990H Wheel Loader TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565} Caterpillar

990H Wheel Loader TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565}

Usage:

990H BWX

Wheel Loader:: 990H (S/N: BWX1-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

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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	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 - Test".
	Electric Starting System Test	12 to 16 V at −23° C (−10° F) to −7° C (19° F)		Refer to Testing and Adjusting, SENR9937, "Electrical 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	400 ± 44 N (90 ± 10 lb)
	Difference between the Upper and Lower Radiator Tank Temperatures	5° + 5° - 5° C (41° + 41°- 41° F)
	Jacket Water Inlet Temperature from Cooling System	94° + 3°- 3° C (201° + 37° - 37° F)

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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 System Pressure at HIGH IDLE	786 + 264 - 262 kPa (114 + 38 - 38 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Basic Engine

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Table 4
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Engine Speed at Low Idle	865 ± 10 rpm
	Engine Speed at High Idle	2160 ± 40 rpm

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^( 1 )

N = Normal, M = Monitor, A = Action

Lubrication System

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Table 5
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Engine Oil Pressure at LOW IDLE	230 + 370 - 170 kPa (33 + 54 - 25 psi)
	Engine Oil Pressure at HIGH IDLE	350 + 250 - 170 kPa (51 + 36 - 25 psi)

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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 Oil Temperature	74° to 105°C (165° to 221°F)
	Torque Converter Stall Speed	1700 ± 55 rpm
	Boost Pressure	107.5 ± 16.2 kPa (15.6 ± 2.3 psi)
	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.

Hydraulic Performance Checks

ReferenceRefer to Testing & Adjusting, RENR8823, "Hydraulic System" for more detail on the following test.

Implement Cycle Time - Check

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Table 7
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Lift Raise Time	9.6 seconds
	Lift Lower Time	4.3 seconds
	Dump Time	2.5 seconds
	Tilt Back Time	2.0 seconds

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^( 1 )

N = Normal, M = Monitor, A = Action

Lift and Tilt Cylinder Drift - Check

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Table 8
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Maximum Implement Drift in 5.0 minutes ⁽²⁾ for Rod Movement of Lift Cylinder (Without Ride Control)	17 mm (0.7 inch)
	Maximum Implement Drift in 2.7 minutes ⁽³⁾ for Rod Movement of Lift Cylinder (Without Ride Control)	17 mm (0.7 inch)
	Maximum Implement Drift in 1.7 minutes ⁽⁴⁾ for Rod Movement of Lift Cylinder (Without Ride Control)	17 mm (0.7 inch)
	Maximum Implement Drift in 5.0 minutes ⁽²⁾ for Rod Movement of Lift Cylinder (With Ride Control)	25 mm (1.0 inch)
	Maximum Implement Drift in 2.7 minutes ⁽³⁾ for Rod Movement of Lift Cylinder (With Ride Control)	25 mm (1.0 inch)
	Maximum Implement Drift in 1.7 minutes ⁽⁴⁾ for Rod Movement of Lift Cylinder (With Ride Control)	25 mm (1.0 inch)
	Maximum Implement Drift in 5.0 minutes ⁽²⁾ for Rod Movement of Tilt Cylinder (With/Without Ride Control)	25 mm (1.0 inch)
	Maximum Implement Drift in 2.7 minutes ⁽³⁾ for Rod Movement of Tilt Cylinder (With/Without Ride Control)	25 mm (1.0 inch)
	Maximum Implement Drift in 1.7 minutes ⁽⁴⁾ for Rod Movement of Tilt Cylinder (With/Without Ride Control)	25 mm (1.0 inch)

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	Oil temperature below 49° C (120° F).
^( 3 )	Oil temperature between 49° to 66°C (120° to 150°F).
^( 4 )	Oil temperature between 66° to 90°C (150° to 195°F).

Brake Performance Checks

ReferenceRefer to Testing & Adjusting, RENR8820, "Braking System" for more detail on the following test.

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Table 9
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Brake Accumulator - Test
	Service Brake Holding Ability Test
	Parking Brake Holding Ability Test

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^( 1 )

N = Normal, M = Monitor, A = Action

Steering Performance Checks

ReferenceRefer to Testing & Adjusting, RENR8817, "Steering System" for more detail on the following test.

Steering Time - Check and Adjust

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Table 10
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Left Steering Time for a Full Turn from Stop to Stop (HIGH IDLE)	3.7 ± 0.3 seconds
	Right Steering Time for a Full Turn from Stop to Stop (HIGH IDLE)	3.7 ± 0.3 seconds
	Left Steering Time for a Full Turn from Stop to Stop (LOW IDLE)	7.4 ± 0.6 seconds
	Right Steering Time for a Full Turn from Stop to Stop (LOW IDLE)	7.4 ± 0.6 seconds
	Difference between the steering time for a right turn and the steering time for a left turn	must not be more than 0.3 second
	Steering Time (When the service brakes are applied)	must not increase by more than 0.2 second

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^( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic System

ReferenceRefer to Testing & Adjusting, RENR8823, "Hydraulic System" for more detail on the following test.

Pilot System Pressure - Test

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Table 11
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Pilot System Pressure at LOW IDLE at Oil Temperature of 49° ± 3°C (120° ± 5.4°F)	2520 ± 100 kPa (365 ± 15 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Accumulator (Pilot) - Test and Charge

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Table 12
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Accumulator Pressure (HIGH IDLE)	2520 ± 100 kPa (365 ± 15 psi)
	Accumulator Pressure (Dead Engine Lower)	900 ± 100 kPa (130 ± 15 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

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Table 13
Accumulator Precharge Pressure/Temperature Relationship for the 900 kPa (130 psi) Accumulator
Temperature	Pressure
−7°C (20°F)	806 kPa (117 psi)
−1°C (30°F)	825 kPa (119.6 psi)
4°C (40°F)	843 kPa (122.2 psi)
10°C (50°F)	860 kPa (124.8 psi)
16°C (60°F)	878 kPa (127.4 psi)
21°C (70°F)	900 kPa (130 psi)
27°C (80°F)	914 kPa (132.6 psi)
32°C (90°F)	932 kPa (135.2 psi)
38°C (100°F)	950 kPa (137.8 psi)
43°C (110°F)	968 kPa (140.4 psi)
49°C (120°F)	986 kPa (143 psi)

Manifold and Relief Valve (Main) - Test and Adjust

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Table 14
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Main Relief Valve Pressure for Fixed Displacement Pump	31000 ± 340 kPa (4500 ± 50 psi)
	Main Relief Valve Pressure for Variable Displacement Pump	28100 ± 400 kPa (4076 ± 58 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Line) - Test and Adjust

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Table 15
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Line Relief Valve Pressure (Raise)	38000 ± 700 kPa (5500 ± 100 psi)
	Line Relief Valve Pressure (Tilt Back)	34500 ± 700 kPa (5000 ± 100 psi)
	Line Relief Valve Pressure (Dump)	21730 ± 700 kPa (3150 ± 100 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Selector and Pressure Control Valve (Dead Engine Lower) - Test and Adjust

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Table 16
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Selector and Pressure Control Valve (Dead Engine Lower)	1650 ± 100 kPa (240 ± 15 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Ride Control Accumulator - Test and Charge

Refer to Special Instruction, REHS5464, "Accumulator Discharging and Charging Procedures" for the required tooling and the testing and charging procedure.

Specifications

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Table 17
Accumulator Precharge Pressure/Temperature Relationship for a Typical Accumulator with a Precharge of 5000 kPa (725 psi)
Temperature	Pressure
−7 °C (20 °F)	4530 kPa (657 psi)
−1 °C (30 °F)	4624 kPa (671 psi)
4 °C (40 °F)	4717 kPa (684 psi)
10 °C (50 °F)	4810 kPa (698 psi)
16 °C (60 °F)	4905 kPa (711 psi)
21 °C (70 °F)	5000 kPa (725 psi)
27 °C (80 °F)	5092 kPa (739 psi)
32 °C (90 °F)	5185 kPa (752 psi)
38 °C (100 °F)	5198 kPa (754 psi)
43 °C (110 °F)	5270 kPa (764 psi)
49 °C (120 °F)	5364 kPa (778 psi)

Power Train System

ReferenceRefer to Testing & Adjusting, RENR8811, "Power Train System" for more detail on the following tests.

Tire Pressure

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Table 18
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Front Left Tire Pressure			See Tire Manufacture Recommendations
	Front Right Tire Pressure			See Tire Manufacture Recommendations
	Rear Left Tire Pressure			See Tire Manufacture Recommendations
	Rear Right Tire Pressure			See Tire Manufacture Recommendations

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^( 1 )

N = Normal, M = Monitor, A = Action

Torque Converter Impeller Clutch Pressure - Test

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Table 19
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Impeller Clutch Top Pressure at HIGH IDLE	1950 kPa (285 psi)
	Impeller Clutch Top Pressure at HIGH IDLE	220 ± 150 kPa (32 ± 22 psi) ⁽²⁾

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	Pressure with the left brake pedal fully depressed.

Torque Converter Lockup Clutch Pressure - Test

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Table 20
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Lockup Clutch Pressure at HIGH IDLE	2030 ± 240 kPa (295 ± 35 psi) with an activated solenoid
	Lockup Clutch Pressure at HIGH IDLE	less than 170 kPa (25 psi) ⁽²⁾
	Torque Converter Inlet Pressure	930 kPa (135 psi)
	Torque Converter Outlet Pressure	550 kPa (80 psi) maximum
	Torque Converter Outlet Pressure	415 kPa (60 psi) minimum

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	when the solenoid is not activated.

Torque Converter Stall - Test

This test is performed using the operator monitor. Refer to Testing and Adjusting, RENR8811, "Torque Converter Stall - Test" for further instruction.

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Table 21
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Torque Converter Stall Speed	1900 ± 55 RPM

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^( 1 )

N = Normal, M = Monitor, A = Action

Transmission Pressures - Test and Adjust

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Table 22
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Speed Clutch P1 (Initial Pressure) at LOW IDLE	530 ± 35 kPa (77 ± 5 psi)
	Speed Clutch Pressure P1 at LOW IDLE	must be more than 2000 kPa (290 psi)
	Speed Clutch Pressure P1 at HIGH IDLE	2550 ± 140 kPa (370 ± 20 psi)
	Direction Clutch P2 Pressure at LOW IDLE	380 ± 35 kPa (55 ± 5 psi) more than the speed clutch pressure P1
	Direction Clutch P2 Pressure at HIGH IDLE	380 ± 35 kPa (55 ± 5 psi) more than the speed clutch pressure P1
	Transmission Lubrication Oil Pressure at HIGH IDLE	138 ± 35 kPa (20 ± 5 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Steering System

ReferenceRefer to Testing & Adjusting, RENR8817, "Steering System" for more detail on the following tests.

Steering System Pressure (High Pressure Stall) - Test and Adjust

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Table 23
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Steering System Pressure (High Pressure Stall) at HIGH IDLE	31000 ± 750 kPa (4500 ± 110 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Piston Pump (Steering) Margin Pressure - Test and Adjust

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Table 24
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Piston Pump (Steering) Margin Pressure at HIGH IDLE ⁽²⁾	2100 ± 100 kPa (305 ± 15 psi)

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^( 1 )	N = Normal, M = Monitor, A = Action
^( 2 )	If you are using tetragauges, the steering pump pressure should be 2400 ± 100 kPa (348 ± 15 psi) higher than the pressure in the load sensing line. This is the margin pressure. These pressures must be read during the articulation of the machine.

Relief Valve (Pump Backup) - Test and Adjust

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Table 25
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Relief Valve (Pump Backup) Pressure	34500 ± 700 kPa (5000 ± 100 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Steering Cylinder Crossover) - Test and Adjust

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Table 26
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Relief Valve (Steering Cylinder Crossover) Pressure	34500 ± 700 kPa (5000 ± 100 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Secondary Steering) - Test and Adjust

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Table 27
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Secondary Steering Relief Valve Pressure	17300 ± 700 kPa (2510 ± 100 psi)

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N = Normal, M = Monitor, A = Action

Steering Neutralizer Valve - Check and Adjust

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Table 28
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Pressed Putty Thickness	35 mm (1.375 inch)

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N = Normal, M = Monitor, A = Action

Brake and Hydraulic Fan System

ReferenceRefer to Testing & Adjusting, RENR8823, "Hydraulic System", and Testing & Adjusting, RENR8820, "Braking System" for more detail on the following tests.

Hydraulic Fan Speed - Test and Adjust

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Table 29
Hydraulic Fan Speeds ⁽¹⁾
Altitude	990H Standard	990H High Ambient
Altitude	Target Max Fan Speed	Target Max Fan Speed
240 m (787 ft)	750 rpm	840 rpm
500 m (1640 ft)	760 rpm	850 rpm
1000 m (3281 ft)	780 rpm	880 rpm
1500 m (4921 ft)	800 rpm	900 rpm
2000 m (6562 ft)	830 rpm	930 rpm
2500 m (8202 ft)	860 rpm	960 rpm
3000 m (9842 ft)	880 rpm	970 rpm
3500 m (11483 ft)	910 rpm	970 rpm
4000 m (13123 ft)	940 rpm	970 rpm
4500 m (14764 ft)	970 rpm	970 rpm
5000 m (16404 ft)	970 rpm	970 rpm

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The hydraulic fan speed is at high RPM. Calibration of the Hydraulic Fan System is done through Caterpillar Electronic Technician.

Brake Accumulator - Test and Charge

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Table 30
Accumulator Precharge Pressure/Temperature Relationship for the 5520 kPa (800 psi) Service Brake Accumulators
Temperature	Pressure
−7°C (20°F)	5000 kPa (726 psi)
−1°C (30°F)	5105 kPa (741 psi)
4°C (40°F)	5235 kPa (760 psi)
10°C (50°F)	5340 kPa (775 psi)
16°C (60°F)	5420 kPa (787 psi)
21°C (70°F)	5500 kPa (798 psi)
27°C (80°F)	5605 kPa (813 psi)
32°C (90°F)	5735 kPa (832 psi)
38°C (100°F)	5840 kPa (848 psi)
43°C (110°F)	5920 kPa (859 psi)
49°C (120°F)	6000 kPa (871 psi)

Service Brake System Pressure - Test

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Table 31
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Rear Service Brake Pressure (Brake ON)	4310 ± 350 kPa (625 ± 50 psi)
	Front Service Brake Pressure (Brake ON)	4100 ± 350 kPa (595 ± 50 psi)

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^( 1 )

N = Normal, M = Monitor, A = Action

S·O·S Samples

ReferenceRefer to Operation and Maintenance Manual, SEBU7886, "Maintenance Interval Schedule" for more detail on performing S.O.S samples.

Engine Oil Sample

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Table 32
Status ⁽¹⁾	Description	Obtain	Comments
	Engine Oil Sample

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^( 1 )

N = Normal, M = Monitor, A = Action

Engine Coolant Sample

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Table 33
Status ⁽¹⁾	Description	Obtain	Comments
	Engine Coolant Sample

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^( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic Oil Sample

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Table 34
Status ⁽¹⁾	Description	Obtain	Comments
	Hydraulic Oil Sample

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^( 1 )

N = Normal, M = Monitor, A = Action

Differential & Final Drive Oil Samples (Inboard Final Drives)

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Table 35
Status ⁽¹⁾	Description	Obtain	Comments
	Front Differential & Final Drive Oil Sample
	Rear Differential & Final Drive Oil Sample

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^( 1 )

N = Normal, M = Monitor, A = Action

Differential & Final Drive Oil Samples (Outboard Final Drives)

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Table 36
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