621H OEM Wheel Tractor TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565} Caterpillar

621H OEM Wheel Tractor TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565}

Usage:

621H NYY

Wheel Tractor-Scraper:: 621H (S/N: NYY1-UP)

Introduction

Inspections are the most basic form of condition monitoring. They 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 effectively intervene 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	18 VDC to 32 VDC		Refer to Special Instruction, REHS0354, "Charging System Troubleshooting".
	Electric Starting System Test	12 to 16 V at −23° C (−10° F) to −7° C (19° F)		Refer to Testing and Adjusting, UENR0997, "Electric Starting System - Test".
		14 to 18 V at −7° C (19° F) to 10° C (50° F)
		16 to 24 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			Auto Adjust Belt Tensioner
	Difference between the Upper and Lower Radiator Tank Temperatures

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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	689 ± 228 kPa (100 ± 33 psi)

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^( 1 )

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	-
	Engine Oil Pressure at 1800 rpm	-

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^( 1 )

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	700 ± 10 rpm
	Engine Speed at High Idle	2100 ± 10 rpm
	Cylinder Cutout Test	-
	Engine Crankcase Blowby Pressure	-

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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
	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⁾	-

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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, KENR8874 for more detail on the following tests.

Brake Performance Checks

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Table 7
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Service Brake Test (Test from OMM)	1200 rpm
	Parking Brake Test (Test from OMM)	900 rpm

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^( 1 )

N = Normal, M = Monitor, A = Action

Secondary Steering Performance Checks

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Table 8
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Three Second Powerup Test
	Secondary Steering Response Test - Steer Right (Stop to Stop)
	Secondary Steering Response Test - Steer Left (Stop to Stop)

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^( 1 )

N = Normal, M = Monitor, A = Action

Steering Performance Checks

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Table 9
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Steering Wheel Slip Test	25 ± 5°
	Steering Time Stop to Stop	5.6 seconds to 6.5 seconds

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^( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic and Steering System

Steering System

Steering Relief Valve Pressure

ReferenceRefer to Testing & Adjusting, KENR8874, "Relief Valve (Steering) - Test and Adjust" for more detail on the following tests.

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Table 10
Status ⁽¹⁾	Description	Specification	Actual	Comments
	LH Turn Differential Pressure	15500 ± 520 kPa (2250 ± 75 psi)
	RH Turn Differential Pressure	15500 ± 520 kPa (2250 ± 75 psi)
	Difference Between LH and RH	> 350 kPa (50 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Steering Standby Pressure

ReferenceRefer to Testing & Adjusting, KENR8874, "Steering System Standby Pressure - Test and Adjust" for more detail on the following tests.

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Table 11
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Low Pressure Standby Differential Pressure	827 kPa (120 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Secondary Steering Pressure

ReferenceRefer to Testing & Adjusting, KENR8874, "Secondary Steering System Pressure - Test" for more detail on the following tests.

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Table 12
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Steering Pressure Against Stops	15500 ± 520 kPa (2250 ± 75 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Implement Hydraulic System

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Table 13
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Main Relief Valve - Test
	Pump Control Valve (Cushion Hitch) - Test	16070 ± 550 kPa (2330 ± 80psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic Fan and Brake System

ReferenceRefer to Testing & Adjusting, KENR8876 for more details on the following tests.

Hydraulic Fan Speed

ReferenceRefer to Testing & Adjusting, KENR8876, "Hydraulic Fan Speed - Test" for more detail on the following test.

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Table 14
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Minimum Fan Speed @ High Idle	650 ± 50 RPM
	Maximum Fan Speed @ High Idle	1635 ± 50 RPM

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^( 1 )

N = Normal, M = Monitor, A = Action

Service Brake Pressure

ReferenceRefer to Testing & Adjusting, KENR8876, "Service Brake System Pressure - Test" for more detail on the following test.

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Table 15
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Front Wheels with brake pedal FULLY depressed	5862 + 517 - 345 kPa (850 + 75 - 50 psi)
	Maximum front brake pressure within 5 seconds of releasing pedal	140 kPa (20 psi)
	Rear Wheels with brake pedal FULLY depressed	5690 + 517 - 345 kPa (825 + 75 - 50 psi)
	Maximum rear brake pressure within 5 seconds of releasing pedal	140 kPa (20 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Parking Brake Pressure

ReferenceRefer to Testing & Adjusting, KENR8876, "Parking Brake - Test and Adjust" for more detail on the following test.

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Table 16
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Engine off with parking brake switch ON	500 kPa (73 psi)
	Low idle with parking brake switch ON	500 kPa (73 psi)
	Low idle with parking brake switch OFF	4000 kPa (580 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Power Train System

ReferenceRefer to Testing & Adjusting, KENR8878 for more details on the following tests.

Relief Valve Pressure

ReferenceRefer to Testing & Adjusting, KENR8878, "Relief Valve (Main) - Test and Adjust" for more detail on the following test.

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Table 17
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Low Idle	2688 kPa (390 psi)
	High Idle	2895 kPa (420 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Transmission Lube Oil Test

ReferenceRefer to Testing & Adjusting, KENR8878, "Transmission Lubrication Oil Pressure - Test" for more detail on the following test.

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Table 18
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Low Idle	5 kPa (1 psi) to 62 kPa (9 psi)
	High Idle	100 kPa (15 psi) to 275 kPa (40 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Transmission Clutch Pressure Test

ReferenceRefer to Testing & Adjusting, KENR8878, "Transmission Clutch Pressure - Test" for more detail on the following test.

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Table 19
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Clutch 1	2965 ± 69 kPa (430 ± 10 psi)
	Clutch 2	2068 ± 69 kPa (300 ± 10 psi)
	Clutch 3	2068 ± 69 kPa (300 ± 10 psi)
	Clutch 4	2068 ± 69 kPa (300 ± 10 psi)
	Clutch 5	2965 ± 69 kPa (430 ± 10 psi)
	Clutch 6	2965 ± 69 kPa (430 ± 10 psi)
	Clutch 7	2965 ± 69 kPa (430 ± 10 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Torque Converter Inlet Oil Pressure

ReferenceRefer to Testing & Adjusting, KENR8878, "Torque Converter Inlet Oil Pressure - Test" for more detail on the following test.

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Table 20
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Inlet Oil Pressure	930 ± 100 kPa (135 ± 15 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Torque Converter Outlet Pressure

ReferenceRefer to Testing & Adjusting, KENR8878, "Torque Converter Outlet Relief Valve Pressure - Test and Adjust" for more detail on the following test.

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Table 21
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Outlet Relief Valve Pressure	275 kPa (40 psi) to 480 kPa (70 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

S.O.S.

ReferenceRefer to Operation and Maintenance Manual, SEBU8483, "Maintenance Section" for more detail and port locations on the following S.O.S. service.

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Table 22
Status ⁽¹⁾	Description	Obtain	Comments
	Engine Oil Sample	Every 250 hours
	Hydraulic System Oil Sample	Every 250 hours
	Transmission Oil Sample	Every 250 hours
	Brake Cooling Oil Sample	Every 500 hours
	Differential and Final Drive Oil Sample	Every 500 hours
	Engine Coolant Sample (Level I)	Every 500 hours
	Engine Coolant Sample (Level II)	Every 2000 hours