725C and 725C2 Articulated Truck TA2 Technical Inspection {0372, 1000, 7000, 753T, 7565} Caterpillar

Articulated Truck

725C (S/N: LFB1-UP; TFB1-UP)

725C2 (S/N: 2T31-UP; 2L61-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.

Creating an Electronic Copy

Use the following procedure to create an editable electronic copy from SIS Web.

1. Click format to print.

2. Save the document as an HTML format.

3. Open the document with Microsoft Word.

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 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, KENR9888, "Electric 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)
	Check Freezing Point of Engine Coolant
	Conditioner Test of Engine Coolant			.
	Check Belt Tension	For used belts - 378 ± 44 N (85 ± 10 lb) For new belts - 801 ± 44 N (180 ± 10 lb)
	Difference between the Upper and Lower Radiator Tank Temperatures

(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
	Engine Speed-Check	2000 rpm
	No Load High Idle	2150 rpm
	No Load Low Idle	700 rpm
	Fuel Pressure	800 kPa (116 psi)
	Fuel Pressure at Low Idle	690 to 724 kPa (100 to 105 psi)
	Fuel Pressure at High Idle	586 kPa (85 psi)

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

Lubrication System

Table 4

Status(1)	Description	Specification	Actual	Comments
	Engine Oil Pressure at Low Idle	152 kPa (22 psi)
	Engine Oil Pressure at High Idle	310 kPa (45 psi)

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

Basic Engine

Table 5

Status(1)	Description	Specification	Actual	Comments
	Cylinder Cutout Test			Cat® Electronic Technician (Cat ET) Service Tool
	Engine Crankcase Blowby Pressure

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

Air Inlet and Exhaust System

Table 6

Status(1)	Description	Specification	Actual	Comments
	Torque Converter Stall Test (From Power Train T&A
	Boost Pressure (Adjusted Boost Pressure From TMI
	Engine Speed (From Power Train T&A
	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)	-

(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, UENR2381, "Machine Systems" for more detail on the following test.

Operational Checks

Table 7

Status(1)	Description	Specification	Actual	Comments
	Raise	No More Than 10 Seconds
	Lower	12 Seconds

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

Brake Performance Checks

Reference: Refer to Testing & Adjusting, UENR2381, "Machine Systems" for more detail on the following test.

Table 8

Status(1)	Description	Specification	Actual	Comments
	Service Brake Check (Test from OMM)
	Parking Brake Check (Test from OMM)

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

Steering Performance Checks

Reference: Refer to Testing & Adjusting, UENR2381, "Machine Systems" for more detail on the following test.

Electric Drive Pump (Secondary Steering) - Check

Table 9

Status(1)	Description	Specification	Actual	Comments
	Maximum Pressure	20675 ± 1375 kPa (3000 ± 200 psi)

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

Machine Hydraulic Systems

Reference: Refer to Testing & Adjusting, UENR2381, "Machine Systems" for more detail on the following test.

Hoist & Body and Ejector Hydraulic System

Pressure Reducing Valve (Hoist Pilot Pressure) - Test and Adjust

Table 10

Status(1)	Description	Specification	Actual	Comments
	Hoist Pilot Pressure	4480 ± 1725 kPa (650 ± 250 psi)

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

Steering System

Piston Pump (Steering, Hoist) - Test and Adjust

Table 11

Status(1)	Description	Specification	Actual	Comments
	Hoist System Pressure	20700 ± 700 kPa (3000 ± 100 psi)
	Steering System Pressure	20700 ± 700 kPa (3000 ± 100 psi)
	Margin Pressure	2200 ± 350 kPa (320 ± 50 psi)
	Standby Pressure	4550 ± 450 kPa (660 ± 65 psi)

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

Fan Drive System

Fan Drive System - Test for 725C

Table 12

Status(1)	Description	Specification	Actual	Comments
	Max Fan Speed (High Idle)	1400 ± 100 rpm
	Min Fan Speed (Low Idle)	600 ± 100 rpm

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

Radiator Fan - Fan Speed Test for 725C2

Table 13

Status(1)	Description	Specification	Actual	Comments
	Fan Speed (High Idle)	1350 ± 50 rpm
	Fan Speed (Low Idle)	550 ± 50 rpm

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

ATAAC Fan - Fan Speed Test for 725C2

Table 14

Status(1)	Description	Specification	Actual	Comments
	Fan Speed (High Idle)	2190 ± 55 rpm
	Fan Speed (Low Idle)	705 ± 55 rpm

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

Braking System

Piston Pump (Brake, Hoist, Fan) - Test and Adjust

Table 15

Status(1)	Description	Specification	Actual	Comments
	System Pressure	20700 ± 700 kPa (3000 ± 100 psi)
	Margin Pressure	2200 ± 350 kPa (320 ± 50 psi)
	Standby Pressure	2750 ± 700 kPa (400 ± 100 psi)

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

Release Pressure for Parking Brake - Test for 725C

Table 16

Status(1)	Description	Specification	Actual	Comments
	Release Pressure	17250 ± 4150 kPa (2500 ± 600 psi)

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

Release Pressure for Parking Brake - Test for 725C2

Table 17

Status(1)	Description	Specification	Actual	Comments
	Release Pressure	17926.4 ± 2758 kPa (2600 ± 400 psi)

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

Brake System Charging Pressure - Check for 725C

Table 18

Status(1)	Description	Specification	Actual	Comments
	Brake Charging System Cut Out Pressure	18000 ± 345 kPa (2600 ± 50 psi)
	Brake Charging System Cut In Pressure	15350 ± 500 kPa (2225 ± 75 psi)

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

Brake System Charging Pressure - Check for 725C2

Table 19

Status(1)	Description	Specification	Actual	Comments
	Brake Charging System Cut Out Pressure	18002 ± 344.7 kPa (2611 ± 50 psi)
	Brake Charging System Cut In Pressure	16023.4 ± 344.7 kPa (2324 ± 50 psi)

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

Brake Accumulator (Parking) - Test and Charge

Table 20

Status(1)	Description	Specification	Actual	Comments
	Precharge Pressure at 21° C (70° F)	9600 ± 170 kPa (1400 ± 25 psi)

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

Brake Accumulator (Service) - Test and Charge

Table 21

Status(1)	Description	Specification	Actual	Comments
	Precharge Pressure at 21° C (70° F)	8000 ± 200 kPa (1160 ± 30 psi)

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

Brake Line Pressure for Front Axle - Test for 725C

Table 22

Status(1)	Description	Specification	Actual	Comments
	Brake Line Pressure	11000 ± 700 kPa (1600 ± 100 psi)

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

Brake Line Pressure for Center and Rear Axle - Test for 725C

Table 23

Status(1)	Description	Specification	Actual	Comments
	Brake Line Pressure	10850 ± 700 kPa (1575 ± 100 psi)

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

Brake Line Pressure - Test for 725C2

Table 24

Status(1)	Description	Specification	Actual	Comments
	Brake Line Pressure	31847 ± 1275.5 kPa (4619 ± 185 psi)

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

Power Train System

Reference: Refer to Testing & Adjusting, UENR2381, "Machine Systems" for more detail on the following test.

Power Train Pressures

Table 25

Status(1)	Description	Specification	Actual	Comments
	Transmission Pump Pressure (Low Idle)	1655 ± 140 kPa (240 ± 20 psi)
	Transmission Pump Pressure (High Idle)	1790 ± 140 kPa (260 ± 20 psi)
	Transmission Lubrication Pressure (Low Idle)	21 ± 14 kPa (3 ± 2 psi)
	Transmission Lubrication Pressure (High Idle)	160 ± 35 kPa (23 ± 5 psi)
	Torque Converter Lockup Clutch Pressure (Low Idle)	1655 ± 138 kPa (240 ± 20 psi)
	Torque Converter Lockup Clutch Pressure (High Idle)	1790 ± 138 kPa (260 ± 20 psi)
	Transmission Hydraulic Control Relief Pressure (Low Idle)	1655 ± 140 kPa (240 ± 20 psi)
	Transmission Hydraulic Control Relief Pressure (High Idle)	1790 ± 140 kPa (260 ± 20 psi)
	Torque Converter Outlet And Oil Cooler Inlet Relief Pressure (Low Idle)	35 ± 14 kPa (5 ± 2 psi)
	Torque Converter Outlet And Oil Cooler Inlet Relief Pressure (High Idle)	207 ± 35 kPa (30 ± 5 psi)
	Torque Converter Inlet Relief Pressure (Low Idle)	125 ± 35 kPa (18 ± 5 psi)
	Torque Converter Inlet Relief Pressure (High Idle)	485 ± 35 kPa (70 ± 5 psi)

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

S·O·S Samples

Reference: Refer to Operation and Maintenance Manual, SEBU8786, "Maintenance Interval Schedule" for more detail on the following test.

Engine Oil Sample

Table 26

Status(1)	Description	Obtain	Comments
	Engine Oil Sample

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

Engine Coolant Sample (Level II)

Table 27

Status(1)	Description	Obtain	Comments
	Engine Coolant Sample

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

Hoist System and Brake System Oil Sample

Table 28

Status(1)	Description	Obtain	Comments
	Hoist System and Brake System Oil Sample

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

Steering System Oil Sample

Table 29

Status(1)	Description	Obtain	Comments
	Steering System Oil Sample

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

Differential & Final Drive Oil Samples

Table 30

Status(1)	Description	Obtain	Comments
	Front Axle Housing Oil Sample
	Center Axle Housing Oil Sample
	Rear Axle Housing Oil Sample
	Left Front Final Drive Oil Sample
	Right Front Final Drive Oil Sample
	Left Center Final Drive Oil Sample
	Right Center Final Drive Oil Sample
	Left Rear Final Drive Oil Sample
	Right Rear Final Drive Oil Sample

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

Torque Converter and Transmission Oil Sample

Table 31

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

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

Transfer Gear Oil Sample

Table 32

Status(1)	Description	Obtain	Comments
	Transfer Gear Oil Sample

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