1988/03/28 Caterpillar

New 1U6602 Tachometer Group Available{0775,0781}

Usage:

Reference: Special Instruction, SEHS8854, "Using the 1U6602 Photo-Tach Group."

The 1U6602 Tachometer Group provides an accurate, digital, noncontact, method for the measurement of rotational engine speed. It measures revolutions per minute by directing an integral light source onto a reflective marker on the rotating object and counting the reflected light pulses. The 1U6602 Tachometer Group can be used to measure the rotational speed on any product where a piece of reflective tape can be placed.

With a 4 1/2 digit liquid crystal display (LCD), the 1U7771 Tachometer provides noncontact measurement of rotational speed over the range of 50 to 20,000 rpm with an accuracy of ±1 rpm. The Special Instruction gives details on specifications, operation, warranty and repair.

1U6602 Tachometer Group.

1. 6V3073 Plastic Case.

2. 1U7772 Foam Block.

3. 1U7771 Tachometer.

4. "AA" Batteries (four required).

5. 1U6605 Reflective Tape.

6. 1U6603 110/220 V AC Recharger-optional.
1U7445 Nickel Cadmium Battery-optional (four required, not shown).

Caterpillar Information System:

1988/03/21 New Power Pad Housings With Needle Bearings Used In Fuel Injection Control Groups{1264}

1988/03/21 New Publication Available-"Diesel Fuels And Your Engine"{0374,0375,0645}

1988/03/21 Service Tools For Reintjes Marine Gears{0723}

1988/03/14 New Connecting Rod Assembly Used{1218}

1988/03/14 New Auxiliary Water Pump Group Used{1371}

1988/03/14 Use The Correct Oil In Spark-Ignited Engines{1300}

1988/03/14 Magnetic Switches (Starter Relays) Improved{1450}

1988/03/14 Be Sure Battery Cable-To-Starter Connection Has Correct Torque{1453}

1988/03/14 New 1U8761 Portable Hydraulic Tester Available{0784,0774,0770,0776}

1988/03/07 Install New Temperature Regulators Every 7500 Hours Or After One Year{1318,1330,1350,1355}

1988/03/07 Updated Executive Program Module Available For The 8T8697 Electronic Control Analyzer Programmer (ECAP){0781,0782,0600}

1988/03/07 Updated 8C5919 3406B PEEC Service Program Module Available{0781,0782}

1988/03/28 Polarity Corrections On Wiring Diagrams{4450}

1988/04/04 Sealed Beam Halogen Lamps Are Available{7309}

1988/04/04 Method To Reduce Indicator Contact Point Breakage{0760}

1988/04/04 Use Improved Heat Start Switch{1416}

1988/04/04 Stepped Compression Ring Temporarily Used{1214,1215}

1988/04/04 Fuel Ratio Control Diaphragms And Settings On 3161 Governors{1278}

1988/04/18 Extraction Tools For "Live Oil Sampling"{7770,0770,0781,0783,0784}

1988/04/18 Some Components Of The Variable Pulley And Adjustable Pulley On The Kent-Moore Fuel Injection Test Bench Are Available From Caterpillar{0782}

1988/04/18 1" 8T9141 Offset Sledging Wrench Available{0602}

1988/04/18 How To Identify Failures To Electric Jacket Water Heaters{1383}

1988/04/18 Former Exhaust Valve Bridge For Jacobs Brake® Interferes With 40 mm Nozzle Adapter; New Bridge Used{1119,1100}

1988/04/18 Modification To Prevent Oil Leaks Around Governor Control Shaft{1265,1287}