Engine Oil Hose Failures on Certain Excavators Equipped with C13 Engines{1308} Caterpillar

Excavator:

345B Series II (S/N: ALB1-UP; CCC1-UP; ALD1-UP; AMD1-UP; FEE1-UP; AKJ1-UP; AMJ1-UP; CDJ1-UP; AMN1-UP; AYR1-UP; AGS1-UP; DCW1-UP; AKX1-UP)

345B (S/N: BFG1-UP; CFM1-UP; 4SS1-UP; 5WS1-UP; 6XS1-UP; 7KS1-UP; 9GS1-UP; 2NW1-UP; 2SW1-UP; 6MW1-UP; 8KW1-UP; 8RW1-UP; 9CW1-UP)

345C (S/N: TBA1-UP; FPC1-UP; MDC1-UP; SPC1-UP; ESD1-UP; WDE1-UP; TDG1-UP; GBH1-UP; GPH1-UP; TAJ1-UP; GCL1-UP; S5M1-UP; RFN1-UP; SCN1-UP; DHP1-UP; JAR1-UP; ELS1-UP; LYS1-UP; PJW1-UP; BWY1-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; L5R1-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)

Mobile Hydraulic Power Unit:

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

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

349D MHPU (S/N: DKN1-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

The existing oil hoses are failing due to both heat exposure and abrasion.

Solution

The new 423-4640 Hose As and 423-4641 Hose As are a direct replacement for the existing 148-2104 Hose As and 144-0119 Hose As . Refer to Table 1 for a list of parts needed to install the new hose assemblies.

The removal procedure for existing hoses and the installation procedure for the new installing the new hose assemblies is shown below.

Note: If either of the 148-2104 Hose As or 144-0119 Hose As fail, replacing all existing part numbers with the new parts is required.

Removal and Installation Procedure

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Illustration 1	g03340064
(1) Seal O-Ring (2) Clips (Retain the Bolts and Washers for reassembly) (3) Hose Assembly (4) Seal O-Ring (5) Adapter

1. Remove the hose assemblies and mounting hardware indicated in Illustration 1.

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Illustration 2	g03340934
(6) 228-7093 O-Ring Seal (7) 423-4641 Hose As (8) 423-4640 Hose As (9) Two 8T-7088 Grommets (10) Two 204-2281 Cable Straps (11) Two 6V-1889 Clips (12) Two 8T-4121 Hard Washers (13) 8T-4136 Bolt (14) 8T-4133 Nut (15) 319-6220 Elbow As

2. Connect hoses (7) and (8) to the remote oil filter base.

   Note: New O-ring (6) must be used connecting hose (8) .

3. Route hoses (7) and (8) and secure the hoses to the bracket where shown using clips (11), washers (12), bolts (13), and nut (14) .

   Note: Bolts (113) and washers (12) were retained from the removal of the old parts.

4. Install connector (15) into the oil line adapter. Connect the hoses to the connectors as shown.

5. Install grommets (9) and cable straps (10) as shown in Illustration 2.