RING-RETAINER 2074257 - Caterpillar

The 6V4950 Injection Line Speed Pickup Group provides a method of sensing engine speed through the fuel injection lines without disconnecting any of the injection lines. The pickup group can be clamped onto any 6 mm (.25") nominal diameter fuel injection line. The pickup group is then connected to the PH (Photo) input of a 6V2100 Multitach with the cable provided. The multitach then displays the engine speed in R/MIN (rpm). The accuracy of measurement is the same as the original specification for the multitach ( 1 R/MIN); see the NOTE below.The pickup group can be easily installed on any fuel injection line. The only preparation necessary is the removal of a small amount of paint from the injection line where the pickup group is to be clamped. The injection line speed pickup group can be used either for temporary testing or for permanent installation. Modifications must be made to some earlier 6V2100 Multitachs before the speed measurement can be taken accurately. See page 2 for this procedure to determine if modifications must be made to your multitach.Components Of The 6V4950 Injection Line Speed Pickup Group
1. 6V6114 Pickup 2. 6V6113 AmplifierModification Of 6V2100 Multitach
(1) Check your 6V2100 Multitach; if there is an "A" at the location shown, no modifications are needed to the multitach. If there is no "A", modifications must be made to the multitach. See Special Instruction Form SEHS8224 "TROUBLESHOOTING AND REPAIR OF THE 6V2100 MULTITACH", page 23, for the update modifications needed on the multitach. These modifications, if needed, must be made to the multitach to get the correct accuracy of the speed readings.Optional Items For Use With The 6V4950 Injection Line Speed Pickup Group
1. 6V2100 Multitach A programmable digital tachometer used as the speed readout for the injection line speed pickup group.2. 6V4190 Autoprogrammer An accessory for the 6V2100 Multitach which provides automatic programming whenever the multitach is powered and when switching between PH (photo) and MAG (magnetic) inputs.3. 5P7366 Power Cable Used for connecting 11 - 40 VDC power to the multitach.4. 6V2198 Extension Cable Photo input extension cable used for connecting 6V4950 Pickup Group to the 6V2100 Multitach.Specifications
Operation Instructions
IMPORTANT: To avoid personal injury and possible damage to the equipment, always observe the following warnings and cautions when using the injection line speed pickup group.
All bare metal locations on the fuel injection lines must be repainted after removal of the pickup group and before the engine is put back into service. If this is not done, the bare metal fuel injection lines can corrode. This could result in a fire if fuel is sprayed on hot engine parts.
Always install the speed pickup group in a location as far from hot engine parts (such as the exhaust manifold, turbocharger, etc.) as possible.
Keep the cables and amplifier away from hot engine parts.
Do not over-tighten the thumbscrew on the pickup; tighten by hand only. Do not use any tools to tighten the thumbscrew or damage to the pickup may result.
Do not use abrasive materials to