2478868 KIT-SEAL Caterpillar parts
319D L, 319D LN, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 321D LCR, 323D L, 323D LN, 323D SA
Rating:
Alternative (cross code) number:
CA2478868
247-8868
2478868
CA2478868
247-8868
2478868
Weight: 0.47 pounds 0 kg.
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US$53.60
29 Sep 2025
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E320D Boom Arm Bucket Cylinder Seal Kits 2478868 2478974 2478888 Compatible with CAT 320D (2478888)
Generic E320D Boom Arm Bucket Cylinder Seal Kits 2478868 2478974 2478888 Compatible with CAT 320D
Generic E320D Boom Arm Bucket Cylinder Seal Kits 2478868 2478974 2478888 Compatible with CAT 320D
Replacement for fits 2478868 Boom Cylinder Seal Kit Fits CAT Fits Caterpillar 320D-L-LN-RR
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2023-10-10
2018-02-23
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Compatible equipment models: 2478868:
Information:
Illustration 1 g01445699
Note: Apply clean engine oil to the inlet valve stems and to the exhaust valve stems prior to installation in the cylinder head. (A) Height to the step in the valve guide ... 20.0 0.5 mm (0.79 0.02 inch)
Illustration 2 g01445692
Inlet valve (1) Inlet valve (B) Valve stem diameter ... 9.441 0.008 mm (0.3717 0.0003 inch) Minimum valve stem diameter ... 9.309 mm (0.3665 inch) (C) Valve face angle ... 60.75 0.25 degrees (D) Diameter of the valve head ... 44.50 0.13 mm (1.752 0.005 inch) (E) Minimum valve lip thickness ... 3.50 0.20 mm (0.138 0.008 inch) (2) 224-4441 Spring Quantity ... 4 Length under test force ... 50.47 mm (1.987 inch) Test force ... 160 13 N (36.0 2.9 lb) Approximate free length after test ... 64.1 mm (2.52 inch) Outside diameter ... 23.24 mm (0.915 inch)
Illustration 3 g01445690
Exhaust valve (3) Exhaust valve (F) Valve stem diameter ... 9.441 0.008 mm (0.3717 0.0003 inch) Minimum valve stem diameter ... 9.309 mm (0.3665 inch) (G) Valve face angle ... 45.75 0.25 degrees (H) Diameter of the valve head ... 41.50 0.13 mm (1.634 0.005 inch) (J) Minimum valve lip thickness ... 3.50 0.20 mm (0.138 0.008 inch) (4) 214-0586 Spring Quantity ... 4 Length under test force ... 52.95 mm (2.085 inch) Test force ... 320 31 N (71.9 7.0 lb) Approximate free length after test ... 62.7 mm (2.47 inch) Outside diameter ... 34.00 mm (1.339 inch)Note: Apply clean engine oil to the valve guide bore before installing the valve guides. (5) Valve guide Quantity ... 4 Bore of the installed valve guide ... 9.508 0.013 mm (0.3743 0.0005 inch) Maximum recommended diameter of the valve guide bore ... 9.544 mm (0.3757 inch)Note: Do not use a combination of a valve and a valve guide that has a difference of 0.13 mm (0.005 inch) or more. (6) Inlet valve insert Angle of the valve insert ... 30.75 0.25 degrees Diameter of the valve insert ... 45.525 0.013 mm (1.7923 0.0005 inch) Bore in the cylinder head for the valve insert ... 45.461 0.015 mm (1.7898 0.0006 inch) (7) Exhaust valve insert Angle of the valve insert ... 44.75 0.25 degrees Diameter of the valve insert ... 42.390 0.015 mm (1.6689 0.0006 inch) Bore in the cylinder head for the valve insert ... 42.320 0.015 mm (1.6661 0.0006 inch)
Caterpillar parts catalog:
Parts kit Caterpillar catalog:
320D, 320D L, 320D LN, 320D LRR, 320D2, 320D2 L, 323D L, 323D2 L, 324D, 324D L
320D, 320D FM, 320D FM RR, 320D L, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 320E L, 323D L, 323D2 L, 324D, 324D L, 324E, 324E L, 324E LN, 326D L
320D, 320D FM, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 321D LCR, 323D L, 323D LN, 323D SA, 323D2 L, 323E L, 324D, 324D L, 326D ...
320D, 320D FM, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 323D L, 323D LN, 323D SA
320D, 320D L, 320D LN, 320D LRR, 320D2, 320D2 L, 323D L, 323D2 L
320D, 320D L, 320D LN, 320D LRR, 320D2, 320D2 L, 323D L, 323D2 L
320D, 320D FM, 320D L, 323D L, 323D LN, 323D SA, 325D, 325D L, 328D LCR, 329D, 329D L
320D, 320D L, 323D L, 323D LN, 323D SA, 325D, 325D L, 328D LCR, 329D, 329D L
320D, 320D L, 323D L, 325D L, 329D, 329D L
320D, 320D L, 320E L, 325D, 325D L, 328D LCR, 329D, 329D L
320D, 320D L, 320D2, 320D2 L, 320E, 320E L, 320E LN, 325D, 325D L, 328D LCR, 329D, 329D L, 329E, 329E L, 329E LN
320D, 320D L, 320E, 320E L, 320E LN, 325D, 325D L, 328D LCR, 329D, 329D L
3334160
KIT-SEAT
311D LRR, 312D, 312D L, 312D2, 315D L, 319D, 319D L, 320D, 320D FM, 320D L, 320D LN, 320D LRR, 320D RR, 320D2 L, 323D L, 323D LN, 323D SA, 324D L, 325D L, 328D LCR, 329D, 329D L, 330D, 330D L, 336D, 3...
311D LRR, 312D, 312D L, 312D2, 315D L, 319D, 319D L, 320D, 320D FM, 320D L, 320D LN, 320D LRR, 320D RR, 320D2 L, 323D L, 323D LN, 323D SA, 324D L, 325D L, 328D LCR, 329D, 329D L, 330D, 330D L, 336D, 3...
2959619
KIT-SERVICE
312D, 312D L, 312E, 312E L, 313D, 315D L, 316E L, 318D L, 318E L, 319D, 319D L, 319D LN
312D, 312D L, 312E, 312E L, 313D, 315D L, 316E L, 318D L, 318E L, 319D, 319D L, 319D LN
3981911
KIT-SEAL
315D L, 318D2 L
315D L, 318D2 L
3465609
KIT-SEAL
315D L, 316E L, 318D2 L, 318E L, PIN GRAB
315D L, 316E L, 318D2 L, 318E L, PIN GRAB
3852942
KIT-SEAL
315D L, 316E L, 318D L, 318D2 L, 318E L
315D L, 316E L, 318D L, 318D2 L, 318E L
3852946
KIT-SEAL
315D L, 316E L, 318D L, 318D2 L, 318E L
315D L, 316E L, 318D L, 318D2 L, 318E L
319D L, 319D LN
319D L, 319D LN, 320D, 320D FM, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 321D LCR, 323D L, 323D LN, 323D SA, 323D2 L, 323E L, 32...
3640950
KIT-SEAL
319D L, 319D LN
319D L, 319D LN
319D L, 319D LN, 320D, 320D FM, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 321D LCR, 323D L, 323D LN, 323D SA, 324D, 324D L
2742656
KIT-SEAL
319D L, 319D LN
319D L, 319D LN
319D L, 319D LN, 320D, 320D FM, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 321D LCR, 323D L, 323D LN, 323D SA, 323D2 L, 323E L