Grundfos ALLDOS KM 251 - Page 47

KM 251 en Maintenance
V1.0 47
Removing the ball check and contact manometer
1. For pumps and manometers in flameproof version, unscrew the earthing (4u).
2. Hold the connection piece (U) using a screwdriver and unscrew the union nut (3u).
3. Unscrew the ball check (T) from the dosing head.
Clean the ball check
1. Unscrew screw part (t6) using round pliers.
2. Clean all parts, replace any faulty parts.
3. Reassemble ball check.
4. Refit ball check (T).
5. Screw contact manometer (S) and connection piece (U) back on.
6. For pumps and manometers in flameproof version, screw earthing (4u) back on.
Caution
Tighten ball check and connection piece by hand only. Risk of damage!
S Contact manometer
5s Union nut
6s Contact output
T Ball check
U Connection piece
2u Deaeration screw
3u O-rings
4u Connection for earthing cable
5u Union nut
*2) or locking unit
T
5u
4u
3u
2)
U
5s
3u
2u
S
6s
t1 O-ring
t2 Ball check body
t3 Ball
t4 Spring sheath
t5 Pressure spring
t6 Screw part
t7 O-ring
t7
t6
t5
t4
t3
t1
t2
t1