349F and 352F Excavators Hydraulic System Engine Performance - Test

Engine Performance - Test - Engine Speed

349F and 352F Excavators Hydraulic System [UENR2955]

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BASIC ENGINE

349F and 352F Excavators Hydraulic System Engine Performance - Test - Engine Speed

1.1. Specification

2.1. Introduction

3.1. Required Tools

4.1. Machine Preparation

5.1. Test Procedure

6.2. Travel Procedure

Specification

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Table 1
"Engine Performance - Test (Engine Speed)"
Conditions				Specifications (HP Mode)
Engine	"AEC" Switch Position	"Engine Speed Dial" Position	Time (sec)	New	Service Limit	Actual
No load	OFF	10	0 to 5	1800 ± 50 rpm	1800 + 50 - 200 rpm
	OFF	10	> 5	1700 ± 50 rpm	1700 + 50 - 200 rpm
	ON	10	> 5	1060 ± 50 rpm	1060 ± 100 rpm
	OFF	1	> 5	980 ± 50 rpm	980 ± 100 rpm
	One touch low idle		> 0	1060 ± 50 rpm	1060 ± 100 rpm
Load⁽¹⁾	OFF	10	> 3 to 5	1800 ± 50 rpm	≥1600 rpm
Travel⁽²⁾	OFF	10	0 to 5	1800 ± 50 rpm	≥ 1600 rpm
Travel⁽³⁾	OFF	10	> 10	1800 ± 50 rpm	≥ 1600 rpm

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⁽¹⁾	Two pump main relief (Boom UP).
⁽²⁾	One track blocked
⁽³⁾	Both tracks blocked

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Table 2
"Engine Performance - Test (Engine Speed)"
Conditions				Specifications (Standard Mode)
Engine	"AEC" Switch Position	"Engine Speed Dial" Position	Time (sec)	New	Service Limit	Actual
No load	OFF	10	0 to 5	1600 ± 50 rpm	1600 + 50 - 200 rpm
	OFF	10	> 5	1500 ± 50 rpm	1500 + 50 - 200 rpm
	ON	10	> 5	1060 ± 50 rpm	1060 ± 100 rpm
	OFF	1	> 5	980 ± 50 rpm	980 ± 100 rpm
	One touch low idle		> 0	1060 ± 50 rpm	1060 ± 100 rpm
Load⁽¹⁾	OFF	10	> 3 to 5	1600 ± 50 rpm	≥1400 rpm
Travel⁽²⁾	OFF	10	0 to 5	1600 ± 50 rpm	≥ 1400 rpm
Travel⁽³⁾	OFF	10	> 10	1600 ± 50 rpm	≥ 1400 rpm

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⁽¹⁾	Two pump main relief (Boom UP).
⁽²⁾	One track blocked
⁽³⁾	Both tracks blocked

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Table 3
Corresponding Engine RPM and Torque Output for Each Dial Position (No Load Condition)
Engine Speed Dial Position	High Hydraulic Power Mode		Standard Mode		ECO Mode
Engine Speed Dial Position	Engine RPM	Torque Output (%)	Engine RPM	Torque Output (%)	Engine RPM	Torque Output (%)
1	980	20.0	980	20.0	980	20.0
2	1060	35.0	1060	35.0	1060	35.0
3	1130	48.0	1130	48.0	1130	48.0
4	1230	63.0	1230	63.0	1230	63.0
5	1370	77.0	1300	77.0	1300	70.0
6	1470	88.0	1330	88.0	1330	78.0
7	1570	94.0	1360	95.0	1360	85.0
8	1650	97.0	1400	100.0	1400	90.0
9	1730	99.0	1500	100.0	1500	90.0
10	1800	100.0	1600	100.0	1600	90.0

Note: A New specification is the performance that can be expected for a new machine. Performance beyond the Service Limit is an indication of these problems: improper maintenance or adjustment, component wear, and failure.

Introduction

The following test is used to measure engine speed at the flywheel housing.

Required Tools

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Illustration 1	g02535237
Tooling (C)

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Illustration 2	g03261789
Tooling (D)

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Table 4
Tooling	Item	QTY	Part Number	Description
C			348-5430	Multi-Tool Gp
	C1	1	285-0908	Multi-Tool
	C2	1	6V-2198	Cable As
	C3	1	9U-5140	Photo Pickup
	C4	1	6V-3137	Base
	C5	1	1U-6605	Reflective Tape
	C6	1	6V-3138	Extension
D		2	418-3612	Track Block

Reference: Refer to Tool Operating Manual, NEHS1087 for operating instructions for the 348-5430 Multi-Tool Gp.

Note: Use Software License Card, NETG5049 with part number 348-5430 Multi-Tool Gp.

Machine Preparation

Position the machine on level ground.
Stop the engine.
Install 348-5430 Multi-Tool Gp on the engine.
Place track block (D) in the left travel sprocket to block left forward travel. Place track block (D) in the right travel sprocket to block right forward travel.

Test Procedure

Start the engine.
Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
Read the engine speed display (rpm) on the multi-tool. Refer to Table 1 and Table 2 for the specifications for engine speed at the desired engine operation.

Travel Procedure

Use the following procedure to check the desired engine speed for travel operation.

Start the engine.
Place the hydraulic activation control lever in the UNLOCK position.
Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
Place the machine controls at the following settings: engine speed dial 10 and AEC switch OFF.
Place the travel speed control switch in HIGH position.
Move either travel lever to the full forward travel position and read the engine speed display (rpm) on the multi-tool. Refer to Table 1 and Table 2 for the specifications for engine speed.
Return the travel lever to the NEUTRAL position.
Move both travel levers to the full forward travel position and hold for 10 seconds. Read the engine speed display (rpm) on the multi-tool. Refer to Table 1 and Table 2 for the specifications for engine speed.
Return the travel levers to the NEUTRAL position.