SERVICE INSTRUCTIONS
DISASSEMBLY
1. Remove end cover screws, end cover and O-ring.
2. Remove impeller by grasping hub with water pump
pliers.
3. Loosen cam screw and remove cam (clean off
sealant).
4. Remove pulley or coupling and key from shaft.
5. Remove retaining ring which secures bearing/shaft
assembly to pump body.
6. From impeller end of pump, press bearing and shaft
assembly out of bearing bore. Remove slinger from
shaft.
7. From drive end of pump, press the seal out of the
seal bore.
8. If bearings or shaft need to be replaced, carefully
insert two equal size slot screwdrivers between
bearings 180° apart. Simultaneously twist
screwdrivers in opposite directions to separate
bearings. Continue to push bearings off of shaft
taking care not to damage bearings or scratch shaft.
9. Remove snap ring that positions the bearings on the
shaft.
NOTE: Inspect all parts for wear or damage and
replace where necessary.
ASSEMBLY
1. Install bearing positioning snap ring on shaft.
2. Press bearings (one from each end of shaft) onto
shaft and against positioning snap ring. Slide slinger
onto impeller end of the shaft and position against
raised shoulder near bearings.
3. Press seal (with lip pointing toward impeller bore)
into seal bore in pump body. Lubricate seal lip with a
small amount of grease.
4. Align impeller end of shaft with the seal and press
shaft/bearing assembly into the bearing bore (push
on bearing outer race). Install bearing retaining ring
in retaining ring groove.
5. Apply a thin layer of sealant to screw threads and
top of cam and install in body. Secure with cam
screw.
6. Lubricate impeller bore with light coat of water pump
grease and start impeller into bore with a rotary
motion, until impeller screw engages slot in shaft,
then push into bore.
7. Install O-ring and end cover. Secure with end cover
screws.
Capacities reduced by approximately 10% using Nitrile impeller at higher speeds and higher pressures.
NOTE: Progressively longer life may be expected as operating pressures and speeds are reduced. Factory Application
Engineering assistance suggested for operation in light shaded area and recommended for heavy shaded area.
Capacitor type motor recommended.Table shows approximate Head-Flow for new pump in U.S. gallons per minute and
liters per minute.
HEAD CAPACITY TABLE
Model 2620-1001
Total Head 500 RPM 1160 RPM 1750 RPM 2100 RPM 2450 RPM 3000 RPM 3600 RPM
Head in
Feet PSI GPM GPM GPM GPM GPM GPM GPM
(Meters) (kg/sq cm) (LPM) HP (LPM) HP (LPM) HP (LPM) HP (LPM) HP (LPM) HP (LPM) HP
10 4.3 1.6 1/12 3.5 1/6 5.8 1/4 6.7 1/3 7.5 1/3 9.4 1/2 11.3 3/4
(3.0) (0.3) (6.0) (13.3) (22.0) (25.4) (28.4) (35.6) (42.8)
20 8.7 1.0 1/12 2.6 1/6 5.0 1/4 5.8 1/3 6.6 1/3 8.4 1/2 10.4 3/4
(6.1) (0.6) (3.8) (9.8) (18.9) (22.0) (25.0) (31.8) (39.4)
30 13.0 –– –– –– –– 3.8 1/4 4.6 1/3 5.3 1/3 7.2 1/2 9.1 3/4
(9.1) (0.9) –– –– –– –– (14.4) (17.4) (20.0) (27.3) (34.4)
40 17.3 –– –– –– –– –– –– –– –– –– –– 5.6 1/2 7.7 3/4
(12.2) (1.2) –– –– –– –– –– –– –– –– –– –– (21.0) (29.2)
50 21.6 –– –– –– –– –– –– –– –– –– –– –– –– –– ––
(15.2) (1.5) –– –– –– –– –– –– –– –– –– –– –– –– –– ––
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