diff --git a/src/TKBRep/TKBRep_pch.hxx b/src/TKBRep/TKBRep_pch.hxx
index 579a23c228..341ed29b7a 100644
--- a/src/TKBRep/TKBRep_pch.hxx
+++ b/src/TKBRep/TKBRep_pch.hxx
@@ -13,12 +13,7 @@
 #include <TopoDS_Vertex.hxx>
 #include <TopoDS_Wire.hxx>
 
-#include <BRepAdaptor_Curve.hxx>
-#include <BRepAdaptor_Surface.hxx>
-#include <BRepTools_History.hxx>
 #include <BRep_Builder.hxx>
 #include <BRep_Tool.hxx>
 
-#include <BRepTools.hxx>
-
 #endif // TKBRep_HXX
\ No newline at end of file
diff --git a/src/TKService/CMakeLists.txt b/src/TKService/CMakeLists.txt
index 2107f21b64..244d748b4a 100644
--- a/src/TKService/CMakeLists.txt
+++ b/src/TKService/CMakeLists.txt
@@ -4,6 +4,4 @@ OCCT_INCLUDE_CMAKE_FILE (adm/cmake/occt_toolkit)
 
 if (APPLE AND BUILD_USE_PCH)
   set_target_properties(TKService PROPERTIES DISABLE_PRECOMPILE_HEADERS ON)
-else()
-  ADD_PRECOMPILED_HEADER(TKService "${CMAKE_CURRENT_SOURCE_DIR}/TKService_pch.hxx")
 endif()
diff --git a/src/TKService/TKService_pch.hxx b/src/TKService/TKService_pch.hxx
deleted file mode 100644
index c5c7b16f67..0000000000
--- a/src/TKService/TKService_pch.hxx
+++ /dev/null
@@ -1,36 +0,0 @@
-#ifndef TKSERVICE_PCH_H
-#define TKSERVICE_PCH_H
-
-// Windows-specific headers (for MSVC)
-#ifdef _WIN32
-  #ifndef NOMINMAX
-    #define NOMINMAX
-  #endif
-  #include <tchar.h>   // For Unicode/MBCS mappings
-  #include <windows.h> // For Windows API functions like WideCharToMultiByte
-  #ifdef GetObject
-    #undef GetObject
-  #endif
-#endif
-
-#include <Graphic3d_ArrayOfPrimitives.hxx>
-#include <Graphic3d_Aspects.hxx>
-#include <Graphic3d_BoundBuffer.hxx>
-#include <Graphic3d_CStructure.hxx>
-#include <Graphic3d_CView.hxx>
-#include <Graphic3d_Camera.hxx>
-#include <Graphic3d_ClipPlane.hxx>
-#include <Graphic3d_GraduatedTrihedron.hxx>
-#include <Graphic3d_Group.hxx>
-#include <Graphic3d_IndexBuffer.hxx>
-#include <Graphic3d_LightSet.hxx>
-#include <Graphic3d_MaterialAspect.hxx>
-#include <Graphic3d_SequenceOfHClipPlane.hxx>
-#include <Graphic3d_ShaderProgram.hxx>
-#include <Graphic3d_TextureRoot.hxx>
-#include <Graphic3d_TextureSet.hxx>
-#include <Graphic3d_TransformPers.hxx>
-#include <Graphic3d_WorldViewProjState.hxx>
-#include <Graphic3d_ZLayerSettings.hxx>
-
-#endif // TKSERVICE_PCH_H
diff --git a/src/TKernel/TKernel_pch.hxx b/src/TKernel/TKernel_pch.hxx
index 31ae1fedda..e748935356 100644
--- a/src/TKernel/TKernel_pch.hxx
+++ b/src/TKernel/TKernel_pch.hxx
@@ -3,13 +3,7 @@
 
 // Standard library headers
 #include <atomic>
-#include <iostream>
-#include <limits>
-#include <ostream>
-#include <sstream>
-#include <string>
 #include <type_traits>
-#include <vector>
 
 // Windows-specific headers (for MSVC)
 #ifdef _WIN32
@@ -37,12 +31,8 @@
 
 #include <Quantity_Color.hxx>
 #include <Quantity_ColorRGBA.hxx>
-#include <Quantity_HArray1OfColor.hxx>
 #include <Quantity_TypeOfColor.hxx>
 
-#include <TColStd_HArray1OfInteger.hxx>
-#include <TColStd_HSequenceOfHAsciiString.hxx>
-#include <TColStd_HSequenceOfTransient.hxx>
 #include <TCollection_AsciiString.hxx>
 #include <TCollection_ExtendedString.hxx>
 #include <TCollection_HAsciiString.hxx>