Sealing Threads On Switches And Sensors That Are Grounded Through The Case
Usage:
When replacing fluid level switches, temperature switches, temperature senders, etc. which are casegrounded through the pipe threads (single wire output) DO NOT use teflon tape to seal the threads. Use pipe sealant such as 5P3413 Pipe Sealant, which contains teflon, to seal liquids and gases up to 149°C (300°F). This only applies to pipe thread type devices. It does not apply to O-ring type devices which need no sealant.
Teflon tape may insulate the electrical connection between the switch (sender) threads and the block or tank causing the device to work incorrectly. In hydraulic applications, teflon tape can also become lodged in valves causing incorrect operation of hydraulic components.
Caterpillar Information System:
1990/10/01 New Temperature Regulators; Regulator Service Hours Changed
1990/10/01 New Exhaust Valves Are Used In Caterpillar Remanufactured Cylinder Heads
1990/10/01 New 4C6090 Multichannel Temperature Selector Available To Aid In Diagnosing Low Power Complaints
1990/10/01 Correct Light Bulb Replacement For The 8T9290 Borescope; New Light Bulb Used
1990/10/01 4C6600 Battery Voltmeter For Determining Battery Percent Of Charge
1990/09/01 Improved Air Motor Lubricator Group
1990/09/01 Improved Water Line Clamps
1990/09/01 New Oil Temperature Regulator Used In Oil Cooler Lines Groups
1990/09/01 New Oil Temperature Regulators Used In Oil Cooler Lines Groups
1990/09/01 Oil Level Gauge Assembly (Dipstick) Guide Tube Length And Gauge Markings May Produce Erratic Oil Level Readings
1990/09/01 Be Sure To Operate Prelube Pump When Engine Is Rotated With Barring Group
1990/09/01 New Bearings And Identification Used In Engine Oil Pump Group
1990/10/01 Improved 3T2357 Horn Switch, 3T3453 Starting Aid Switch, 3T3947 Start Switch, 3T8514 Test Switch Assemblies
1990/10/01 Engine Service Training Literature Uses New Form Number
1990/10/01 List of Service Publications
1990/10/01 Serviced Parts Available For 8C4773 Electric Starting Motor Group
1990/10/01 Additional Clip And Hardware Prevent Damage To Fuel Line Of 4W6887 Instrument Panel
1990/10/01 New "On Engine" Adjustment Procedure For 3161 Woodward Governor
1990/10/01 Add Bolt Dampers To Oil Pump Mounting Bolts To Prevent Bolt Failures
1990/10/01 New Pump Group With Bolt Dampers Used In Oil Pump Group
1990/10/01 Engine Commissioning And Diagnostic Kit
1990/10/01 New Air Shutoff Groups Prevent Air Leaks And Wear
1990/10/01 Increased Tension Applied To Cylinder Head Studs
1990/10/01 New Oil Filler Group Prevents Oil Loss When Filling With Engine Running