2008/02/25 Caterpillar

Landfill Compactor:

816FSeries 2 (S/N: BZR1-UP)

Soil Compactor:

815FSeries 2 (S/N: BYN1-UP)

Excavator:

330D (S/N: RDA1-UP; KAB1-UP; NBD1-UP; GGE1-UP; B6H1-UP; EAH1-UP; THJ1-UP; E4K1-UP; FFK1-UP; H3K1-UP; L2K1-UP; PCK1-UP; LEM1-UP; LRM1-UP; ERN1-UP; JLP1-UP; MWP1-UP; LDR1-UP; HAS1-UP; RAS1-UP; MEY1-UP)

Track Feller Buncher:

511 (S/N: 5111-UP)

521 (S/N: 5211-UP)

522 (S/N: 5221-UP)

541 (S/N: 5411-UP)

Motor Grader:

12H (S/N: CBK1-UP; AMZ1-UP)

160M (S/N: B9E1-UP; B9L1-UP)

Mobile Hydraulic Power Unit:

330D MHPU (S/N: D3D1-UP; H3D1-UP)

Track-Type Loader:

973C (S/N: LDX1-UP)

Track-Type Tractor:

D6RSeries III (S/N: GJB1-UP; WCB1-UP; HDC1-UP; TBC1-UP; HCD1-UP; HKE1-UP; WRG1-UP; MTJ1-UP; DMK1-UP; JEK1-UP; EXL1-UP; DLM1-UP; LFM1-UP; LGP1-UP; DPS1-UP; MRT1-UP)

D6T (S/N: JHB1-UP; SMC1-UP; DJG1-UP; WCG1-UP; WFH1-UP; KJL1-UP; SKL1-UP; GCT1-UP; LAY1-UP)

Wheel Dozer:

814FSeries 2 (S/N: BXG1-UP)

Wheel Tractor-Scraper:

627G (S/N: DBD1-UP)

637G (S/N: DFJ1-UP)

Service Magazine, SEPD0929, 25 February 2008, "A New Plug and O-ring Are Now Used on the Cylinder Head". Disregard the previous article, refer to the article that follows.

Description of Change:

Illustration 1	g01459610

A new plug assembly (1) is used on the machines that are listed above. The new plug assembly has tighter tolerances that improve the sealing capability of the plug.

Adaptable To: The 321-8638 Plug As is a direct replacement for the 183-3407 Plug As. If a repair is made because of a 183-3407 Plug As, replace all of the 183-3407 Plug As with the 321-8638 Plug As along the high-pressure oil rail in the cylinder head.

Plug torque ... 35 ± 3.5 N·m (26 ± 3 lb ft)

The new plug assembly is adaptable back to the first production of the listed machines.