CAT DIESEL ENGINE PARTS LIST
CAT D342, CAT D343, CAT D346, CAT D348
Caterpillar D342/20.4L 6 Cylinder
Diesel Bore 5.750
1246 CID Stroke 8.000
CYLINDER KIT
6 LK9111-F Cylinder kit 5.75Q bore, PC, straight rod, with plug, rect ring [4M9111 piston, 3S4Q31 rings, 7N98Q9 pinr 7M4926 retainers, 8N5G76 liner, 5P9221 seal kit]
6 PLG7N1366 Cylinder kit 5.75Q bore, PC, straight rod, with plug, key ring [8N5G7G liner, 7N136G piston, 8N5760 rings, 7N9809 pin, 7M4926 retainers, 8N5676 liner]
6 4M9111-F Piston body 5.75Q bore, PC, straight rod, with plug, rectangular ring; use with ring set 3S4031
6 7N1366 Piston body 5.750 bore, PC, straight rod, with plug, keystone ring
6 3S4031-F Ring set 5.7500 bore, rectangular ring [1 cyl set]
6 8N5760 Ring set 5.75QQ bore, keystone ring [1 cyl set]
6 7N9809-F Piston pin 2.3899 diar 4.726 length
12 7M4926 Retainer piston pin use with 2.4QQ dia pin [repl 6B2291]
6 8N5676 Cylinder liner 5.75QQ bore, bare liner
6 5P9221 Cylinder liner oring kit Contains:⑶ 6L7812,⑴ 8N4638
18 6L7812 Cylinder liner oring Lower liner s抽I; c加tained in 5P9221 seal kit
6 8N4638 Cylinder liner oring U卯er filler band; contained in 5P9221 seal kit
BEARINGS
D339BRG NOTE 3 styles of mains:⑴ 3.75CUft, 4.625 bore;⑵ 3.750 4.114 hsg bore,丨3) 4.261 4.625 hg bare
D339BRG1 NOTE Early main bearing set: 3.750 shaft, 4.625 housing bore
1 6F1931-F Bearing main pair Stdr rear; 3.7500 journal, 4.625 housing bore, 2.587 length
4 6F1932-F Bearing main pair Stdr 3.750 shaft, 4.625 housing
1 4H5510-F Bearing thrust pair Std, flanged; 3.75Q0 journaL 4.625 housing bore, 3.256 and 3.858 length
1 6H4510-F Bearing main pair Std; 3.7500 journal, 4.625 housing bore, 4.083 length
1 6H4498 Seal Front, Std
1 2H2451-F Bearing main pair .025, rear
5 2H2449-F Bearing main pair ■025, intermediate
1 4H5511-F Bearing thrust pair ■025, center
1 7H4448-F Bearing main pair .025, front
1 7H6747-B Seal Front Oversize
1 6F1935-F Bearing main pair .Q5Qf rear
5 6F1936-F Bearing main pair .050, intermediate
1 4H5512-F Bearing thrust pair ■050, center
1 7H4449-F Bearing main pair .050, front
1 7H6747-B Seal Front, Oversize
D339BRG2 NOTE Mid main bearing set:: 3.750 shaft 4.114 housing bore
5 9M2429-B Bearing main pair Stdr Intermediate and Bear; 3.7500 journal, 4.114 housing bore, 1.780 length
1 9M2430-F Bearing thrust pair Stdr Center; 3.75QQ journal, 4.114 housing bore, 3.256 and 3.858 length
1 9M2431-F Bearing main pair Stdr Front; 3.7500 journal, 4.114 housing bore, 4.086 length
1 3S7569 Adapter Std, Front
1 6H4498 Seal Front, Std
5 1S7573-B Bearing main pair .Q25f Intermediate and Rear
1 1S7574 Bearing thrust pair .025, Center
1 1S7575-F Bearing main pair .025, Front
1 4S5358 Adapter Front, Oversize
1 7H6747-B Seal Front, Oversize
5 1S7576 Bearing main pair .Q5Qf Intermediate and Rear
Caterpillar D342/20.4L 6 Cylinder
Diesel (Continued) Bore 5.750
1246 CID Stroke 8.000
1 1S7577 Bearing thrust pair .050# Center
1 1S7578 Bearing main pair .050, Front
1 4S5358 Adapter Front, Oversize
1 7H6747-B Seal Front, Oversize
D339BRG3 NOTE Late main bearing set: 4.261 shaft, 4.625 housing bore
6 8N7923 Bearing main pair Std; Front, Intermediate, Rear; 4.2610 joumal, 4.6250 housing bare, 1.78Q length [repl 4S6581]
1 8N7928 Bearing thrust pair Std; Center; 4.2610 journal, 4.6250 housing bare, 3.248 and 3.858 length [repl 4S6582]
6 8N7924 Bearing main pair .025; Front, Intermediate, Rear [repl 4S9396]
1 8N7929 Bearing thrust pair .025; Center [repl 4S9397]
6 8N7925-F Bearing main pair .050; Front, Intermediate, Rear [repl 4S9398]
1 8N7930-F Bearing thrust pair .050; Center [repl 4S9399]
6 2M6499 Bearing rod pair Std, 3.6250 journal, 3.967Q housing bore, 2.563 length
Eariy, Mid
6 2M6500-B Bearing rod pair ■025
6 2M6501-B Bearing rod pair ■050
6 8N7933 Bearing rod pair Std; 3.6250 journal, 3.9G7Q housing bore, 2.000 length
Late
6 8N793310-F Bearing rod pair ■010
6 8N7934 Bearing rod pair ■025
6 8N7935-F Bearing rod pair ■050
3 8F8523 Bearing cam 2.010 0AL
2 4H9640 Bearing cam 1.200 0AL
6 4M9183 Bushing con rod 2.380 ID, 2.617 00, 2.06 OAL
6 1599X Bushing con rod [Discontinued] 2.350 ID, 2.687 0D, 2.067 QAL; Full round bushing; use with rod 7B6225, 7B6625
GASKET & SEALS
CATGASKET NOTE For gasket sets: Call with Serial and Arrangement Numbers
CAMSHAFT
1W3176 Camshaft [OEM] (9Y3230 cam kit) Call for price and availability of remanufactured
5S1220-B Litter
VALVE TRAIN
CYLHEAD NOTE For complete and bare cvlinder heads – Refer to Cylinder Head Catalog or Call with casting
D339HEAD1 EARLY HEAD Tapered groove valve stem with Q.4955 dia and 3 locks each, flanged guide
6 8H1993 Valve intake 2.343 head dia, 9.297 0AL# 0.4955 stem dia, tapered groove [repl 7F5310]
6 8H1994 Valve exhaust 2.282 head dia, 9.266 length, Q.4955 stem dia, tapered groove [repl 7F4784, 5F8365, 1H9292]
12 4F5409-F Valve spring Inner, 1.145 0D# 2.359 free
12 4F5408-F Valve spring Outer, 1.641 00,2.421 free
6 2S0893-B Valve guide Intake, flanged; for 0.4955 stem dia [repl 6F5263]
6 1S6654-B Valve guide Exhaust, flanged; for 0.4955 stem dia
36 3B1143 Valve lock No bead, for tapered valve stem, for 0.4995 stem
12 7F7666-B Rotator
D339HEAD2 MID HEAD Tapered groove valve stem with Q.4955 dia and 3 locks each, nan-flanged guide
6 8H1993 Valve intake 2.343 head dia, 9.297 DAL# 0.4955 stem dia, tapered groove [repl 7F5310]
6 8H1994 Valve exhaust 2.282 head dia, 9.266 length, 0.4955 stem diaf tapered groove [repl 7F4784,5F8365,1H9292]
12 9M5349 Valve spring Inner, 1.125 0D# 2.201 free
Caterpillar D342/20.4L 6 Cylinder
Diesel (Continued) Bore 5.750
1246 CID Stroke 8.000
12 9M5350 Valve spring Outer, 1.654 0D, 2.574 free
12 7N2051 Valve guide Both, non-flanged; for 0.4955 stem dia; use with 3N1414 spacer
12 3N1414 Spacer Use with non-flanged guide
36 3B1143 Valve lock No bead, for tapered valve stem, for 0.4995 stem
12 7N7639 Rotator [repl 8M7637f4S7468]
D339HEAD3 LATE HEAD Two groove valve stem with 0.3717 dia and 2 locks each, non-flanged guide
6 1W1818 Valve intake 2.343 head diar 9.297 0ALf 0.3717 stem diar 45 degr 2G
6 1W1819 Valve exhaust 2.282 head diar 9.266 length, 0.3717T stem diar 45 degr 2G
12 9M5349 Valve spring Inner, 1.125 0Df 2.201 free
12 9M5350 Valve spring Outer, 1.654 QDr 2.574 free
12 1W1816 Valve guide Both, non-flanged; for 0.3717 stem dia; use with 3N1414 spacer
12 3N1414 Spacer Use with non-flanged guide
24 2A4429 Valve lock 0.372 stem dia, 2Gr 7 degree
12 7N7639 Rotator [repl 8M7637r4S7468]
FUEL I INJECTOR
6 8N1831-F Nozzle Capsule nozzle (repl 7S1059)
Tm^OIAIR
TURBO TURBOCHARGER New or remanufactured available, call for pricing
Caterpillar G342/20.4L 6 Cylinder
Gas Bore 5.750
1246 CID, Natural Gas Stroke 8.000
CYLINDER KIT
6 PLG7M3681 Cylinder kit 7.5:1 CR
6 PLG7M3680 Cylinder kit 10.5:1 CR
6 7M3681 Piston body 7.5:1 CR
6 7M3680 Piston body 10.5:1 CR
6 7N9809 Piston pin 2.3899 diar 4.726 length
7M4926 Retainer piston pin use with 2.4QQ dia pin [repl 6B2291]
了 3S4058 Ring set
6 8N5676 Cylinder liner 5.75QQ bore, bare liner
了 5P9221 Cylinder liner oring kit Cd_ins:⑶ 6L7812, (1) &N4638
BEARINGS
D339BRG NOTE 3 styles of mains:⑴ 3.750 Sft, 4.625 hsg bdre;⑵ 3.750 Sft, 4.114 hsg bore,⑶ 4.26Uft, 4.625 hg bore
D339BRG1 NOTE Early main bearing set: 3.750 shaft, 4.625 hausing bore
71B1-536
1 6F1931 Bearing main pair Std
4 6F1932 Bearing main pair Std
1 4H5510 Bearing thrust pair Std
1 6H4510 Bearing main pair Std
1 2H2451 Bearing main pair ■025″
4 2H2449 Bearing main pair ■025″
1 4H5511 Bearing thrust pair ■025″
1 7H4448 Bearing main pair .025H
1 6F1935 Bearing main pair ■050″
4 6F1936 Bearing main pair ■050″
丁 4H5512 Bearing thrust pair ■050″
丁 7H4449 Bearing main pair ■050H
r D339BRG2 NOTE Mid main bearing set:: 3.750 shaft, 4.114 housing bore
71B537-749
5 9M2429 Bearing main pair Std
丁 9M2430 Bearing thrust pair
丁 9M2431 Bearing main pair
5 1S7573 Bearing main pair ■025″
丁 1S7574 Bearing main pair ■025″
丁 1S7575 Bearing main pair ■025″
5 1S7576 Bearing main pair ■050″
丁 1S7577 Bearing main pair ■050″
丁 1S7578 Bearing main pair ■050″
D339BRG3 NOTE Late main bearing set: 4.261 shaft, 4.625 housing bore
71B750-Up
6 8N7923 Bearing main pair Std; Front, Intermediate, Rear; 4.2610 journal, 4.6250 housing bare, 1.78Q length [repl 4S6581]
丁 8N7928 Bearing thrust pair Std; Center; 4.2610 journal, 4.6250 housing bore, 3.248 and 3.858 length [repl 4S6582]
Caterpillar G342/20.4L 6 Cylinder
Gas (Continued) Bore 5.750
1246 CID, Natural Gas Stroke 8.000
6 8N7924 Bearing main pair .025; Front, Intermediate, Rear [repl 4S9396]
1 8N7929 Bearing thrust pair .025; Center [repl 4S9397]
6 8N7925 Bearing main pair ■05(r
1 8N7930 Bearing main pair ■050″
6 2M6499 Bearing rod pair Std, 3.6250 journal, 3.967Q housing bore, 2.563 length
71B1-749
6 2M6500 Bearing rod pair .025H
6 2M6501 Bearing rod pair ■050H
6 8N7933 Bearing rod pair Sfd; 3.6250 journal, 3.967D housing bore, 2.000 length
71B750-Up
6 8N7934 Bearing rod pair ■025
6 8N7935 Bearing rod pair .Q5Q; Partial grove; 2.000 0AL
2 4H9640 Bearing cam 1.200 0AL
3 8F8523 Bearing cam 2.010 0AL
1 6H4498 Seal Front, Std
71B1-749
6 4M9183 Bushing con rod 2.380 ID, 2.617 0Df 2.06 0AL
2 4H9640 Bearing cam 1.200 0AL
GASKET & SEALS
1 342071 Set overhaul Non spacer plated block
1 342081 Set overhaul Spacer plated block
1 342072 Set inframe Non spacer plated block
1 342082 Set inframe Spacer plated block, composite head gasket
1 342073 Set cylinder head Multiple, Non spacer plated block
1 342083 Set cylinder head Multiple, Spacer plated block
1 7N9352 Gasket valve cover
1 2P3759 Gasket oil pan
1 8H7319 Seal crankshaft front
71B1-749
1 2S1509 Seal crankshaft front
71B750-Up
1 9N2539 Seal crankshaft front
71B750 -Up Oversize Use With 9JQ110
1 9J0110 Sleeve front
71B 750- Up Use With 9N2539
1 2W2191 Seal crankshaft rear Piston ring type
71B750-Up
CAMSHAFT
6 5S1220 Lifter
12 1A0744 Screw rocker arm adj
12 1B4204 Nut Rocker arm adjusting
12 3F7445 Bushing rocker arm
VALVE TRAIN I
CYLHEAD NOTE For complete and bare cylinder heads – Refer to Cylinder Head Catalog or Call with casting
Caterpillar G342/20.4L 6 Cylinder
Gas (Continued) Bore 5.750
1246 CID, Natural Gas Stroke 8.000
D339HEAD4
Head using 3/8″ stem valves
6 1W1819 Valve exhaust 2.282 head dia, 9.266 length, 0.3717T stem dia, 45 deg, 2G
6 1W1818 Valve intake 2.343 head dia, 9.297 0AL# 0.3717 stem dia, 45 deg, 2G
12 9M5349 Valve spring Inner, 1.125 0D# 2.201 free
12 9M5350 Valve spring Outer, 1.654 0Df 2.574 free
12 1W1816 Valve guide Both, non-flanged; for 0.3717 stem dia; use with 3N1414 spacer
24 2A4429 Valve lock 0.372 stem dia, 2G, 7 degree
12 7N7639 Rotator [rep( 8M7637r4S7468]
12 2N9297 Retainer Exhaust
12 3N1414 Spacer Use with non-flanged guide
6 8M9810 Valve insert Exhaust
6 9M8745 Valve insert Intake
28 3B0623 Plug
2 5M6214 Plug
D339HEAD5
Head using 1/2″ stem valves
6 8H1993 Valve intake 2.343 head dia, 9.297 QAL# 0.4955 stem dia, tapered groove [repl 7F5310]
6 8H1994 Valve exhaust 2.282 head dia, 9.266 length, 0.4955 stem dia, tapered groove [repl 7F4784,5F8365, 1H9292]
12 9M5349 Valve spring Inner, 1.125 0D# 2.201 free
12 9M5350 Valve spring Outer, 1.654 0Df 2.574 free
12 7N2051 Valve guide Both, non-flanged; for 0.4955 stem dia; use with 3N1414 spacer
36 3B1143 Valve lock No bead, for tapered valve stem, for 0.4995 stem
12 7N7639 Rotator [repl 8M7637,4S7468]
12 3B1142 Retainer
12 3N1414 Spacer Use with non-flanged guide
6 8M9810 Valve insert Exhaust
6 9M8745 Valve insert Intake
4 3B0622 Plug
6 7L0917 Spark plug adapter
6 6L1576 Gasket spark plug adp Metal gasket
6 6L7816 Seal spark plug adp
71B495-Up
6 6B7021 Seal spark plug adp
71B1-494
24 5H7071 Water director
CRANKSHAFT
1 3S7569 Adapter crankshaft seal Rear
71B1-749
1 4S7793 Thrower crankshaft Rear
71B750-Up
1 1S8607 Baffle crankshaft Rear
71B750-Up
COOLING SYSTEM I
2 9S3808 Thermostat 170F degree
71B1-220
2 6I4954 Thermostat 170F degree
71B221-378
Caterpillar G342/20.4L 6 Cylinder
Gas (Continued) Bore 5.750
1246 CID, Natural Gas Stroke 8.000
2 4W4794 Thermostat Used with 7W8066 water lines group only, 180 degree [new# 2477133]
71B379-Up
1 6V4553 Set water pump
71B1-233Q
1 5P9241 Set water pump
71B2331-Up
1 1W7035 Kit water pump rebuild
1 IPD7035 Kit water pump overhaul
1 4N7526 Seal assembly
71B1-2330
1 6N9313 Seal assembly
71B2331 -Up
1 6L6459 Shaft water pump Fresh water pump
1 3S3535 Seal rubber Use with 2S3966
1 2S3966 Ring Use with 4N7526
8 5H4342 Washer
1 4H9836 Seal rubber
1 4H8891 Gasket
1 4H8890 Gasket
1 1B4116 Bearing water pump
1 3L7685 Lock
1 2A0053 Nut
BLOCK
1 8N6150 Insert block Stainless steel .060″
1 8N6742 Insert block Stainless steel .125″
1 5P6595 Sleeve block nT stepped
1 5P65950/S Sleeve block “2” stepped, .015 oversize
Caterpillar D343/1693/14.6L 6 Cylinder
Diesel Bore 5.400
893 CID Stroke 6.500
CYLINDER KIT
6 PLG9N2874 Cylinder kit 5.4QQ bore, 2.00 pin, PC [9N2874 piston, 8N0822 rings, 7N9806 pin, 3F8513 retainers, 1260739 liner]
Replaces LK0735 cylinder kit in sets
6 LK0735-F Cylinder kit 5.4QQQ bore, PC, 2.000 pin, straight rod, dual ni, 1/4 oil ring [7N0735 piston, 1PQ734 rings, 7N9806 pin,
7E5G65 retainers, 1260739 liner, 5P8789 seal kit]
6 9N2874 Piston body 5.4QQ bore, 2.00 pin, PC, straight rod, 4 valve relief with plug, 1/8 oil ring
Replaces 7NQ735 piston in sets
6 7N0735-F Piston body 5.4QQQ bore, 2.QQ pin, PC, straight rod, early type piston L/F, dual-ni, 1 /4 oil ring groove
6 8N0822 Ring set 1/8 keystone top ring [8N0502 top, 2P2817 mid, 7N7078 oil] 1 cyl set
Used with 9N2874 piston body
6 1P0734-F Ring set 5.4000 bore, 1 /4 oil ring [1 cyl set]
Used with 7N0735 piston body
6 7N9806 Piston pin 2.000 dia, 4.525 length {straight and narrow taper rod)
12 3F8513 Retiner piston pin
Used with 9N2874 piston body
12 7E5665 Retainer piston pin Use with 2.QQQ pin diameter [repl 8N7295]
Used with 7N0735 piston body
6 1260739 Cylinder liner 5.4QQQ bore [uses (3) 3S3978, (1) 9L5854 seals] [repl 6M8700]
6 5P8789 Cylinder liner oring kit Contains: (3) 3S3978, (D9L5854
18 3S3978 Cylinder liner oring
6 9L5854 Cylinder liner oring Upper band seal, 1 per liner
BEARINGS
6 7W2138 Bearing main pair Std, 4.500 journal, 4.88GQ housing bore, 1.500 length
6 8N5346 Bearing main pair ■025
6 8N5347 Bearing main pair ■050
1 7W2137 Bearing thrust pair Stdf 4.500 journal 4.8860 housing bore, 1.500 and 2.088 length
1 8N5341 Bearing thrust pair .025
1 8N5342 Bearing thrust pair ■050
6 7W2136 Bearing rod pair Std, 3.540 journal, 3.85GQ housing bore, 1.776 length
6 8N5339 Bearing rod pair ■025
6 8N5338 Bearing rod pair .050
12 5M3560 Bearing cam 2.885 shaft, 3.127 OD, 0.744 OAL
2 5M3603 Bearing cam 1.878 shaft, 2.127 0D# 0.720 OAL
6 1M6107 Bushing con rod 2.001 ID, 2.183 0D, 1.875 OAL
GASKET & SEALS
CATGASKET NOTE For gasket sets: Call with Serial and Arrangement Numbers
CAMSHAFT
CAMSHAFT CAMSHAFT Remanufactured available, call with casting number
VALVE TRAIN
CYLHEAD NOTE For complete and bare cylinder heads – Refer to Cylinder Head Catalog or Call with casting
12 1N4885 Valve intake 1.771 head dia, 5.997 OAL [repl 1P0407]
12 7E7830 Valve exhaust 1.646 head dia, 5.997 length [repl 1P1081]
48 2A4429 Valve lock 0.372 stem dia, 2Gr 7 degree
24 6N2236 Valve guide [repl 2N3293]
24 2S4213 Valve spring
24 4N6761 Rotator
12 9M3205 Insert intake
12 1W5283 Valve insert Exhaust, IPD standard size 1.692″
Caterpillar
Diesel 893 CID
D343/1693/14.6L(Continued)
6 Cylinder Bore 5.400 Stroke 6.500 FUEL | INJECTOR
6 8N1831-F Nozzle Capsule nozzle (repl 7S1059)
6 8N3176-F Nozzle Capsule nozzle (repl 7M4190)
TUI^OIAIR l
TURBO TURBOCHARGER New or remanufactured available, call for pricing