623K Wheel Tractor-Scraper TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565} Caterpillar

Wheel Tractor-Scraper:

623K (S/N: WTM1-UP)

Introduction

Inspections are the most basic form of condition monitoring. The 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 before problems occur.

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

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Electrical System

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, UENR3402, "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)

( 1 )

N = Normal, M = Monitor, A = Action

Engine

Cooling System

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

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

Fuel System

ReferenceRefer to Testing & Adjusting, UENR0946, "Fuel System Pressure - Test" for more detail on the following tests.

Table 3

Status (1)	Description	Specification	Actual	Comments
	Fuel Pressure	724 ± 207 kPa (105 ± 30 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Lubrication System

ReferenceRefer to Testing & Adjusting, UENR0946, "Engine Oil Pressure - Test" for more detail on the following tests.

Table 4

Status (1)	Description	Specification	Actual	Comments
	Engine Oil Pressure at Low Idle	62.05284 kPa (9 psi) to 131 kPa (19 psi)
	Engine Oil Pressure at Full Load Speed	179 kPa (26 psi) to 386 kPa ( 56 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Basic Engine

Table 5

Status (1)	Description	Specification	Actual	Comments
	Engine Speed at Low Idle	700 ± 100 rpm
	Engine Speed at High Idle	2100 ± 100 rpm
	Torque Check Speed	1300 ± 10 rpm
	Boost Pressure At Torque Check Speed	168 ± 25 kPa ( 49.6 ± 7.5 inch mercury)
	Cylinder Cutout Test	-

( 1 )

N = Normal, M = Monitor, A = Action

Air Inlet and Exhaust System

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)	-

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

Performance Checks

ReferenceRefer to Testing & Adjusting, UENR3800 for more detail on the following tests.

Brake Performance Checks

ReferenceRefer to Operation and Maintenance Manual, SEBU9134, "Braking System - Test" for more detail on the following tests.

Table 7

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

( 1 )

N = Normal, M = Monitor, A = Action

Secondary Steering Performance Checks

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)	-

( 1 )

N = Normal, M = Monitor, A = Action

Steering Performance Checks

Table 9

Status (1)	Description	Specification	Actual	Comments
	Steering Wheel Slip Test	25 ± 5°
	Steering Time Stop to Stop Full RIGHT to Full LEFT	5.0 ± 0.5 seconds
	Steering Time Stop to Stop Full LEFT To Full RIGHT	5.0 ± 0.5 seconds

( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic Performance Checks

Table 10

Status (1)	Description	Specification	Actual	Comments
	Bowl Raise (Ground Level to Maximum Height)	3.0 ± .5 seconds
	Bowl Lower (Maximum Height to Ground Level)	3.0 ± .5 seconds
	Elevator Speed - First Speed Forward	4.65 ± .5 seconds
	Elevator Speed - First Speed Reverse	4.65 ± .5 seconds
	Ejector Travel (Full Foreword to Rear Position	9.7 ± .5 seconds
	Ejector Travel (Full Rear to Foreword Position	6.45 ± .5 seconds

( 1 )

N = Normal, M = Monitor, A = Action

Cylinder Drift Tests

ReferenceRefer to Testing & Adjusting, UENR3800, "Hydraulic Cylinder Drift - Check" for more detail on the following tests.

Table 11

Status (1)	Description	Specification	Actual	Comments
	Oil Temperature	60° C (140° F)
	Bowl Cylinders	Less than 4.5 mm (0.18 inch)

( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic and Steering System

Steering System

Steering Relief Valve Pressure

ReferenceRefer to Testing & Adjusting, UENR3800, "Relief Valve (Steering) - Test and Adjust" for more detail on the following tests.

Table 12

Status (1)	Description	Specification	Actual	Comments
	LH Turn Differential Pressure	17800 ± 800 kPa (2582 ± 116 psi)
	RH Turn Differential Pressure	17800 ± 800 kPa (2582 ± 116 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Steering Standby Pressure

ReferenceRefer to Testing & Adjusting, UENR3800, "Steering System Pressure - Test and Adjust" for more detail on the following tests.

Table 13

Status (1)	Description	Specification	Actual	Comments
	Low Pressure Standby Differential Pressure	827 kPa (120 psi)
	High Idle Steering Pump High Pressure Cutoff	19000 ± 350 kPa (2755 ± 50 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Secondary Steering Pressure

ReferenceRefer to Testing & Adjusting, UENR3800, "Secondary Steering System Pressure - Test" for more detail on the following tests.

Table 14

Status (1)	Description	Specification	Actual	Comments
	Low idle and test switch ON	4500 ± 300 kPa (653 ± 44 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Implement Hydraulic System

ReferenceRefer to Testing & Adjusting, UENR3800, "Pump Control Valve (Cushion-Hitch) - Test and Adjust" for more detail on the following tests.

Pump Control Valve

Table 15

Status (1)	Description	Specification	Actual	Comments
	Main Relief Valve - Test
	Pump Control Valve (Cushion Hitch) - Test (2)	16000 ± 520 kPa (2320 ± 75psi)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	The cushion-hitch control switch must be in the OFF position, and the engine speed set at HIGH IDLE

Ejector Relief Valve

ReferenceRefer to Testing & Adjusting, UENR3800, "Relief Valve (Ejector) - Test and Adjust" for more detail on the following tests.

Table 16

Status (1)	Description	Specification	Actual	Comments
	High Idle Ejector Forward Relief	25800 ± 690 kPa (3742 ± 100 psi)
	High Idle Ejector Return	21300 ± 2000 kPa (3090 ± 290 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Bowl Relief Valve

ReferenceRefer to Testing & Adjusting, UENR3800, "Relief Valve (Scraper Bowl) - Test and Adjust" for more detail on the following tests.

Table 17

Status (1)	Description	Specification	Actual	Comments
	Bowl Raise Relief (2)	25800 ± 690 kPa (3742 ± 100 psi)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Engine Set at HIGH IDLE

Pressure Reducing Valve

ReferenceRefer to Testing & Adjusting, UENR3800, "Pressure Reducing Valve (Pilot Oil) - Test and Adjust" for more detail on the following tests.

Table 18

Status (1)	Description	Specification	Actual	Comments
	Bowl RAISE (2)	3450 ± 345 kPa (500 ± 50 psi)
	Bowl LOWER (2)	3450 ± 345 kPa (500 ± 50 psi)
	Ejector FORWARD (2)	3450 ± 345 kPa (500 ± 50 psi)
	Ejector REVERSE (2)	3450 ± 345 kPa (500 ± 50 psi)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Engine Set at LOW IDLE

Hydraulic Fan and Brake System

Hydraulic Fan Speed

ReferenceRefer to Testing & Adjusting, UENR3800, "Hydraulic Fan Speed - Test" for more detail on the following test.

Table 19

Status (1)	Description	Specification	Actual	Comments
	Minimum Fan Speed @ High Idle	650 ± 50 RPM
	Maximum Fan Speed @ High Idle	1410 RPM

( 1 )

N = Normal, M = Monitor, A = Action

Service Brake Pressure

ReferenceRefer to Testing & Adjusting, UENR3800, "Service Brake System Pressure - Test" for more detail on the following test.

Table 20

Status (1)	Description	Specification	Actual	Comments
	Front Wheels with brake pedal FULLY depressed (2)	5862 ± 690 kPa (± 100 psi)
	Maximum front brake pressure within 5 seconds of releasing pedal (2)	140 kPa (20 psi)
	Rear Wheels with brake pedal FULLY depressed (2)	5690 ± 690 kPa (825 ± 100 psi)
	Maximum rear brake pressure within 5 seconds of releasing pedal (2)	140 kPa (20 psi)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Set engine at LOW IDLE

Brake Accumulator Charging Valve

ReferenceRefer to Testing & Adjusting, UENR3457, "Brake Accumulator Charging Valve- Test" for more detail on the following test.

Table 21

Status (1)	Description	Specification	Actual	Comments
	Cut- in Pressure	13800 ± 350 kPa (2000 ± 50 psi)
	Cut-out Pressure	18000 ± 350 kPa (2610 ± 50 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Gear Pump (Brake Cooling) - Test

ReferenceRefer to Testing & Adjusting, UENR3457, "Gear Pump (Brake Cooling) - Test" for more detail on the following test.

Table 22

Status (1)	Description	Specification	Actual	Comments
	Gear Pump (Brake Cooling) Pressure	Greater than 30 kPa (4 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Parking Brake Pressure

ReferenceRefer to Testing & Adjusting, UENR3800, "Parking Brake - Test and Adjust" for more detail on the following test.

Table 23

Status (1)	Description	Specification	Actual	Comments
	Engine off with parking brake switch ON	500 kPa (73 psi)
	Low idle with parking brake switch OFF	5735 ± 345 kPa (832 ± 50 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Power Train System

Relief Valve Pressure

ReferenceRefer to Testing & Adjusting, UENR3800, "Relief Valve (Main) - Test and Adjust (Power Train)" for more detail on the following test.

Table 24

Status (1)	Description	Specification	Actual	Comments
	Low Idle	2827 kPa (410 psi) to 3103 kPa (450 psi)
	High Idle	3034 kPa (440 psi) to 3241 kPa (470 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Transmission Lube Oil Test

ReferenceRefer to Testing & Adjusting, UENR3800, "Transmission Lubrication Oil Pressure - Test" for more detail on the following test.

Table 25

Status (1)	Description	Specification	Actual	Comments
	Low Idle	5 kPa (0.73 psi)
	High Idle	85 ± 20 kPa (12 ± 3 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Transmission Clutch Pressure Test

ReferenceRefer to Testing & Adjusting, UENR3800, "Transmission Clutch Pressure - Test" for more detail on the following test.

Table 26

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)

( 1 )

N = Normal, M = Monitor, A = Action

Torque Converter Inlet Oil Pressure

ReferenceRefer to Testing & Adjusting, UENR3800, "Torque Converter Inlet Oil Pressure - Test" for more detail on the following test.

Table 27

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

( 1 )

N = Normal, M = Monitor, A = Action

Torque Converter Outlet Pressure

ReferenceRefer to Testing & Adjusting, UENR3800, "Torque Converter Outlet Relief Valve Pressure - Test and Adjust" for more detail on the following test.

Table 28

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

( 1 )

N = Normal, M = Monitor, A = Action

S.O.S.

ReferenceRefer to Operation and Maintenance Manual, SEBU9134, "Maintenance Section" for more detail and port locations on the following S.O.S. service.

Table 29

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

( 1 )

N = Normal, M = Monitor, A = Action