JABSCO 50270 Series Istruzioni operative

Service Instructions for Jabsco

Bronze Flexible Impeller Electro

Magnetic Clutch Pump 50270 Series

Inspect all parts for wear or damage and replace if necessary.

DIS-ASSEMBLY

1. Remove end cover screws, end cover and gasket. (1,2,18)

2. Remove impeller. (3)

3. Loosen cam screw (7) and remove cam. (6)

4. Remove wear plate. (4)

5. Remove bolt from end of shaft. Screw 5/8” UNC bolt into

the hub of the pulley assembly in order to draw the pulley from the pump shaft. (27)

6. Remove the 3 screws (15) holding the ﬁeld coil onto the housing adaptor.

7. Remove ﬁeld coil. (16)

8. Remove 3 ﬁxing bolts and rear adaptor housing from bearing housing. (14,15)

9. Remove bolts from bearing housing to body and remove body from bearing housing.

(10,11,12)

10. Remove seal assambly. (19)

11. Press shaft on impeller drive end to remove shaft and bearings from bearing housing.

12. Press shaft out of bearings supporting inner race of bearing. Remove retaining rings

from shaft if necessary. (21,24)

13. Remove inner bearing seal if it needs replacing. (13)

Flanged

BSP

shop

ASSEMBLY

1. Press new seal into bearing housing with lip

facing away from bearing bore. (19)

2. Fit retaining rings onto shaft and press on

bearings. (21,24)

3. Grease seal area of shaft, push bearings

and shaft into bearing housing by pressing

on outer race of bearings. (10,20,22,25)

4. Fit adaptor housing to bearing housing,

secure with 3 bolts. (14,15)

5. Fit ﬁeld coil to adaptor using 3 bolts. Check

that centre bore of ﬁeld coil ﬁts over boss

on adaptor. (16,17)

6. Wipe pump shaft to remove any particles and check location of key. Slide pulley assem-

bly onto shaft, lining with key and secure with retaining bolt. (22,23,26,27,28)

7. Place slinger on shaft. (9)

8. Fit pump body to bearing housing securing with 4 bolts. (5,10,11,12)

9. Take new seal seat (cup rubber and seal seat), lightly grease the outside edge of cup

rubber and press into cavity in pump body with ceramic facing towards impeller bore.

10. Slide mechanical seal sub assembly over shaft until the carbon face engages against

the ceramic face of stationary seal. (19)

11. Fit wearplate. (4)

12. Coat cam screw threads, top side and back of cam, with non setting jointing compound

and ﬁt into body, securing with the cam screws. (6,7)

13. Lightly grease impeller bore and ﬁt impeller. (3)

14. Fit end cover and gasket, and secure with screws. (1,2,18)

KEY DESCRIPTION QTY KEY DESCRIPTION QTY

1 End cover 1 15 Bolt 3

2 Gasket 1 16 Field coil 1

3 Impeller 1 17 Screw 3

4 Wear plate 1 18 End cover screws 5

5 Body 1 19 Seal assembly 1

6Cam 1 20 Bearing 1

7 Cam screw 1 21 Retaining ring 1

8 Pipe plug 2 22 Shaft 1

9 Slinger 1 23 Key 1

10 Bearing housing 1 24 Retaining ring 1

11 Washer 4 25 Bearing 1

12 Bolt 4 26 Washer 1

13 Inner bearing seal 1 27 Screw 1

14 Clutch adaptor 1 28 Pulley 1

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