424D and 432D Backhoe Loader TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565} Caterpillar

424D and 432D Backhoe Loader TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565}

Usage:

424D RXA

Backhoe Loader:: 424D (S/N: RXA1-UP); 432D (S/N: WEP1-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.

Creating an Electronic Copy

Use the following procedure to create an editable electronic copy from SIS Web.

Click format to print.

Save the document as an HTML format.

Open the document with Microsoft Word.

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	12.4 VDC or more		Refer to Special Instruction, SEHS7633, "Battery Test Procedure".
	Charging System Test	14 ± 1 VDC		Refer to Special Instruction, REHS0354, "Charging System - Test".
	Electric Starting System Test	6 to 8 V at −23° C (−10° F) to −7° C (19° F)		Refer to Testing and Adjusting, RENR2415, "Electrical Starting System - Test".
		7 to 9 V at −7° C (19° F) to 10° C (50° F)
		8 to 10 V at 10° C (50° F) to 27° C (80° F)

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^( 1 )

N = Normal, M = Monitor, A = Action

Engine

Cooling System

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Table 2
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Radiator Pressure Relief (Radiator Cap) ⁽²⁾
	Freezing Point of Engine Coolant
	Conditioner Test of Engine Coolant
	Belt Tension			Refer to Operation and Maintenance Manual.
	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.

Fuel System

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Table 3
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Fuel Pressure at LOW IDLE	25 kPa (3.63 psi)
	Maximum Pressure at HIGH IDLE	25 kPa (3.63 psi)

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N = Normal, M = Monitor, A = Action

Lubrication System

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Table 4
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Engine Oil Pressure at Low Idle	280 kPa (40 psi)
	Engine Oil Pressure at High Idle	-

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N = Normal, M = Monitor, A = Action

Basic Engine

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Table 5
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Engine Speed at Low Idle
	Engine Speed at High Idle
	Torque Converter Stall Test Engine RPM
	Torque Converter Stall Test Engine RPM
	Cylinder Cutout Test			Cat^® Electronic Technician (Cat ET) Service Tool
	Engine Crankcase Pressure (Blowby)

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^( 1 )

N = Normal, M = Monitor, A = Action

Air Inlet and Exhaust System

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Table 6
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Torque Converter Stall Test Boost Pressure
	Cylinder # 1 Exhaust Temperature ⁽²⁾
	Cylinder # 2 Exhaust Temperature ⁽²⁾
	Cylinder # 3 Exhaust Temperature ⁽²⁾
	Cylinder # 4 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

Refer to Testing & Adjusting, RENR7779, "Hydraulic and Steering System" for more detail on the following test.

Operational Checks

Drift Check for the Loader Cylinders, Backhoe Cylinders, Swing Cylinders, and Stabilizer Cylinders

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Table 7
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Loader Lift and Tilt Cylinders Drift Test	Minutes until maximum allowable drift of 6 mm (0.24 inch) at oil temperature of 38° to 48°C (100° to 119°F) is 5.0 mins
		Minutes until maximum allowable drift of 6 mm (0.24 inch) at oil temperature of 49° to 65°C (120° to 149°F) is 3.2 mins
		Minutes until maximum allowable drift of 6 mm (0.24 inch) at oil temperature of 66° to 81°C (150° to 178°F) is 1.7 mins
		Minutes until maximum allowable drift of 6 mm (0.24 inch) above oil temperature of above 81° C (178° F) is 1.1 mins

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^( 1 )

N = Normal, M = Monitor, A = Action

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Table 8
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Loader Lift Cylinder Drift Test	Minutes until maximum allowable drift of 12 mm (0.5 inch) at oil temperature of 38° to 48°C (100° to 119°F) is 5.0 mins
		Minutes until maximum allowable drift of 12 mm (0.5 inch) at oil temperature of 49° to 65°C (120° to 149°F) is 3.2 mins
		Minutes until maximum allowable drift of 12 mm (0.5 inch) at oil temperature of 66° to 81°C (150° to 178°F) is 1.7 mins
		Minutes until maximum allowable drift of 12 mm (0.5 inch) above oil temperature of above 81° C (178° F) is 1.1 mins

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^( 1 )

N = Normal, M = Monitor, A = Action

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Table 9
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Backhoe Boom, Bucket, and Stick Cylinders Drift Test	Minutes until maximum allowable drift of 10 mm (0.40 inch) at oil temperature of 38° to 48°C (100° to 119°F) is 5.0 mins
		Minutes until maximum allowable drift of 10 mm (0.40 inch) at oil temperature of 49° to 65°C (120° to 149°F) is 3.2 mins
		Minutes until maximum allowable drift of 10 mm (0.40 inch) at oil temperature of 66° to 81°C (150° to 178°F) is 1.7 mins
		Minutes until maximum allowable drift of 10 mm (0.40 inch) above oil temperature of above 81° C (178° F) is 1.1 mins

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^( 1 )

N = Normal, M = Monitor, A = Action

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Table 10
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Backhoe Swing Cylinders Drift Test	Minutes until maximum allowable drift of 10 mm (0.40 inch) at oil temperature of 38° to 48°C (100° to 119°F) is 5.0 mins
		Minutes until maximum allowable drift of 10 mm (0.40 inch) at oil temperature of 49° to 65°C (120° to 149°F) is 3.2 mins
		Minutes until maximum allowable drift of 10 mm (0.40 inch) at oil temperature of 66° to 81°C (150° to 178°F) is 1.7 mins
		Minutes until maximum allowable drift of 10 mm (0.40 inch) above oil temperature of above 81° C (178° F) is 1.1 mins

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^( 1 )

N = Normal, M = Monitor, A = Action

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Table 11
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Stabilizer Cylinders Drift Test	Minutes until maximum allowable drift of 1 mm (0.04 inch) at oil temperature of 38° to 48°C (100° to 119°F) is 5.0 mins
		Minutes until maximum allowable drift of 1 mm (0.04 inch) at oil temperature of 49° to 65°C (120° to 149°F) is 3.2 mins
		Minutes until maximum allowable drift of 1 mm (0.04 inch) at oil temperature of 66° to 81°C (150° to 178°F) is 1.7 mins
		Minutes until maximum allowable drift of 1 mm (0.04 inch) above oil temperature of above 81° C (178° F) is 1.1 mins

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^( 1 )

N = Normal, M = Monitor, A = Action

Cylinder Drift Check for the Loader, Cylinder Speed Drift for the Backhoe, and Cylinder Drift Check for the Stabilizers for 424D S/N:RXA1-UP

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Table 12
Description		Specification
Maximum Time for Loader Circuit on the Single Tilt Machine at HIGH IDLE and Oil Temperature of minimum 49° C (120° F) (Time in seconds)
	Bucket Dump	2.4
	Tilt Back Operation	2.7
	Opening the Clam Bucket	2.1
	Closing the Clam Bucket	2.1
	Bucket Raise in the Dumped Position	4.4
	Float in the Down Position and in the Dumped Position	3.0
Maximum Time for Backhoe Circuit at HIGH IDLE and Oil Temperature of minimum 49° C (120° F) (Time in seconds)
	Bucket Dump	2.1
	Bucket Curl Cylinder from Stop to Stop	3.1
	Stick In	4.0
	Stick Out	3.0
	Swing from Stop to Stop	3.0 to 7.2
	Swing from Stop to Snubber	2.8 to 3.7
	Extending the Extendable Stick	4.3
	Retracting the Extendable Stick	3.5
	Boom Lower	1.6 to 2.4
	Pause Time for the Boom	0.6
	Boom Raise from the Ground to the Snubber	2.5
	Boom Raise from the Ground to the Stop	3.5
	Stabilizer Up	3.4
	Stabilizer Down	2.4

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^( 1 )

N = Normal, M = Monitor, A = Action

Cylinder Drift Check for the Loader, Cylinder Speed Drift for the Backhoe, and Cylinder Drift Check for the Stabilizers for 432D S/N:WEP1-UP

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Table 13
Description		Specification
Maximum Time for Loader Circuit on the Single Tilt Machine at HIGH IDLE and Oil Temperature of minimum 49° C (120° F) (Time in seconds)
	Float in the Down Position and in the Dumped Position	3.1
Maximum Time for Loader Circuit on the Parallel Lift Machine at HIGH IDLE and Oil Temperature of minimum 49° C (120° F) (Time in seconds)
	Bucket Dump	3.6
	Tilt Back Operation	2.9
	Regenerative Dump	2.9
	Opening the Clam Bucket	2.1
	Closing the Clam Bucket	2.1
	Bucket Raise in the Level Position	6.2
	Float in the Down Position and in the Level Position	3.1
Maximum Time for Backhoe Circuit at HIGH IDLE and Oil Temperature of minimum 49° C (120° F) (Time in seconds)
	Bucket Dump	2.4
	Bucket Curl Cylinder from Stop to Stop	3.5
	Stick In	3.7
	Stick Out	3.2
	Swing from Stop to Stop	2.8 to 6.8
	Swing from Stop to Snubber	2.6 to 3.3
	Extending the Extendable Stick	4.6
	Retracting the Extendable Stick	4.0
	Boom Lower	1.8 to 2.9
	Boom Raise from the Ground to the Snubber	2.7
	Boom Raise from the Ground to the Stop	3.7
	Stabilizer Up	3.4
	Stabilizer Down	2.4

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^( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic and Steering System

Refer to Testing & Adjusting, RENR7779, "Hydraulic and Steering System" for more detail on the following test.

Hydraulic Pump - Test and Adjust

Low Pressure Standby Test

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Table 14
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Maximum system pressure at HIGH IDLE	2850 ± 750 kPa (415 ± 110 psi)

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N = Normal, M = Monitor, A = Action

Margin Pressure Test

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Table 15
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Margin pressure at HIGH IDLE	2200 ± 100 kPa (320 ± 15 psi)

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N = Normal, M = Monitor, A = Action

High Pressure Stall Test

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Table 16
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Pressure for STICK OUT Circuit at LOW IDLE	22800 ± 700 kPa (3300 ± 100 psi)
	Pressure for STICK IN Circuit at LOW IDLE
	Pressure for STICK EXTEND Circuit (if equipped) at LOW IDLE
	Pressure for STICK RETRACT Circuit (if equipped) at LOW IDLE
	Pressure for Auxiliary Circuit (if equipped) at LOW IDLE
	Pressure for SWING Circuit at LOW IDLE
	Pressure for Backhoe BUCKET DUMP Circuit at LOW IDLE
	Pressure for Backhoe BUCKET CLOSE Circuit at LOW IDLE
	Pressure for BOOM RAISE Circuit at LOW IDLE
	Pressure for BUCKET DUMP Circuit (parallel lift machines) at LOW IDLE	16200 ± 700 kPa (2350 ± 100 psi)
	Pressure for RACK BACK Circuit (parallel lift machines) at LOW IDLE	22800 ± 700 kPa (3300 ± 100 psi)
	Pressure for BUCKET DUMP and RACK BACK Circuit (single tilt machines) at LOW IDLE	22800 ± 700 kPa (3300 ± 100 psi)
	Pressure for LIFT Circuit at LOW IDLE	22800 ± 700 kPa (3300 ± 100 psi)
	Pressure for BOOM LOWER Circuit at LOW IDLE	15500 ± 700 kPa (2250 ± 100 psi) ⁽²⁾
	Pressure for BOOM LOWER Circuit at LOW IDLE	15200 ± 700 kPa (2200 ± 100 psi) ⁽³⁾

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	For 424D S/N:RXA1-UP.
^( 3 )	For 432D S/N:WEP1-UP.

Relief Valve (Line) - Test and Adjust for 424D S/N:RXA1-UP

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Table 17
Line Relief Valve Pressure Setting
Status ⁽¹⁾	Description		Specification	Actual	Comments
Status ⁽¹⁾	Cylinder	Circuit	Specification	Actual	Comments
	Auxiliary for the Loader	Head End for the Auxiliary Cylinder	24200 ± 350 kPa (3500 ± 50 psi)
	Loader Tilt Circuit for all other Single Tilt Machine	Rod End for the Dump Operation	24200 ± 350 kPa (3500 ± 50 psi)
	Loader Tilt Circuit for all other Single Tilt Machine	Head End for the Tilt Back Operation	24200 ± 350 kPa (3500 ± 50 psi)
	Backhoe Boom	Head End to LOWER	15500 ± 700 kPa (2250 ± 100 psi)
	Backhoe Boom	Rod End to RAISE	29000 ± 350 kPa (4200 ± 50 psi)
	Backhoe Swing	Rod End to Swing LEFT	22800 ± 350 kPa (3300 ± 50 psi)
	Backhoe Swing	Rod End to Swing RIGHT	22800 ± 350 kPa (3300 ± 50 psi)
	Backhoe Bucket	Head End of the Bucket Cylinder	27600 ± 350 kPa (4000 ± 50 psi)
	Backhoe Bucket	Rod End of the Bucket Cylinder	28300 ± 350 kPa (4100 ± 50 psi)
	Backhoe Stick	Head End for retracting the Stick IN	22800 ± 350 kPa (3300 ± 50 psi)
	Backhoe Stick	Rod End for extending Stick OUT	22800 ± 350 kPa (3300 ± 50 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Line) - Test and Adjust for 432D S/N:WEP1-UP

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Table 18
Line Relief Valve Pressure Setting
Status ⁽¹⁾	Description		Specification	Actual	Comments
Status ⁽¹⁾	Cylinder	Circuit	Specification	Actual	Comments
	Auxiliary for the Loader	Head End for the Auxiliary Cylinder	24200 ± 350 kPa (3500 ± 50 psi)
	Loader Tilt Circuit for all other Single Tilt Machine	Rod End for the Dump Operation	27600 ± 350 kPa (4000 ± 50 psi)
	Loader Tilt Circuit for all other Single Tilt Machine	Head End for the Tilt Back Operation	27600 ± 350 kPa (4000 ± 50 psi)
	Loader Tilt Circuit for Parallel Lift Machines	Rod End for the Tilt Back Operation	27900 ± 350 kPa (4045 ± 50 psi)
	Loader Tilt Circuit for Parallel Lift Machines	Head End for the Dump Operation	16200 ± 350 kPa (2350 ± 50 psi)
	Backhoe Boom	Head End to LOWER	15200 ± 350 kPa (2200 ± 50 psi)
	Backhoe Boom	Rod End to RAISE	29000 ± 350 kPa (4200 ± 50 psi)
	Backhoe Swing	Rod End to Swing LEFT	22800 ± 350 kPa (3300 ± 50 psi)
	Backhoe Swing	Rod End to Swing RIGHT	22800 ± 350 kPa (3300 ± 50 psi)
	Backhoe Bucket	Head End of the Bucket Cylinder	27600 ± 350 kPa (4000 ± 50 psi)
	Backhoe Bucket	Rod End of the Bucket Cylinder	28300 ± 350 kPa (4100 ± 50 psi)
	Backhoe Stick	Head End for retracting the Stick IN	26900 ± 350 kPa (3900 ± 50 psi)
	Backhoe Stick	Rod End for extending Stick OUT	24800 ± 350 kPa (3600 ± 50 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Pilot System Pressure - Test

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Table 19
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Pilot System Pressure at HIGH IDLE	3250 ± 350 kPa (470 ± 50 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Steering Priority) - Test and Adjust

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Table 20
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Relief Valve Pressure at HIGH IDLE	17250 ± 700 kPa (2500 ± 100 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Ride Control Accumulator - Test and Charge

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Table 21
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Ride Control Accumulator Pressure	1860 ± 34.5 kPa (270 ± 5.0 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

S.O.S

ReferenceRefer to Operation and Maintenance Manual, SEBU7821, "Maintenance Interval Schedule" for more detail on performing S.0.S samples.

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Table 22
Status ⁽¹⁾	Description	Obtain		Comments
	Engine Oil Sample
	Engine Coolant Sample (Level II)
	Hydraulic Oil Sample
	Transmission Oil Sample
	Front Right Final Drive Oil Sample
	Front Left Final Drive Oil Sample
	Rear Right Final Drive Oil Sample
	Rear Left Final Drive Oil Sample
	Front Axle/Diff Oil Sample
	Center Axle/Diff Oil Sample
	Rear Axle/Diff Oil Sample
	Transfer Case Oil Sample
	Brake Fluid Oil Sample
	Power Steering Oil Sample