Kohler — Install Impeller
Repair & overhaul
From a Kohler service manual covering: WA 2.0, WA 3.0, WB 2.0, WB 3.0. Check it applies to your exact model before use.
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Before you start
- Before placing rotating seal into impeller, put liquid detergent on seal to ease installation.
Procedure
- Replace shim(s) with same amount that was taken off.
- Install rotating seal into backside of impeller; ensure not kinked and placed straight.
- Turn impeller clockwise by hand until tight.
- Using a rubber mallet, tap 1 blade clockwise to tighten impeller until resistance is observed.
- Place volute against pump case and check clearance with a feeler gauge.
- Clearance larger than 1.2 mm requires another shim; less than 0.4 mm requires removing a shim.
- Remove volute.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Volute to impeller clearance 0.4 mm (0.0157 in.) to 1.2 mm (0.0472 in.)
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.