950G Series II Wheel Loader TA2 Technical Inspection {0372, 1000, 7000, 753T, 7565} Caterpillar

Wheel Loader

950G Series II (S/N: BAA1-UP; AYB1-UP; AYD1-UP; AYL1-UP; AXR1-UP; AYS1-UP; AXX1-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	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, SENR9580, "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)

(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-Tension		Belt for the axle oil cooler pump (if equipped) use a BT-33-97 boroughs gauge to check the tension of the belt. The tension of a used belt with more than 30 minutes of operation at rated speed should be 400 ± 44 N (90 ± 10 lb).
	Difference between the Upper and Lower Radiator Tank Temperatures	5 + 10 - 0 °C (41 + 50 - 32 °F)
	Jacket Water Inlet Temperature from Cooling System	89° ± 3°C (192° ± 5°F)

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

Fuel System

Table 3

Status(1)	Description	Specification	Actual	Comments
	Fuel Pressure at HIGH IDLE	540 ± 180 kPa (78 ± 26 psi)

(1)	N = Normal, M = Monitor, A = Action

Lubrication System

Table 4

Status(1)	Description	Specification	Actual	Comments
	Engine Oil Pressure at LOW IDLE	190 + 410 - 130 kPa (28 + 59 - 19 psi)
	Engine Oil Pressure at HIGH IDLE	330 + 270 - 150 kPa (48 + 39 - 22 psi)

(1)	N = Normal, M = Monitor, A = Action

Basic Engine

Table 5

Status(1)	Description	Specification	Actual	Comments
	Engine Speed at HIGH IDLE	2340 ± 40 rpm
	Engine Speed at LOW IDLE	825 ± 10 rpm

(1)	N = Normal, M = Monitor, A = Action

Air Inlet and Exhaust System

Table 6

Status(1)	Description	Specification	Actual	Comments
	Torque Converter Oil Temperature	76° to 112°C (168° to 230°F)
	Torque Converter Stall Test Boost Pressure	132.0 ± 19.8 kPa (19.1 ± 2.9 psi)
	Torque Converter Stall Speeds	2110 ± 65 RPM
	Double Stall Speeds	1620 ± 100 RPM
	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

Reference: Refer to Testing & Adjusting, RENR4320, "Hydraulic System" for more detail on the following test.

Implement Cycle Time - Check

Table 7

Status(1)	Description	Specification	Actual	Comments
	Implement Cycle Time for lift control lever at RAISE position	6.3 ± 0.5 seconds
	Implement Cycle Time for lift control lever at LOWER position	4.8 ± 0.5 seconds
	Implement Cycle Time for lift control lever at TILTBACK position	2.7 ± 0.5 seconds
	Implement Cycle Time for lift control lever at DUMP position	2.3 ± 0.5 seconds

(1)	N = Normal, M = Monitor, A = Action

Pump Performance (Implement) - Test

Table 8

Status(1)	Description	Specification	Actual	Comments
	Lift with empty work tool	6.3 ± 0.5 seconds
	Dump	2.3 ± 0.5 seconds

(1)	N = Normal, M = Monitor, A = Action

Lift and Tilt Cylinder Drift - Check

Lift Cylinder

Table 9

Status(1)	Description	Specification	Actual	Comments
	Maximum Implement Drift in 5.0 minutes at Oil temperature of 38° to 49°C (100° to 121°F)	13.0 mm (0.51 inch)
	Maximum Implement Drift in 2.7 minutes at Oil temperature of 50° to 65°C (122° to 149°F)	13.0 mm (0.51 inch)
	Maximum Implement Drift in 1.7 minutes at Oil temperature of 66° C (150° F) or more	13.0 mm (0.51 inch)

(1)	N = Normal, M = Monitor, A = Action

Tilt Cylinder

Table 10

Status(1)	Description	Specification	Actual	Comments
	Maximum Implement Drift in 5.0 minutes at Oil temperature of 38° to 49°C (100° to 121°F)	19.0 mm (0.75 inch)
	Maximum Implement Drift in 2.7 minutes at Oil temperature of 50° to 65°C (122° to 149°F)	19.0 mm (0.75 inch)
	Maximum Implement Drift in 1.7 minutes at Oil temperature of 66° C (150° F) or more	19.0 mm (0.75 inch)

(1)	N = Normal, M = Monitor, A = Action

Hydraulic System

Reference: Refer to Testing & Adjusting, RENR4320, "Hydraulic System" for more detail on the following test.

Pilot System Pressure - Test

Table 11

Status(1)	Description	Specification	Actual	Comments
	Pilot Pressure (for running engine)	2600 ± 150 kPa (375 ± 20 psi)
	Pilot Pressure (for Nonrunning engine)	1800 ± 150 kPa (260 ± 20 psi)

(1)	N = Normal, M = Monitor, A = Action

Relief Valve (Main) - Test and Adjust

Table 12

Status(1)	Description	Specification	Actual	Comments
	Main Relief Valve Pressure	20700 ± 340 kPa (3000 ± 50 psi)

(1)	N = Normal, M = Monitor, A = Action

Relief Valve (Line) - Test and Adjust

Table 13

Status(1)	Description	Specification	Actual	Comments
	Tilt Rod End Line Relief Valve Pressure (No Auxiliary Function)	22750 ± 400 kPa (3300 ± 60 psi)
	Tilt Rod End Line Relief Valve Pressure (Auxiliary Function)	22750 ± 400 kPa (3300 ± 60 psi)
	Tilt Rod End Line Relief Valve Pressure (Auxiliary Function)	22750 ± 400 kPa (3300 ± 60 psi)
	Tilt Head End Line Relief Valve Pressure (No Auxiliary Function)	22750 ± 400 kPa (3300 ± 60 psi)
	Tilt Head End Line Relief Valve Pressure (Auxiliary Function)	22750 ± 400 kPa (3300 ± 60 psi)
	Tilt Head End Line Relief Valve Pressure (Auxiliary Function)	26000 ± 400 kPa (3770 ± 60 psi)
	Auxiliary Head End Line Relief Valve Pressure (No Auxiliary Function)	-
	Auxiliary Head End Line Relief Valve Pressure (Auxiliary Function)	20700 ± 400 kPa (3000 ± 60 psi)
	Auxiliary Head End Line Relief Valve Pressure (Auxiliary Function)	22750 ± 400 kPa (3300 ± 60 psi)
	Auxiliary Rod End Line Relief Valve Pressure (No Auxiliary Function)	-
	Auxiliary Rod End Line Relief Valve Pressure (Auxiliary Function)	12400 ± 400 kPa (1800 ± 60 psi)
	Auxiliary Rod End Line Relief Valve Pressure (Auxiliary Function)	12400 ± 400 kPa (1800 ± 60 psi)

(1)	N = Normal, M = Monitor, A = Action

Brake and Hydraulic Fan System

Reference: Refer to Testing & Adjusting, RENR4320, "Hydraulic System" and Testing & Adjusting, RENR4317, "Braking System" for more detail on the following test.

Hydraulic Fan Speed - Test and Adjust

Table 14

Status(1)	Description	Specification		Actual	Comments
		Fan Speed	Engine Speed
	Hydraulic Fan Speed at LOW IDLE (The solenoid valve is connected.)	500 + 75 - 25 rpm	825 ± 30 rpm
	Hydraulic Fan Speed at HIGH IDLE (The electrohydraulic valve is connected.)(2)	1260 ± 25 rpm	2340 ± 50 rpm

(1)	N = Normal, M = Monitor, A = Action
(2)	Machines that are equipped with a reversing fan system will also have a fan speed of 1260 ± 25 at high-pressure cutoff.

Pump Performance (Pilot and Braking) - Test

Table 15

Status(1)	Description	Specification	Actual	Comments
	Pump Standby Pressure	4300 ± 200 kPa (625 ± 30 psi)

(1)	N = Normal, M = Monitor, A = Action

Accumulator Charging Valve (Brake) - Test and Adjust

Table 16

Status(1)	Description	Specification	Actual	Comments
	Cut-out Pressure	14500 ± 345 kPa (2100 ± 50 psi)

(1)	N = Normal, M = Monitor, A = Action

Service Braking System Pressure - Test for S/N:AYL1-369

Table 17

Status(1)	Description	Specification	Actual	Comments
	Brake Pressure	6895 ± 345 kPa (1000 ± 50 psi)

(1)	N = Normal, M = Monitor, A = Action

Service Braking System Pressure - Test for S/N:AYL370-UP

Table 18

Status(1)	Description	Specification	Actual	Comments
	Brake Pressure	8620 ± 345 kPa (1250 ± 50 psi)

(1)	N = Normal, M = Monitor, A = Action

Service Brake Wear Indicator (Existing Brake Disc) - Check

Table 19

Status(1)	Description	Specification	Actual	Comments
	Right Front Indicator	See Table 20
	Left Front Indicator	See Table 20
	Right Rear Indicator	See Table 20
	Left Rear Indicator	See Table 20

(1)	N = Normal, M = Monitor, A = Action

Table 20

Disc Thickness Wear Chart
Estimated Percentage of Remaining Brake Disc Life	Amount of the Friction Material that is Worn From the Discs	Oil Groove Depth(1)
100	0.00 mm (.000 inch)	1.05 mm (.041 inch)
80	0.29 mm (.011 inch)	0.90 mm (.036 inch)
60	0.58 mm (.023 inch)	0.76 mm (.030 inch)
40	0.88 mm (.034 inch)	0.61 mm (.024 inch)
20	1.17 mm (.046 inch)	0.47 mm (.018 inch)
0	1.46 mm (.058 inch)	0.32 mm (.013 inch)

(1)	Groove depth is the most critical measurement.

Power Train System

Reference: Refer to Testing & Adjusting, RENR4310, "Power Train" for more detail on the following test.

Transmission Clutch Pressure Test

Table 21

Status(1)	Description	Specification	Actual	Comments
	Number 1 Clutch Pressure at Pressure Tap (A)(2)	2725 ± 70 kPa (395 ± 10 psi)
	Number 2 Clutch Pressure at Pressure Tap (B)(2)	2725 ± 70 kPa (395 ± 10 psi)
	Number 3 Clutch Pressure at Pressure Tap (C)(2)	2725 ± 70 kPa (395 ± 10 psi)
	Number 4 Clutch Pressure at Pressure Tap (D)(2)	2725 ± 70 kPa (395 ± 10 psi)
	Number 5 Clutch Pressure at Pressure Tap (E)(2)	2310 ± 140 kPa (335 ± 20 psi)
	Number 6 Clutch Pressure at Pressure Tap (F)(2)	2725 ± 70 kPa (395 ± 10 psi)

(1)	N = Normal, M = Monitor, A = Action
(2)	Oil pressure at high idle.

Transmission Lubrication Pressure Test

Table 22

Status(1)	Description	Specification	Actual	Comments
	Transmission Lubrication Pressure at Pressure Tap (G)(2)	105 kPa (15 psi) minimum

(1)	N = Normal, M = Monitor, A = Action
(2)	Oil pressure at high idle.

Torque Converter Outlet Pressure Test

Table 23

Status(1)	Description	Specification	Actual	Comments
	Torque Converter Outlet Pressure at Pressure Tap (H)(2)	415 ± 135 kPa (60 ± 20 psi)

(1)	N = Normal, M = Monitor, A = Action
(2)	Oil pressure at high idle.

Transmission Oil Pump Pressure Test

Table 24

Status(1)	Description	Specification	Actual	Comments
	Transmission Oil Pump Pressure at Pressure Tap (K) and (L)(2)	2725 ± 70 kPa (395 ± 10 psi)

(1)	N = Normal, M = Monitor, A = Action
(2)	Oil pressure at high idle.

Torque Converter Inlet Pressure Test

Table 25

Status(1)	Description	Specification	Actual	Comments
	Torque Converter Inlet Pressure at Pressure Tap (M)(2)	900 ± 70 kPa (130 ± 10 psi)

(1)	N = Normal, M = Monitor, A = Action
(2)	Oil pressure at high idle.

Steering System

Reference: Refer to Testing & Adjusting, RENR4314, "Steering System" for more detail on the following test.

Pump Performance (Steering) - Test

Table 26

Status(1)	Description	Specification	Actual	Comments
	Steering Time for Machines with conventional steering at HIGH IDLE	2.7 ± 0.5 seconds
	Steering Time for Machines with command control steering at HIGH IDLE	2.7 ± 0.5 seconds

(1)	N = Normal, M = Monitor, A = Action

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

Table 27

Status(1)	Description	Specification	Actual	Comments
	Steering System Pressure at HIGH IDLE	20000 ± 350 kPa (2900 ± 50 psi)

(1)	N = Normal, M = Monitor, A = Action

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

Table 28

Status(1)	Description	Specification	Actual	Comments
	Piston Pump (Steering) Low Pressure Standby at HIGH IDLE	Less than 3900 kPa (565 psi)

(1)	N = Normal, M = Monitor, A = Action

Piston Pump (Steering) Margin Pressure - Test and Adjust

Table 29

Status(1)	Description	Specification	Actual	Comments
	Margin Pressure at HIGH IDLE	2400 ± 100 kPa (350 ± 15 psi)

(1)	N = Normal, M = Monitor, A = Action

Relief Valve (Pump Backup) - Test and Adjust (HMU Steering)

Table 30

Status(1)	Description	Specification	Actual	Comments
	Back up Relief Valve Pressure at HIGH IDLE	Less than 20000 ± 350 kPa (2900 ± 50 psi)

(1)	N = Normal, M = Monitor, A = Action

Relief Valve (Steering Cylinder Crossover) - Test and Adjust

Table 31

Status(1)	Description	Specification	Actual	Comments
	Steering Cylinder Crossover Relief Valve Pressure	25600 ± 500 kPa (3713.02 ± 72.52 psi)

(1)	N = Normal, M = Monitor, A = Action

Steering Time - Check (HMU Steering)

Table 32

Status(1)	Description	Specification	Actual	Comments
	Steering Time for a full turn from one stop to the other stop at HIGH IDLE	Less than 2.7 ± 0.5 seconds
	Steering Time for a full turn from one stop to the other stop at LOW IDLE	Less than 5.7 ± 0.5 seconds

(1)	N = Normal, M = Monitor, A = Action

S·O·S Samples

Reference: Refer to Operation and Maintenance Manual, SEBU7459, "Maintenance Interval Schedule" for more detail on performing S.O.S samples.

Engine Oil Sample

Table 33

Status(1)	Description	Obtain	Comments
	Engine Oil Sample

(1)	N = Normal, M = Monitor, A = Action

Engine Coolant Sample

Table 34

Status(1)	Description	Obtain	Comments
	Engine Coolant Sample

(1)	N = Normal, M = Monitor, A = Action

Hydraulic Oil Sample

Table 35

Status(1)	Description	Obtain	Comments
	Hydraulic Oil Sample

(1)	N = Normal, M = Monitor, A = Action

Differential & Final Drive Oil Samples (Inboard Final Drives)

Table 36

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 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

(1)	N = Normal, M = Monitor, A = Action

Transmission/Torque Converter Oil Sample

Table 38

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

(1)	N = Normal, M = Monitor, A = Action