OM-05816
ULTRA V SERIES
MAINTENANCE & REPAIR
PAGE E - 14
NOTE
Proceed with
Rotating Assembly Installation
be
fore installing the impeller capscrew and washer
(28 and 29). The rotating assembly must be in
stalled in the pump casing in order to torque the im
peller capscrew.
After the rotating assembly is installed in the pump
casing, coat the threads of the impeller capscrew
(28) with thread locker (G-R P/N 18771-109) and
install the impeller washer (29) and capscrew;
torque the capscrew to 90 ft. lbs. (1080 in. lbs. or
12,4 m. kg.).
Rotating Assembly Installation
(Figure 1)
Install the O‐rings (36 and 37) and lubricate them
with light grease. Ease the rotating assembly into
the pump casing using the installation tool.
Be
careful
not to damage the O‐ring.
Install the rotating assembly adjusting spacers
(34) and secure the rotating assembly to the pump
casing with the hardware (13 and 35).
To set the impeller and wear plate clearance, refer
to the
Back Cover Installation And Adjustment
.
Back Cover Installation And Adjustment
(Figures 1 and 8)
If the wear plate (5) was removed for replacement,
carefully center it on the back cover and secure it
with the hardware (7 and 8). The wear plate
must
be concentric to prevent binding when the back
cover is installed.
Clearance between the impeller and wear plate is
adjusted using four adjusting screws and locking
collars. There are 18 detents on the I.D. of each
locking collar (11). Indexing the collars one detent
on the adjusting screws represents approximately
.005 inch (0,13 mm) of wear plate clearance. The
recommended clearance between the wear plate
and the impeller is .010 to .020 inch (0,25 to 0,50
mm).
Replace the back cover O‐rings (6 and 9) and lubri
cate them with a generous amount of No. 2 grease.
Clean any scale or debris from the contacting sur
faces in the pump casing that might interfere or
prevent a good seal with the back cover.
USE TWO REMAINING
ADJUSTING SCREWS AND
LOCKING COLLARS TO
SET FACE CLEARANCE
USE TWO
OPPOSING
BACK COVER NUTS
TO PRESS
BACK COVER
INTO PUMP
CASING
INDEX COLLARS 3
DETENTS COUNTER‐
CLOCKWISE, THEN
TURN CLOCKWISE
UNTIL SCREW
HOLES ALIGN
Figure 8. Installing and Adjusting Back Cover
Screw the four adjusting screws (12) into the
tapped holes in the back cover plate until they are
just flush
with the machined surface on the back
side of the cover plate.
Align the back cover plate over the studs (3) and
slide it into the pump casing. Use two back cover
nuts (15) on diagonally opposing studs to press
the back cover into the pump casing until the wear
plate
just touches
the impeller when the shaft is
turned by hand.
Tighten the back cover nuts
evenly to avoid binding.
With the wear plate just touching the impeller, turn
the two free adjusting screws until they engage the
pump casing. Position the locking collars over the
adjusting screws so the holes in the collars for the
locking screws align approximately with the holes
in the cover plate.
Loosen the back cover nuts used to press the back
cover into the pump casing one full turn.
Pull the collars off the adjusting screws, index them
three detents counterclockwise, and reinstall the
collars on the adjusting screws. Use the collars to
turn the adjusting screws clockwise until the holes
in the locking collars realign with the tapped screw
holes in the back cover plate. Secure the locking
collars (11) to the back cover plate with the hard
