Wilo T 12 Notice De Montage Et De Mise En Service page 112

en
9.7.2 Which repair work may be carried
out
9.7.3 Changing the hydraulics housing
Fig. 26: Changing the hydraulics housing
112
Maintenance and repair
thread-locking fluid cannot be loosened, then the compound must be heated to ap-
prox. 300 °C (572 °F). Clean the components thoroughly after dismantling.
Mechanical screw locking device
The mechanical screw locking device consists of two Nord-Lock wedge lock washers.
The screw connection is secured by the clamping force. The Nord-Lock screw locking
device must only be used on bolts with strength class 10.9 which have been coated
with Geomet. The use of stainless screws is prohibited!
▪ Changing the hydraulics housing.
▪ SOLID G- and Q impeller: Readjusting the suction port.
DANGER
Dismantling the impeller is prohibited!
Depending on the impeller diameter, the impeller must be removed for dismantling
the hydraulics housing on some pumps. Before carrying out any work, check whether
dismantling the impeller is necessary. If yes, notify customer service! The dismant-
ling of the impeller must be carried out by customer service or an authorized special-
ist workshop.
1 Hexagon nuts for fixation of the motor/hydraulics
2 Hydraulics housing
1
3 Threaded bolt
‡
Lifting equipment with sufficient bearing capacity is present.
‡
Protective equipment has been put on.
‡
New hydraulics housing is ready.
‡
Impeller must not be dismantled!
1. Attach lifting equipment with suitable lifting gear to the attachment point of the
pump.
2. Place the pump upright.
3
CAUTION! If the pump is placed down too quickly, the hydraulics housing at the
suction port can be damaged. Place the pump down slowly on the suction port!
2
NOTICE! If the pump cannot be placed level on the suction port, use appropriate
adjustment plates. In order for the motor to be lifted without any problem, the
pump must be vertical.
3. Mark the motor/hydraulics position on the housing.
4. Loosen and remove hexagon nuts on the hydraulics housing.
5. Slowly lift the motor and pull it off the threaded bolts.
CAUTION! Lift the motor vertically and do not tilt! The threaded bolts will be
damaged if tilted!
6. Swivel the motor over the new hydraulics housing.
7. Slowly drain the motor. Make sure that the motor/hydraulic markings match and
the threaded bolts screw exactly into the holes.
8. Screw hexagon nuts and connect the motor to the hydraulics firmly. NOTICE! Ob-
serve the tightening torques in the appendix!
▶ Hydraulics housing changed. Pump can be reinstalled.
WARNING! If the pump is placed in temporary storage and the lifting equipment dis-
mantled, secure the pump against falling over and slipping!
WILO SE 2019-01