Valve Plates for Some Hydraulic Motors May Have Poor Surface Finishes{5058} Caterpillar

Asphalt Paver:

AP655D (S/N: GNN1-UP)

Backhoe Loader:

434F (S/N: FLY1-UP)

444F (S/N: FBN1-UP)

Marine Engine:

C32 MARINE (S/N: RXB1-UP)

Excavator:

324D (S/N: MND1-UP; T2D1-UP; TRH1-UP; BTK1-UP; GPK1-UP; JGK1-UP; JAT1-UP; PYT1-UP)

324E (S/N: KTE1-UP; TLF1-UP; LDG1-UP; PNW1-UP; JCZ1-UP)

325D (S/N: NAC1-UP; C4H1-UP; ERK1-UP; RJK1-UP; LAL1-UP; MCL1-UP; GBR1-UP)

326D (S/N: PJM1-UP)

326D2 (S/N: REC1-UP; MGW1-UP; NBX1-UP; KGY1-UP)

326F (S/N: TPG1-UP; HCJ1-UP; SGK1-UP; XFK1-UP; WGL1-UP; TMR1-UP)

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

329D (S/N: MNB1-UP; XDB1-UP; BFC1-UP; BBF1-UP; CZF1-UP; DJF1-UP; JHJ1-UP; RSK1-UP; WDK1-UP; TZL1-UP; EBM1-UP; TPM1-UP; BYS1-UP; WLT1-UP; LFW1-UP; YFW1-UP; SCY1-UP; TAY1-UP; DTZ1-UP)

329D2 (S/N: RGA1-UP; TMJ1-UP; WDT1-UP; THW1-UP)

329E (S/N: RLD1-UP; ZCD1-UP; WJK1-UP; TST1-UP; PLW1-UP; RDX1-UP; PTY1-UP)

329F (S/N: WBA1-UP; YHA1-UP; GKK1-UP; ERL1-UP; LBN1-UP; RCN1-UP)

330D (S/N: PFC1-UP; R2D1-UP; NEF1-UP; LCJ1-UP; THJ1-UP; C5K1-UP; E4K1-UP; L2K1-UP; RDK1-UP; PEL1-UP; JJM1-UP; LEM1-UP; LRM1-UP; ERN1-UP; JLP1-UP; T2Y1-UP)

335F (S/N: KNE1-UP; JJR1-UP)

336D (S/N: PTB1-UP; SKE1-UP; JBF1-UP; J2F1-UP; PRF1-UP; LMG1-UP; MYG1-UP; KDJ1-UP; WRK1-UP; W3K1-UP; MPL1-UP; ZML1-UP; PPN1-UP; MYP1-UP; JER1-UP; JWR1-UP; DTS1-UP; MDS1-UP; NLS1-UP; JBT1-UP; KKT1-UP; M4T1-UP; WET1-UP; PGW1-UP; EMX1-UP)

336D2 (S/N: WBC1-UP; WDC1-UP; YCF1-UP; XBH1-UP; FAR1-UP; EFT1-UP; ZCT1-UP; TLY1-UP)

336E (S/N: JEA1-UP; RZA1-UP; KED1-UP; YCE1-UP; TEG1-UP; BMH1-UP; FJH1-UP; GTJ1-UP; JRJ1-UP; SSL1-UP; YEP1-UP; CMR1-UP; HDW1-UP; BZY1-UP; GNY1-UP; TMZ1-UP)

336F (S/N: TZA1-UP; YFD1-UP; KGH1-UP; NAJ1-UP; LCL1-UP; NBL1-UP; PFL1-UP; SSN1-UP; LTP1-UP; KFT1-UP; DSW1-UP; MTW1-UP; WTZ1-UP)

340D (S/N: JTN1-UP)

340D2 (S/N: HHK1-UP)

345C (S/N: FPC1-UP; SPC1-UP; GCL1-UP; SCN1-UP)

345D (S/N: DPA1-UP; BYC1-UP; HLC1-UP; RGD1-UP; RAE1-UP; YEE1-UP; NEG1-UP; RGG1-UP; EEH1-UP; KFH1-UP; RAJ1-UP; MLK1-UP; NLM1-UP; JKN1-UP; FES1-UP; PBT1-UP; BYW1-UP; LKY1-UP)

349D (S/N: JGB1-UP; WTD1-UP; GKF1-UP; NNF1-UP; PZG1-UP; KLH1-UP; RBJ1-UP; MEN1-UP; KHS1-UP)

349E (S/N: FJB1-UP; ETC1-UP; DGE1-UP; SPG1-UP; TFG1-UP; RGH1-UP; FEJ1-UP; KCN1-UP; MZW1-UP; KFX1-UP; MPZ1-UP; WHZ1-UP)

349F (S/N: KEA1-UP; HLB1-UP; HPD1-UP; TEW1-UP; BZ21-UP)

352F (S/N: WNA1-UP; YEG1-UP; A9J1-UP; KBP1-UP)

568 (S/N: BRB1-UP; YJX1-UP)

M330D (S/N: KRE1-UP; MBR1-UP)

UNDERCARRIAGE (S/N: L5J1-UP)

Forest Machine:

324D FM (S/N: JLS1-UP)

Track Feller Buncher:

1090 Series II (S/N: BZJ1-UP)

1190 Series II (S/N: BZK1-UP)

1190T Series II (S/N: BZL1-UP)

1290T Series II (S/N: BZM1-UP)

1390 (S/N: B3F1-UP)

2390 (S/N: P3H1-UP)

2491 (S/N: P5J1-UP)

511 (S/N: 5111-UP)

511B (S/N: F7A1-UP)

521 (S/N: 5211-UP)

521B (S/N: F7B1-UP)

522 (S/N: 5221-UP)

522B (S/N: F7C1-UP)

532 (S/N: 5321-UP)

541 Series 2 (S/N: F7D1-UP)

541 (S/N: 5411-UP)

551 (S/N: 5511-UP)

552 Series 2 (S/N: F7G1-UP)

552 (S/N: 5521-UP)

TK1161 (S/N: TKD1-UP)

TK1162 (S/N: TKE1-UP)

TK711 (S/N: TKA1-UP; 1011-UP)

TK721 (S/N: TKB1-UP; 1021-UP)

TK722 (S/N: TKC1-UP; 1031-UP)

TK732 (S/N: 1041-UP)

TK741 (S/N: 2021-UP)

TK751 (S/N: 3011-UP)

TK752 (S/N: 3021-UP)

Material Handler:

M325D MH (S/N: KGG1-UP; KAY1-UP; GE81-UP)

Mobile Hydraulic Power Unit:

324D MHPU (S/N: M4A1-UP; KJR1-UP; LBW1-UP; F661-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: J8D1-UP; J9D1-UP; L5G1-UP; L5H1-UP)

329E MHPU (S/N: K2L1-UP; KNR1-UP)

330C MHPU (S/N: MSD1-UP; MSL1-UP)

330D MHPU (S/N: D3D1-UP; H3D1-UP; M3D1-UP; GMN1-UP)

336D MHPU (S/N: J6D1-UP; L5K1-UP; M3M1-UP; M3N1-UP; M2P1-UP; M3S1-UP; JRX1-UP; L5X1-UP; NBZ1-UP)

336E MHPU (S/N: PCE1-UP; RBS1-UP; DSZ1-UP; T3Z1-UP)

345C MHPU (S/N: L5B1-UP; M3E1-UP; M3F1-UP; NRF1-UP; B6N1-UP)

345D MHPU (S/N: P5D1-UP; L5R1-UP)

349D MHPU (S/N: DKN1-UP)

349E MHPU (S/N: JAE1-UP; S3P1-UP; MTS1-UP)

Telehandler:

TH220B (S/N: SLA1-UP)

TH336C (S/N: MJR1-UP)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

Reports have been made of surface pitting and porosity on the 204-2677 446-7240 173-3445 234-4543 Valve Plates for the hydraulic motors.

Illustration 1	g03614597
Front

Illustration 2	g03614636
Back (1) Contact area (2) Non-contact area

Illustration 3	g03614637

Illustration 4	g03614658

Solution

The surface pitting and porosity are acceptable as long as the porous surface is found on the non-contact area of all the plates