7J8955 RING (back-up) Caterpillar parts
215, 227, 231D, 235, 235B, 235C, 235D, 834H, 836, 936, 936F, 963, 963B, 963C, 973, 973C, D5H XL, D5R LGP, D6H, D6H XL, D6H XR, D6M, D6N, D6N LGP, D6R, D6R II, D6R III, D6R STD, D6T, D6T LGP, D6T XL, D...
Rating:
Alternative (cross code) number:
CA7J8955
7J-8955
7J8955
CA7J8955
7J-8955
7J8955
Weight: 0.01 pounds 0 kg.
Information:
AXIAL WIDTH
1.52
mm
DASH SIZE
361
ID
155.15
mm
MATERIAL
Urethane Rubber - 90 Duro
OD
163.75
mm
RADIAL HEIGHT
4.3
mm
EXCAVATOR, WHEEL LOADER,
Cross Reference:
CATERPILLAR
7J8955,
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$10.05
15 Oct 2023
US: FinditParts Inc
7J8955 - RING-BACKUP fits Caterpillar (CAT)
BLUMAQ 7J8955 - RING-BACKUP fits Caterpillar (CAT)
BLUMAQ 7J8955 - RING-BACKUP fits Caterpillar (CAT)
Compatible equipment models: 7J8955:
Information:
Installation Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     367-3070     Fuel Injector Installer and Removal Tooling     2    
E     149-2955     Seal Protector     1    
F     149-2956     Seal Installer     1    
G     1U-5718     Vacuum Pump     1    
169-7372 Bottle Assembly     1    
4C-4057 Clear Plastic Tubing
7.92 mm (0.312 inch) OD     1    
4C-4055 Clear Plastic Tubing
6.35 mm (0.250 inch) OD     1    
H     417-4368     Reamer     1    
J     4C-6161     Tube Brush     1    
K     9U-6862     Tapered Brush     1    
L     4C-6774     Vacuum Gun Kit     1    
M     4C-5026     Tap Wrench     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Evacuate as much fuel and oil as possible from the cylinder head before installing the unit injector. Several evacuations may be necessary. Use Tooling (G) to remove the fuel and oil from the cylinder head.Note: Tooling (L) is available to clean loose material from the sleeve bore and the cylinder.
Inspect the unit injector sleeve for damage and carbon deposits.
Clean the carbon from the sleeve, the sleeve bore, and the end of the unit injector, if the unit injector is being reused. Clean the carbon from the seat area that is inside of the cylinder head. A fine grade of Scotch Brite material is preferred. Use Tooling (H) to clean the bore of the unit injector tip. Use the Surface Reconditioning Pad in order to clean the carbon in the cylinder head. Use Tooling (J) in order to remove the carbon from the surface of the sleeve.Note: Using power tools in order to rotate the material should not be necessary. The carbon in the sleeve is more removable than the carbon at locations that are exposed to higher temperatures.The following procedure is the preferred method of cleaning the sleeve bore.Place a 38 mm (1.5 inch) square piece of Scotch Brite material on the end of Tooling (K) . Twist Tooling (K) with Tooling (M) against the lower surface of the sleeve bore.The surface should be cleaned until the surface is smooth and shiny. The entire sleeve bore should be cleaned in order to remove any loose carbon particles.Note: Tooling (J) is available to clean loose material from the sleeve bore and the cylinder.
The correct procedures and tooling specifications must always be used. Failure to follow any of the procedures may result in damage, malfunction, or possible engine failure.
Note: New seals should be installed after each removal of the unit injector from the engine. To order O-ring seals for the unit injector, refer to the Parts Manual.
The O-ring seals and the backup rings must be installed in the correct orientation. Damaged seals will result in excessive oil consumption or excessive leakage under the valve
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     367-3070     Fuel Injector Installer and Removal Tooling     2    
E     149-2955     Seal Protector     1    
F     149-2956     Seal Installer     1    
G     1U-5718     Vacuum Pump     1    
169-7372 Bottle Assembly     1    
4C-4057 Clear Plastic Tubing
7.92 mm (0.312 inch) OD     1    
4C-4055 Clear Plastic Tubing
6.35 mm (0.250 inch) OD     1    
H     417-4368     Reamer     1    
J     4C-6161     Tube Brush     1    
K     9U-6862     Tapered Brush     1    
L     4C-6774     Vacuum Gun Kit     1    
M     4C-5026     Tap Wrench     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Evacuate as much fuel and oil as possible from the cylinder head before installing the unit injector. Several evacuations may be necessary. Use Tooling (G) to remove the fuel and oil from the cylinder head.Note: Tooling (L) is available to clean loose material from the sleeve bore and the cylinder.
Inspect the unit injector sleeve for damage and carbon deposits.
Clean the carbon from the sleeve, the sleeve bore, and the end of the unit injector, if the unit injector is being reused. Clean the carbon from the seat area that is inside of the cylinder head. A fine grade of Scotch Brite material is preferred. Use Tooling (H) to clean the bore of the unit injector tip. Use the Surface Reconditioning Pad in order to clean the carbon in the cylinder head. Use Tooling (J) in order to remove the carbon from the surface of the sleeve.Note: Using power tools in order to rotate the material should not be necessary. The carbon in the sleeve is more removable than the carbon at locations that are exposed to higher temperatures.The following procedure is the preferred method of cleaning the sleeve bore.Place a 38 mm (1.5 inch) square piece of Scotch Brite material on the end of Tooling (K) . Twist Tooling (K) with Tooling (M) against the lower surface of the sleeve bore.The surface should be cleaned until the surface is smooth and shiny. The entire sleeve bore should be cleaned in order to remove any loose carbon particles.Note: Tooling (J) is available to clean loose material from the sleeve bore and the cylinder.
The correct procedures and tooling specifications must always be used. Failure to follow any of the procedures may result in damage, malfunction, or possible engine failure.
Note: New seals should be installed after each removal of the unit injector from the engine. To order O-ring seals for the unit injector, refer to the Parts Manual.
The O-ring seals and the backup rings must be installed in the correct orientation. Damaged seals will result in excessive oil consumption or excessive leakage under the valve
Cat SIS web machinery list:
Parts ring Caterpillar catalog:
8X4086
RING-LOCK
834B, 834G, 834H, 834K, 986H, 988B, 988F, 988F II, 988G, 988H, 988K
834B, 834G, 834H, 834K, 986H, 988B, 988F, 988F II, 988G, 988H, 988K
4T3107
RING-BACKUP
777B, 777D, 980C, 980F, 980F II, D8L, D8N, R1600, R1600G, R1600H
777B, 777D, 980C, 980F, 980F II, D8L, D8N, R1600, R1600G, R1600H
1057262
RING-WEAR
322 LN, 322B L, 322B LN, 322C, 322C FM, 324D FM, 324D FM LL, 325B L, 328D LCR, 330, 330 FM L, 330 L, 330B, 330B L, 330C FM, 330D FM, 345B, 345B II, 345B II MH, 345B L, 345C, 345C L, 345C MH, 350, 350 ...
322 LN, 322B L, 322B LN, 322C, 322C FM, 324D FM, 324D FM LL, 325B L, 328D LCR, 330, 330 FM L, 330 L, 330B, 330B L, 330C FM, 330D FM, 345B, 345B II, 345B II MH, 345B L, 345C, 345C L, 345C MH, 350, 350 ...
7Y4945
RING-BACKUP
322 LN, 322B L, 322B LN, 322C, 322C FM, 324D, 324D FM, 324D FM LL, 324D LN, 324E LN, 325 LN, 325B L, 325C, 325D, 325D L, 328D LCR, 329D LN, 330, 330 FM L, 330 L, 330B, 330B L, 330C, 330C FM, 330C L, 3...
322 LN, 322B L, 322B LN, 322C, 322C FM, 324D, 324D FM, 324D FM LL, 324D LN, 324E LN, 325 LN, 325B L, 325C, 325D, 325D L, 328D LCR, 329D LN, 330, 330 FM L, 330 L, 330B, 330B L, 330C, 330C FM, 330C L, 3...
1U2218
RING-WEAR
5130, 5130B, 950H, D8L, D8N
5130, 5130B, 950H, D8L, D8N
7Y4941
RING-BACKUP
322B L, 322C, 322C FM, 324D, 324D FM, 324D FM LL, 325B L, 325C, 325C FM, 325D FM, 325D FM LL, 328D LCR, 329D LN, 330, 330 FM L, 330 L, 330B, 330B L, 330C, 330C FM, 330C L, 330C MH, 330D, 330D FM, 330D...
322B L, 322C, 322C FM, 324D, 324D FM, 324D FM LL, 325B L, 325C, 325C FM, 325D FM, 325D FM LL, 328D LCR, 329D LN, 330, 330 FM L, 330 L, 330B, 330B L, 330C, 330C FM, 330C L, 330C MH, 330D, 330D FM, 330D...
0965609
RING
322 LN, 322B L, 322B LN, 322C, 322C FM, 324D FM, 324D FM LL, 325 LN, 325B L, 328D LCR, 330, 330 FM L, 330 L, 330B, 330B L, 330C FM, 330D FM, 345B, 345B II, 345B II MH, 345B L, 345C, 345C L, 345C MH, 3...
322 LN, 322B L, 322B LN, 322C, 322C FM, 324D FM, 324D FM LL, 325 LN, 325B L, 328D LCR, 330, 330 FM L, 330 L, 330B, 330B L, 330C FM, 330D FM, 345B, 345B II, 345B II MH, 345B L, 345C, 345C L, 345C MH, 3...
6I6785
RING-SEAL
322B L, 322C FM, 325B L, 330, 330 FM L, 330 L, 330B L, 330C, 330C FM, 330C MH, 330D FM, 345B, 345B II, 345B II MH, 345B L, 345C, 350, 350 L, 568 FM LL, 834G, 834H, M325B, M330D, W330B, W345B II
322B L, 322C FM, 325B L, 330, 330 FM L, 330 L, 330B L, 330C, 330C FM, 330C MH, 330D FM, 345B, 345B II, 345B II MH, 345B L, 345C, 350, 350 L, 568 FM LL, 834G, 834H, M325B, M330D, W330B, W345B II
3K8692
RING-BACKUP
518, 518C, 844, 844H, 844K, 854G, 854K, D10N, D11N, D11R, D11T, D4HTSK II, D4HTSK III, D5HTSK II, D8R, D8R II, D8T, D9N, D9R, D9T
518, 518C, 844, 844H, 844K, 854G, 854K, D10N, D11N, D11R, D11T, D4HTSK II, D4HTSK III, D5HTSK II, D8R, D8R II, D8T, D9N, D9R, D9T
1317184
RING-WEAR
D8L, D9N, D9R, D9T
D8L, D9N, D9R, D9T
1583027
RING-BACKUP
D8N, D8R, D8R II, D8T
D8N, D8R, D8R II, D8T
5J0058
RING
824C, 824S, 834B, 834H
824C, 824S, 834B, 834H
7J9232
RING
235
235
6J9272
RING
227, 245
227, 245
8J3817
RING
235, 245, 992C
235, 245, 992C
9S4977
RING
D4D, D6C, D7F
D4D, D6C, D7F
8H3497
RING
120G, 12G, 130G, 14G, 16G, 235, 245, 508, 518, 528, 561B, 561D, 572G, 578, 583K, 589, 594, 594H, 621, 621B, 621R, 637D, 637E, 639D, 769C, 773B, 777, 777B, 785, 814, 814B, 815, 815B, 816, 824, 824B, 82...
120G, 12G, 130G, 14G, 16G, 235, 245, 508, 518, 528, 561B, 561D, 572G, 578, 583K, 589, 594, 594H, 621, 621B, 621R, 637D, 637E, 639D, 769C, 773B, 777, 777B, 785, 814, 814B, 815, 815B, 816, 824, 824B, 82...
7M2167
RING
561B, 561C, 561D, 941, 950, 955H, 977H, 977K, 983, D4D, D4E, D4E SR, D5, D5B, D5E, D6C, D6D, D6E SR, D7F, D7G, D9G
561B, 561C, 561D, 941, 950, 955H, 977H, 977K, 983, D4D, D4E, D4E SR, D5, D5B, D5E, D6C, D6D, D6E SR, D7F, D7G, D9G
5K1075
RING
14G, 14H, 14H NA, 14M, 16G, 16M, 215, 215B, 215C, 235, 235B, 235C, 245, 245B, 518, 528, 613, 613B, 623B, 633, 633D, 950, CW-14, PF-290B, PS-150B, PS-150C, PS-200B, PS-360B, PS-360C
14G, 14H, 14H NA, 14M, 16G, 16M, 215, 215B, 215C, 235, 235B, 235C, 245, 245B, 518, 528, 613, 613B, 623B, 633, 633D, 950, CW-14, PF-290B, PS-150B, PS-150C, PS-200B, PS-360B, PS-360C
8J6070
RING
225, 227, 229, 963
225, 227, 229, 963
8J1717
RING (Back-Up)
225, 225D, 227, 229, 229D, 231D, 235, 235B, 245, 245B, 365B, 365B II, 365C, 385C, 385C FS, 5080, 5090B, 5130, 5130B, 928HZ, 930G, 950G, 950G II, 962G, 962G II, D7H, D7R, D9R, D9T, IT62G, IT62G II
225, 225D, 227, 229, 229D, 231D, 235, 235B, 245, 245B, 365B, 365B II, 365C, 385C, 385C FS, 5080, 5090B, 5130, 5130B, 928HZ, 930G, 950G, 950G II, 962G, 962G II, D7H, D7R, D9R, D9T, IT62G, IT62G II
8J1714
RING
225
225
3N3097
RING
14G, 14H NA, 245, 518, 615, 615C, 623B, 910, 920, 930
14G, 14H NA, 245, 518, 615, 615C, 623B, 910, 920, 930
1M2910
RING
12E, 140B, 14E, D6C
12E, 140B, 14E, D6C