Pentair Pool Products Delta D2CX20-21 Installation & Service Manual With Parts List page 7

Fig. 5
Fig. 6
Fig. 7
23833A596
6. Use wire brush and thoroughly clean any
deposit from passage above grinder impeller
and in cavity for grinder ring. See Figure 5.
7. Replace new grinder impeller, use screwdriver
in slot while turning on impeller, until hand
tight, with screwdriver still in shaft slot bump
with plastic hammer. See Figure 6.
8. Replace new grinder ring and plate. Use oil on
ring for easy fit.
9. To provide proper alignment use three sections
of an old ½" tape measure as shims 120
degrees apart and then tighten bolts. Be sure
to pull screws down evenly applying pressure
on all three screws. DO NOT TIGHTEN ONE
SCREW CLEAR DOWN BEFORE ADJUST-
ING OTHER SCREWS. See Figure 7.
10. Replace holding screw and washer, use small
amount of Loctite #271 screw. See Figure 8
11. Bump set screw wrench with plastic hammer
to tighten, working against small allen wrench
or screwdriver in shredding ring.
12. Check freedom of rotation using finger on
impeller vanes. Pump should turn free with
slight drag due to seals. Use caution to avoid
injury from shredding ring while turning grinding
impeller.
13. As a final check, measure distance from end
of ring to bottom of impeller vanes. This
3
should be
less it will indicate pump impeller has partially
unscrewed when grinder impeller was re-
moved. See Figures 9 and 10. If this is the
case, pump case will have to be removed to
tighten pump impeller. These steps will be
given in the following instructions. In rare
cases if the impeller is jammed so tight it can't
be removed by the steps given it will be
necessary to remove the motor housing so
that the motor rotor can be gripped to break
loose the grinder impeller. See Figure 11.
7
1
/ " to / ". If distance is only
32 8
1
/ " or
16