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SEAL-O-RING 4M8303 - Caterpillar


4M8303 SEAL-O-RING Caterpillar parts 10 FT, 10-20B, 118, 120G, 129, 12G, 12H, 12H ES, 12H NA, 130G, 140G, 140H, 140H ES, 140H NA, 143H, 14E, 14G, 14H NA, 160G, 160H, 160H ES, 160H NA, 163H NA, 1673C, 1693, 16G, 16H NA, 215, 225, 235, 235...
Rating:
28
Alternative (cross code) number:
CA4M8303
4M-8303
4M8303
Caterpillar 4M8303 SEAL-O-RING
Weight: 4 pounds 2 kg.
Information:
CROSS SECTION DIAMETER  2.62  mm
DASH SIZE  117 
ID  20.29  mm
MATERIAL  Nitrile (NBR) Rubber - 75 Duro 
OD  0  mm

Buy SEAL-O-RING 4M8303 Caterpillar genuine, new aftermarket tractor parts with delivery
ARTICULATED TRUCK, WHEELED EXCAVATOR,

Compare Prices: .

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$4.68

19 Aug 2025

CN: KAWO
4M8303 Rubber O Ring Seal Fits Caterpillar Cat Spare Parts Replacement Aftermarket
Generic 【TRUCK ENGINE】1693 3406 || 【WHEEL TRACTOR】627G 627E 623B 637 623G 623E 631C 623F 633C 621E 621G 621S || 【HYDRAULIC CONTROL】183B || 【TRACK LOADER】983 || 【SOIL COMPACTOR】825B || 【PETROLEUM ENGINE】C-15
$50.39

28 May 2025

US: Sma5Wal
Replacement For Compatible With 4M8303 U SEAL Fits Caterpillar Models
ZZQYY
$52.49

26 Oct 2024

US: Sma5Wal
Replacement For Compatible With 4M8303 U SEAL Fits Caterpillar Models
ZZQYY
Number on catalog scheme: 10
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Compatible equipment models: 4M8303:

ASPHALT SCREED  10 FT   10-20B   8 FT  
CABLE CONTROL  118   129  
CHALLENGER  65C  
COMPACT WHEEL LOADER  910  
ENGINE - MACHINE  3304  
FELLER BUNCHER  FB518  
FORWARDER  584  
FRONT SHOVEL  5080  
LANDFILL COMPACTOR  816F   826C   826G  
MARINE AUXILIARY  3516B  
POWER MODULE  PM3412  
PUMPER  HT400  
QUARRY TRUCK  771C   771D   775B  
RECLAIMER MIXER  RM-250C   RM-300   RM-350B   RM-500  
ROAD RECLAIMER  RM-350B   RR-250   RR-250B  
SOIL COMPACTOR  815   815B   815F   825G  
SOIL STABILIZER  SS-250  
STABILIZER MIXER  SM-350  
TRACK LOADER  941   943   951B   955L   963   973   973C   977K   983  
TRACK SKIDDER  517   527   D4HTSK III   D5HTSK II  
VEHICULAR ENGINE  3508   3512   D348  
WHEEL SKIDDER  515   518   518C   525   528   528B   530B   545  
WHEELED EXCAVATOR  M312   M315   M318   W330B   Caterpillar

Information:

Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1U-6396 O-Ring Assembly Compound -
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Water pumps may leak as a result of damaged face seals. Relative movement between the shaft and the housing may allow the drive shaft to contact the face seal in the water pump. If contact occurs, the face seal will be damaged, and very early hour failures can result.
Refer to Special Instruction , REHS9244 for proper water pump handling procedures prior to installation.
Illustration 1 g01354173
Install the O-ring seal on water pump (3). Lubricate the O-ring seal with Tooling (A).
Place gasket (2) and use a suitable lifting device to install water pump (3) into position. Install bolts (1).
Install bolts (6).
Lubricate the O-ring seal on the tube with Tooling (A). Install the O-ring seal on the tube, if necessary.
Install seal (7) and pump inlet elbow (5) on water pump (3). Install bolts (4).
Fill the cooling system. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change".

Cat SIS web machinery list:

Caterpillar parts catalog
3306B Truck Engine 5KD00001-UP
3512 Industrial Engine SR200001-UP
3512B Generator Set 9G500001-UP
G3412C Generator Set SPY00001-UP
3512 Generator Set PLA00001-UP
3512 Generator Set PLJ00001-UP
3512B Generator Set PK200001-UP
3412B Marine Engine 60M00001-05160
3306 Truck Engine 76R02779-UP
G3304 ENGINE 37Y00001-UP
3304 Industrial Engine 10E00300-UP
3304 Marine Engine 13E00300-UP
3306 Generator Set 85Z00001-03763
3306 Marine Engine 84Z00001-UP
3204 Industrial Engine 6DC00001-UP
3306B Industrial Engine 7JB00001-UP
3304 Industrial Engine 4XB00001-UP
G3408 Engine 6NB00001-UP
3408B Generator Set 78Z01144-04866
3306 Truck Engine 63Z00001-22741
3408B Marine Engine 99U04604-07598
G3412 Engine 7DB00001-UP
G3512 ENGINE 4KC00001-UP
3408/3408B Truck Engine 28V04750-UP
3408B Industrial Engine 67U11092-UP
3508 Engine For Caterpillar Built Machines 97Y00001-UP
3508 Marine Engine 69Z00275-UP
3512 Marine Engine 50Y00647-01304
G3516 Engine 3RC00001-UP
3512 Vehicular Engine 51Y00513-UP
3516 Generator Set Engine 25Z00684-02188
3516 Marine Engine 29Z00818-01119
3508 Industrial Engine 68Z00694-01092
3512 ENGINE 49Y00486-00925
3516 Industrial Engine 27Z00650-00791
PR-1000C Cold Planer 5XC00138-UP (MACHINE) POWERED BY 3208 Engine
PR-450C Cold Planer 7PJ00001-UP (MACHINE) POWERED BY 3408 Engine
8-16B EXTEND-A-MAT Screed 3GL00001-UP
10-20B, 10-20WB EXTEND-A-MAT Screed 3HL00001-UP
PM-565 Cold Planer 3TK00001-00112 (MACHINE) POWERED BY 3408 Engine
10-20B 10-20WB EXTEND-A-MAT Screed 3EL00001-UP
RM-350, SM-350 Reclaimer, Stabilizer Mixer 1RM00001-00059 (MACHINE) POWERED BY 3406C Engine
CS-563 & CP-563 Vibratory Compactors 5AJ00001-UP (MACHINE) POWERED BY 3116 Engine
RR-250 Road Reclaimer 6ED00363-00440 (MACHINE) POWERED BY 3054 Engine
SS-250 Soil Stabilizer 6DD00324-00389 (MACHINE) POWERED BY 3406 Engine
SS-250B Soil Stabilizer RR-250B Road Reclaimer 3RR00001-UP (MACHINE) POWERED BY 3406C Engine
8B PAVEMASTER Screed 3JM00103-UP
10B PAVEMASTER Screed 3NM00001-UP
10B PAVEMASTER Screed 3MM00001-UP
PM-565 Cold Planer 3TK00113-UP (MACHINE) POWERED BY 3408 Engine
RM-350 SM-350 Reclaimer, Stabilizer Mixer 1RM00060-UP (MACHINE) POWERED BY 3406C Engine
PM-465 Cold Planer 5ZS00001-UP (MACHINE) POWERED BY 3406 Engine
CB-335D Vibratory Compactor 5PZ00001-UP (MACHINE) POWERED BY 3013 Engine
CB-335D Vibratory Compactor BBW00001-UP (MACHINE) POWERED BY 3014 Engine
RM-250C Reclaimer Mixer AWG00001-UP (MACHINE) POWERED BY 3406C Engine
DEUCE Engineer Support Tractor 7RR00001-UP (MACHINE) POWERED BY 3126 Engine
30-30 Engineer Support Tractor 9XW00001-UP (MACHINE) POWERED BY 3126 Engine
CS-573E CP-573E Vibratory Compactor ASY00001-UP (MACHINE) POWERED BY 3056E Engine
CS-573E CP-573E Vibratory Compactor ASZ00001-UP (MACHINE) POWERED BY 3056E Engine
RM-350B Reclaimer Mixer AXW00001-UP (MACHINE) POWERED BY 3406C Engine
CS-663E CP-663E Vibratory Compactor DAF00001-UP (MACHINE) POWERED BY 3056E Engine
CS-683E Vibratory Compactor DAD00001-UP (MACHINE) POWERED BY 3056E Engine
CS-663E CP-663E Vibratory Compactor ASB00001-UP (MACHINE) POWERED BY 3056E Engine
CS-683E Vibratory Compactor ASG00001-UP (MACHINE) POWERED BY 3056E Engine
CB-335D Vibratory Compactor D4E00001-UP (MACHINE) POWERED BY 3014 Engine
RM-500 Reclaimer Mixer ASW00001-UP (MACHINE) POWERED BY C15 Engine
CB-334E,CB-335E Vibratory Compactor C4J00001-UP (MACHINE) POWERED BY 3013C Engine
CP-573E Vibratory Compactor ASY00001-UP (MACHINE) POWERED BY 3056E Engine
RM-300 Rotary Mixer BWR00001-UP (MACHINE) POWERED BY C11 Engine
CB-334E,CB-335E Vibratory Compactor C4F00001-UP (MACHINE) POWERED BY 3024C Engine
PM-201 Cold Planer PNM00001-UP (MACHINE) POWERED BY C18 Engine
CS64 CP64 Vibratory Soil Compactor C6P00001-UP (MACHINE) POWERED BY C6.6 Engine
CS64 CP64 Vibratory Compactor C7F00001-UP (MACHINE) POWERED BY C6.6 Engine
CS74 CP74 Vibratory Compactor C8F00001-UP (MACHINE) POWERED BY C6.6 Engine
CS56B,CP56B,CS68B,CP68B Vibratory Soil Compactor M4M00001-UP (MACHINE) POWERED BY C6.6 Engine
CS76 CP76 Vibratory Compactor JCP00001-UP (MACHINE) POWERED BY C6.6 Engine
CS76 XT CP76 Vibratory Compactor C7L00001-UP (MACHINE) POWERED BY C6.6 Engine
CS68B CP68B Vibratory Soil Compactor LCF00001-UP (MACHINE) POWERED BY C4.4 Engine
CS74B CP74B Soil Compactor L7B00001-UP (MACHINE) POWERED BY C4.4 Engine
CS78B Vibratory Soil Compactor L8C00001-UP (MACHINE) POWERED BY C4.4 Engine
CS68B, CP68B Compactor 43900001-UP (MACHINE) POWERED BY C6.6 Engine
PM-565B Cold Planer 8GS00001-UP (MACHINE) POWERED BY 3408C Engine
RM-350B Reclaimer Mixer 7FS00001-UP (MACHINE) POWERED BY 3406C Engine
CS78B Compactor 44300001-UP (MACHINE) POWERED BY C6.6 Engine
CS74B Compactor 44100001-UP (MACHINE) POWERED BY C6.6 Engine
CS76B Vibratory Soil Compactor L9H00001-UP (MACHINE) POWERED BY C4.4 Engine
CS74B, CP74B, and CS78B Compactor-Vibratory Soil E7E00001-UP (MACHINE) POWERED BY C6.6 Engine
CS74B, CP74B Vibratory Compactor 49000001-UP (MACHINE) POWERED BY C4.4 Engine
CS78B, CS76B Vibratory compactor 49200001-UP (MACHINE) POWERED BY C4.4 Engine
CS68B, CP68B Vibratory Compactor 48800001-UP (MACHINE) POWERED BY C4.4 Engine
CS76B, CS78B Vibratory Soil Compactor CB700001-UP (MACHINE) POWERED BY C4.4 Engine
CS74B, CP74B Vibratory Soil Compactor CS400001-UP (MACHINE) POWERED BY C4.4 Engine
CS68B, CP68B Vibratory Soil Compactor CS800001-UP (MACHINE) POWERED BY C4.4 Engine
CS79B Vibratory Soil Compactor C7900001-UP (MACHINE) POWERED BY C6.6 Engine
CS74B, CP74B Vibratory Soil Compactor 51200001-UP (MACHINE) POWERED BY C7.1 Engine
CS68B, CP68B Vibratory Soil Compactor 50900001-UP (MACHINE) POWERED BY C7.1 Engine
CS68B, CP68B Vibratory Soil Compactor CM600001-UP (MACHINE) POWERED BY C7.1 Engine
CS74B, CP74B Vibratory Soil Compactor B7M00001-UP (MACHINE) POWERED BY C7.1 Engine
CS78B Vibratory Soil Compactor 51300001-UP (MACHINE) POWERED BY C7.1 Engine
CS78B, CS79B Vibratory Soil Compactor CM700001-UP (MACHINE) POWERED BY C7.1 Engine
CP76B Vibratory Soil Compactor J7600001-UP (MACHINE) POWERED BY C7.1 Engine
120G Motor Grader 11W01251-UP (MACHINE) POWERED BY 3304 Engine
140G Motor Grader 13W00741-00992 (MACHINE) POWERED BY 3306 Engine
793B Freeport Upgrade Custom Parts Manual Off-Highway Truck 4AR00001-UP (MACHINE) POWERED BY 3516B Engine
815B Soil Compactor 17Z00001-UP (MACHINE) POWERED BY 3306 Engine
3408B Industrial Engine 67U11092-UP
589 Track-Type Pipelayer Power Shift 31Z00001-UP (MACHINE) POWERED BY 3408 Engine
826C Landfill Compactor 87X00587-UP (MACHINE)
140G Motor Grader 72V10334-UP (MACHINE) POWERED BY 3306 Engine
12G Motor Grader 61M12027-UP (MACHINE) POWERED BY 3306 Engine
14G Motor Grader 96U07046-UP (MACHINE) POWERED BY 3306 Engine
130G Motor Grader 74V02321-UP (MACHINE) POWERED BY 3304 Engine
16G Motor Grader 93U02679-UP (MACHINE) POWERED BY 3406 Engine
140G Motor Grader 5MD00001-UP (MACHINE) POWERED BY 3306 Engine
12G Motor Grader 3WC01067-UP (MACHINE) POWERED BY 3306 Engine
160G Motor Grader 4JD00141-UP (MACHINE) POWERED BY 3306 Engine
578 Pipelayer 8HB00001-UP (MACHINE) POWERED BY 3406 Engine
D5H Track-Type Skidder Series II 7EG00001-UP (MACHINE) POWERED BY 3304 Engine
777C Truck 776C Tractor 2TK00001-UP (MACHINE) POWERED BY 3508 Engine
3306 Industrial Engine 64Z05381-UP


Parts seal Caterpillar catalog:

0931347 SEAL-O-RING
328D LCR, 345B II, 345B L, 345C, 345C L, 345D L, 349E L, 349E L VG, 349F L, 350, 365B, 365B II, 365B L, E650
1132073 SEAL-O-RING
345B II, 345B L, 350, 365B, 365B II, 365B L
0951694 SEAL-O-RING
330, 330 FM L, 330 L, 330B, 330B L, E120B, W330B
1307114 SEAL-O-RING
330B, 330B L, 345B, 345B L, W330B
2D6392 SEAL-O-RING
1090, 1140, 1150, 1160, 1190, 1190T, 120G, 120M, 120M 2, 1290T, 12E, 12G, 12H, 12H ES, 12H NA, 12M 2, 12M 3, 12M 3 AWD, 130G, 1390, 140G, 140H, 140H ES, 140H NA, 140M, 140M 2, 140M 3, 140M 3 AWD, 143H...
3E6760 SEAL-O-RING
12G, 12H, 12H ES, 12H NA, 140G, 140H, 140H ES, 140H NA, 143H, 14G, 14H NA, 160H, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 235B, 330, 330 FM L, 330 L, 3304, 3304B, 3306, 3306B, 3306C, 330B, 330B L, 3406...
8N5763 SEAL
120H, 120H ES, 120H NA, 12G, 12H, 12H ES, 12H NA, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 143H, 14G, 14H NA, 160H, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 235B, 245, 3114, 3116, 3126, 330, 330 FM...
5P8210 SEAL-O-RING
12G, 12H, 12H ES, 12H NA, 140G, 140H, 140H ES, 140H NA, 143H, 14G, 14H NA, 160H, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 235B, 245, 3176C, 3196, 330, 330 FM L, 330 L, 3304, 3304B, 3306, 3306B, 3306C, ...
5P6620 SEAL-O-RING
120G, 12G, 12H, 12H ES, 12H NA, 130G, 140G, 140H, 140H ES, 140H NA, 143H, 14G, 14H NA, 160G, 160H, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 215, 215B, 225, 229, 229D, 235, 235B, 235C, 235D, 245, 245B, ...
0335879 SEAL-O-RING
120G, 120H, 120H ES, 120H NA, 120M 2, 12G, 12H, 12H ES, 12H NA, 12M 2, 12M 3, 12M 3 AWD, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140M 2, 140M 3, 140M 3 AWD, 143H, 14G, 14H, 14H NA, 160G, 16...
9L9098 SEAL-CARBON STOP
1140, 1145, 1150, 1160, 120G, 12G, 12H, 12H ES, 12H NA, 130G, 140G, 140H, 140H ES, 140H NA, 143H, 14G, 14H NA, 160G, 160H, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 215, 225, 235, 235B, 235C, 245, 3145,...
8T2604 SEAL-LIP
120G, 120H, 120H ES, 120H NA, 12H, 12H ES, 12H NA, 135H, 135H NA, 140H, 140H ES, 140H NA, 143H, 14H NA, 160H, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 215B, 225, 229, 235, 245, 3204, 3304, 3304B, 3306,...
4N0260 SEAL-LIP TYPE
120G, 12G, 12H, 12H ES, 12H NA, 130G, 140B, 140G, 140H, 140H ES, 140H NA, 143H, 14G, 14H NA, 160G, 160H, 160H ES, 160H NA, 163H NA, 1673C, 16G, 16H NA, 215, 225, 229, 235, 235B, 245, 3204, 330, 330 FM...
1389507 SEAL-LIP TYPE
12G, 12H, 12H ES, 12H NA, 140G, 140H, 140H ES, 140H NA, 143H, 14G, 14H NA, 160H, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 235B, 3204, 330, 330 FM L, 330 L, 3304, 3304B, 3306, 3306B, 3306C, 330B L, 3406...
5F9144 SEAL-O-RING
120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 12G, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 12M 3 AWD, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 140M, 140M 2, 14...
6H9691 SEAL-O-RING
120G, 120H, 120K, 120K 2, 12G, 12H, 12H ES, 12H NA, 12K, 12M 3, 12M 3 AWD, 130G, 135H, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 140M 3, 140M 3 AWD, 143H, 14G, 14H, 14H NA, 160G, 160H, 160H ES, 160H...
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