Blagdon Pump AP50 Submersible Pump - Manual (Page 5)

PARTS LIST
REF No PART No. DESCRIPTION MATERIAL QTY
1 AP50.60 STRAINER S.G. IRON 1
2 AP50.55 VOLUTE CAST IRON 1
3 AP50.57 IMPELLER GUNMETAL 1
4 AP50.56 VOLUTE SHIM (0.010”) PLASTIC A/R
5 AP50.56A VOLUTE SHIM (0.015”) PLASTIC A/R
6 AP50.52 SEAL NBR/ST.STEEL 2
7 A135 HEX. HEAD BOLT - M10 x 25 HT. STEEL 4
8 AP50.51 BEARING HOUSING CAST IRON 1
9 AP50.43 BUSH MANGANESE BRONZE 1
10 AP50.42 BEARING NUT STEEL PLATED 1
11 AP50.41 BEARING STAINLESS STEEL 1
12 AP50.80 NAMEPLATE BRASS 1
13 K076 HAMMERDRIVE SCREW - No6 x 3/16 STEEL PLATED 2
14 AP50.67 HANDLE M.S. TUBE 1
15 A063 HEX. HEAD BOLT - M10 x 40 HT. STEEL 2
16 AP50.44 INTERMEDIATE SECTION CAST IRON 1
17 AP50.33 LOWER BEARING PLATE GUNMETAL 1
18 AP50.20A DOWEL HT. STEEL 4
19 AP50.25A LOCATING SCREW HT. STEEL 1
20 AP50.20 CYLINDER BODY S.G. IRON 1
21 AP50.25 CYLINDER LINER CAST IRON 1
22 AP50.29 ROTOR SHAFT HT. STEEL 1
23 AP50.28 ROTOR KEY KEY STEEL 1
24 AP50.13 FELT PLUG FELT 1
25 AP50.15 ADJUSTING SCREW HT. STEEL 1
26 AP50.09 LOCKSCREW HT. STEEL 1
27 AP50.22 UPPER BEARING PLATE GUNMETAL 1
28 AP50.23 CIRCLIP HT. STEEL 1
29 AP50.19 LOWER GOVENOR SECTION STEEL 1
30 AP50.18 BALL CAGE ACETAL 1
31 AP50.17 GOVENOR BALL STEEL 2
32 AP50.72 THRUST PAD STEEL 1
33 AP50.07A GOVENOR VALVE BALL CARBIDE STEEL 1
34 AP50.04 GOVENOR CYLINDER BRASS 1
35 AP50.05 O-RING NITRILE 1
36 AP50.11 OIL FILLER PLUG STEEL 1
37 AP50.12 WASHER FIBRE 1
38 AP50.03 SPRING SPIGOT BRASS 1
39 AP50.02 AIR FILTER STAINLESS STEEL 1
40 AP50.01 HOSE UNION STEEL 1
41 Z128 BLANKING PLUG PVC 1
Pump Body
3.9
Remove governor housing and air motor as previously described.
Remove bolts (7) from volute (2) and lift pump body assembly
free.
3.10
Turn pump body over, lock impeller and remove nut (81) together
with impeller (3) from intermediate section (16).
3.11
Remove bolts (76) and withdraw bearing housing assembly (8)
from intermediate section (16).
3.12
Turn impeller shaft (74) and check for ease of movement and
quality of impeller bearing (11). Replace bearings as required.
3.13
To replace bearing (11), remove circlip (7) and withdraw impeller
shaft (74) from housing (8). Unscrew impeller nut (10) and
withdraw bearing (11).
3.14
Check impeller seals (75) and o-ring (6) for wear or damage,
replace as required. Ensure correct position of seals (75) so that
lips face the impeller.
3.15
If impeller is damaged or excessively worn, performance of the
pump will be reduced. When replacing, the impeller must be
adjusted to within 0.005" to 0.010" from the volute (2) internal
face for maximum efficiency. This is achieve by the addition or
subtraction of shims (4) & (5).
3.16 Re-assemble the pump as described above in reverse order. Ensure
all fittings are tight and secure before running the pump.