PH52W Seal Kit - TB211201
Issue Date: Dec. 13, 2021
Scope: PH52W Coolant Heaters / 5kW Engine Heaters
Complaint:
Heater leaking coolant.
Resolution:
See also TB-210204 Coolant Leaks.
It has been discovered that in some cases the PH52W heater can have premature failure of “O” Ring seals which can result in coolant leaking.
A seal kit has been developed which includes all required seals for this heater.
These seals are made from Viton which improves their ability to withstand higher temperatures while main- taining their sealing properties.
PH52W Seal Kit
Part Number: P52W-X801
Contains:
1 of Heat Exchanger “O” Ring
2 of Temperature Sensor “O” Rings
2 of Inlet /Outlet Port “O” Rings
Corrective Action:
Future production units will be upgraded with high temperature “O” Ring Seal materials.
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