Self-Priming, Flexible Impeller Pump Of Bronze With Electro-Magnetic Clutch - Johnson Pump F7B-5001 Instruction Manual

Self-priming, flexible impeller pump of bronze with
electro-magnetic clutch
Typical applications
• Marine
Bilge pump, wash-down for decks and
equipment, emergency engine cooling
pump, emergency fire pump, fish
washing.
• Industry and agriculture
The pump can be mounted on the
power take-off of a tractor, road
grader etc for irrigation, washing etc.
Design features
Body: Bronze
Impeller: Neoprene or nitrile
Shaft: Stainless steel
The shaft is mounted
with permanently lubricated
double ball bearings
Seal: F7B-5001/-50017 - lip seal
alt. mechanical seal
F8B-5001/-50017
- mechanichal seal
Cam: Full or reduced
Connection: See "Type designation",
page 6
Clutch: Electro-magnetic,
2xA-groove or 1xB-groove
Supply voltage:
12 V (4 amps) DC
24 V (2 amps) DC
Pressure and capacity data
See page 15.
Service instructions
See parts list pages 16-19.
Disassembly
1. Remove endcover and gasket alt. the o-
ring.
2. Pull out the impeller using two screw
drivers or other suitable implement.
3. Remove the cam and wash away residual
traces of sealing compound on the cam
and inside the pump body. Remove the
wear plate.
4. Remove lip seal alt mech seal. Remove
the o-ring (not possible from this
direction on F7B)
5. Back off the screw (pos 21) and remove
the clutch from the shaft.
If necessary, screw a UNC 5/8" screw
into the centre hole of the clutch in order
to press the clutch off the shaft.
6. Back off the screws (pos 24) and remove
the field coil.
7. Remove the retaining ring (pos 12) for
the bearing assembly.
8. Remove the shaft with ball bearings by
pressing on the shaft end from the
impeller side.
9. Remove the ball bearings/retaining ring
and the spacer and on F7B also the o-
ring (pos 27). On F8B do not press the
ball bearings over the sealing surface.
Assembly
1. Mount ball bearings/retaining ring and
the spacer on the shaft and on F7B also
the o-ring. On F8B do not press the ball
bearings over the sealing surface.
2. Press the shaft with ball bearings into the
body and fit the retaining ring
(pos 12).
3. Mount the field coil using the screws
(pos 24) and tighten with torque of
7±1 Nm. On F7B also mount the washer
(pos 29) on the body.
ENGLISH
5