NUT-FLANGE 8W3891 - Caterpillar

8W3891 NUT-FLANGE Caterpillar parts 784B, 784C, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D

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Alternative (cross code) number:
CA8W3891
8W-3891
8W3891

Weight: 0.50 pounds 0 kg.

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TRACTOR, TRUCK,

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Compatible equipment models: 8W3891:

TRACTOR 784B 784C

TRUCK 785 785B 785C 785D 789 789B 789C 789D Caterpillar

Number on catalog scheme: 22

Caterpillar 8W3891 Parts scheme NUT-FLANGE

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The illustrations below show The M1 series alternator (35 amps).Negative Diode Check
Illustration 1 g00825570
Negative Diode Check (9) Stator leads (10) "B-" terminal (11) Stator lead connection
Disconnect all stator leads (9) from the rectifier.
Set the multimeter to the diode scale.
Connect the multimeter leads across one stator lead connection (11) and "B-" terminal (10) .
Record the multimeter reading.
Reverse the multimeter leads.
Record the multimeter reading.Expected Result: One reading is "0L" and the other reading is .4 to .9 volts.Results:OK - One reading is "0L" and the other reading is .4 to .9 volts. The diode is normal. Repeat steps 1 through 6 for the other stator lead connections (11). STOP.NOT OK - Both readings are "00". The diode is shorted. Replace the rectifier. STOP.NOT OK - Both readings are "0L". The diode is open. Replace the rectifier. STOP.Note: The 35 amp alternator has three negative diodes and three stator leads. The remaining alternators have four negative diodes and four stator leads.Positive Diode Check
Illustration 2 g00825571
Positive diode check (9) Stator leads (11) Stator lead connection (12) "B+" terminal
Stator leads (9) remain disconnected from the rectifier.
The multimeter remains on the diode scale.
Connect the multimeter leads across one stator lead connection (11) and "B+" terminal (12) .
Record the multimeter reading.
Reverse the multimeter leads.
Record the multimeter reading.Expected Result: One reading is "0L" and the other reading is .4 to .9 volts.Results:OK - One reading is "0L" and the other reading is .4 to .9 volts. The diode is normal. Repeat steps 1 through 6 for the other stator lead connections (11). STOP.NOT OK - Both readings are "00". The diode is shorted. Replace the rectifier. STOP.NOT OK - Both readings are "0L". The diode is open. Replace the rectifier. STOP.Note: The 35 amp alternator has three positive diodes and three stator leads. The remaining alternators have four positive diodes and four stator leads.Exciter Diode Check
Illustration 3 g00825576
Exciter Diode Check (2) Wire assembly (9) Stator leads (11) Stator lead connection (13) Exciter diode output
Stator leads (9) remain disconnected from the rectifier.
The multimeter remains on the diode scale.
Disconnect wire assembly (2) from the rectifier.
Connect the multimeter leads across one stator lead connection (11) and exciter diode output (13) .
Record the multimeter reading.
Reverse the multimeter leads.
Record the multimeter reading.Expected Result: One reading is "0L" and the other reading is .4 to .9 volts.Results:OK - One reading is "0L" and the other reading is .4 to .9 volts. The diode is normal. Repeat steps 3 through 7 for the other stator lead connections (11). STOP.NOT OK - Both readings are "00". The diode is shorted. Replace the rectifier. STOP.NOT OK - Both readings are "0L". The diode is open. Replace the rectifier. STOP.Note: The 35 amp alternator has three exciter diodes and three stator leads. The remaining alternators have three exciter diodes and four stator leads. If the alternator has four stator leads, do not test the stator lead with the black mark. The stator with the black mark lacks an exciter diode. Ignore the result for that stator lead. See Systems

Caterpillar parts catalog:

Caterpillar parts catalog
Product:

785G Off-Highway Truck RTL00001-UP (MACHINE) POWERED BY 3512E Engine

370-9022: MOUNTING GP-RIM » M00652300591
370-9024: MOUNTING GP-RIM » M00652300592

784B Tractor 5RK00001-UP (MACHINE) POWERED BY 3512 Engine

2A-6631: WHEEL GP-REAR » SEBP21880460
8X-9489: WHEEL GP-REAR » SEBP21880461
8X-9487: WHEEL GP-FRONT » SEBP21880578

785B Off-Highway Truck 6HK00001-UP (MACHINE) POWERED BY 3512 Engine

140-7626: WHEEL GP-REAR » SEBP21890886
6G-9345: WHEEL GP-REAR » SEBP21890887
6G-9270: WHEEL GP-FRONT » SEBP21891055
6G-9270: WHEEL GP-FRONT » SEBP21891056

789B Off-HighwayTruck 7EK00001-UP (MACHINE) POWERED BY 3516 Engine

115-1778: WHEEL AR-FINAL DRIVE & BRAKE » SEBP21920886
143-2173: WHEEL GP-REAR » SEBP21920888
5T-4476: WHEEL GP-REAR » SEBP21920889
5T-4476: WHEEL GP-REAR » SEBP21920890
5T-4476: WHEEL GP-REAR » SEBP21920891
5T-1023: WHEEL GP-FRONT » SEBP21921050

785C Off-HighwayTruck 1HW00001-UP (MACHINE) POWERED BY 3512B Engine

144-3854: WHEEL AR » SEBP27870591
180-5962: WHEEL AR » SEBP27870592
190-3133: WHEEL AR » SEBP27870593
140-7626: WHEEL GP-REAR » SEBP27870596
140-7626: WHEEL GP-REAR » SEBP27870597
6G-9270: WHEEL GP-FRONT » SEBP27870752

785C HAA Off-Highway Truck 5AZ00001-UP (MACHINE) POWERED BY 3516B Engine

140-7626: WHEEL GP-REAR » SEBP27880739
140-7626: WHEEL GP-REAR » SEBP27880740
140-7626: WHEEL GP-REAR » SEBP27880741
6G-9270: WHEEL GP-FRONT » SEBP27880967

784C Tractor 2PZ00001-UP (MACHINE) POWERED BY 3512 Engine

8X-9487: WHEEL GP-FRONT » SEBP27890841

789C Off-Highway Truck 2BW00001-UP (MACHINE) POWERED BY 3516 Engine

143-2173: WHEEL GP-REAR » SEBP27900928
143-2173: WHEEL GP-REAR » SEBP27900929
5T-1023: WHEEL GP-FRONT » SEBP27901198

785C Off-Highway Truck APX00001-UP (MACHINE) POWERED BY 3512B Engine

370-9022: MOUNTING GP-RIM » SEBP30211074
370-9024: MOUNTING GP-RIM » SEBP30211075
190-3133: WHEEL AR » SEBP30211133
140-7626: WHEEL GP-REAR » SEBP30211141
140-7626: WHEEL GP-REAR » SEBP30211142
6G-9270: WHEEL GP-FRONT » SEBP30211513

785D Off-Highway Truck MSY00001-UP (MACHINE) POWERED BY 3512C Engine

370-9022: MOUNTING GP-RIM » SEBP49980775
370-9024: MOUNTING GP-RIM » SEBP49980776

785D OEM Off-Highway Truck DMC00001-UP (MACHINE) POWERED BY 3512 Engine

370-9022: MOUNTING GP-RIM » SEBP50530717
370-9024: MOUNTING GP-RIM » SEBP50530718

789D Off-Highway Truck SPD00001-UP (MACHINE) POWERED BY 3516 Engine

288-5668: MOUNTING GP-RIM » SEBP50540903
288-5668: MOUNTING GP-RIM » SEBP50540904
328-8484: MOUNTING GP-RIM » SEBP50540905
388-0393: MOUNTING GP-RIM » SEBP50540907
388-0394: MOUNTING GP-RIM » SEBP50540908

789D XQ Off-Highway Truck SHH00001-UP (MACHINE) POWERED BY 3516 Engine

288-5668: MOUNTING GP-RIM » SEBP61240653
288-5668: MOUNTING GP-RIM » SEBP61240654
328-8484: MOUNTING GP-RIM » SEBP61240655
388-0393: MOUNTING GP-RIM » SEBP61240657
388-0394: MOUNTING GP-RIM » SEBP61240658

Parts nut Caterpillar catalog:

3K9770 NUT-FULL
10S, 225D, 229, 229D, 2384C, 2484C, 325 LN, 325B L, 330, 330 FM L, 345B II, 345D L, 345D L VG, 3512, 3516, 3608, 365B, 365B II, 365C, 365C L, 374D L, 374F L, 375, 385B, 385C, 385C FS, 385C L, 390D, 39...

8T0122 NUT-FULL
120K, 120K 2, 12K, 12M 3, 12M 3 AWD, 140K, 140K 2, 140M 3, 140M 3 AWD, 160K, 160M 3, 160M 3 AWD, 16M, 2384C, 2470C, 2484C, 24H, 24M, 2864C, 306E, 311F LRR, 312D2, 312D2 GC, 312D2 L, 312E, 312E L, 313D...

3B6734 NUT
12E, 12F, 12G, 14E, 16, 3304, 3306, 561B, 561C, 594H, 621, 784C, 785B, 785C, 789B, 789C, 793B, 793C, 824B, 826B, 834, 941, 955H, 955L, 966C, 977D, 977H, 980, 988, 992, D353C, D4D, D5, D6C, D7F, D8H, D...

2R0504 NUT
1673C, 320D, 324D L, 325B L, 325C, 325D L, 329D L, 3306, 3306B, 3306C, 350 L, 3606, 3608, 375, 508, 5080, 515, 525, 561D, 613, 613B, 615, 69D, 784B, 785B, 789B, 814F, 815F, 816F, 824C, 826C, 916, 920,...

8H3390 NUT-FULL
3606, 561H, 561M, 561N, 572R, 572R II, 58, 583K, 589, 594, 594H, 613C, 613C II, 613G, 631D, 631E, 637D, 637E, 639D, 784B, 784C, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D, 8A, 8B, 8D, 8S, 977, 9A, 9...

5B2183 NUT-JAM
120G, 12G, 130G, 14G, 16G, 322B L, 322C, 322C FM, 325B, 325B L, 325C FM, 330B L, 330C FM, 3406, 345B, 345B II, 345B L, 365B, 365B II, 365B L, 385B, 385C, 385C L, 5090B, 5130, 5130B, 517, 5230, 5230B, ...

1982914 NUT
120M, 120M 2, 12M, 12M 2, 12M 3, 12M 3 AWD, 140M, 140M 2, 140M 3, 140M 3 AWD, 14H, 14M, 160M, 160M 2, 160M 3, 160M 3 AWD, 16H, 16M, 24M, 2864C, 336E, 336E H, 336E HVG, 336E L, 336E LH, 336E LN, 336F L...

2351089 NUT-FLANGE
24M, 3516B, 584, 735, 735B, 740, 740B, 770, 770G, 770G OEM, 772, 772G, 772G OEM, 773F, 773G, 773G LRC, 773G OEM, 775F, 775G, 775G LRC, 775G OEM, 777F, 777G, 789D, 793D, 834H, 834K, 844K, 854K, 988H, 9...

5P5461 NUT
140M 2, 160M 2, 215, 215B, 225, 225D, 229D, 231D, 235, 235B, 235C, 235D, 245, 245B, 2470C, 2570C, 2670C, 2864C, 5130, 5130B, 517, 5230, 5230B, 525C, 525D, 527, 535C, 535D, 545C, 545D, 553C, 555D, 563C...

7H3607 NUT
517, 527, 561C, 561M, 561N, 631D, 631E, 631G, 633, 633D, 633E, 633E II, 637D, 637E, 637G, 639D, 785, 785B, 785C, 785D, 789B, 789C, 793, 793B, 815, 931B, 931C, 933, 935B, 939, 941, 943, 951B, 953, 953B...

7H7539 NUT-FULL
571G, 572G, 572R, 578, 58, 583R, 587R, 587T, 615, 615C, 623B, 623E, 623F, 623G, 633E, 784B, 784C, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D, 854G, 854K, 931B, 963, 973, 977, 992C, 992D, AD30, D11N,...

8K6474 NUT AS-SEALING
518, 518C, 528, 528B, 530B, 611, 613B, 613C, 613C II, 615, 615C, 621B, 621E, 621F, 623E, 623F, 627E, 627F, 631C, 631E, 633E II, 637E, 639D, 651E, 657E, 769D, 771D, 773D, 773E, 775D, 775E, 776D, 777D, ...

3281065 NUT-JAM
776C, 777D, 785D

0531704 NUT
69D, 769C, 769D, 771C, 771D, PR-450C

0006321 NUT
120B, 120G, 140B, 768C, 769C, 769D, 771C, 771D, 772B, 773B, 773D, 775B, 775D, 776C, 776D, 777, 777B, 777D, 784B, 785, 785B, 789, 789B, 793B, 793C, AD40, AD45, AE40, AP-1000B, AP-1055B, AP-1055D, AP-60...

9D7989 NUT
69D, 768C, 769C, 769D, 771C, 771D, 772B, 773B, 773D, 773E, 775B, 775D, 775E, 776, 776C, 776D, 777, 777B, 777D, 784B, 784C, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D, 793, 793B, 793C, 793D, 793F, 79...

2U2504 NUT-FULL
D250B, D250D, D250E, D25C, D25D, D300B, D300D, D300E, D30C, D350C, D350E, D35C, D35HP, D400, D400E, D400E II, D40D, D44B, D550B

7D9593 NUT
966F

2U2435 NUT-NYLOCK
D250B, D250D, D250E, D250E II, D25C, D25D, D300B, D300D, D300E, D300E II, D30C, D350C, D350E, D35C, D35HP, D400, D400E, D40D

2G5653 NUT
69D, 768C, 769C, 769D, 771C, 771D, AD40, AD45, AD45B, AE40, D40D, R1700 II, R2900, R2900G, R3000H

2993401 NUT-HEX SLOTTED
12M 2, 140M, 160M, 770, 770G, 770G OEM, 772, 772G, 772G OEM, 773B, 773D, 773E, 773F, 773G, 773G LRC, 773G OEM, 775B, 775D, 775E, 775F, 775G, 775G LRC, 775G OEM, 777F, 777G, SH-56B, SNOW WING

5D0916 NUT-STAKE
69D, 768B, 769, 769C, 769D, 771C, 771D, 772, 773, 773B, 773D, 773E, 775B, 775D, 775E

1321995 NUT-SPECIAL
769D, 771D, 773D, 775D, 776D, 777D, 785B, 789B, 793B, 793C

2G0272 NUT-ACORN
773B, 777, 785, 785B, 789B, 793B