Section 12 - Lavatory Repairs LAVATORY REPAIR Replacement Solenoid Guide For Chicago Hytronic Faucets Replacement Solenoid Guide Over the years, the HyTronic housing and solenoid have undergone several improvements. This may lead to some confusion about which replacement parts to use when repairing these faucets. Please use this guide to identify your HyTronic model and the correct solenoid replacement part. 1st Generation All-brass valve body with white solenoid Removal Steps Shut off water supply and remove spout: * Step 1 Unplug solenoid wire connectors * Step 2 Use a 17mm socket to loosen solenoid * Step 3 Using pliers, pull up and remove solenoid 1 Item Cat.# 37023 OEM# 242.981.AB.1 Description 1st Generation All Brass Valve Body With White Solenoid (Replaces White Solenoid) 37023 Valve body shown for reference purposes only 2nd Generation White plastic valve body with white solenoid and black bonnet Removal Steps Shut off water supply and remove spout: * Step 1 Unplug solenoid wire connectors * Step 2 Pull batery holder away from solenoid bonnet * Step 3 Remove bonnet retainer screws and retainer * Step 4 Using pliers, pull up to remove solenoid 1 2 Item Cat.# 40136 37024 OEM# 242.980.AB.1 Description 2nd Generation White Plastic Valve Body With White Solenoid and Black Bonnet 242.978.AB.1 For PCA Faucets (Shown Installed On Valve Body) 37024 Valve body shown for reference purposes only 12-128 PHONE 800-772-2347 FAX 800-991-6275https://www.markspp.com/Catalog/Detail/5 https://www.markspp.com/Catalog/Detail/191455 https://www.markspp.com/Catalog/Detail/191455 https://www.markspp.com/Catalog/Detail/5 https://www.markspp.com/Catalog/Detail/6 https://www.markspp.com/Catalog/Detail/190565 https://www.markspp.com/Catalog/Detail/191457 https://www.markspp.com/Catalog/Detail/191457