906 and 908 Compact Wheel Loader TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565} Caterpillar

Compact Wheel Loader:

906 (S/N: MER1-UP)

908 (S/N: TAR1-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.

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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	14 ± 1 V		Refer to Special Instruction, REHS0354, "Charging System Troubleshooting".
	Electric Starting System Test	6 to 8 V at −23° C (−10° F) to −7° C (19° F)		Refer to Testing and Adjusting, RENR7578, "Electric 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)

( 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	17 ± 3 mm (0.7 ± 0.1 inch)
	Difference between the Upper and Lower Radiator Tank Temperatures	-
	Jacket Water Inlet Temperature from Cooling System	82° ± 1.5°C (180° ± 2.7°F) (3)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Test for the pressure that is listed on the cap.
( 3 )	For 906 S/N:MER1-UP only.

Lubrication System

Table 3

Status (1)	Description	Specification	Actual	Comments
	Engine Oil Pressure at LOW IDLE	100 kPa (15 psi)
	Engine Oil Pressure at HIGH IDLE	300 to 500 kPa (44 to 73 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Basic Engine

Table 4

Status (1)	Description	Specification	Actual	Comments
	Engine Speed at LOW IDLE	1000 ± 25 rpm
	Engine Speed at HIGH IDLE	2860 ± 50 rpm

( 1 )

N = Normal, M = Monitor, A = Action

Air Inlet and Exhaust System

Table 5

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)
	Cylinder # 7 Exhaust Temperature (2)
	Cylinder # 8 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, RENR6458, "Hydraulic and Steering System" for more detail on the following test.

Implement Cycle Time - Check

Table 6

Status (1)	Description	Specification		Actual	Comments
		906 S/N:MER1-UP	908 S/N:TAR1-UP
	Implement Cycle Time for lift control lever from full LOWER to full RAISE	3.9 ± 0.3 seconds	4.3 ± 0.3 seconds
	Implement Cycle Time for lift control lever from full RAISE to full LOWER	3.6 ± 0.5 seconds	2.8 ± 0.5 seconds
	Implement Cycle Time for tilt control lever from full TILT BACK to full DUMP	1.6 ± 0.3 seconds	1.6 ± 0.3 seconds
	Implement Cycle Time for tilt control lever from full DUMP to full TILT BACK	1.9 ± 0.3 seconds	1.9 ± 0.3 seconds

( 1 )

N = Normal, M = Monitor, A = Action

Lift and Tilt Cylinder Drift - Check

Lift Cylinder

Table 7

Status (1)	Description	Specification	Actual	Comments
	Maximum Implement Drift in 3.0 minutes	Less than 15 mm (0.60 inch)

( 1 )

N = Normal, M = Monitor, A = Action

Tilt Cylinder

Table 8

Status (1)	Description	Specification	Actual	Comments
	Maximum Implement Drift in 3.0 minutes	Less than 15 mm (0.60 inch)

( 1 )

N = Normal, M = Monitor, A = Action

Steering Cycle Time - Check

Table 9

Status (1)	Description	Specification	Actual	Comments
	Time for a Full Turn from Left Stop to the Right Stop	6.4 ± 1.0 seconds
	Time for a Full Turn from Right Stop to the Left Stop	5.6 ± 1.0 seconds

( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic System

ReferenceRefer to Testing & Adjusting, RENR6458, "Hydraulic and Steering System" for more detail on the following test.

Pilot System Pressure - Test

Table 10

Status (1)	Description	Specification		Actual	Comments
		906 S/N:MER1-UP	908 S/N:TAR1-UP
	Charge Pressure at LOW IDLE	3150 ± 350 kPa (460 ± 50 psi)	3150 ± 350 kPa (460 ± 50 psi)
	Charge Pressure at HIGH IDLE	3300 ± 200 kPa (480 ± 30 psi)	3200 ± 200 kPa (465 ± 30 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Accumulator (Pilot Oil) - Test and Charge

Table 11

Status (1)	Description	Specification	Actual	Comments
	Accumulator Charge Pressure	1000 ± 50 kPa (145 ± 7 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Steering System Pressure - Test

Table 12

Status (1)	Description	Specification		Actual	Comments
		906 S/N:MER1-UP	908 S/N:TAR1-UP
	Steering System Pressure at LOW IDLE	750 ± 500 kPa (110 ± 72 psi)	1400 ± 500 kPa (205 ± 72 psi)
	Steering System Pressure at HIGH IDLE	1200 ± 500 kPa (175 ± 72 psi)	2000 ± 500 kPa (290 ± 72 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Priority Valve - Test and Adjust

Table 13

Status (1)	Description	Specification	Actual	Comments
	Priority Valve Load Sensing Pressure at LOW IDLE	17500 ± 1500 kPa (2550 ± 220 psi)
	Priority Valve Load Sensing Pressure at HIGH IDLE	18000 ± 1500 kPa (2600 ± 220 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Main Relief Valve - Test and Adjust

Table 14

Status (1)	Description	Specification	Actual	Comments
	Main Relief Valve Pressure	23500 ± 1000 kPa (3400 ± 145 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Line Relief Valve (Lift Cylinder Head End) - Test

Table 15

Status (1)	Description	Specification	Actual	Comments
	Line Relief Valve Pressure for Lift Cylinder at Head End	27600 ± 1000 kPa (4000 ± 145 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Line Relief Valve (Tilt Cylinder Head End) - Test and Adjust

Table 16

Status (1)	Description	Specification	Actual	Comments
	Line Relief Valve Pressure for Tilt Cylinder at Head End	15500 ± 1000 kPa (2250 ± 145 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Line Relief Valve (Tilt Cylinder Rod End) - Test and Adjust

Table 17

Status (1)	Description	Specification	Actual	Comments
	Line Relief Valve Pressure for Tilt Cylinder at Rod End	26000 ± 1000 kPa (3750 ± 145 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Line Relief Valve (Auxiliary) - Test and Adjust

Table 18

Status (1)	Description	Specification	Actual	Comments
	Line Relief Valve Pressure for Left Auxiliary Line	20700 ± 1000 kPa (3000 ± 145 psi)
	Line Relief Valve Pressure for Right Auxiliary Line	20700 ± 1000 kPa (3000 ± 145 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic Fan Speed - Test and Adjust

Table 19

Status (1)	Description	Specification	Actual	Comments
	Fan Speed at High Idle	2250 ± 50 rpm

( 1 )

N = Normal, M = Monitor, A = Action

Power Train System

ReferenceRefer to Testing & Adjusting, RENR6456, "Power Train System" for more detail on the following test.

Hydrostatic System - Test and Adjust

Table 20

Status (1)	Description	Specification	Actual	Comments
	Pump Neutral Setting	0 ± 50 kPa (0 ± 7 psi)

( 1 )

N = Normal, M = Monitor, A = Action

S·O·S Samples

ReferenceRefer to Operation and Maintenance Manual, SEBU7415, "Maintenance Interval Schedule" for more detail on performing S.O.S samples.

Engine Oil Sample

Table 21

Status (1)	Description	Obtain	Comments
	Engine Oil Sample

( 1 )

N = Normal, M = Monitor, A = Action

Engine Coolant Sample

Table 22

Status (1)	Description	Obtain	Comments
	Engine Coolant Sample

( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic Oil Sample

Table 23

Status (1)	Description	Obtain	Comments
	Hydraulic Oil Sample

( 1 )

N = Normal, M = Monitor, A = Action

Differential & Final Drive Oil Samples (Inboard Final Drives)

Table 24

Status (1)	Description	Obtain	Comments
	Front Differential & Final Drive Oil Sample
	Rear Differential & Final Drive Oil Sample

( 1 )

N = Normal, M = Monitor, A = Action

Differential & Final Drive Oil Samples (Outboard Final Drives)

Table 25

Status (1)	Description	Obtain	Comments
	Front Differential Oil Sample
	Rear Differential Oil Sample
	Left Front Final Drive Oil Sample
	Right Front Final Drive Oil Sample
	Left Rear Final Drive Oil Sample
	Right Rear Final Drive Oil Sample

( 1 )

N = Normal, M = Monitor, A = Action

Transmission/Torque Converter Oil Sample

Table 26

Status (1)	Description	Obtain	Comments
	Transmission/Torque Converter Oil Sample

( 1 )

N = Normal, M = Monitor, A = Action