the Driver Key. Continue on with step six of
SECTION 5.5.
5.7 BEARING REPLACEMENT
A press and two pieces of flat bar are required to remove the
Shaft (21) and Bearing’s fixed assembly from the Bearing
Housing and also to remove and replace the Bearings from the
Shaft.
1. To replace the Drive End Bearing (DEB, 24) and the
Inspection End Bearing (IEB, 23) complete steps one
to five in SECTION 5.6, then complete the following
steps: Remove the Bearing Circlip (25), starting with
the DEB, support the Impeller side of the DEB’s inner
raceway and press the driven end of the Shaft until
the DEB is pushed off the Shaft.
2. Then support the driven side of the IEB and press
from the Impeller end of the Shaft. Press until the IEB
is pushed off the Shaft.
3. To press the IEB onto the
Shaft fully support the inner
raceway of the IEB using
two pieces of flat bar (See
Figure
9). Locate the
Impeller end of the Shaft
(Impeller has a 10mm wide
keyway) through the IEB.
Press the driven end of the
shaft until it fully rests on its
shoulder.
4. To press the DEB onto the Shaft, fully support the
inner raceway of the DEB and press the Impeller end
of the Shaft onto the DEB. Press the Impeller end of
the Shaft until the circlip groove is fully exposed.
5. Fit the Bearing Circlip
5.8 VALVE & VALVE SPRING REPLACEMENT
NOTE:
Some Pump variants do not have an integral valve and the
passage in the body is blocked off with a blanking plug.
The blanking plug is maintenance free.
1. Remove the four Valve Cover cap head setscrews
(103B).
2. Remove the Valve Cover.
3.
Discard the Valve Cover O-ring (103A), and replace
with a lightly lubricated new O-ring.
4.
Remove the Bypass Spring. Then remove the Valve
(105). If the Valve is stuck use pliers or similar to pull
the Valve out.
NOTE:
Be careful not to scratch the Valve with the pliers as any
foreign materials left inside the pump WILL seriously
damage the pump.
5.
Fit the new Valve into the Body
6. Loosely fit Bypass Spring into the Valve Cover.
7. Fit the Bypass Spring/Valve Cover to the Body
ensuring that the Bypass Spring Locates onto the
Valve’s boss.
8. Ensuring the valve cover O-ring is located properly,
hand fit the four Valve Cover cap head setscrews.
Torque setscrews to 58 Nm (43 ft-lbs)
Figure 9