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

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

Usage:

Wheel Loader:: 990 Series II (S/N: BCR1-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

Show/hide table

Table 1
Description	Specification	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, SENR1018, "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)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Engine

Cooling System

Show/hide table

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 (45° + 41°- 41° F)
	Jacket Water Inlet Temperature from Cooling System	94° + 3°- 3° C (201° + 37° - 37° F)

Show/hide table

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

Fuel System

Show/hide table

Table 3
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Fuel System Pressure at HIGH IDLE	473 + 247 - 113 kPa (69 ± 36 - 16 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Basic Engine

Show/hide table

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

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Lubrication System

Show/hide table

Table 5
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Engine Oil Pressure at LOW IDLE	167 + 433 - 67 kPa (24 + 63 - 10 psi)
	Engine Oil Pressure at HIGH IDLE	275 + 325 - 0 kPa (40 + 47 - 0 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Air Inlet and Exhaust System

Show/hide table

Table 6
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Torque Converter Oil Temperature	75° to 115°C (167° to 239°F)
	Torque Converter Stall Speed	1880 ± 55 rpm
	Boost Pressure	71.3 ± 10.7 kPa (10.3 ± 1.6 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⁾

Show/hide table

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

Hydraulic Performance Checks

ReferenceRefer to Testing & Adjusting, RENR6261, "Hydraulic System" for more detail on the following test.

Implement Cycle Time - Check

Show/hide table

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

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Lift and Tilt Cylinder Drift - Check

Show/hide table

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)

Show/hide table

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

Brake Performance Checks

ReferenceRefer to Operation and Maintenance Manual, SEBU7496, "Braking System - Test" for more detail on the following test.

Show/hide table

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

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Steering Performance Checks

ReferenceRefer to Testing & Adjusting, RENR6255, "Steering System" for more detail on the following test.

Steering Cycle Time

Show/hide table

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

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic System

ReferenceRefer to Testing & Adjusting, RENR6261, "Hydraulic System" for more detail on the following test.

Pump Performance (Implement) - Test

Show/hide table

Table 11
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Stall Speed in THIRD SPEED REVERSE	1870 ± 65 rpm

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Torque Converter Stall and Implement Pump Double Stall - Test

Show/hide table

Table 12
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Double Stall Speed in THIRD SPEED REVERSE	1365 ± 65 rpm

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Pilot System Pressure - Test

Show/hide table

Table 13
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Pilot System Pressure at LOW IDLE	2400 ± 100 kPa (350 ± 15 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Accumulator (Pilot) - Test and Charge

Show/hide table

Table 14
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Nitrogen Precharge Pressure at LOW IDLE	690 ± 69 kPa (100 ± 10 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Main) - Test and Adjust

Show/hide table

Table 15
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Main Relief Valve Pressure at HIGH IDLE	31000 ± 340 kPa (4500 ± 50 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Line) - Test and Adjust

Show/hide table

Table 16
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Line Relief Valve Pressure (Control Lever at Raise position)	38000 ± 700 kPa (5500 ± 100 psi)
	Line Relief Valve Pressure (Control Lever at Tilt Back position)	34500 ± 700 kPa (5000 ± 100 psi)
	Line Relief Valve Pressure (Control Lever at Dump position)	21730 ± 700 kPa (3150 ± 100 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

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

Show/hide table

Table 17
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Selector and Pressure Control Valve Pressure (Dead Engine Lower)	1600 ± 100 kPa (230 ± 15 psi)

Show/hide table

^( 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

Show/hide table

Table 18
Accumulator Precharge Pressure/Temperature Relationship for a Typical Accumulator with a Precharge of 3445 kPa (500 psi)
Temperature	Pressure ⁽¹⁾
−7 °C (20 °F)	3100 kPa (450 psi)
−1 °C (30 °F)	3170 kPa (460 psi)
4 °C (40 °F)	3240 kPa (470 psi)
10 °C (50 °F)	3310 kPa (480 psi)
16 °C (60 °F)	3375 kPa (490 psi)
21 °C (70 °F)	3445 kPa (500 psi)
27 °C (80 °F)	3515 kPa (510 psi)
32 °C (90 °F)	3585 kPa (520 psi)
38 °C (100 °F)	3655 kPa (530 psi)
43 °C (110 °F)	3725 kPa (540 psi)
49 °C (120 °F)	3790 kPa (550 psi)

Show/hide table

^( 1 )

Nominal allowable tolerance equals 70 kPa (10 psi)

Power Train System

ReferenceRefer to Testing & Adjusting, RENR6252, "Power Train System" for more detail on the following tests.

Tire Pressure

Show/hide table

Table 19
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

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Torque Converter Stall - Test

This test is performed using the operator monitor. Refer to Testing and Adjusting, RENR6252, "Torque Converter Stall - Test" for further instruction.

Show/hide table

Table 20
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Torque Converter Stall Speed	1880 ± 55 RPM

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Transmission Pressures - Test and Adjust

Show/hide table

Table 21
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Speed Clutch Pressure (Initial Pressure) (P1) at LOW IDLE at Pressure Tap (E)	530 ± 35 kPa (77 ± 5 psi) when the direction switch is in the NEUTRAL position
	Speed Clutch Pressure (P1) at LOW IDLE at Pressure Tap (E)	more than 2000 kPa (290 psi)
	Speed Clutch Pressure (P1) at HIGH IDLE at Pressure Tap (E)	2550 ± 140 kPa (370 ± 20 psi) when the direction switch is in FORWARD or in REVERSE and any speed is selected
	Direction Clutch Pressure (P2) at LOW IDLE at Pressure Tap (F)	380 ± 35 kPa (55 ± 5 psi) lower than the speed clutch pressure at pressure tap (E)
	Direction Clutch Pressure (P2) at HIGH IDLE at Pressure Tap (F)	380 ± 35 kPa (55 ± 5 psi) lower than the speed clutch pressure at pressure tap (E)
	Transmission Lubrication Oil Pressure at HIGH IDLE at Pressure Tap (H)	138 ± 35 kPa (20 ± 5 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Steering System

ReferenceRefer to Testing & Adjusting, RENR6255, "Steering System" for more detail on the following tests.

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

Show/hide table

Table 22
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Steering System Pressure (High Pressure Stall) at HIGH IDLE	31000 ± 1000 kPa (4500 ± 145 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Piston Pump (Steering) Low Pressure Standby - Test and Adjust

Show/hide table

Table 23
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Piston Pump (Steering) Low Pressure Standby at HIGH IDLE	3755 ± 1240 kPa (545 ± 180 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Piston Pump (Steering) Margin Pressure - Test and Adjust

Show/hide table

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

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Steering Cylinder Crossover) - Test and Adjust

Show/hide table

Table 25
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Relief Valve (Steering Cylinder Crossover) Pressure	34000 ± 500 kPa (4950 ± 75 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Pump Backup) - Test and Adjust

Show/hide table

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

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Secondary Steering) - Test and Adjust

Show/hide table

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

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Steering Neutralizer Valve - Check and Adjust

Show/hide table

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

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Brake and Hydraulic Fan System

ReferenceRefer to Testing & Adjusting, RENR6261, "Hydraulic System", and Testing & Adjusting, RENR6258, "Braking System" for more detail on the following tests.

Hydraulic Fan Speed - Test and Adjust

Show/hide table

Table 29
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Margin Pressure for the Fan Pump at HIGH IDLE	2103 ± 103 kPa (305 ± 15 psi)
	Cut off Pressure for Standard Fan at HIGH IDLE	10600 ± 350 kPa (1535 ± 50 psi)
	Cut off Pressure for High Ambient Fan at HIGH IDLE	13600 ± 350 kPa (1950 ± 50 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Brake Accumulator - Test and Charge

Show/hide table

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 Braking System Pressure - Test

Show/hide table

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)	4310 ± 350 kPa (625 ± 50 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Braking System Backup) - Test and Adjust

Show/hide table

Table 32
Status ⁽¹⁾	Description	Specification	Actual	Comments
	Oil Pressure	22750 ± 450 kPa (3300 ± 65 psi)

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

S·O·S Samples

ReferenceRefer to Operation and Maintenance Manual, SEBU7496, "Maintenance Interval Schedule" for more detail on performing S.O.S samples.

Engine Oil Sample

Show/hide table

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

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Engine Coolant Sample

Show/hide table

Table 34
Status ⁽¹⁾	Description	Obtain	Comments
	Engine Coolant Sample

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Hydraulic Oil Sample

Show/hide table

Table 35
Status ⁽¹⁾	Description	Obtain	Comments
	Hydraulic Oil Sample

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Differential & Final Drive Oil Samples (Inboard Final Drives)

Show/hide table

Table 36
Status ⁽¹⁾	Description	Obtain	Comments
	Front Differential & Final Drive Oil Sample
	Rear Differential & Final Drive Oil Sample

Show/hide table

^( 1 )

N = Normal, M = Monitor, A = Action

Differential & Final Drive Oil Samples (Outboard Final Drives)

Show/hide table

Table 37
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