Delavan T90 - Manual (Page 7)

e. Slide the small O-ring (D) onto the shaft. Push the O-ring out
of the key way to avoid cutting the O-ring. Push the O-ring
into the groove in the seal ring.
f. Slide the small washer (E) over the shaft and into the recess
in the seal ring.
g. Slide the wave spring (F) over the shaft and onto the washer
(E). The spring will rest against the impeller hub.
h. Install the face seal in the end plate (2) in the same way as
into the body (3).
6. P/N 26556-4 pump with lip seals (return to previous section
if your pump has face seals):
a. Install lip seals (P/N 45005) using sealant such as Permatex
on the mating surfaces. Press to the bottom of the seal bores
in both end plate and body. See exploded view, page 4.
b. Tap lip seal (17) into pump body using pipe nipple or seal
driver of a diameter large enough to push on the inside of the
concave side of the seal. The cupped, concave side of the
seal faces towards the inside of the pump. The spring faces
toward the liquid flow.
c. Make sure the seal bottoms against the seal supporting edge
machined into the casting.
d. Install Woodruff key (8) in shaft (15). Be sure the key bottoms.
e. Slide impeller (5) onto shaft.
f. Tap lip seal (17) into end plate adapter (45006) using pipe
nipple or seal driver. Cupped or concave side goes toward the
inside of pump; spring faces toward liquid flow.
g. Make sure the seal bottoms against the seal supporting edge
machined into the casting.
7. Place gasket (4) on body (3).
8. With an arbor press, press on inner race and press end plate
(2) onto shaft (15).
Caution: Uneven tightening of nuts (1) and capscrews (12)
to pull end plate (2) down can crack casting.
Note: Although an arbor press is recommended, if none is
available, you can pull end plate onto body by care-
fully tightening nuts (1) and capscrews (12).
9. Install capscrews (12) and nuts (1) and tighten.
10. Turn shaft to be sure the pump is not binding. If pump seems to
be binding, tap shaft lightly with a soft hammer.
11. Replace nameplate (14) in body (3). Nameplate is merely
pushed into place.
Turbo™ 90 Troubleshooting Guide
PROBLEM CAUSE PROCEDURE
1. NO PRESSURE, OR
NO CAPACITY
a. Inlet line not immersed in liquid or low level a. Reposition inlet line or fill tank.
b. Pump not primed b. Prime pump; be sure mounted below water level.
c. Plugged strainer c. Clean strainer with water and soft brush if needed.
d. Intake line air leaks d. Tighten all connections, using pipe joint compound.
Check hoses for leaks.
e. Intake line blocked e. Check line and clean.
f. Pump turning wrong direction f. Check direction of arrow on pump, mount correctly.
g. Pump parts worn g. Replace using Repair Kit, or return for repair or if under warranty.
2. EXCESSIVE NOISE
OR VIBRATION
a. Loose couple a. Tighten or replace coupler.
b. Bent or damaged shaft, improperly aligned b. Replace shaft.
c. Intake line leaks; plugged strainer c. See PROCEDURES c. and d. above.
d. Worn parts, broken rotor vanes d. See PROCEDURE g. above.
3. PUMP RUNS, BUT
LOW CAPACITY
a. PTO speed too slow. a. 1000 RPM required.
b. Intake line partially blocked or too small b. Clean line. Use 1 1/2” I.D. hose.
c. Too many fittings, elbows, valves c. Replumb for more direct path.
d. Plugged strainer or leaks d. See PROCEDURES c. and d., block 1.
4. PRESSURE AT PUMP,
BUT LOW OUTPUT
AT NOZZLES
a. Nozzle orifice too small or strainer plugged a. Replace nozzles; clean nozzle strainer.
b. Discharge line too small b. Use 1 1/2” I.D. hose.
c. Valves set incorrectly c. Check, adjust valves.
5. IMPOSSIBLE TO
ROTATE SHAFT
a. Improper assembly a. Gasket in place? Review assembly instructions.
b. Foreign material or corrosion in pump b. Disassemble and clean. Use clean water supply.
6. LEAK a. Lip seal installed backward a. Check drawing page 4. Spring should be toward liquid.
b. Worn parts b. Repair using repair kit.
c. Worn casting c. Replace pump.