7D9749 SEAL-O-RING Caterpillar parts
12F, 14E, 173B, 183B, 215, 3304, 3606, 3608, 3612, 3616, 416, 426, 428, 578, 613C II, 657B, 666, 768B, 769, 824K, 844, 844H, 844K, 931, 931B, 933, 933C, 980H, 988K, 990K, 992, 992C, 992D, AP-1055D, AP...
Rating:
Alternative (cross code) number:
CA7D9749
7D-9749
7D9749
CA7D9749
7D-9749
7D9749
Weight: 0.01 pounds 0 kg.
Information:
CROSS SECTION DIAMETER
2.62
mm
DASH SIZE
133
ID
45.69
mm
MATERIAL
Nitrile (NBR) Rubber - 75 Duro
OD
0
mm
ASPHALT PAVER, WHEEL TRACTOR,
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$8.06
09 Apr 2022
US: Florida-Parts-Z
364108R1 - O Ring 7d9749 fits Caterpillar (CAT)
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09 Apr 2022
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364108R1 - O Ring 7d9749 fits Caterpillar (CAT)
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$11.58
09 Apr 2022
US: Florida-Parts-Z
7D9749 - Seal-O-Ring for Caterpillar (CAT)
FIRST PRICE PARTS
FIRST PRICE PARTS
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2024-04-25
2024-03-08
2021-11-10
2020-10-12
Number on catalog scheme:
22
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Compatible equipment models: 7D9749:
Information:
The following procedure is intended to help the technician to determine if the starting motor needs to be removed, replaced, or repaired. The procedure is not intended to cover all possible problems and conditions. The procedure is used only as a guide. A common 24 V circuit is shown. This 24 V circuit will be discussed. The 12 V circuit is indicated as being applicable. On machines that are equipped with a diagnostic connector, the 6V-2150 Starting/Charging Analyzer performs the following procedure in seconds. The Special Instruction, SEHS7768 is provided with the analyzer.
Illustration 1 g00584419
Typical 24 V Starting Circuit (1) Test point. (2) Test point. (3) Test point. (4) Test point. (5) Test point. (X) Hold-in coil. (W) Pull-in coil. General Information
All starting systems are made up of four elements. The elements are the key start switch, the start relay, the starting motor solenoid, and the starting motor. The start relay may not be required on smaller engines. In this case, the start switch powers the starting motor solenoid directly. Start switches are relatively low current devices. Start switches are designed to operate properly at 5 A to 20 A. The coil of a start relay between test point (1) and test point (2) draws about 1 A. The start switch easily turns on the start relay. The start relay can have a long life cycle. The contacts on a start relay are rated between 100 A and 300 A when the contacts are switched. Because a solenoid requires 5 A to 50 A, the start relay can easily switch this load. The solenoid engages the pinion with the flywheel. The solenoid is a high current switch that is rated at about 1000 A. The solenoid activates the starting motor. The starting motor solenoid has two coils. Pull-in coil (W) draws about 40 A and the hold-in coil (X) requires about 5 A. When the start relay closes, both coils (W) and (X) receive power. Battery voltage is applied to the high end of both coils. Battery voltage is applied at test point (3) . Test point (3) and the start terminal (S) are located at the same points. The low end of hold-in coil (X) is permanently grounded to the ground post of the starting motor. Grounding for the low end at test point (4) of the pull-in coil (W) is momentary. Grounding takes place through the DC resistance of the starting motor. When the magnetic force is built up in both coils, the pinion moves toward the flywheel ring gear. The pinion will stop short of engaging the flywheel ring gear. Power is applied to the starting motor when the solenoid contacts close. This will temporarily remove the ground from the pull-in coil (W) . Battery voltage is placed on both ends of the pull-in coil (W) while the motor cranks. During this period, the pull-in coil is out of the circuit. Cranking continues until power to the solenoid is broken by releasing the key start switch.
Illustration 1 g00584419
Typical 24 V Starting Circuit (1) Test point. (2) Test point. (3) Test point. (4) Test point. (5) Test point. (X) Hold-in coil. (W) Pull-in coil. General Information
All starting systems are made up of four elements. The elements are the key start switch, the start relay, the starting motor solenoid, and the starting motor. The start relay may not be required on smaller engines. In this case, the start switch powers the starting motor solenoid directly. Start switches are relatively low current devices. Start switches are designed to operate properly at 5 A to 20 A. The coil of a start relay between test point (1) and test point (2) draws about 1 A. The start switch easily turns on the start relay. The start relay can have a long life cycle. The contacts on a start relay are rated between 100 A and 300 A when the contacts are switched. Because a solenoid requires 5 A to 50 A, the start relay can easily switch this load. The solenoid engages the pinion with the flywheel. The solenoid is a high current switch that is rated at about 1000 A. The solenoid activates the starting motor. The starting motor solenoid has two coils. Pull-in coil (W) draws about 40 A and the hold-in coil (X) requires about 5 A. When the start relay closes, both coils (W) and (X) receive power. Battery voltage is applied to the high end of both coils. Battery voltage is applied at test point (3) . Test point (3) and the start terminal (S) are located at the same points. The low end of hold-in coil (X) is permanently grounded to the ground post of the starting motor. Grounding for the low end at test point (4) of the pull-in coil (W) is momentary. Grounding takes place through the DC resistance of the starting motor. When the magnetic force is built up in both coils, the pinion moves toward the flywheel ring gear. The pinion will stop short of engaging the flywheel ring gear. Power is applied to the starting motor when the solenoid contacts close. This will temporarily remove the ground from the pull-in coil (W) . Battery voltage is placed on both ends of the pull-in coil (W) while the motor cranks. During this period, the pull-in coil is out of the circuit. Cranking continues until power to the solenoid is broken by releasing the key start switch.
Cat SIS web machinery list:
Parts seal Caterpillar catalog:
120, 120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 12E, 12F, 12G, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 12M 3 AWD, 135H, 135H NA, 140, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 14...
992C, 992D
D7G, D8H, D8K
D9H
D8L
D9N
14E, 16
14E, 16
120, 120B, 12E, 140, 140B, 14E
120B, 12E, 12F, 140, 140B, 14E
12G, 130G, 140, 140B, 140G, 14E, 14G, 16G
8T4828
SEAL
426, 428
426, 428
212, 214, 428
1090, 1190, 1190T, 1290T, 1390, 1673C, 173B, 183B, 193, 2290, 235, 235B, 235C, 235D, 2390, 2391, 245, 245B, 2491, 2590, 3304, 3306, 3306B, 3306C, 3408, 3408B, 3412, 350, 365B, 365B II, 365B L, 365C, 3...
416, 426, 428
8T1671
SEAL
426
426
9R1827
SEAL (L.H.)
426, 428
426, 428
426, 428
426, 428
416, 428, D7H
416, 428
12G, 130G, 140G, 14G, 160G, 16G, 3S, 426, 428, 4S, 518, 528, 561C, 561D, 613, 613B, 613C, 65, 814, 814B, 814S, 815, 815B, 825C, 826B, 910, 920, 930, 930R, 931, 931B, 931C, 941, 943, 950, 951B, 953, 95...
12G, 130G, 140G, 14E, 14G, 16, 160G, 16G, 3S, 426, 428, 4A, 4S, 518, 528, 561C, 561D, 571G, 572G, 583K, 594, 594H, 613, 613B, 613C, 633, 65, 657, 6A, 814, 814B, 814S, 815, 815B, 816, 824S, 825C, 826B,...