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

950GC Wheel Loader TA2 Technical Inspection {0372, 1000, 7000, 753T, 7565}

Usage:

Wheel Loader: 950 GC (S/N: M5T1-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

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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).	Refer to Operation and Maintenance Manual, SEBU9340, "Battery and Battery Cable - Clean/Inspect/Replace".
Battery Test	12 VDC	Refer to Testing and Adjusting, UENR4467, "Battery - Test".
Charging System Test		Refer to Testing and Adjusting, UENR4467, "Charging System - Test"
Electric Starting System Test		Refer to Testing and Adjusting, UENR4467, "Electric System - Test"

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

Engine

Cooling System

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Table 2
Description	Specification	Comments
Radiator Pressure Relief (Radiator Cap)⁽²⁾		Use 9S-8140 Pressurizing Pump to test the radiator pressure cap. 20 kPa (3 psi) more than the pressure marked on the cap.
Freezing Point of Engine Coolant
Conditioner Test of Engine Coolant
Belt Tension	535 N (120 lb) for new belts. 355 N (80 lb) for used belts.	Auto Adjust Belt Tensioner
Difference between the Upper and Lower Radiator Tank Temperatures

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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 Pressure of the Low-Pressure Fuel System at Idle Speed	150 kPa (22 psi)
	Maximum Fuel Pressure of the High-Pressure Fuel System	190 MPa (27557 psi)

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

Lubrication System

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Table 4
Status⁽¹⁾	Description	Specification	Actual	Comments
	Minimum Oil Pressure at the Maximum Engine Speed and at Normal Operating Temperature	315 kPa (46 psi)

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

Basic Engine

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Table 5
Description	Specification	Comments
Engine Speed at Low Idle	825 ± 30 RPM
Engine Speed at High Idle	2390 ± 60 RPM
Torque Converter Stall Test Engine RPM	2090 +/- 50 rpm
Cylinder Cutout Test		Caterpillar Electronic Technician

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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
	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⁾

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⁽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, M0073086 for more detail on the following test.

Implement Cycle Time-Check

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Table 7
Status⁽¹⁾	Description	Specification	Actual	Comments
	Raise Cycle Time 950 GC	6.0 +/- 0.5 sec
	Lower Cycle Time 950 GC	4.0 +/- 0.5 sec
	Float Cycle Time 950 GC	2.5 +/ - 0.5 sec
	Dump Cycle Time 950 GC	2.0 +/ - 0.5 sec
	Rack Back Cycle Time 950 GC	2.7 + /- 0.5 sec

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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
	Oil Temperature	62° ± 8°C (112° ± 14 °F) - 62° ± 8°C (112° ± 14 °F)
	Lift Cylinder	50.0 mm (1.97 inch) in 5 minutes
	Tilt Cylinder	20.0 mm (0.79 inch) in 5 minutes

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

Parking Brake Actuator - Adjust

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Table 9
Status⁽¹⁾	Description	Specification	Actual	Comments
	Pressurized Actuator	11380 to 14830 kPa (1651 to 2151 psi)
	Maximum Pressurized Actuator⁽²⁾	25338 kPa (3675 psi)

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⁽¹⁾	N = Normal, M = Monitor, A = Action
⁽²⁾	Do Not Exceed

Brake Performance Checks

Reference: Refer to Testing & Adjusting, M0073073 for more detail on the following test.

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Table 10
Status⁽¹⁾	Description	Specification	Actual	Comments
	Brake Accumulator - Test (Test from OMM)	6890 ± 340 kPa (999 ± 49 psi)
	Service Brake Valve⁽²⁾	4690 ± 350 kPa (680 ± 51 psi)
	Parking Brake Holding Ability Test- Test (Test from OMM)	Third Gear Forward High Idle 2390 ± 60 RPM

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⁽¹⁾	N = Normal, M = Monitor, A = Action
⁽²⁾	For both Front and Rear Brakes

Steering Performance Checks

Reference: Refer to Testing & Adjusting, M0073077 for more detail on the following test.

Steering Time - Check

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Table 11
Status⁽¹⁾	Description	Specification	Actual	Comments
	Steering Time (High Idle)	3.96 ± 0.5 seconds
	Steering Time (High Idle)	4.65 ± 0.5 seconds

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

Hydraulic System

Reference: Refer to Testing & Adjusting, M0073086, "Hydraulic System" for more detail on the following test.

Piston Pump (Implement)

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Table 12
Status⁽¹⁾	Description	Specification	Actual	Comments
	Discharge Pressure	27900 ± 700 kPa (4047 ± 102 psi)
	Load Sense Pressure	25800 ± 500 kPa (3742 ± 73 psi)
	Margin Pressure	2100 ± 100 kPa (305 ± 15 psi)

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

Load Sensing Relief Valve Pressure

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Table 13
Status⁽¹⁾	Description	Specification	Actual	Comments
	Pressure setting for load sensing signal relief valve	25800 ± 500 kPa (3742 ± 73 psi)

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

Pilot Oil Accumulator (Dead Engine, Lift Arm Lower) - Test

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Table 14
Status⁽¹⁾	Description	Specification	Actual	Comments
	Accumulator Precharge	1000 kPa (145 psi)

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

Ride Control Accumulator - Test

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Table 15
Status⁽¹⁾	Description	Specification	Actual	Comments
	Oil Temperature	21° C (70° F)
	Accumulator Precharge High Pressure	35000 kPa (5076 psi)
	Accumulator Precharge Low Pressure	2300 kPa (334 psi)

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

Ride Control Activation Speed

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Table 16
Status⁽¹⁾	Description	Specification	Actual	Comments
	Engagement Speed	1.6 to 32.1 km/h (1.0 to 20.0 mph)
	Factory Setting Activation Speed	9.7 km/h (6.0 mph)

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

Power Train System

Reference: Refer to Testing & Adjusting, UENR3126, "Power Train System" for more detail on the following test.

Tire Pressure

The tire inflation pressure for machines that are shipped from the factory is suitable for shipping only. Always obtain the proper tire inflation pressures for your machine from the tire supplier before placing the machine into operation. The recommended tire inflation pressures for the front tires and for the rear tires will vary for each application.

Proper tire inflation pressure and maintenance of the tire inflation pressure is critical for optimum tire life. The tire inflation pressure should always be obtained from the tire supplier due to changes in the technology of tires, equipment, and job applications.

Reference: Refer to the latest edition of Special Publication, "Caterpillar Performance Handbook" for general information on tire inflation pressure.

Transmission Pressures

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Table 17
Table for Transmission Pressures
Pressure	Specification	Actual Pressure
(A) P2 pressure (high idle)	1930 ± 170 kPa (280 ± 25 psi)
(A) P2 pressure (low idle)	1930 ± 170 kPa (280 ± 25 psi)
(B) P1 pressure (high idle)	2250 ± 240 kPa (326 ± 35 psi)
(B) P1 pressure (low idle)	2250 ± 240 kPa (326 ± 35 psi)
(C) P3 pressure (high idle)	790 ± 70 kPa (115 ± 10 psi)
(D) Transmission lubrication pressure (high idle)	265 ± 50 kPa (38 ± 7 psi)
(F) Torque converter outlet pressure	220 ± 70 kPa (32 ± 10 psi)
(G) Transmission oil pump pressure	2750 ± 240 kPa (399 ± 35 psi)

Location of Pressure Taps

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Illustration 1	g03500268
Transmission Pressure Taps (A) Direction clutch (P2). (B) Speed clutch (P1). (C) Torque converter inlet (P3).

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Illustration 2	g00283697
Inlet for Transmission Lubrication Oil

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Illustration 3	g00283698
Inlet for Transmission Lubrication Oil (D) 6V-7946 Plate Assembly. (E) 1V-4249 Bolt.

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Illustration 4	g03500462
Torque Converter Outlet (F) Torque converter outlet pressure tap.

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Illustration 5	g00283707
Transmission Oil Filter (G) Pressure tap for the transmission oil pump.

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Illustration 6	g03646777

Steering System

Reference: Refer to Testing & Adjusting, M0073077, "Steering System" for more detail on the following test.

Piston Pump (Steering) High-Pressure Stall - Test

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Table 18
Status⁽¹⁾	Description	Specification	Actual	Comments
	Piston Pump (Steering) High-Pressure Stall - Test	20700 ± 700 kPa (3002 ± 102 psi)

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

Piston Pump (Steering) Margin Pressure - Test

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Table 19
Status⁽¹⁾	Description	Specification	Actual	Comments
	Margin Pressure	2400 kPa (348 psi)

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

Piston Pump (Steering) Low Pressure Standby -Test

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Table 20
Status⁽¹⁾	Description	Specification	Actual	Comments
	Low- Pressure Standby (High Idle)	3500 ± 345 kPa (508 ± 50 psi)

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

Brake and Hydraulic Fan System

Reference: Refer to Testing & Adjusting, M0073073 for more detail on the following test.

Brake Accumulator Precharging Pressure

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Table 21
950GC Brake Accumulator charging valve pressure
Date	Equipment ID Code
Pump Pressure	Setting	Actual
Cut-In pressure	11720 ± 340 kPa (1700 ± 49 psi)
Cut-Out pressure	14490 ± 340 kPa (2102 ± 49 psi)

Service Brake System Pressure - Test

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Table 22
950GC Service Brake Pressure
Date	Equipment ID Code
Pump Pressure	Setting	Actual
Service Brake Valve	4690 ± 350 kPa (680 ± 51 psi)

Service Brake Wear Indicator

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Table 23
Status⁽¹⁾	Description	Specification	Actual	Comments
	Right Front Indicator Depth	1.50 mm (0.060 inch)
	Left Front Indicator Depth	1.50 mm (0.060 inch)
	Right Rear Indicator Depth	1.50 mm (0.060 inch)
	Left Rear Indicator Depth	1.50 mm (0.060 inch)

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

Hydraulic Fan Speed - Test

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Table 24
Status⁽¹⁾	Description	Specification	Actual	Comments
	Max Fan Speed	1400 ± 50 RPM
	Minimum Fan Speed	615 ± 50 RPM
	Maximum (High Ambient)	1550 ± 50 RPM

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

Fan Pump Relief Pressure - Test

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Table 25
Status⁽¹⁾	Description	Specification	Actual	Comments
	Fan Pump Relief Pressure	21000 ± 500 kPa (3046 ± 73 psi)

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

S·O·S Samples

Reference: Refer to Operation and Maintenance Manual, M0067704, "Maintenance Interval Schedule" for more detail on performing S.0.S samples.

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Table 26
Status⁽¹⁾	Description	Obtain		Comments
	Engine Oil Sample
	Engine Coolant Sample (Level II)
	Hydraulic Oil Sample
	Transmission Oil Sample
	Front Right Final Drive Oil Sample
	Front Left Final Drive Oil Sample
	Rear Right Final Drive Oil Sample
	Rear Left Final Drive Oil Sample
	Front Axle/Diff Oil Sample
	Center Axle/Diff Oil Sample
	Rear Axle/Diff Oil Sample
	Transfer Case Oil Sample
	Brake Fluid Oil Sample
	Power Steering Oil Sample