2011/06/20 Caterpillar

Excavator:

311 (S/N: 9LJ1-UP; 5PK1-UP)

311B (S/N: 8GR1-UP; 8HR1-UP; 2LS1-UP; 2MS1-UP)

311C (S/N: PAD1-UP; CKE1-UP; CLK1-UP)

311D (S/N: CLA1-UP; LKA1-UP; PNJ1-UP; DWR1-UP; AKW1-UP; DDW1-UP)

312 (S/N: 6GK1-UP; 7DK1-UP)

312B (S/N: 8JR1-UP; 9GR1-UP; 9HR1-UP; 2NS1-UP; 3ES1-UP; 3FS1-UP; 9FS1-UP; 2KW1-UP; 6SW1-UP; 9NW1-UP)

312C (S/N: CBA1-UP; CAE1-UP; BWH1-UP; BNN1-UP; DBN1-UP; FDS1-UP; CBT1-UP)

312D (S/N: JBC1-UP; KCD1-UP; RKF1-UP; PHH1-UP; FBJ1-UP; LRK1-UP; XGK1-UP; RHL1-UP; DLP1-UP; KES1-UP; HCW1-UP; HJX1-UP; TGY1-UP)

313B (S/N: 9PR1-UP; BAS1-UP; AEX1-UP)

313C (S/N: WSA1-UP; HGF1-UP)

313D (S/N: LCE1-UP; LBR1-UP)

314C (S/N: KJA1-UP; PCA1-UP; KHB1-UP; SNY1-UP)

314D (S/N: BYJ1-UP; MFK1-UP; TXN1-UP; WLN1-UP; SBP1-UP; XHR1-UP; SSZ1-UP)

315 (S/N: 4YM1-UP; 6XM1-UP; 6YM1-UP)

315B (S/N: 1SW1-UP; 2DW1-UP; 3AW1-UP; 5SW1-UP)

315C (S/N: CFB1-UP; CJC1-UP; AKE1-UP; ANF1-UP; BTL1-UP; CFL1-UP; CFT1-UP)

315D (S/N: JHA1-UP; KBD1-UP; TLE1-UP; NCM1-UP; BZN1-UP; CJN1-UP; JGS1-UP)

317B (S/N: 9WW1-UP; 6DZ1-UP)

318B (S/N: ADC1-UP; AEJ1-UP; 5BJ1-UP; 3LR1-UP; 7KZ1-UP)

318C (S/N: FAA1-UP; GPA1-UP; BTG1-UP; DAH1-UP; CWP1-UP; MDY1-UP)

319C (S/N: KGL1-UP)

319D (S/N: ZCA1-UP; BZH1-UP; FMH1-UP; KTJ1-UP; WBJ1-UP; KFM1-UP; KRM1-UP; EAW1-UP; DAY1-UP; ZGZ1-UP)

320 (S/N: 9WG1-UP; 4ZJ1-UP; 7GJ1-UP; 8HJ1-UP; 3RK1-UP; 3XK1-UP; 4BK1-UP; 7WK1-UP; 8LK1-UP; 9KK1-UP; 1KL1-UP; 1TL1-UP; 2DL1-UP; 1XM1-UP; 3XM1-UP; 4JM1-UP)

320B (S/N: BBG1-UP; 3MR1-UP; 4MR1-UP; 4NR1-UP; 5BR1-UP; 6CR1-UP; 7JR1-UP; 1CS1-UP; 1XS1-UP; 2AS1-UP; 4FS1-UP; 5CS1-UP; 5MS1-UP; 6LS1-UP; 9WS1-UP; 4XW1-UP; 5GW1-UP; 6LW1-UP; 2WZ1-UP; 3YZ1-UP; 7ZZ1-UP; 8GZ1-UP)

320C (S/N: APA1-UP; BEA1-UP; EGA1-UP; FBA1-UP; GAA1-UP; GLA1-UP; MAA1-UP; PAA1-UP; ANB1-UP; BCB1-UP; BDB1-UP; BGB1-UP; FBB1-UP; GAB1-UP; MAB1-UP; PAB1-UP; AMC1-UP; HBC1-UP; MAC1-UP; PAC1-UP; GAD1-UP; BDE1-UP; NAE1-UP; ALF1-UP; DBG1-UP; EAG1-UP; GNG1-UP; JTG1-UP; AKH1-UP; SAH1-UP; BKK1-UP; BBL1-UP; EGL1-UP; JPL1-UP; CLM1-UP; BCN1-UP; SBN1-UP; BPR1-UP; TBR1-UP; HKT1-UP; ALX1-UP; BRX1-UP; CLZ1-UP)

320D (S/N: FNA1-UP; DFB1-UP; M4B1-UP; ZGB1-UP; HJC1-UP; DHE1-UP; MDE1-UP; TAE1-UP; A6F1-UP; A8F1-UP; KGF1-UP; KTF1-UP; MGG1-UP; MCH1-UP; TDH1-UP; DHK1-UP; FXK1-UP; XCK1-UP; FAL1-UP; GKL1-UP; RBL1-UP; PCM1-UP; CWN1-UP; KHN1-UP; SPN1-UP; WBN1-UP; WJN1-UP; BWP1-UP; BZP1-UP; GDP1-UP; AMR1-UP; AZR1-UP; PDS1-UP; SNS1-UP; YDS1-UP; DFT1-UP; EBT1-UP; EJT1-UP; SCW1-UP; GMX1-UP; PCX1-UP; PHX1-UP; CXY1-UP; EBY1-UP; BWZ1-UP; CYZ1-UP; JFZ1-UP; JGZ1-UP)

320S (S/N: 6KM1-UP)

321B (S/N: KGA1-UP; AKG1-UP; 9CZ1-UP)

321C (S/N: KBB1-UP; MCF1-UP; KCR1-UP; DAX1-UP)

321D (S/N: TXA1-UP; PBD1-UP; MPG1-UP; KBH1-UP; NAS1-UP; MDT1-UP; JCX1-UP; KBZ1-UP)

322 (S/N: 7WL1-UP)

322 L (S/N: 8CL1-UP)

322B (S/N: 3NR1-UP; 5CR1-UP; 8MR1-UP; 8NR1-UP; 1AS1-UP; 1YS1-UP; 1ZS1-UP; 2ES1-UP)

322C (S/N: DAA1-UP; FED1-UP; BTE1-UP; KCF1-UP; HBG1-UP; BKJ1-UP; BFK1-UP; HEK1-UP; BKM1-UP; BFN1-UP; BLP1-UP; BGR1-UP; EMR1-UP; MAR1-UP; ADX1-UP; BFX1-UP; BMX1-UP; BNY1-UP)

322L (S/N: 8ML1-UP; 9RL1-UP; 4RM1-UP)

322N (S/N: 9JL1-UP)

323D (S/N: RAC1-UP; SDC1-UP; WGC1-UP; CYD1-UP; SED1-UP; YSD1-UP; NDE1-UP; WNE1-UP; GTF1-UP; ZMF1-UP; CWG1-UP; JLG1-UP; LFL1-UP; BYM1-UP; PBM1-UP; NES1-UP; DKW1-UP; L5Z1-UP)

324D (S/N: LAB1-UP; EJC1-UP; MND1-UP; T2D1-UP; BYE1-UP; JJG1-UP; ECH1-UP; TRH1-UP; BTK1-UP; SYM1-UP; AWN1-UP; TSN1-UP; DFP1-UP; JZR1-UP; JAT1-UP; PYT1-UP; CJX1-UP)

325B (S/N: 8GM1-UP; 6DN1-UP; 7EN1-UP; 2JR1-UP; 8PR1-UP; 1GS1-UP; 4DS1-UP; 5BS1-UP)

325C (S/N: BLA1-UP; CRB1-UP; S2C1-UP; BTD1-UP; BFE1-UP; AMH1-UP; BKH1-UP; CSJ1-UP; BMM1-UP; BKT1-UP; BLX1-UP)

325D (S/N: GPB1-UP; NAC1-UP; KBE1-UP; PKE1-UP; KDG1-UP; C4H1-UP; DBH1-UP; PEH1-UP; ERK1-UP; RJK1-UP; LAL1-UP; MCL1-UP; PAL1-UP; CJM1-UP; AZP1-UP; DAP1-UP; A3R1-UP; GBR1-UP; SCR1-UP; T2S1-UP; CYW1-UP)

328D (S/N: SWF1-UP; BYH1-UP; GTN1-UP; MKR1-UP; RMX1-UP)

329D (S/N: MNB1-UP; XDB1-UP; BFC1-UP; BBF1-UP; CZF1-UP; DJF1-UP; L5G1-UP; L5H1-UP; JHJ1-UP; RSK1-UP; WDK1-UP; EBM1-UP; TPM1-UP; BYS1-UP; WLT1-UP; LFW1-UP; YFW1-UP; SCY1-UP; TAY1-UP; DTZ1-UP)

385C (S/N: WAW1-UP)

M313C (S/N: H2A1-UP; BDR1-UP)

M313D (S/N: W3H1-UP)

M315C (S/N: H2B1-UP; BDM1-UP)

M315D (S/N: W5M1-UP)

M316C (S/N: H2C1-UP; BDX1-UP)

M316D (S/N: KMA1-UP; W6A1-UP; D6W1-UP)

M318C (S/N: BEB1-UP; H2D1-UP; H2F1-UP; BCZ1-UP)

M318D (S/N: W8P1-UP; W8R1-UP; D8W1-UP; D9X1-UP)

M322C (S/N: H2E1-UP; H2G1-UP; BDK1-UP; BDY1-UP)

M322D (S/N: W2S1-UP; W2T1-UP; D2W1-UP; D3X1-UP)

M325B (S/N: BGN1-UP)

M325C (S/N: XJA1-UP; PAN1-UP)

M325D (S/N: EDF1-UP; KGG1-UP; KAY1-UP)

M330D (S/N: KRE1-UP)

W330B (S/N: AME1-UP)

Mobile Hydraulic Power Unit:

312C MHPU (S/N: CXX1-UP)

312D MHPU (S/N: DXH1-UP; M3L1-UP)

315D MHPU (S/N: HLG1-UP)

319D MHPU (S/N: KTJ1-UP)

320D MHPU (S/N: MMD1-UP; PRR1-UP; GPX1-UP)

323D MHPU (S/N: DCJ1-UP; GRL1-UP; GRN1-UP; DCY1-UP)

324D MHPU (S/N: M4A1-UP; KJR1-UP)

325C MHPU (S/N: MSG1-UP)

325D MHPU (S/N: SRC1-UP; C3N1-UP; H3N1-UP; X3N1-UP)

328D MHPU (S/N: JTC1-UP)

329D MHPU (S/N: J9D1-UP)

385C MHPU (S/N: M3P1-UP)

M316D MHPU (S/N: KMA1-UP)

A new key assembly is available for certain Excavators and Mobile Hydraulic Power Units. The surface treatment inside the key assembly has been improved to nickel plating. The nickel plating is more resistant to corrosion inside the key cylinder. If it becomes difficult to insert a key, use a commercial oil spray to lubricate the Key As. If it is still difficult to insert a key, replace the existing key assembly with a new 366-6478 Key As. If you replace the key assembly, make a mark on the back of the lock assembly as shown in Illustration 2. If the old cylinder is attached to the lock assembly, replace the old cylinder with a new cylinder

Illustration 1	g02477150
Location of corrosion

Illustration 2	g02477143
Lock assembly with marking on the back

Service Procedure

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Illustration 3	g02477087
(1) Stopper plate

1. Remove the stopper plate (1) on the backside of the Lock As .

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Illustration 4	g02477119
(2) Key assembly

2. Replace the Key As (2) .

3. Reinstall the Lock As