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Replacement Parts for Caterpillar® Engines

CAT DIESEL ENGINE PARTS LIST
CAT D346, CAT D348, CAT D349, CAT D353

Caterpillar D346/19.9L8 Cylinder 
DieselBore 5.400 
1191 CIDStroke 6.500 

 

CYLINDER KIT

8PLG8N0931Cylinder kit5.4QQ bore, 2.00 pin, PC, 4 valve relief [8N0931 piston, 8NQ822 rings, 7N9808 pin, 3F8513 retainers, 1260739 liner]
8PLG9N2874Cylinder kit5.400 b〇rer 2.00 pin, PC [9N2874 piston, 8N0822 rings, 7N9806 pin, 3F8513 retainers, 1260739 liner]
Replaces LK0735 cylinder kit in sets
8LK0735-FCylinder kit5.4QQQ bore, PC, 2.000 pin# straight rod, dual nir 1/4 oil ring [7N0735 piston, 1PQ734 rings, 7N9806 pin, 7E5665 retainers, 1260739 liner, 5P8789 seal kit]
88N0931Piston body5.4000 bore, 2.00 pin, PCf 4 valve relief, 1/8 oil ring
89N2874Piston body5.400 bore, 2.00 pin, PC, straight rod, 4 valve relief with plug, 1/8 oil ring
Replaces 7N0735 piston in sets
87N0735-FPiston body5.4QQQ bore, 2.QQ pin, PC, straight rod, early type piston L/F, dual-ni, 1 /4 oil ring groove
88N0822Ring set1/8 keystone top ring [8ND502 top, 2P2817 mid, 7N7Q78 oil] 1 cyl set
Used with 8NQ931 and 9N2874 piston body
81P0734-FRing set5.4QQQ bore, 114 oil ring [1 cyl set]
Used with 7ND735 piston body
87N 明 08Piston pin2.ODD diar 4.292 length
87N9806Piston pin2.Q00 dia, 4.525 length (straight and narrow taper rod)
163F8513Retiner piston pin 
167E5665Retainer piston pinUse with 2.QQQ pin diameter [repl 8N7295]
81260739Cylinder liner5.4QQQ bore [uses (3) 3S3978, (1) 9L5854 seals] [repl 6M8700]
85P8789Cylinder liner oring kitContains: (3) 3S3978, (D9L5854
243S3978Cylinder liner oring 
89L5854Cylinder liner oringUpper band seal, 1 per liner

 

BEARINGS

4 7N2458Bearing main pairStd
Early engines used with thrust bearing
4 7N2459Bearing main pair■025
4 7N2461Bearing main pair■050
 
1 7N2463Bearing thrust pairStd
Earlv engines with thrust bearing
1 7N2464Bearing thrust pair.025
1 7N2465Bearing thrust pair■050
 
5 8N6652Bearing main pairStd, 5.2500 journal, 5.635Q housing bore, 1.744 length
Late engines used with thrust washers
5 8N5957Bearing main pair.025
5 8N5958-FBearing main pair■050
 
2 9S1162Thust washer0.186 thick
Late engines with thrust washers
 
8 7N2581Bearing rod pairStd, 4.3745/4.3755 journal, 4.7210 housing bore, 1.373 length, notched oil groove
Early
8 7N2582-FBearing rod pair■025
8 7N2583-BBearing rod pair■050
 
8 1W8539Bearing rod pairStd, 4.3742/4.3752 journal, 4.7210 housing bore, 1.373 length, short oil groove
Late
8 4W5693Bearing rod pair.025 [repl 8N5948]
8 4W5694Bearing rod pair■050
 

 

Caterpillar D346/19.9L8 Cylinder 
Diesel (Continued)Bore 5.400 
1191 CIDStroke 6.500 
81M6107Bushing con rod2.001 ID, 2.183 0D, 1.875 OAL 
Early 
88N2018Bushing con rodWide taper rod, 1.9845 ID, 2.1825 0D, 1.875 OAL (can use 4P8495) 
Late 
GASKET & SEALS  
 CATGASKETNOTEFar gasket sets: Call with Serial and Arrangement Numbers 
CAMSHAFT  
 CAMSHAFTCAMSHAFTRemanufactured available, call with casting number 
VALVE TRAIN  
 CYLHEADNOTEFor complete and bare cylinder heads – Refer to Cylinder Head Catalog or Call with casting 
161N4885Valve intake1.771 head dia, 5.997 OAL [repl 1P0407] 
167E7830Valve exhaust1.646 head dia, 5.997 length [repl 1P1Q81] 
642A4429Valve lock0.372 stem dia, 2G, 7 degree 
326N2236Valve guide[repl 2M3293] 
323S3018Valve spring  
322S2813-BRotator  
329M3205Insert intake  
321W5283Valve insertExhaust, I PD standard size 1.692″ 
FUEL I INJECTOR  
88N1831-FNozzleCapsule nozzle (repl 7S1059) 
88N3176-FNozzleCapsule nozzle {repl 7M4190) 
TU^OIAIR  
 TURBOTURBOCHARGERNew or remanufactured available, call far pricing
Caterpillar D348/29.3L12 Cylinder 
DieselBore 5.400 
1786 CIDStroke 6.500 

 

CYLINDER KIT

12PLG8N0931Cylinder kit5.4QQ bore, 2.00 pin, PC, 4 valve relief [8N0931 piston, 8NQ822 rings, 7N9808 pin, 3F8513 retainers, 1260739 liner]
12PLG9N2874Cylinder kit5.400 bore, 2.00 pin, PC [9N2874 piston, 8N0822 rings, 7N9806 pin, 3F8513 retainers, 1260739 liner]
Replaces LK0735 cylinder kit in sets
12LK0735-FCylinder kitB.4QQQ bore, PC, 2.000 pin, straight rod, dual nir 1/4 oil ring [7N0735 piston, 1PQ734 rings, 7N9806 pin, 7E5665 retainers, 1260739 liner, 5P8789 seal kit]
128N0931Piston body5.4000 bore, 2.Q0 pin, PCf 4 valve relief, 1/8 oil ring
129N2874Piston body5.400 bore, 2.00 pin, PC, straight rod, 4 valve relief with plug, 1/8 oil ring
Replaces 7N0735 piston in sets
127N0735-FPiston body5.4QQQ bore, 2.QQ pin, PC, straight rod, early type piston L/F, dual-ni, 1 /4 oil ring groove
128N0822Ring set1/8 keystone top ring [8ND502 top, 2P2817 mid, 7N7Q78 oil] 1 cyl set
Used with 8NQ931 and 9N2874 piston body
121P0734-FRing set5.4QQQ bore, 1/4 oil ring [1 cyl set]
Used with 7N0735 piston body
127N 明 08Piston pin2.ODD diar 4.292 length
127N9806Piston pin2.QQQ dia, 4.525 length (straight and narrow taper rod)
243F8513Retiner piston pin 
247E5665Retainer piston pinUse with 2.QQQ pin diameter [repl 8N7295]
121260739Cylinder liner5.4QQQ bore [uses (3) 3S3978, (1) 9L5854 seals] [repl 6N8700]
125P8789Cylinder liner oring kitContains:⑶ 3S3978,⑴ 9L5854
363S3978Cylinder liner oring 
129L5854Cylinder liner oringUpper band seal, 1 per liner

 

BEARINGS

 D348BRG1NOTE:Early eng use:(7) 2S2838, (2) 9S1162, (4) 2H1190 [repl 2S283g：(1) 2S2838, (2) 9S1162, (4) 2H1190
72S2838Bearing main pairStd
75S6303Bearing main pair.025
75S6306Bearing main pair■050
 
42H1190DowelMain thrust
 
 D348BRG2NOTE:Mid eng use: (7) 8N6652, (2) 9S1162; 1.744 length
78N6652Bearing main pairStd, 5.2500 journal, 5.6350 housing bore, 1.744 length
78N5957Bearing main pair■025
78N5958-FBearing main pair■050
 
 D348BRG3NOTE:Late eng use: (7) 4W5488, (2) 9S1162; 1.886 length
74W5488Bearing main pairStd, 5.2500 journal, 5.635Q housing bore, 1.886 length [repl 8N5622]
74W5689Bearing main pair.025 [repl 8N6528]
74W5690-BBearing main pair.050 [repl 8N6529]
 
29S1162Thust washer0.186 thick
 
127N2581Bearing rod pairStd, 4.3745/4.3755 jaurnal, 4.7210 housing bore, 1.373 length, notched oil groove
Early and Mid engines
127N2582-FBearing rod pair■025
127N2583-BBearing rod pair■050
 
121W8539Bearing rod pairStd, 4.3742/4.3752 journal, 4.7210 housing bore, 1.373 length, short oil groove
Late engines
124W5693Bearing rod pair.025 [repl 8N5948]
124W5694Bearing rod pair■050

 

Caterpillar

Diesel 1786 CID

D348/29.3L

(Continued)

 12 Cylinder Bore 5.400 Stroke 6.500 
 
12 8N2018Bushing con rodWide taper rod, 1.9845 IDf 2.1825 0Dr 1.875 OAL (can use 4P8495)

 

GASKET & SEALS 
 CATGASKETNOTEFor gasket sets: Call with Serial and Arrangement Numbers
CAMSHAFT 
 CAMSHAFTCAMSHAFTRemanufactured available, call with casting number
VALVE TRAIN 
 CYLHEADNOTEFor complete and bare cylinder heads – Refer to Cylinder Head Catalog or Call with casting
241N4885Valve intake1.771 head diar 5.997 OAL [repl 1P0407]
247E7830Valve exhaust1.646 head diar 5.997 length [repl 1P1081]
962A4429Valve lock0.372 stem diar 2Gr 7 degree
486N2236Valve guide[repl 2N3293]
483S3018Valve spring 
482S2813-BRotator 
249M3205Insert intake 
241W5283Valve insertExhaust, IPD standard size 1.692″
FUEU INJECTOR 
m8N1831-FNozzleCapsule nozzle (repl 7S1059)
Caterpillar

Diesel 2382 CID

D349 / 39.0L 16 Cylinder Bore 5.400 Stroke 6.500 
CYLINDER KIT 
16 PLG8N0931Cylinder kit5.4QQ bore, 2.00 pin, PC, 4 valve relief [8N0931 piston, 8NQ822 rings, 7N9808 pin, 3F8513 retainers,
  1260739 liner] 
16 8N 的 31Piston body5.4000 bore, 2.00 pin, PCf 4 valve relief, 1/8 oil ring
16 8N0822Ring set1/8 keystone top ring [8N0502 top, 2P2817 mid, 7M7078 oil] 1 cyl set
16 7N98的Piston pin2.000 dia, 4.292 length 
32 3F8513Retiner piston pin   
16 1260739Cylinder liner5.4QQQ bore [uses (3) 3S3978, (1) 9L5854 seals] [repl 6M8700]
16 5P8789Cylinder liner oring kitContains: (3) 3S3978, (D9L5854
48 3S3978Cylinder liner oring   
16 9L5854Cylinder liner oringUpper band seal, 1 per liner 
BEARINGS 
9 8N6652Bearing main pairStd, 5.2500 journal, 5.G35Q housing bore, 1.744 length
9 8N5957Bearing main pair■025  
9 8N5958-FBearing main pair.050  
 
2 9S1162Thust washer0.186 thick  
 
16 7N2581Bearing rod pairStd, 4.3745/4.3755 journal, 4.7210 housing bore, 1.373 length, notched oil groove
Early engines
16 7N2582-FBearing rod pair■025  
16 7N2583-BBearing rod pair.050  
 
16 1W8539Bearing rod pairStd, 4.3742/4.3752 journal, 4.7210 housing bore, 1.373 length, short oil groove
Late engines
16 4W5693Bearing rod pair.Q25 [repl 8N5948] 
16 4W5694Bearing rod pair■050  
 
16 8N2018Bushing con rodWide taper rod, 1.9845 ID, 2.1825 0D, 1.875 OAL (can use 4P8495)
GASKET & SEALS 
CATGASKETNOTEFar gasket sets: Call with Serial and Arrangement Numbers
CAMSHAFT 
CAMSHAFTCAMSHAFTRemanufactured available, call with casting number
VALVE TRAIN 
CYLHEADNOTEFor complete and bare cylinder heads – Refer to Cylinder Head Catalog or Call with casting
32 1N4885Valve intake1.771 head dia, 5.997 OAL [repl 1P0407]
32 7E7830Valve exhaust1.646 head dia, 5.997 length [repl 1P1081]
128 2A4429Valve lock0.372 stem dia, 2G, 7 degree 
64 6N2236Valve guide[repl 2N3293] 
64 3S3018Valve spring   
64 2S2813-BRotator   
32 9M3205Insert intake   
32 1W5283Valve insertExhaust, IPD standard size 1.692″
FUEL | INJECTORI
16 8N1831-FNozzleCapsule nozzle (repl 7S1059) 
Tm^OIAIRI
TURBOTURBOCHARGERNew or remanufactured available, call far pricing
Caterpillar D353/24.2L6 Cylinder 
DieselBore 6.250 
1473 CIDStroke 8.000 

 

CYLINDER KIT

6PLG7N4515Cylinder kit6.25QQ bore, rectangular ring [7N4515 piston, 1W5105 rings, 7N981Q pin, 7M4926 retainers, 8N9174 liner]
6PLG7N5036Cylinder kit6.25QQ bore, keystone ring [7N5Q3G piston, 1N3601 rings, 7N981Q pin, 7M492G retainers, 8N9174 liner
68M3167Piston body6.25QQ bore, PC [3S4066]
67N4515Piston body6.2500 bore, PC [3S5502] rectangular compression ring
67N5036Piston body6.2500 bore, PC [7N5037] keystone compression ring
65H1085Piston pin2.4 dia; use with 8M3167 piston
67N9810Piston pin2.5 dia; use with 7N4515f 7N5Q36 piston [4L3843]
127M4926Retainer piston pinuse with 2.4DD dia pin [repl 6B2291]
61W5105Ring set6.25QQ bore, use with 8M3167f 7N4515 piston [9S8973]; rectangular comp ring
61N3601Ring set6.25QQ bore, use with 7N5036 piston; keystone comp ring
68N9174Cylinder liner6.25QQ bore
65P8970Cylinder liner oring kitFor one liner, contains: |3) 6L7815, (1) 8N4708
186L7815Cylinder liner oringLower liner seal; contained in 5P8970 seal kit
68N4708Cylinder liner oringUpper filler band; contained in 5P897Q seal kit

 

BEARINGS

 D353BRG1NOTE:Thick wall bearings, 0.2474 wall, 4.6250 journal, 5.124Q/5.1250 housing bore
49M3894-FBearing main pairStd; 0.2474 thickness
19M3893-FBearing main pairStd; 0.2474 thickness
19M3895-FBearing main pairStd; 0.2474 thickness
19M3896-FBearing thrust pairStd; 0.2474 thickness
 
49M4873-FBearing main pair.025
19M4872-FBearing main pair.025
19M4874-FBearing main pair.025
19M4875-FBearing thrust pair.025
 
49M4878-FBearing main pair.050
19M4877-FBearing main pair.Q5Q
19M4879-FBearing main pair.050
19M4880-FBearing thrust pair.050
 
 D353BRG2NOTE:Thin wall bearings, 0.1805 wall 4.G25Q journal, 4.9883/4.9893 housing bore
41N4317Bearing main pairStd; Q.1805 thick, 4.6250 journal, 4.989Q housing boref 1.874 length
11N4316Bearing main pairStd; 0.1805 thick, 4.6250 journal, 4.9890 housing bore, 2.382 length
11N4318Bearing main pairStd; 0.1805 thick, 4.6250 journal, 4.9890 housing bore, 2.972 length
11N4331Bearing thrust pairStd; Q.1805 thick, 4.6250 journal, 4.989Q housing boref 2.874 and 3.671 length
 
41N4320Bearing main pair.025
11N4319Bearing main pair.025
11N4321Bearing main pair.025
11N4332Bearing thrust pair.025
 
41N4323Bearing main pair.Q5Q
11N4322Bearing main pair.050
11N4324Bearing main pair.050
11N4333Bearing thrust pair.050
 
61N4336Bearing rod pairStd; 4.1250 journal, 4.4400 housing bore, 1.980 length [4冊884,9M3的2]
6CB778AL10-CLBearing rod pair.010
61N4337Bearing rod pair.Q25 [5H5993, 9M4871]

 

Caterpillar D353 / 24.2L6 Cylinder 
Diesel (Continued)Bore 6.250 
1473 CIDStroke 8.000 
61N4338Bearing rod pair.050 丨 5H5992,9M4876] 
  
62H2330Bearing cam  
12H7878Bearing cam  
  
64H9842Bushing con rod  
68N2275Bushing con rod2.450 ID, 2.678 0Df 2.250 length 

GASKET & SEALS

CATGASKETNOTEFor gasket sets: Call with Serial and Arrangement Numbers
1 2W6769-BSeal crankshaft frontPiston ring type
1 2W2191Seal crankshaft rearPiston ring type
1 2L3451Gasket oil pan 
CAMSHAFT 
CAMSHAFTCAMSHAFTRemanufactured available, call with casting number
12 2H3069-BLifterSolid
VALVE TRAIN 
CYLHEADNOTEFor complete and bare cylinder heads – Refer to Cylinder Head Catalog or Call with casting
D353HEAD1NOTE:Tapered groove valve stem with Q.4955 dia and 3 locks each
6 7M7817Valve intake2.505 head, 0.4955 stem, tapered groove [4H9805, 6H3186,1M7452]
6 8N3723Valve exhaust2.340 head, 0.4955 stem, tapered groove [4H9804, 6H3187, 8H7097,4N6883, 3N1141]
12 7S6323Valve springSingle spring
Single spring, use with 7N7639 rotocap
12 4F5408-FValve springOuter, 1.641 QD, 2.421 free
Dual spring
12 4F5409-FValve springInner, 1.145 0D# 2.359 free
Dual spring
6 4N3664Valve guideIntake; non flanged, use with 3N1414 spacer; for Q.4955 stem dia, 5.045 length
6 6N8847Valve guideExhaust; non flanged, use with 3N1414 spacer; for 0.4955 stem dia, 5.438 length
12 3N1414SpacerUse with non-flanged guide
36 3B1143Valve lockNo bead, for tapered valve stem, for 0.4995 stem
12 7N7639Rotator[fepl 8M7637,4S7468]
Use with single valve spring
12 7F7666-BRotator 
Use with dual valve springs
12 3H5867Retainer 
12 used; 6 used on intake with 3B1142 used on exhaust
6 3B1142Retainer 
6 used an exhaust with 3H5867 retainer on intake
6 5H1464Valve seatIntake
use with 6H8514 cylinder head
6 5S1757Valve seatIntake
6 5H1463Valve seatExhaust
use with 6H8514 cylinder head
6 8M4014Valve seatExhaust
D353HEAD2NOTE:Two groove valve stem with Q.3717 dia and 2 locks each
6 1W8606Valve intake2.5Q5 head, 0.3717 stem, 2 groove
6 2W3211Valve exhaust2.35Q head, 0.3717 stem, 2 groove
6 1W1822Valve exhaust2.350 head, 0.3717 stem, 2 groove
12 9M5349Valve springInner, 1.125 0D# 2.201 free
12 9M5350Valve springOuter, 1.654 0Df 2.574 free
6 2N9298Valve guideIntake; for 0.3717 stem, 5.065 length
6 2N9299Valve guideExhaust; for 0.3717 stem, 5.450 length

 

CaterpillarD353/24.2L 6 Cylinder 
Diesel(Continued) Bore 6.250 
1473 CID  Stroke 8.000 
12 3N1414SpacerUse with non-flanged guide 
24 2A4429Valve lock0.372 stem dia, 2Gr 7 degree 
12 7N7639Rotator[r 印I8M7637,4S7468] 
6 1W3062RetainerIntake; includes 8N778Q shield 
6 2N9297RetainerExhaust  
6 5S1757Valve seatIntake  
6 8M4014Valve seatExhaust  
FUEL I INJECTOR 
6 5H7936-FNozzle service groupContains: capsule nozzle, orings, seal ring
6 7M7431-FNozzle service groupContains: c叩如le nozzle, orings, seal ring
6 8N1831-FNozzleCapsule nozzle (repl 7S1059) 
COOLING SYSTEM 
2 2S4044Thermostat170 degree  
2 6N4540Thermostat180 degree  
2 4W4841Thermostat190 degree  
2 4L3848Seal thermostatUse with 6N4540 and 4W4841 thermostats
TU^OIAIR 
TURBOTURBOCHARGERNew or remanufactured available, call far pricing
BLOCK 
8N6938Insert block0.0625f stainless steel 
4 1W6265Sleeve blockZ stepped  
2 1W6266Sleeve blockZ stepped  
5P0936Sleeve blockL type. Cast Iron
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