6T3631 NUT-HEX Caterpillar parts
130G, 215, 215B, 215D, 225, 225D, 227, 229, 235, 235B, 235C, 235D, 236D, 242D, 245, 245B, 245D, 257D, 259D, 272D, 272D XHP, 299D, 299D XHP, 30/30, 303.5E, 304E, 305.5E, 305E, 307, 307B, 311B, 311D LRR...
Rating:
Alternative (cross code) number:
CA6T3631
6T-3631
6T3631
CA6T3631
6T-3631
6T3631
Weight: 0.01 pounds 0 kg.
ARTICULATED TRUCK, WHEELED EXCAVATOR,
Compatible equipment models: 6T3631:
BACKHOE LOADER
416
416B
416E
420D
426
426B
426C
428
428B
432E
434E
436
436B
436C
438B
438C
438D
442D
442E
444E
446
446B
450E
COMPACT WHEEL LOADER
910
EXCAVATOR
215
215B
215D
225
225D
229
235
235B
235C
235D
245
245B
245D
307
311B
311D LRR
312
312B L
312C
312D
312D L
312D2
312E
312E L
313D2
314D LCR
314E CR
314E LCR
315
315B L
315C
315D L
316E L
317
317B LN
318B
318C
318D2 L
318E L
319C
319D
319D L
319D LN
325
325B
GEN SET ENGINE
3208
3304
3304B
3306
3306B
3406B
3406C
3408
3412
3412C
3456
3508
3508B
3512
3512B
3516
3516B
G3508
G3516
GENERATOR SET
3304B
3306B
3406C
3406E
3408C
3412
3412C
3456
3508
3508B
3512
3512B
3512C
3516
3516B
3516C
C13 XQ350
C15
C15 I6
C175-16
C175-20
C18
C18 I6
C27
C32
C4.4
C7.1
C9
G3306
G3406
G3412
G3508
G3512
G3512E
G3516
G3516B
G3516C
G3516E
G3516H
G3520B
G3520C
G3520E
INDUSTRIAL ENGINE
3126B
3176C
3196
3304
3306
3306B
3406
3406B
3406C
3408
3408C
3408E
3412
3412C
3412E
3508
3508B
3512
3512B
3512C
3516
3516B
C-10
C-12
C-15
C-16
C-9
C11
C13
C15
C18
C27
C32
C7
C9
C9.3
LANDFILL COMPACTOR
826C
LOGGER
227
MARINE ENGINE
3304
3304B
3306
3306B
3406B
3406C
3408
3408C
3412
3412C
3508
3508B
3508C
3512
3512B
3512C
3516
3516B
3516C
3606
3608
3612
3616
C175-16
C18
C280-12
C280-16
C280-6
C280-8
MOTOR GRADER
130G
MULTI TERRAIN LOADER
257D
PETROLEUM PACKAGE
CX31-C13I
CX31-C15I
CX31-C18I
CX31-C9I
CX35-C18I
CX35-P800
TH35-C11I
TH35-C13I
TH35-C15I
SOIL COMPACTOR
815B
TRACK-TYPE TRACTOR
30/30
D4H
D4H XL
D5H
D5H XL
D5N
D6E
D6F SR
D6G
D6G SR
D6H
D6H XL
D6H XR
D6K
D6K LGP
D6K XL
D6M
D6N
D6R
D6R II
D6R III
D6T
D6T LGP
D6T LGPPAT
D6T XL
D7H
D8N
DEUCE
VIBRATORY COMPACTOR
CS-643
WHEEL LOADER
916
920
924F
924H
924HZ
926
926A
928H
928HZ
936
936F
938G
938G II
938H
950 GC
950B
950G
950G II
950H
950K
962G
962G II
962H
962K
966D
966G
966G II
966H
966M
966M XE
972G
972G II
972H
972K
972M
972M XE
980C
980F II
980G
980G II
980H
980K
980K HLG
980M
982M
988B
988G
988H
988K
990 II
990H
990K
992C
992G
992K
993K
994
994D
994F
994H
G936
WHEEL TRACTOR
611
613C
613C II
615
621B
621E
621F
621G
623E
623G
627E
627F
627G
631D
631E
631G
633E II
637D
637E
637G
651E
657E
657G
WHEEL TRACTOR-SCRAPER
613G
Information:
Probable Causes
Engine Oil Cooler
Power Train Oil Cooler (if equipped)
Water-Cooled Turbocharger
Cylinder Head Gasket
BlockThe procedures have been listed in order of probability. Complete the procedures in order.Verify the presence of oil in the coolant with a scheduled oil sample. Verification must be made before performing the procedure.Recommended Actions
Table 1
Troubleshooting Test Steps    Values    Results    
1. Leak in the Engine Oil Cooler
A. Check for leaks in the engine oil cooler. Refer to Testing and Adjusting for the proper procedure.
   
Oil Cooler
   
Result: A leak is found in the engine oil cooler.
Repair: Install a new oil cooler core. Refer to the Disassembly and Assembly manual.
Flush the cooling system. Refer to the Operation and Maintenance Manual for the proper flushing procedure. Refill the cooling system with the proper coolant. Refer to the Operation and Maintenance Manual for the correct coolant and capacities.
Check the oil for coolant. If coolant is found in the oil, drain the crankcase. Refill the crankcase with the proper oil after the leak has been repaired. Refer to the Operation and Maintenance Manual for the correct oil capacities and viscosity.
Result: A leak was not found in the engine oil cooler.
Proceed to Test Step 2.
   
2. Leak in the Power Train Oil Cooler
A. Check for leaks in the power train oil cooler. Refer to Testing and Adjusting for the proper procedure
   
Power Train Cooler
   
Result: A leak is found in the power train oil cooler.
Repair: Install a new oil cooler core. Refer to the Disassembly and Assembly manual.
Flush the cooling system. Refer to the Operation and Maintenance Manual for the proper flushing procedure. Refill the cooling system with the proper coolant. Refer to the Operation and Maintenance Manual for the correct coolant and capacities.
Check the oil for coolant. If coolant is found in the oil, drain the crankcase. Refill the oil after the leak has been repaired. Refer to the Operation and Maintenance Manual for the correct oil capacities and viscosity.
Result: A leak was not found in the power train oil cooler.
Proceed to Test Step 3.
   
3. Water-Cooled Turbocharger (if equipped)
A. Inspect the turbocharger for cracks.
B. Remove the oil drain line from the turbo and pressurize the cooling system, Refer to Testing and Adjusting, "Cooling System - Test".
C. Check the turbocharger for coolant leakage.
   
Turbocharger
   
Result: The turbocharger is cracked.
Repair: Replace the turbocharger. Refer to the engine Disassembly and Assembly for the correct procedure.
Flush the cooling system, Refer to the Operation and Maintenance Manual for the correct procedure.
Refill the cooling system with the proper coolant. Refer to the Operation and Maintenance Manual for the correct coolant and capacities.
Check the oil for coolant. If coolant is found in the oil, drain the oil. Refill the oil after the leak has been repaired. Refer to the Operation and Maintenance Manual for the correct oil capacities.
Result: The turbocharger is not cracked.
Proceed to Test Step 4.
   
4. Cylinder Head Gasket
A. Remove the cylinder head. Refer to the Disassembly and Assembly manual.
B. Check the cylinder liner projection. Refer to the Systems Operation/Testing and Adjusting
Engine Oil Cooler
Power Train Oil Cooler (if equipped)
Water-Cooled Turbocharger
Cylinder Head Gasket
BlockThe procedures have been listed in order of probability. Complete the procedures in order.Verify the presence of oil in the coolant with a scheduled oil sample. Verification must be made before performing the procedure.Recommended Actions
Table 1
Troubleshooting Test Steps    Values    Results    
1. Leak in the Engine Oil Cooler
A. Check for leaks in the engine oil cooler. Refer to Testing and Adjusting for the proper procedure.
   
Oil Cooler
   
Result: A leak is found in the engine oil cooler.
Repair: Install a new oil cooler core. Refer to the Disassembly and Assembly manual.
Flush the cooling system. Refer to the Operation and Maintenance Manual for the proper flushing procedure. Refill the cooling system with the proper coolant. Refer to the Operation and Maintenance Manual for the correct coolant and capacities.
Check the oil for coolant. If coolant is found in the oil, drain the crankcase. Refill the crankcase with the proper oil after the leak has been repaired. Refer to the Operation and Maintenance Manual for the correct oil capacities and viscosity.
Result: A leak was not found in the engine oil cooler.
Proceed to Test Step 2.
   
2. Leak in the Power Train Oil Cooler
A. Check for leaks in the power train oil cooler. Refer to Testing and Adjusting for the proper procedure
   
Power Train Cooler
   
Result: A leak is found in the power train oil cooler.
Repair: Install a new oil cooler core. Refer to the Disassembly and Assembly manual.
Flush the cooling system. Refer to the Operation and Maintenance Manual for the proper flushing procedure. Refill the cooling system with the proper coolant. Refer to the Operation and Maintenance Manual for the correct coolant and capacities.
Check the oil for coolant. If coolant is found in the oil, drain the crankcase. Refill the oil after the leak has been repaired. Refer to the Operation and Maintenance Manual for the correct oil capacities and viscosity.
Result: A leak was not found in the power train oil cooler.
Proceed to Test Step 3.
   
3. Water-Cooled Turbocharger (if equipped)
A. Inspect the turbocharger for cracks.
B. Remove the oil drain line from the turbo and pressurize the cooling system, Refer to Testing and Adjusting, "Cooling System - Test".
C. Check the turbocharger for coolant leakage.
   
Turbocharger
   
Result: The turbocharger is cracked.
Repair: Replace the turbocharger. Refer to the engine Disassembly and Assembly for the correct procedure.
Flush the cooling system, Refer to the Operation and Maintenance Manual for the correct procedure.
Refill the cooling system with the proper coolant. Refer to the Operation and Maintenance Manual for the correct coolant and capacities.
Check the oil for coolant. If coolant is found in the oil, drain the oil. Refill the oil after the leak has been repaired. Refer to the Operation and Maintenance Manual for the correct oil capacities.
Result: The turbocharger is not cracked.
Proceed to Test Step 4.
   
4. Cylinder Head Gasket
A. Remove the cylinder head. Refer to the Disassembly and Assembly manual.
B. Check the cylinder liner projection. Refer to the Systems Operation/Testing and Adjusting
Cat SIS web machinery list:
Parts nut Caterpillar catalog:
5D0765
NUT
16, 16G, 16H, 16H NA, 650B, 651, 666, 69D, 768B, 768C, 769, 769C, 769D, 770, 771C, 771D, 772, 772B, 773, 773B, 773D, 773E, 773F, 775B, 775D, 775E, 775F, 776, 776C, 776D, 777, 777B, 777D, 777F
16, 16G, 16H, 16H NA, 650B, 651, 666, 69D, 768B, 768C, 769, 769C, 769D, 770, 771C, 771D, 772, 772B, 773, 773B, 773D, 773E, 773F, 775B, 775D, 775E, 775F, 776, 776C, 776D, 777, 777B, 777D, 777F
9V6561
NUT-LOCK
518, 926, 936, D250B, D250E, D300B, D300D, G936, IT28
518, 926, 936, D250B, D250E, D300B, D300D, G936, IT28
2688262
NUT
12M 2, 140M, 14M, 160M, 16M, 24M, 950H, 950K, 962H, 962K, 966G, 966G II, 966H, 966K, 966M, 966M XE, 972G, 972G II, 972H, 972K, 972M, 972M XE, 980G, 980G II, 980H, 980K, 980K HLG, SNOW WING
12M 2, 140M, 14M, 160M, 16M, 24M, 950H, 950K, 962H, 962K, 966G, 966G II, 966H, 966K, 966M, 966M XE, 972G, 972G II, 972H, 972K, 972M, 972M XE, 980G, 980G II, 980H, 980K, 980K HLG, SNOW WING
8V9720
NUT-ADJUSTING
814B, 815B, 816B, 966D, 966F, 966G, D25D, D350E, D400E, D40D
814B, 815B, 816B, 966D, 966F, 966G, D25D, D350E, D400E, D40D
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...
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...
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
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
4I9631
NUT
735, 740, 793C, 793D
735, 740, 793C, 793D
2F8057
NUT-SLOTTED
120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 12G, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 140M, 140M 2, 140M 3, 143H,...
120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 12G, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 140M, 140M 2, 140M 3, 143H,...
6S3065
NUT
120G, 12G, 130G, 140G, 14G, 160G, 16G, 24H, CB-334D, CB-335D
120G, 12G, 130G, 140G, 14G, 160G, 16G, 24H, CB-334D, CB-335D
8C7328
NUT
320 L, 320B, 320B FM LL, 320C, 320C FM, 320D, 320D FM, 320D FM RR, 322B L, 322C FM, 323D LN, 323D SA, 324D FM, 324D FM LL, 325, 325 L, 325 LN, 325B, 325B L, 325C, 325D, 325D L, 329D, 329D L, 329D LN, ...
320 L, 320B, 320B FM LL, 320C, 320C FM, 320D, 320D FM, 320D FM RR, 322B L, 322C FM, 323D LN, 323D SA, 324D FM, 324D FM LL, 325, 325 L, 325 LN, 325B, 325B L, 325C, 325D, 325D L, 329D, 329D L, 329D LN, ...
6G4701
NUT-BEARING
120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 12G, 12H, 12H ES, 12H NA, 12K, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 160G, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA
120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 12G, 12H, 12H ES, 12H NA, 12K, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 160G, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA
8D3540
NUT
12G, 12H, 12H ES, 12H NA, 12K, 130G, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 160G, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA
12G, 12H, 12H ES, 12H NA, 12K, 130G, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 160G, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA
6V8378
NUT
1090, 1190, 1190T, 120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 1290T, 12G, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 12M 3 AWD, 130G, 135H, 135H NA, 1390, 140G, 140H, 140H ES, 140H NA...
1090, 1190, 1190T, 120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 1290T, 12G, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 12M 3 AWD, 130G, 135H, 135H NA, 1390, 140G, 140H, 140H ES, 140H NA...
3T0853
NUT
12G, 140G, 1673C, 215, 235, 3208, 3304, 3306, 3306B, 615C, 627E, 637E, 815B, 920, 943, 966F, CS-551, D4HTSK II, D5H, D6D, D6H, G3304, G936, IT28B
12G, 140G, 1673C, 215, 235, 3208, 3304, 3306, 3306B, 615C, 627E, 637E, 815B, 920, 943, 966F, CS-551, D4HTSK II, D5H, D6D, D6H, G3304, G936, IT28B
7W0516
NUT-ROTOR CLAMP
3304, 3306, 3406, 3406B, 3406C, CG137-08, CG137-12, G3304, G3304B, G3306, G3306B, G3406, G3408, G3408C, G3412
3304, 3306, 3406, 3406B, 3406C, CG137-08, CG137-12, G3304, G3304B, G3306, G3306B, G3406, G3408, G3408C, G3412
3H3680
NUT-JAM
1140, 1150, 1160, 120G, 12E, 12F, 12G, 130G, 140G, 14E, 14G, 16, 1673C, 1676, 16G, 214B, 215, 215B, 224B, 225, 235, 245, 3116, 3126, 3176, 3176B, 320 L, 3204, 3208, 325, 330 L, 3304, 3304B, 3306, 3306...
1140, 1150, 1160, 120G, 12E, 12F, 12G, 130G, 140G, 14E, 14G, 16, 1673C, 1676, 16G, 214B, 215, 215B, 224B, 225, 235, 245, 3116, 3126, 3176, 3176B, 320 L, 3204, 3208, 325, 330 L, 3304, 3304B, 3306, 3306...
3H3681
NUT-FULL
119, 120G, 128, 12E, 12G, 130G, 140G, 14G, 160G, 1673C, 1676, 16G, 215, 215B, 215C, 215D, 225, 225D, 227, 229, 229D, 231D, 235, 235C, 235D, 245, 245B, 245D, 3208, 330 L, 3304, 3306, 3406, 3406B, 3408,...
119, 120G, 128, 12E, 12G, 130G, 140G, 14G, 160G, 1673C, 1676, 16G, 215, 215B, 215C, 215D, 225, 225D, 227, 229, 229D, 231D, 235, 235C, 235D, 245, 245B, 245D, 3208, 330 L, 3304, 3306, 3406, 3406B, 3408,...
3445673
NUT
120M 2, 12M 2, 12M 3, 12M 3 AWD, 140M 2, 140M 3, 140M 3 AWD, 160M 2, 160M 3, 160M 3 AWD, 16M, 2570C, 2670C, 2864C, 3054C, 3126, 3126B, 3304, 3306, 3306B, 336F L, 3406, 3406B, 3406C, 3408, 3412, 3412E,...
120M 2, 12M 2, 12M 3, 12M 3 AWD, 140M 2, 140M 3, 140M 3 AWD, 160M 2, 160M 3, 160M 3 AWD, 16M, 2570C, 2670C, 2864C, 3054C, 3126, 3126B, 3304, 3306, 3306B, 336F L, 3406, 3406B, 3406C, 3408, 3412, 3412E,...
3N4895
NUT AS-SPRING
3304, 3306, 834B, 836, 950, 988B, 992C, 994, 994D, PF-290B, PS-150B, PS-200B, PS-360B
3304, 3306, 834B, 836, 950, 988B, 992C, 994, 994D, PF-290B, PS-150B, PS-200B, PS-360B
2K9613
NUT AS-SPRING
235, 235B, 235C, 235D, 245, 245B, 3304, 3306, 814, 815, 816, 920, 930, 950, 966C, 980, 980B, R2900
235, 235B, 235C, 235D, 245, 245B, 3304, 3306, 814, 815, 816, 920, 930, 950, 966C, 980, 980B, R2900
8T9370
NUT AS-SPRING
3304, 3306, 988B, 992C, 994D, CB-334D, CB-334E, CB-335D, CP-433C, CS-431C, CS-563C, CS-583C, PF-290B, PS-150B, PS-200B, PS-360B
3304, 3306, 988B, 992C, 994D, CB-334D, CB-334E, CB-335D, CP-433C, CS-431C, CS-563C, CS-583C, PF-290B, PS-150B, PS-200B, PS-360B
8C6808
NUT
130G, 1673C, 3114, 3116, 3126, 3176B, 3176C, 3196, 3208, 3304, 3304B, 3306, 3306B, 3406, 3406B, 3406C, 3406E, 3408, 3408C, 3408E, 3412, 3412C, 3412D, 3412E, 3456, 518C, 528B, 530B, 572G, 631D, 637D, 9...
130G, 1673C, 3114, 3116, 3126, 3176B, 3176C, 3196, 3208, 3304, 3304B, 3306, 3306B, 3406, 3406B, 3406C, 3406E, 3408, 3408C, 3408E, 3412, 3412C, 3412D, 3412E, 3456, 518C, 528B, 530B, 572G, 631D, 637D, 9...
1B4330
NUT
10, 118, 119, 120, 120B, 120G, 127, 129, 12E, 12F, 12G, 130G, 140, 140B, 140G, 14E, 14G, 16, 160G, 163, 1673, 1673B, 1673C, 1674, 1676, 1693, 16G, 184, 191, 205, 205B, 206, 206B, 211B, 212, 212B, 213B...
10, 118, 119, 120, 120B, 120G, 127, 129, 12E, 12F, 12G, 130G, 140, 140B, 140G, 14E, 14G, 16, 160G, 163, 1673, 1673B, 1673C, 1674, 1676, 1693, 16G, 184, 191, 205, 205B, 206, 206B, 211B, 212, 212B, 213B...
7F7622
NUT-HEX
12E, 231D, 235, 235C, 245, 3126, 3208, 3304, 3306, 3406, 3406B, 3406C, 3408, 3412, 3508, 3512, 3512B, 3516, 627, 651, 657, 666, 777, 824C, 825C, 826C, 955C, 955H, 966C, 980, 980C, C18, D326F, D337, D3...
12E, 231D, 235, 235C, 245, 3126, 3208, 3304, 3306, 3406, 3406B, 3406C, 3408, 3412, 3508, 3512, 3512B, 3516, 627, 651, 657, 666, 777, 824C, 825C, 826C, 955C, 955H, 966C, 980, 980C, C18, D326F, D337, D3...