Delavan T90 - Manual (Page 6)

The numbers in parentheses are reference numbers that are found in the exploded view on page 4. Underlined parts are
included in repair kits, and can be discarded if using kit.
Figure 6. Pulling end plate from body
1. If coupler is on pump shaft, remove.
2. With a 9/16” wrench, unscrew 6 nuts (1) from capscrews (12)
and remove capscrews.
3. Screw two screws (12) into opposite threaded holes on end
plate (2). Install puller (Fig. 6). Tighten puller with a wrench to
pull end plate (2) from body (3). Lift off end plate (2).
Note: Although a puller is recommended, you can sepa-
rate the end plate (2) from the body (3) by using a 1”
diameter brass rod at the shaft end, tapping it with
a hammer.
4. Remove gasket (4).
Note: Snap rings (9,13) bearings (11) and shaft (15) should
not be removed unless damage has occurred.
5. Use snap ring pliers to remove snap ring (9) from end plate (2).
6. To remove bearing (11), push out with arbor press or use a small
piece of brass rod and gently tap with hammer.
7. Remove dust shield (10).
8. Use snap ring pliers to remove snap ring (9) from body (3).
9. Using screwdriver, pry nameplate (14) from body (3).
10. Push shaft (15) and bearing (11) out of body (3) with an arbor
press or by using a small piece of brass rod and tapping with
hammer.
11. Remove snap rings (13) from shaft (15).
12. Press bearing (11) from shaft (15).
13. P/N 26556-11, pump with face seals (skip to next section if
your pump has lip seals):
a. Pry out ceramic seat (B) and seat ring (C) from end plate (2).
b. Lift out dust shield (10) from end plate.
c. Slide seal ring (C) with O-ring from shaft.
d. Lift out three springs (F) from impeller (5).
e. Lift impeller (5) from body (3).
f. Remove Woodruff key (8) from shaft.
g. Slide other seal ring (C) with O-ring from shaft.
h. Pry out ceramic seat (B) and seal ring (C) from body (3).
i. Remove dust shield (10) from body.
14. P/N 26556-4 pump with lip seals (return to previous section
if your pump has face seals):
a. Lift impeller (5) from body (3).
b. Remove Woodruff key (8) from shaft (15).
c. Using screwdriver, pry nameplate (14) from body (3).
d. Remove snap ring (13) from pump shaft.
e. Push the pump shaft out using an arbor press or a small
brass rod by gently tapping with a hammer.
f. Using a drift punch, from the painted side of each casting,
drive the old lip seal (17) out by hitting on the old seal case.
Discard old lip seals.
1. Thoroughly clean all metal parts in solvent with a soft-bristle brush.
2. Coat metal parts with light lubricating oil to assure easier assembly.
3. Obtain repair kit 28455 which contains parts listed on the parts
list, page 5. Replace all old parts with new parts from repair kit.
1. If bearings (11) were removed, lightly oil bearing cavities.
2. Place dust shield (10) in end plate (2) and, applying pressure to
outer bearing race, press bearing (11) downward until it bottoms.
3. Install snap ring (9) in end plate (2).
4. Press other bearing (11) into body (3).
5. Install snap ring (9) in body. Install inner snap ring (13) on shaft
(15) and press shaft into bearing (11). Install outer snap ring (13)
on end of shaft (15).
6. P/N 26556-11, pump with face seals (skip to next section if
your pump has lip seals):
a. Place seal support (A) in body (3).
b. Place the ceramic seat into the pump body all the way down
on the O-ring (A).
Note: Ceramic seat (B) is installed with O-ring groove and
side with marking toward the outside of the pump.
c. Lubricate the O-ring groove on the ceramic seat (B) with clean
oil or petroleum jelly. Place the ceramic seat into the body.
Carefully force the seat down over the O-ring until it is against
the seal support.
Caution: The ceramic seat may be cracked or broken if it is
placed in the body cocked or if excessive force or
metal objects are used to drive it in place.
d. Slide the new seal ring (C) onto the shaft with the internal
O-ring groove toward the inside of the pump. The small
diameter of seal ring should mate with the ceramic seat.
Pump Disassembly
Pump Assembly
Preparation
Assembly