White S4A Installation And Operating Manual page 13

SERVICING AND MAINTENANCE INSTRUCTIONS
S4 SERIES
DISMANTLING
REMOVAL OF THE VALVE BODY (117): Unscrew the four screws (52), which hold the strainer and cable
guard. Remove the strainer (42) and cable guard (39). Loosen and remove the nuts and washers that attach the
pump to the motor and separate the pump and motor. Using an oil filter wrench grip the liner (69) and secure
the wrench in a vice. Use a spanner to unscrew the valve body (117) from the liner (69). N.B. The thread is left
hand. Take care to unscrew the components in the correct direction.
REMOVAL OF THE PUMP LINER (69): Grip the pump support (3) in a vice taking care not to damage the
support. Using an oil filter wrench, unscrew the liner (69) from the pump support (3). N.B. The thread is left
hand. Take care to unscrew the components in the correct direction.
DISMANTLING THE STAGES: Remove the upper support (57) complete with pilot bush (270), unscrew and
remove the nut (18) and the washer (66). Slide off each stage comprising of diffuser (6), impeller (4), wear ring
(191) and diffuser body (98). N.B. Some models have one or two intermediate supports (57) complete with
pilot bush (271) and shaft sleeve (58). With a texta mark these supports as the intermediate support and note
their position with respect to the pump stages. When all stages have been removed, the spacer bush (55) can
be slid from the shaft.
ASSEMBLY OF THE STAGES
Fit the pump shaft (7) onto the motor and ensure that the coupling engages fully. Fit the spacer bush (55) and
the support (3) over the shaft. Secure the support with the motor nuts and washers. Fit the first diffuser body
(98) on to the support, followed by the first wear ring (191) and the first impeller (4). Ensure that the impeller
metal neck ring fits inside the wear ring. Fit the first diffuser with the conical section of the diffuser's internal
wear ring facing up. Repeat this for all stages taking care that impellers fit inside wear ring. Some models will
require their intermediate supports (57) complete with pilot bush (271) and shaft sleeve (58) to be fitted at the
locations that were previously marked. Fit the washer (66) and tighten the nut (18), and fit the upper support
(57) complete with pilot bush (270).
FITTING OF THE PUMP LINER (69): Grip the pump support (3) in a vice taking care not to damage the
support. Using an oil filter wrench, screw the liner (69) onto the pump support (3). N.B. The thread is left hand.
Take care to tighten the components in the correct direction.
FITTING OF THE VALVE BODY (117): Using an oil filter wrench, grip the liner (69) and secure the wrench in a
vice. Use a spanner to screw the valve body (117) into the liner (69). N.B. The thread is left hand. Take care to
tighten the components in the correct direction. Fit the strainer (42) and cable guard (39) using the four screws
(52).
DAB Submersible Pump Installation Instructions 2013 rev 1
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