Slurry Pump
WH18AM12AA0EN_01F.DOC JAN 04-W08
Care and maintenance
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c) Remove nuts (W20) from the four back liner bolts (W19) and withdraw back
liner (W4). The bolts are retained in position by a rubber strap.
WARNING
BACK-LINERS ON LARGE PUMPS ARE EXTREMELY HEAVY. USE THE BACK-LINER LIFTING TOOL
RECOMMENDED IN SECTION 9.3.
3. Inspection
a) Clean and inspect case (W1), impeller (W3) and back-liner (W4) for severe
scoring, extensive wear, pitting, corrosion and damage. Renew if necessary.
b) Inspect back-liner seal (W6). Renew it , if it shows any signs of damage.
c) Refer to sections 9.5.3 and 9.5.4 for Shaft Seal and Bearing Maintenance.
4. Assembly
a) Ensure that the impeller release mechanism, where applicable, and the shaft
seal components are in position. See parts list drawings in section 10 for
details.
b) Fit back-liner seal (W6) into the groove around back-liner (W4). Grease the
seal to aid assembly.
c) Locate back-liner bolts (W19) into the lugs around back-liner (W4) and retain in
position with back-liner bolt retaining strap (W18).
d) Offer back-liner (W4) to the frame, engaging back liner bolts (W19) in the frame
holes.
WARNING
WHERE APPLICABLE, USE THE BACK-LINER LIFTING TOOL RECOMMENDED IN SECTION 9.3.
e) Fit and tighten nuts (W20) to the correct torque (refer to sub-section 11.1).
NOTE:WHEN FITTING NEW PARTS TO PUMPS FITTED WITH EXPELLER TYPE SHAFT SEALS,
IT MAY BE NECESSARY TO ADJUST THE BEARING ASSEMBLY AXIALLY USING THE
ADJUSTING SCREW TO PREVENT THE EXPELLER FOULING THE BACK LINER.
f) Clean the thread on the shaft and grease with appropriate lubricant or anti-seize
compound.
g) Fit impeller gasket (W17).
h) Lift impeller as shown in Figure 9.5.2-A and mount it onto the shaft end.
i) Block impeller (W3) using a bar inserted in between two of its vanes, then turn
the shaft with the special crank-handle until the impeller is locked tight –refer to
sub-section 9.3.
j) Set the impeller back clearance, where applicable – see section 9.5.1.
k) Apply grease liberally around back-liner seal (W6) to assist entry into case
(W1).
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