Tachometers
Usage:
3N7288 (Faria Number B-1594-2); Use with 3N4430 Sending Unit
Output to input ratio ... 2 to 1
Range ... 0 to 2500 rpm
Check at full load engine rpm.
Maximum adjustment ... ± 7.5%
Maximum external circuit resistance ... 20 ohms
Maximum operation temperature ... 180° F (82° C)
Maximum of two tachometers to be operated from one sending unit.
(1) Adjustment screw.
(2) Cap.
(3) Rubber washer.
3N7983 (24V) or 3N8160 (32V); Use with 3N7477 Pick-up
Range ... 0 to 500 rpm
Check at ... 375 rpm
Maximum adjustment ... ± 3%
Maximum length of wire between tachometer and pick-up ... 100 ft.(30 m)
Maximum of two tachometers to be operated from one pick-up.
(1) Clearance between pick-up and gear teeth ... .022 to .033 in.(0.56 to 0.84 mm)
(2) Pick-up.
Caterpillar Information System:
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