Wear on Swash Plate Support in Side By Side Pumps on Certain Excavators{5070} Caterpillar


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Wear on Swash Plate Support in Side By Side Pumps on Certain Excavators{5070} [TIBU7359]
HYDRAULIC SYSTEM
PUMP GP
Wear on Swash Plate Support in Side By Side Pumps on Certain Excavators{5070}
1.1. Introduction
2.1. Problem
3.1. Solution
Excavator:
330D (S/N: GBC1-UP; NBD1-UP; R2D1-UP; GGE1-UP; B6H1-UP; EAH1-UP; THJ1-UP; C5K1-UP; E4K1-UP; FFK1-UP; H3K1-UP; L2K1-UP; PEL1-UP; JJM1-UP; LEM1-UP; LRM1-UP; ERN1-UP; JLP1-UP; MWP1-UP; HAS1-UP; RAS1-UP; EDX1-UP; MEY1-UP; T2Y1-UP)
336D (S/N: PTB1-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; JWR1-UP; DTS1-UP; MDS1-UP; JBT1-UP; KKT1-UP; M4T1-UP; WET1-UP; PGW1-UP)
336D2 (S/N: WBC1-UP; WDC1-UP; YCF1-UP; XBH1-UP; FAR1-UP; EFT1-UP; ZCT1-UP; TLY1-UP)
336E (S/N: KED1-UP; YCE1-UP; TEG1-UP; FJH1-UP; GTJ1-UP; JRJ1-UP; YEP1-UP; CMR1-UP; BZY1-UP; TMZ1-UP)
340D (S/N: JTN1-UP)
340D2 (S/N: HHK1-UP)
345D (S/N: BYC1-UP; RGD1-UP; RAE1-UP; YEE1-UP; NEG1-UP; RGG1-UP; EEH1-UP; KFH1-UP; RAJ1-UP; MLK1-UP; NLM1-UP; JKN1-UP; PBT1-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)
Mobile Hydraulic Power Unit:
330D MHPU (S/N: D3D1-UP; H3D1-UP; M3D1-UP; GMN1-UP)
336D MHPU (S/N: J6D1-UP; M3M1-UP; M3N1-UP; JRX1-UP; L5X1-UP)
336E MHPU (S/N: RBS1-UP; DSZ1-UP; T3Z1-UP)
345C MHPU (S/N: M3E1-UP; M3F1-UP; NRF1-UP; B6N1-UP)
345D MHPU (S/N: P5D1-UP)
349D MHPU (S/N: DKN1-UP)
349E MHPU (S/N: JAE1-UP; S3P1-UP)

Introduction

The problem identified below is not a defect. Refer to the information below.

Problem

The swash plate support in a side by side pump, has a moly coating. The moly coating is used while breaking in the pump. Once the coating is gone, a brass surfaced is exposed. Both sides of the swash plate support are hydraulically balanced, however the pressure side coating always wears off first.




Illustration 1g03537057

Solution

The wear on the swash plate support is normal, it should not be considered a defect or failure.