Grundfos VLSE, Installation And Operating Instructions Manual

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9
English (US)
8.3 Wear ring replacement
1. Complete preparations
2. Back-pull rotating assembly,
3. It may be necessary to remove volute (1A) from piping, to
facilitate easy access to interior of volute. If necessary,
remove flange bolts at piping.
4. To remove worn Case Wear Ring (4A), drill two holes slightly
smaller than width of ring into exposed edge of ring.
Once holes are drilled, a chisel may be used to completely
sever ring at holes and break ring into two halves for easy
removal.
5. Clean the ring cavity in the volute prior to installing wear ring
to ensure a properly aligned fit.
6. To reassemble, press fit new wear ring squarely into volute
casing cavity. Ring may be tapped into place to make sure it is
completely impressed into cavity.
8.4 Reassembly of pumps
1. Clean all parts prior to reassembly, ensuring all contacting
surfaces and threads are free of debris. Reassemble pump by
following the above instructions in reverse. Inspect and
ensure the following:
• All mechanical seal components and shaft sleeve must be in
good condition or leakage may result.
• Replacement of complete seal assembly is recommended.
• Appropriate Loctite is used in re-assembly of shaft sleeves.
• Appropriate Loctite is used in re-assembly of threaded
impellers.
2. Re-install coupling guards on coupled pumps.
9. Ordering parts
Grundfos commitment to state-of-the-art pump design and quality
manufacturing assures maximum user benefits with optimum
equipment life at lower cost. Grundfos commitment to their
customers continues through an extensive service organization.
Highly trained technicians can assist customers with initial
startup, troubleshooting, repair, and system analysis.
Grundfos maintains an extensive stock of replacement parts and
parts kits for our most popular model pumps. Shipment of these
parts is normally made within three days after receipt of an order.
On larger pumps, where it is impractical for our factory to
inventory low usage parts, replacement parts are normally
manufactured and shipped within 15 working days of receipt of an
order. In order to reduce pump repair time and shorten
inconvenient pump service interruptions, it is suggested that the
pump user stock spare parts. Since spare parts requirements and
quantities vary for specific pump constructions, allow your
Grundfos Representative to help in defining your spare part
requirements. To ensure that the proper replacement parts are
ordered for your particular pump model, when you call: Identify all
pertinent data from the pump name plate (see Pump
Identification). This should always include the pump Catalog or
Model Number, and the pump Serial Number. For replacement
impellers, also include from the nameplate the operating
conditions (GPM and TDH) and the impeller diameter. Identify all
parts by item number and description as indicated by the
appropriate assembly drawing in this manual, for your particular
pump model.
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Do not use metal tooling against wear ring
surfaces. Use only rubber, rawhide, wood or
other soft material to prevent damage to ring.
Warning
Type VLSE pump is a split coupled pump.
Coupling guard must be reinstalled and in place
prior to operation.