Troubleshooting; Repair Parts; Components List - GP 2AUW Manual De Instalación

of the pump back to the liquid source. We will not
assume any responsibility for damage to the pump if
not check valve is used in the discharge line. Properly
fueled and lubricated, your pump will run without
attention.
3.5 If flexible hose must be laid across a roadway, protect
it with planking. Instantaneous shutoff pressure ap-
plied when a vehicle runs over an unprotected hose
will cause "hydraulic shock".
3.6 Drain the pump body whenever there is danger of
freezing.
3.7 Always flush out the pump at the end of operation if
the liquid being pumped may leave a solid or sticky
residue in the pump. If this is not done, damage to
the pump may result.

4. Troubleshooting

A) PUMP FAILS TO PRIME
1. Priming chamber empty or not sufficiently full.
2. Wrong direction of rotation.
3. Air leaks through the suction line joints (loose screws
or broken hoses).
4. Quick coupling gaskets broken or not well mounted.
5. Hose clamps loose or broken (tighten or replace).
6. Liquid in priming chamber overheated (fill with
cold liquid).
7. Delivery line under pressure (see Operating Instruc-
tions).
8. Rotation Speed too slow (increase speed).
9. Worn or broken impeller, worn or damaged volute
(replace as required).
10. Air leaks through damaged mechanical seal (replace
the seal).
B) LOW CAPACITY
1. Suction strainer clogged (clean).
2. Suction or delivery line obstructed (remove obstruc-
tion).
3. High friction losses in the suction line (eliminate
unnecessary curves, restrictions or valves).
4. Suction lift too high (set up the pump as near as pos-
sible to the water level).
5. Rotation speed too low (increase speed).
6. Impeller clogged (remove obstruction).
8*
19
9
16
15
19
24
25
17
18
13
14
15
16

Components List

Item No. Part Description
Engine – 3 ⁄ HP
1
2
1
Engine – 5 HP
2 Locknut – 3 ⁄ " – 16
8
3 Engine adapter
4 Aluminum washer –
5 Bolt – ⁄ " – 24" x
5
16
Seal assembly
Shaft sleeve
6
O-ring housing
O-ring volute
Impeller
7 Volute
Impeller shim: 010, 020, 030
Hose mounting gasket
Hose mounting nipple
8*
Hose mounting nut
Suction strainer
9 Suction strainer
13 Pump housing
14 Bolt – ⁄ " – 16" x 1
3
8
15 O-ring, drain/filler plug
16 Drain/fill plug
17 Flapper valve
Suction flange BSP*
18
Suction flange NPT
19 Bolt – ⁄ " – 18" x
5
16
Discharge elbow BSP*
24
Discharge elbow NPT
25 Discharge gasket
26 Bolt – ⁄ " – 18" x 1
5
16
27 Lock nut – ⁄
5
16
28 Cradle assembly
* Supplied with 2AU, built before September 2005.
6
4
5
7
Quantity
⁄ "
5
16
⁄ "
3
4
⁄ "
1
2
⁄ "
7
8
⁄ "
1
2
" – 18
1
28
27
2
3
26
1
4
1
4
4
1
1
3
2
2
2
1
1
1
4
2
2
1
1
7
1
1
4
4
1
3