English; Typical Applications; Design Features - Johnson Pump F5B-3000 Handbuch

ENGLISH

Self-priming, flexible impeller pump of bronze,
pedestal mounted

Typical applications

• Marine
Engine cooling, bilge pump, deck-wash
pump, wash-down, emptying holding
tanks.
• Industry
Liquid circulation and transfer,
emptying tanks and sump drainage,
handling of solids in suspension.

Design features

Body: Bronze
Impeller: F5B-F8B: neoprene or
nitrile
F9B, F95B: neoprene
Shaft: Stainless steel
The shaft is mounted
with permanently
lubricated double ball
bearings
Seal: Mechanical
Cam: Full or reduced
Connection: See "Type designation",
page 7
Pressure and capacity data
See page 21-24.
Service instructions
See parts list pages 7-8, 28-31.
Disassembly
1. Remove endcover and gasket.
2. Pull out the impeller using two screw
drivers or other suitable implements.
3. Remove the cam and wash away
residual traces of sealing compound on
the cam and inside the pump body.
4. Remove the wear plate.
6
5. Remove the retaining ring (F5B/F7B -
pos 27, F95B - pos 16) and washer (pos
26,) holding the mechanical seal. F8B/
F9B has no washer.
6. Lubricate the shaft in front of the
mechanical seal and press down the
seal for easier removal from the shaft.
7. Loosen the nut (pos 25) on F5B/F7B.
Remove the screws holding the pump
body to the pedestal on F8B/F9B/F95B
(pos 21). Remove the pump body with
the mechanical seal.
8. Remove the ceramic ring.
9. Clean shaft, pump body, cam and
endcover. Wash away any traces of
sealing compound.
Assembly
1. Moisten the ceramic ring with soapy
water (5% soft soap) and mount it in
the pump body. Protect the sealing
surfaces of the mechanical seal against
grease and damages, as it will affect the
seal function.
2. Fasten the pump body onto the
pedestal. On F5B/F7B with nut (pos
25) and on F8B/F9B/F95B with screw
(pos 21).
3. Moisten the rotating ring with soapy
water and press it in its position on the
shaft.
4. Fit the washer (F5B/F7B/F95B - pos
26) and the retaining ring (F5B/F7B -
pos 27, F95B - pos 16) on the shaft.
F8B/F9B has no washer.
5. Mount the wear plate in the pump
body.
6. Apply sealing compound to the cam
and cam screws. Fasten the cam.
7. Lubricate the impeller with vaseline or
the like and fit it with a rotating move-
ment in the intended direction of
impeller rotation.