4V6749 LOCKNUT Caterpillar parts
824C, 980C, 980F, D35C, D35HP, D44B, D550B
Rating:
Alternative (cross code) number:
CA4V6749
4V-6749
4V6749
CA4V6749
4V-6749
4V6749
Weight: 0.010 pounds 0 kg.
ARTICULATED TRUCK, WHEEL LOADER,
Compatible equipment models: 4V6749:
Number on catalog scheme:
24
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Information:
Often when problems with the charging system are being investigated, the alternator is not the problem. If a low battery condition is present test the batteries first. See Special Instruction, SEHS7633, "Battery Test Procedure" for more information. If the engine cranks slowly, then test the starting system. See Service Magazine, SEPD0020, "Testing The Starter On The Engine" for more information. If a warning indicator for the charging system is ON, see Service Magazine, SEBD1751, "Difference Between Alternator Indicator In Electronic Monitoring System (EMS) And Low Voltage Indicator In Operating Monitoring System (OMS)". When a problem with the charging system is suspected, then complete the testing that is outlined in this Special Instruction. See "Initial Troubleshooting Procedure" in order to begin troubleshooting. The procedures in this Special Instruction are designed to guide you to the problem with as little testing as possible. In most cases, you will only use a few of the tests to diagnose a problem. The tests are labeled as T1 - T8 for easy reference. A descriptive title for each test is included as well. Initial Troubleshooting Procedure
CHECK THE RESISTANCE IN THE EXCITATION CIRCUIT. This step is only for alternators with external excitation when the terminal for excitation is labeled: "1", "REG" and "D+". See "Alternator Specifications" if the method of excitation is unknown. Go to 3 if your alternator is self-excited. Go to 2 for alternators that have an "IG" excitation terminal.
If the generator set is equipped with a disconnect switch, then turn the disconnect switch to the ON position.
Verify voltage at the excitation terminal. Connect the red lead from a multimeter to the excitation terminal. Connect the black lead to a ground source (alternator case ground).
Read the voltage that is shown on the multimeter.Expected Result: The voltage reads at least .2 volts.Results:
YES - The voltage reads .2 volts or more. The excitation circuit is correct. Proceed to 3.
NO - The voltage is less than .2 volts. There is a fault in the wiring harness to the alternator or there is a poor electrical connection. Correct the problem. Watch for
CHECK THE RESISTANCE IN THE EXCITATION CIRCUIT. This step is only for alternators with external excitation when the terminal for excitation is labeled: "1", "REG" and "D+". See "Alternator Specifications" if the method of excitation is unknown. Go to 3 if your alternator is self-excited. Go to 2 for alternators that have an "IG" excitation terminal.
If the generator set is equipped with a disconnect switch, then turn the disconnect switch to the ON position.
Verify voltage at the excitation terminal. Connect the red lead from a multimeter to the excitation terminal. Connect the black lead to a ground source (alternator case ground).
Read the voltage that is shown on the multimeter.Expected Result: The voltage reads at least .2 volts.Results:
YES - The voltage reads .2 volts or more. The excitation circuit is correct. Proceed to 3.
NO - The voltage is less than .2 volts. There is a fault in the wiring harness to the alternator or there is a poor electrical connection. Correct the problem. Watch for
Caterpillar parts catalog:
Parts locknut Caterpillar catalog:
10 FT, 10-20B, 10B, 120H, 120H ES, 120H NA, 120K, 120M, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 12M 3 AWD, 130G, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140M, 140M 2, 140M 3, 140M 3 AWD, 143...
120, 120B, 120H, 120H ES, 120H NA, 120K, 120K 2, 12E, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140, 140B, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 14H, 14H NA, 160H, 160H ES, 160H NA, 160K, 163H, 1...
16, 1693, 245, 245B, 245D, 3406, 3406B, 3406E, 3408, 3408B, 3408C, 3408E, 3412, 3412C, 3412E, 3508, 3508C, 3512, 3516, 5130, 5230, 589, 594, 621E, 621F, 623E, 627E, 627F, 631C, 631D, 631E, 633E II, 63...
120, 12E, 16, 1673, 1673B, 1673C, 1674, 1676, 1693, 16G, 215, 245, 3304, 3306, 3406, 3408, 3412, 561B, 561C, 621, 621B, 621R, 623, 627, 631C, 633C, 637D, 641B, 650B, 651E, 657B, 657E, 768B, 769, 769C,...
3306, 3408, 3412, 824C, 826C, 955H, 977H, 980C, D8H, D8K, D9E
12E, 227, 30/30, 307, 312, 315, 317, 320B, 322B L, 325B L, 330 L, 330B L, 345B, 345B II, 345B II MH, 350, 3508, 3508B, 3512, 3512B, 3512C, 3516, 3516B, 3516C, 375, 375 L, 5080, 518, 518C, 5230B, 613, ...
1693, 3406B, 3406C, 572G, 583K, 589, 621B, 621E, 621F, 621G, 623E, 623F, 623G, 627E, 627F, 627G, 651B, 657B, 824C, 826C, 834B, 980C, 980F, 988B, AD55, D343, D350E, D353C, D400E, D8L, D9L, D9N, D9R, G3...
1140, 1145, 1150, 1160, 120G, 120H, 120H NA, 120K, 120K 2, 12G, 12H, 12H NA, 12K, 130G, 135H, 135H NA, 140G, 140H, 140H NA, 140K, 140K 2, 143H, 14G, 160G, 160H, 160H NA, 160K, 163H NA, 16G, 16H NA, 22...
12G, 14G, 14H, 14H NA, 153, 16G, 16H, 16H NA, 215, 215B, 215D, 225, 227, 229, 235, 235B, 235C, 235D, 245, 245B, 245D, 24H, 3512C, 3516, 3516B, 3516C, 375, 375 L, 385B, 385C, 385C FS, 385C L, 390D, 390...
14G, 14H, 14H NA, 24H, 24M, 25, 5110B, 528, 589, 7241, 773F, 773G, 773G LRC, 773G OEM, 775F, 775G, 775G LRC, 775G OEM, 777F, 777G, 824C, 834B, 836, 844, 844H, 844K, 980, 980B, 980C, 988B, 988F, 988F I...
24M, 349E, 349E L, 349E L HVG, 349E L VG, 349F L, 365C, 365C L, 365C L MH, 374D L, 374F L, 385C, 385C FS, 385C L, 385C L MH, 390D, 390D L, 390F L, 583T, 587T, 621B, 621F, 621G, 621H, 621K, 623E, 623F,...
120, 120B, 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, 130G, 135H, 135H NA, 140, 140B, 140G, 140H, 140H ES, 140H NA...
824C, 826C, 834B, 980C, 988B, D44B, D550B, D7F, D7G
4V6732
LOCKNUT
992C
992C
1390, 2590, 320 L, 320B, 320C, 320N, 322 LN, 322B, 322B L, 322B LN, 322C, 322C FM, 323D L, 324D, 324D L, 324D LN, 324E, 324E L, 324E LN, 325, 325 L, 325 LN, 325B, 325B L, 325C, 325C FM, 325C L, 325D, ...
1673890
LOCKNUT
824G, 825G, 826H, 980G
824G, 825G, 826H, 980G
9X8254
LOCKNUT-BULKHEAD
910E, IT12B, IT14B
910E, IT12B, IT14B
7P2060
LOCKNUT
926
926
322B L, 322C, 322C FM, 324D, 324D FM, 324D FM LL, 325B L, 325C, 325D L, 328D LCR, 330, 330 FM L, 330 L, 330B, 330B L, 330C, 330C FM, 330C L, 330D, 330D FM, 330D L, 330D LN, 336D, 336D L, 336D LN, 336D...
1390, 2590, 320B, 320C, 320D, 320D FM, 320D2, 320D2 L, 322B L, 322B LN, 322C, 322C FM, 323D L, 323D LN, 323D SA, 324D, 324D FM, 324D FM LL, 324D L, 324D LN, 325B L, 325C, 325C FM, 325D, 325D FM, 325D ...
1453171
LOCKNUT-SEAL
365B, 365B II, 365B L, 365C, 365C L, 365C L MH, 374D L, 385B, 385C, 385C FS, 385C L, 385C L MH, 390D, 390D L, 5090B, 5110B, 5230, 5230B, 550, 550B, 570, 570B, 580, 580B, 793D, 793F, 793F AC, 793F CMD,...
365B, 365B II, 365B L, 365C, 365C L, 365C L MH, 374D L, 385B, 385C, 385C FS, 385C L, 385C L MH, 390D, 390D L, 5090B, 5110B, 5230, 5230B, 550, 550B, 570, 570B, 580, 580B, 793D, 793F, 793F AC, 793F CMD,...
5080, 5110B, 5130, 5130B, 990, 990 II, 990K, 992G, 992K, R1600G, R1600H
950F II, 966F II, 970F, CB-224C
784B, 784C, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D, 793, 793B, 793C, 793D, 793F, 793F AC, 793F CMD, 793F OEM, 793F-XQ, 844, 844H, 854G, 854K, 990 II, 990H, 992D, 992G, 992K, 993K, 994, 994D, 994...