302.5C Excavator TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565} Caterpillar

302.5C Excavator TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565}

Usage:

Mini Hydraulic Excavator:: 302.5C (S/N: GBB1-UP)

Introduction

Inspections are the most basic form of condition monitoring. Inspections are easy to do and surprisingly effective at helping you spot equipment health issues. Proactive monitoring and analysis of equipment information will allow Dealers to intervene effectively before problems occur.

Note: Before adjusting product settings to comply with listed baseline TA2 values, consult SIS for the latest specification values.

Note: Specification values are based on the following machine settings unless stated otherwise

Engine Speed High Idle

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Electrical System

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Table 1
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Inspect Battery Cables	Cables between the battery, the starter, and the engine ground must be the correct size. Wires and cables must be free of corrosion. Wires and cables must have cable support clamps in order to prevent stress on battery connections (terminals).
	Battery Test ⁽²⁾	12.4 VDC or more
	Charging System Test ⁽³⁾	12 VDC to 50 VDC
	Electric Starting System Test ⁽³⁾

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	Refer to Special Instruction, SEHS7633, "Battery Test Procedure".
^( 3 )	Refer to General Service Manual, RENR5578, "Electrical System".

Engine

Cooling System

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Table 2
Description	Specification	Comments
Radiator Pressure Relief (Radiator Cap) ⁽²⁾	-
Freezing Point of Engine Coolant	-	Use 245-5829 Coolant/Battery Tester Gp .
Conditioner Test of Engine Coolant	-	Use 8T-5296 Coolant Conditioner Test Kit .
Belt Tension	-
Difference between the Upper Radiator Tank Temperature and Lower Radiator Tank Temperature	-
Jacket Water Inlet Temperature from Cooling System	-

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	Test for the pressure that is listed on the cap.

Basic Engine

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Table 3
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Engine Performance - Test (Engine Speed)
	No Load Low Idle	1320 ± 25 rpm
	One Touch No Load Low Idle	1320 ± 25 rpm
	No Load High Idle	2460 ± 30 rpm
	Engine Speed Minimum with Load	2200 rpm

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^( 1 )

N = Normal, M = Monitor, A = Action

Air Inlet and Exhaust System

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Table 4
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Inlet Manifold Pressure - Test
	Cylinder # 1 Exhaust Temperature ⁽²⁾
	Cylinder # 2 Exhaust Temperature ⁽²⁾
	Cylinder # 3 Exhaust Temperature ⁽²⁾
	Cylinder # 4 Exhaust Temperature ⁽²⁾
	Cylinder # 5 Exhaust Temperature ⁽²⁾
	Cylinder # 6 Exhaust Temperature ⁽²⁾
	Cylinder # 7 Exhaust Temperature ⁽²⁾
	Cylinder # 8 Exhaust Temperature ⁽²⁾

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	Compare the exhaust temperature variance at each exhaust port.

Performance Checks

ReferenceRefer to Testing & Adjusting, RENR9145, "Performance Tests" for more detail on the following test.

Operational Checks

Travel on Level Ground - Test

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Table 5
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Travel Time for 30 m (98.4 ft) (time in seconds) ⁽²⁾
	High Forward	17.5 ± 2.5 sec
	High Reverse	17.5 ± 2.5 sec
	Low Forward	26.0 ± 1.5 sec
	Low Reverse	26.0 ± 1.5 sec
	Travel Deviation - Check
	High Forward	1500 mm (59 inch) or less
	High Reverse	1500 mm (59 inch) or less
	Low Forward	1500 mm (59 inch) or less
	Low Reverse	1500 mm (59 inch) or less

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	First 10 m (32.8 ft) is preliminary. Measure travel time for remaining 20 m (65.6 ft).

Travel on Level Ground - Test (Optional Test)

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Table 6
Time for Three Revolutions (time in seconds)
Status ⁽¹⁾	Description	Specification	Actual		Comments
Status ⁽¹⁾	Description	Specification	Right	Left	Comments
	High Forward ⁽²⁾	9.7 ± 1.5 sec
	High Reverse ⁽²⁾	9.7 ± 1.5 sec
	Low Forward ⁽³⁾	15.7 ± 1.5 sec
	Low Reverse ⁽³⁾	15.7 ± 1.5 sec

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	Differential of less than 0.08 seconds between Right and Left
^( 3 )	Differential of less than 0.14 seconds between Right and Left

Machine Drift on a Slope - Check

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Table 7
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Machine Drift (mm (inch)) ⁽²⁾	30 mm (1.2 inch)

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	After 3 minutes

Swing Speed and Overswing on Level Ground - Check

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Table 8
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Swing Time (three revolutions) (seconds)
	Right Swing ⁽²⁾	2.0 or less
	Left Swing ⁽²⁾	2.0 or less
	Continuous swing right	18.0 to 22 or less
	Continuous swing left	18.0 to 22 or less
	Overswing ⁽³⁾ (mm (inch))
	Right Swing	190 mm (7.5 inch) or less
	Left Swing	190 mm (7.5 inch) or less

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	90 degree swing operation
^( 3 )	Loaded bucket weight 105 kg (231.5 lb)

Swing Speed and Swing Drift on a Slope - Check

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Table 9
Description	Specification	Comments
Swing Speed on a Slope (90 degree swing) (minutes) ⁽²⁾		Position the implements at maximum reach and close the bucket. Engine speed is LOW IDLE
Right Swing	3 or less
Left Swing	3 or less
Swing Drift (mm (inch))
Right Swing	120 mm (4.7 inch)
Left Swing	120 mm (4.7 inch)

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	Loaded bucket weight 105 kg (231.5 lb)

Cylinder Drift - Check

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Table 10
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Loaded Bucket (mm (inch)) (3 minutes) ⁽²⁾
	Boom Cylinder	10 mm (0.39 inch) or less
	Stick Cylinder	10 mm (0.39 inch) or less
	Bucket Cylinder	5 mm (0.2 inch) or less
	Blade Cylinder	3 mm (0.12 inch) or less

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	Weight of bucket load is 105 kg (231.5 lb)

Cylinder Speed - Check

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Table 11
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Boom Extension	2.5 ± 0.5 sec
	Boom Retraction	N/A
	Stick Extension	3.0 ± 0.5 sec
	Stick Retraction	3.0 ± 0.5 sec
	Bucket Extension	2.2 ± 0.4 sec
	Bucket Retraction	2.9 ± 0.3 sec
	Blade Extension	1.1 ± 0.2 sec
	Blade Retraction	1.1 ± 0.2 sec
	Boom Swing Extension	6.7 ± 1.4 sec
	Boom Swing Retraction	5.8 ± 1.4 sec

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^( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic System

ReferenceRefer to Testing & Adjusting, RENR9145, "Hydraulic Systems" for more detail on the following test.

Relief Valve (Pilot) - Test and Adjust

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Table 12
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Relief Valve (Pilot)	3400 ± 200 kPa (495 ± 30 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Accumulator (Pilot) - Test and Charge

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Table 13
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Pilot Accumulator	1035 kPa (150 psi)		Should stay above 1035 kPa (150 psi) within 1 minute.

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^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Main) - Test and Adjust

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Table 14
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Main Relief Valve Pressure at Pressure Tap (P1)	21700 ± 500 kPa (3147 ± 73 psi)
	Main Relief Valve Pressure at Pressure Tap (P2)	21700 ± 500 kPa (3147 ± 73 psi)
	Main Relief Valve Pressure at Pressure Tap (P3)	18050 ± 450 kPa (2618 ± 65 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Line) - Test

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Table 15
Relief Valve (Line) - Test and Adjust
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Boom Head End	25250 ± 250 kPa (3662 ± 36 psi)
	Boom Rod End
	Stick Head End
	Stick Rod End
	Bucket Head End

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^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Swing) - Test

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Table 16
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Swing Relief Valve (Left Swing)	18050 ± 450 kPa (2620 ± 65 psi)
	Swing Relief Valve (Right Swing)	18050 ± 450 kPa (2620 ± 65 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

S.O.S

ReferenceRefer to Operation and Maintenance Manual, SEBU8336, "Maintenance Interval Schedule" for more detail on the following S.O.S.

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Table 17
Status ⁽¹⁾	Description	Obtain	Comments
	Engine Oil Sample
	Engine Coolant Sample
	Hydraulic Oil Sample
	Right Final Drive Oil Sample
	Left Final Drive Oil Sample
	Swing Drive Oil Sample