- Wheel Loader
- 990K (S/N: DJK1-UP; A9P1-UP; M9P1-UP; K9X1-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.
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- Open the document with Microsoft Word.
Electrical System
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Table 1
Status(1) |
Description |
Specification |
Actual |
Comments |
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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). |
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Battery Test |
12.4 VDC or more |
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Refer to Special Instruction, SEHS7633, "Battery Test Procedure". |
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Charging System Test |
28 ± 1 V |
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Refer to Special Instruction, REHS0354, "Charging System Troubleshooting". |
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Electric Starting System Test |
12 to 16 V at −23° C (−10° F) to −7° C (19° F) |
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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
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Table 2
Status(1) |
Description |
Specification |
Actual |
Comments |
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Radiator Pressure Relief (Radiator Cap)(2) |
- |
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Freezing Point of Engine Coolant |
- |
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Conditioner Test of Engine Coolant |
- |
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Belt Tension |
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Difference between the Upper and Lower Radiator Tank Temperatures |
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Jacket Water Inlet Temperature from Cooling System |
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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 |
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Fuel System Pressure at LOW IDLE |
650 ± 50 kPa (94 ± 7 psi) |
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Fuel System Pressure at HIGH IDLE |
705 ± 50 kPa (102 ± 7 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 |
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Engine Speed at Low Idle |
700 ± 10 RPM |
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Engine Speed at High Idle |
2010 ± 40 RPM |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action2010 |
Lubrication System
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Table 5
Status(1) |
Description |
Specification |
Actual |
Comments |
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Engine Oil Pressure at LOW IDLE |
200 kPa (29 psi) |
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Engine Oil Pressure |
345 kPa (50 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Air Inlet and Exhaust System
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Table 6
Status(1) |
Description |
Specification |
Actual |
Comments |
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Torque Converter Stall Oil Temperature |
60° to 121°C (140° to 219°F) |
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Torque Converter Stall Speed |
1990 +10 - 65 rpm |
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Torque Converter Double Stall Oil Temperature |
93° ± 17°C (199° ± 30°F) |
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Torque Converter Double Stall Speed |
1428 ± 100 rpm |
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Cylinder # 1 Exhaust Temperature(2) |
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Cylinder # 2 Exhaust Temperature ***#i05833736/d28266e1012*** |
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Cylinder # 3 Exhaust Temperature ***#i05833736/d28266e1012*** |
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Cylinder # 4 Exhaust Temperature ***#i05833736/d28266e1012*** |
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Cylinder # 5 Exhaust Temperature ***#i05833736/d28266e1012*** |
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Cylinder # 6 Exhaust Temperature ***#i05833736/d28266e1012*** |
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Cylinder # 7 Exhaust Temperature ***#i05833736/d28266e1012*** |
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Cylinder # 8 Exhaust Temperature ***#i05833736/d28266e1012*** |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
(2) |
Compare the exhaust temperature variance at each exhaust port. |
Hydraulic Performance Checks
Reference: Refer to Testing & Adjusting, UENR3849, "Machine Systems" for more detail on the following test.
Implement Cycle Time - Check
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Table 7
Status(1) |
Description |
Specification |
Actual |
Comments |
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Lift Cycle Time |
8.4 ± 0.5 seconds |
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Rack Cycle Time |
4.4 ± 0.3 seconds |
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Dump Cycle Time |
2.4 ± 0.2 seconds |
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Show/hide table
(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 |
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Maximum Implement Drift in 5.0 minutes(2) for Rod Movement of Lift Cylinder without Ride Control |
20 mm (0.78 inch) |
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Maximum Implement Drift in 2.5 minutes(3) for Rod Movement of Lift Cylinder without Ride Control |
20 mm (0.78 inch) |
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Maximum Implement Drift in 1.7 minutes(4) for Rod Movement of Lift Cylinder without Ride Control |
20 mm (0.78 inch) |
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Maximum Implement Drift in 5.0 minutes ***#i05833736/d28266e1406*** for Rod Movement of Lift Cylinder with Ride Control |
25 mm (1 inch) |
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Maximum Implement Drift in 2.5 minutes ***#i05833736/d28266e1451*** for Rod Movement of Lift Cylinder with Ride Control |
25 mm (1 inch) |
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Maximum Implement Drift in 1.7 minutes ***#i05833736/d28266e1496*** for Rod Movement of Lift Cylinder with Ride Control |
25 mm (1 inch) |
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Maximum Implement Drift in 5.0 minutes ***#i05833736/d28266e1406*** for Rod Movement of Tilt Cylinder |
15 mm (0.6 inch) |
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Maximum Implement Drift in 2.5 minutes ***#i05833736/d28266e1451*** for Rod Movement of Tilt Cylinder |
15 mm (0.6 inch) |
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Maximum Implement Drift in 1.7 minutes ***#i05833736/d28266e1496*** for Rod Movement of Tilt Cylinder |
15 mm (0.6 inch) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
(2) |
Oil temperature between 40° C (104° F) to 49° C (120° F). |
(3) |
Oil temperature between 50° C (122° F) to 59° C (138° F). |
(4) |
Oil temperature between 60° C (140° F) to 69° C (156° F). |
Lift Cylinder - Isolation and Drift Check
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Table 9
Status(1) |
Description |
Specification |
Actual |
Comments |
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Maximum Implement Drift in 5.0 minutes(2) for Rod Movement of Lift Cylinder without Ride Control |
20 mm (0.78 inch) |
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Maximum Implement Drift in 2.5 minutes(3) for Rod Movement of Lift Cylinder without Ride Control |
20 mm (0.78 inch) |
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Maximum Implement Drift in 1.7 minutes(4) for Rod Movement of Lift Cylinder without Ride Control |
20 mm (0.78 inch) |
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Maximum Implement Drift in 5.0 minutes ***#i05833736/d28266e1774*** for Rod Movement of Lift Cylinder with Ride Control |
25 mm (1 inch) |
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Maximum Implement Drift in 2.5 minutes ***#i05833736/d28266e1819*** for Rod Movement of Lift Cylinder with Ride Control |
25 mm (1 inch) |
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Maximum Implement Drift in 1.7 minutes ***#i05833736/d28266e1864*** for Rod Movement of Lift Cylinder with Ride Control |
25 mm (1 inch) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
(2) |
Oil temperature between 40° C (104° F) to 49° C (120° F). |
(3) |
Oil temperature between 50° C (122° F) to 59° C (138° F). |
(4) |
Oil temperature between 60° C (140° F) to 69° C (156° F). |
Tilt Cylinder - Isolation and Drift Check
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Table 10
Status(1) |
Description |
Specification |
Actual |
Comments |
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Maximum Implement Drift in 5.0 minutes(2) for Rod Movement of Tilt Cylinder |
15 mm (0.6 inch) |
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Maximum Implement Drift in 2.5 minutes(3) for Rod Movement of Tilt Cylinder |
15 mm (0.6 inch) |
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Maximum Implement Drift in 1.7 minutes(4) for Rod Movement of Tilt Cylinder |
15 mm (0.6 inch) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
(2) |
Oil temperature between 40° C (104° F) to 49° C (120° F). |
(3) |
Oil temperature between 50° C (122° F) to 59° C (138° F). |
(4) |
Oil temperature between 60° C (140° F) to 69° C (156° F). |
Ride Control Valve - Isolation and Drift Check
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Table 11
Status(1) |
Description |
Specification |
Actual |
Comments |
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Maximum Implement Drift in 5.0 minutes(2) for Rod Movement of Lift Cylinder with Ride Control |
25 mm (1 inch) |
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Maximum Implement Drift in 2.5 minutes(3) for Rod Movement of Lift Cylinder with Ride Control |
25 mm (1 inch) |
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Maximum Implement Drift in 1.7 minutes(4) for Rod Movement of Lift Cylinder with Ride Control |
25 mm (1 inch) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
(2) |
Oil temperature between 40° C (104° F) to 49° C (120° F). |
(3) |
Oil temperature between 50° C (122° F) to 59° C (138° F). |
(4) |
Oil temperature between 60° C (140° F) to 69° C (156° F). |
Brake Performance Checks
Reference: Refer to Operation and Maintenance Manual, SEBU9121, "Braking System - Test" for more detail on the following test.
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Table 12
Status(1) |
Description |
Specification |
Actual |
Comments |
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Brake Accumulator - Test |
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Service Brake Holding Ability Test |
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Parking Brake Holding Ability Test |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Steering Performance Checks
Reference: Refer to Testing & Adjusting, UENR3849, "Machine Systems" for more detail on the following test.
Steering Time - Check and Adjust
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Table 13
Status(1) |
Description |
Specification |
Actual |
Comments |
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Left/Right Steering Time for a Full Turn from Stop to Stop (LOW IDLE) |
7.4 ± 0.6 seconds |
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Left/Right Steering Time for a Full Turn from Stop to Stop (HIGH IDLE) |
3.7 ± 0.3 seconds |
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Left Turn/Right Turn Time Difference |
0.3 sec |
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Left Turn/Right Turn Time Difference (While the services brakes are engaged) |
0.2 sec |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Hydraulic System
Reference: Refer to Testing & Adjusting, UENR3849, "Machine Systems" for more detail on the following test.
Pressure Reducing Valve Pressure for Dead Engine Pilot Supply (Engine OFF) - Test and Adjust
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Table 14
Status(1) |
Description |
Specification |
Actual |
Comments |
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Dead Engine Pilot Pressure at High Idle |
1580 ± 300 kPa (230 ± 45 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Pilot Pressure (Pressure Reducing Valve) - Test and Adjust
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Table 15
Status(1) |
Description |
Specification |
Actual |
Comments |
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Implement Pilot Pressure at High Idle |
3500 ± 345 kPa (500 ± 50 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Piston Pump Cutoff Pressure (Hydraulic Fan) - Test and Adjust
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Table 16
Status(1) |
Description |
Specification |
Actual |
Comments |
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Cut off Pressure at High Idle |
27700 ± 500 kPa (4017.6 ± 73 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Ride Control Accumulator - Test and Charge - Dual Accumulator
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Table 17
Accumulator Precharge Pressure Temperature Relationship for a Typical Ride Control Accumulator |
Temperature ° C (° F) |
Pressure Correction kPa (psi) |
−7° C (20° F) |
−270 kPa (−39 psi) |
−1° C (30° F) |
−215 kPa (−31 psi) |
4° C (40° F) |
−160 kPa (−23 psi) |
10° C (50° F) |
−105 kPa (−15 psi) |
16° C (60° F) |
−50 kPa (−7 psi) |
21° C (70° F) |
0 kPa (0 psi) |
27° C (80° F) |
60 kPa (8 psi) |
32° C (90° F) |
115 kPa (16 psi) |
38° C (100° F) |
170 kPa (25 psi) |
43° C (110° F) |
225 kPa (32 psi) |
49° C (120° F) |
280 kPa (40 psi) |
Braking and Hydraulic Fan System
Reference: Refer to Testing & Adjusting, UENR3849, "Machine Systems" for more detail on the following test.
Brake Accumulator - Test and Charge
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Table 18
Status(1) |
Description |
Specification |
Actual |
Comments |
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Brake Accumulator Pressure |
15650 to 16350 kPa (2270 to 2371 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Service Braking System Pressure - Test
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Table 19
Status(1) |
Description |
Specification |
Actual |
Comments |
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Front Service Brake Pressure |
4310 ± 350 kPa (625 ± 50 psi) |
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Rear Service Brake Pressure |
4520 ± 380 kPa (656 ± 55 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Steering System
Reference: Refer to Testing & Adjusting, UENR3849, "Machine Systems" for more detail on the following test.
Pump Performance (Steering) - Test
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Table 20
Status(1) |
Description |
Specification |
Actual |
Comments |
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Steering Time |
3.7 ± 0.3 seconds |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Steering System Pressure (High Pressure Stall) - Test and Adjust
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Table 21
Status(1) |
Description |
Specification |
Actual |
Comments |
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Steering System Pressure at HIGH IDLE |
31000 ± 750 kPa (4500 ± 110 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Piston Pump (Steering) Margin Pressure - Test and Adjust
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Table 22
Status(1) |
Description |
Specification |
Actual |
Comments |
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Flow Compensator Valve Pressure |
2100 ± 100 kPa (305 ± 15 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Relief Valve (Steering Cylinder Crossover) - Test and Adjust
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Table 23
Status(1) |
Description |
Specification |
Actual |
Comments |
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Relief Valve Pressure |
34500 ± 700 kPa (5004 ± 102 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Relief Valve (Pump Backup) - Test and Adjust
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Table 24
Status(1) |
Description |
Specification |
Actual |
Comments |
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Steering Backup Relief Valve Pressure |
34500 ± 700 kPa (5004 ± 102 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Relief Valve (Secondary Steering) - Test and Adjust
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Table 25
Status(1) |
Description |
Specification |
Actual |
Comments |
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Secondary Steering Relief Valve Pressure |
17300 ± 700 kPa (2510 ± 100 psi) |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Power Train System
Reference: Refer to Testing & Adjusting, UENR3849, "Machine Systems" for more detail on the following test.
Torque Converter Impeller Clutch Pressure - Test
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Table 26
Status(1) |
Description |
Specification |
Actual |
Comments |
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Lockup Clutch Pressure at Pressure Tap (A) |
2550 ± 140 kPa (370 ± 20 psi)(2) |
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Torque Converter Inlet Pressure at Pressure Tap (C) |
930 kPa (135 psi) |
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Impeller Clutch Pressure at Pressure Tap (D) |
1950 kPa (285 psi)(3) |
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Maximum Torque Converter Outlet at Pressure Tap (G) |
550 kPa (80 psi)(4) |
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Minimum Torque Converter Outlet at Pressure Tap (G) |
415 kPa (60 psi) ***#i05833736/d28266e4125*** |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
(2) |
Pressure is less than 170 kPa (25 psi) when the solenoid is not activated. |
(3) |
Pressure with the left brake pedal fully depressed is 220 ± 150 kPa (32 ± 22 psi). |
(4) |
These pressures are for a machine in third speed, with activated brakes, with installed axle shafts, and with the converter in a stall condition.) |
Torque Converter Stall - Test
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Table 27
Status(1) |
Description |
Specification |
Actual |
Comments |
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Torque Converter Stall Speed |
1990 +10 - 65 rpm |
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Torque Convertor Double Stall Speed |
1428 ± 100 rpm |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Torque Converter Lockup Clutch Pressure - Test
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Table 28
Status(1) |
Description |
Specification |
Actual |
Comments |
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Lockup Clutch Pressure at Pressure Tap (A) |
2550 ± 140 kPa (370 ± 20 psi)(2) |
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Torque Converter Inlet Pressure at Pressure Tap (C) |
930 kPa (135 psi) |
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Impeller Clutch Pressure at Pressure Tap (D) |
2500 ± 140 kPa (370 ± 20 psi)(3) |
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Maximum Torque Converter Outlet at Pressure Tap (G) |
550 kPa (80 psi)(4) |
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Minimum Torque Converter Outlet at Pressure Tap (G) |
415 kPa (60 psi) ***#i05833736/d28266e4460*** |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
(2) |
Pressure is less than 170 kPa (25 psi) when the solenoid is not activated. |
(3) |
Pressure with the left brake pedal fully depressed is 130 kPa (19 psi) minimum and 400 kPa (58 psi) maximum. |
(4) |
These pressures are for a machine in third speed, with activated brakes, with installed axle shafts, and with the converter in a stall condition.) |
Transmission Pressures - Test and Adjust
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Table 29
Status(1) |
Description |
Specification |
Actual |
Comments |
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Speed Clutch Initial Pressure (P1) at Pressure Tap (F) at LOW IDLE |
530 ± 20 kPa (76 ± 3 psi) Maximum |
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Speed Clutch Pressure (P1) at Pressure Tap (F) at HIGH IDLE |
2800 ± 140 kPa (406 ± 20 psi) |
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Speed Clutch Pressure (P1) at Pressure Tap (F) at LOW IDLE |
must not be more than 350 kPa (50 psi) below the pressure at high idle |
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Direction Clutch Pressure (P2) at Pressure Tap (J) |
380 ± 35 kPa (55 ± 5 psi) lower than the speed clutch pressure at pressure tap (F) |
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Transmission Lubrication Oil Pressure at HIGH IDLE |
135 kPa (20 psi) minimum |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
S·O·S Samples
Reference: Refer to Operation and Maintenance Manual, SEBU9121, "Maintenance Interval Schedule" for more detail on performing S.O.S samples.
Engine Oil Sample
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Table 30
Status(1) |
Description |
Obtain |
Comments |
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Engine Oil Sample |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Engine Coolant Sample
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Table 31
Status(1) |
Description |
Obtain |
Comments |
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Engine Coolant Sample |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Hydraulic Oil Sample
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Table 32
Status(1) |
Description |
Obtain |
Comments |
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Hydraulic Oil Sample |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Differential & Final Drive Oil Samples (Inboard Final Drives)
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Table 33
Status(1) |
Description |
Obtain |
Comments |
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Front Differential & Final Drive Oil Sample |
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Rear Differential & Final Drive Oil Sample |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Differential & Final Drive Oil Samples (Outboard Final Drives)
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Table 34
Status(1) |
Description |
Obtain |
Comments |
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Front Differential Oil Sample |
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Rear Differential Oil Sample |
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Left Front Final Drive Oil Sample |
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Right Front Final Drive Oil Sample |
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Left Rear Final Drive Oil Sample |
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Right Rear Final Drive Oil Sample |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |
Transmission/Torque Converter Oil Sample
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Table 35
Status(1) |
Description |
Obtain |
Comments |
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Transmission/Torque Converter Oil Sample |
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Show/hide table
(1) |
N = Normal, M = Monitor, A = Action |