13
WILDEN PUMP & ENGINEERING, LLC
1. Before installing or inserting any components, moisten all parts
with distilled water for lubrication. DO NOT use any oil or sili-
cone lubricants as these may damage the pump or render it
inoperable.
2. When tightening the air valve end into the center section, be
sure to use the tool included with pump upon arrival.
3. Continue to tighten the air valve ends until the top of the end
cap is flush with the center housing.
4. To prevent damage to o-rings in center block from being
damaged upon insertion, carefully fold into a kidney shape
before insertion. (See figure.) After insertion, carefully smooth
o-rings with a tie rod before inserting shaft.
5. When reattaching diaphragms to the shaft, first insert and
tighten the shaft stud into the diaphragm piston using a hex
head wrench. Then proceed to hand-tighten onto end of shaft.
6. When installing diaphragms, be sure to insert the shaft stud into
the outer piston first, tightening with a hex head wrench. (Note:
UX.038 and UX.050 have an integral stud on diaphragm.) Then
proceed to install diaphragms on the end of shaft by rotating
both diaphragms clockwise. If diaphragms are hand-tight on
the shaft and the bolt holes do not line up, alternate to continue
rotating clockwise until holes align if possible. Reverse rotation
to align holes only if it is impossible to align holes through
clock-wise rotation.
7. When reinstalling valve housing, be sure to align hole in side of
valve housing with fluid port in liquid chamber. If inserted incor-
rectly fluid will not pass to the discharge of the pump. Remem-
ber to insert inlet valve ball into liquid chamber before installing
valve housing.
8. After reinserting discharge valve ball, reinstall top retainers. Be
sure not to over-tighten as this may reduce pump performance.
The edge of the retainer, under the wrench landing, must be
flush with the top of the liquid chamber.
9. Reassemble both liquid chambers against the center housing,
aligning all bolt holes. Insert all tie rods and install all cap nuts
and washers. Be sure the Belleville washers have the concave
side of the washer facing toward the center housing. Continue to
tighten until all three pieces meet tightly, but do not over-tighten.
Over-torque of the tie rod cap nuts will cause pump damage.
10. To prevent seizing of hardware upon reassembly, spray an
anti-seize Teflon
®
lubricant on the tie-rod threads before
tightening.
SECTION 7B
REASSEMBLY HINTS & TIPS
When reassembling a UX series pump, it is important to pay particular attention to specific details to avoid damaging the pump or limit-
ing pump performance. To reassemble a UX pump follow disassembly instructions 1 through 18 in reverse order and be sure to adhere to
the following assembly hints & tips:
CENTER SECTION
O-RING
TAPE
NEEDLE NOSE
PLIERS
