745, 740 GC and 740 Ejector Articulated Truck TA2 Technical Inspection {0372, 0374, 1000, 7000, 753T, 7565} Caterpillar

Articulated Truck

740 EJECTOR (S/N: 3F71-UP; 3T71-UP)

740 GC (S/N: 3F81-UP; 3T81-UP)

745 (S/N: 3F61-UP; 3T61-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.

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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 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	28 ± 1 VDC		Refer to Testing and Adjusting, SENR9832, "Charging Charging System - Test".
	Electric Starting System Test	12 to 16 VDC at −23° C (−10° F) to −7° C (19° F)
		14 to 18 VDC at −7° C (19° F) to 10° C (50° F)
		16 to 24 VDC 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 - 400 N (90 lb) For new belts - 534 N (120 lb)

(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
	High Idle	641 kPa (93 psi)
	Low Idle	538 kPa (78 psi)

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

Lubrication System

Table 4

Status(1)	Description	Specification	Actual	Comments
	Engine Oil Pressure	100 kPa (15 psi) to 500 kPa (72 psi)

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

Basic Engine

Table 5

Status(1)	Description	Specification	Actual	Comments
	Engine Speed at Low Idle	600 ± 10 rpm
	Engine Speed at High Idle	2100 ± 10 rpm
	Torque Converter Stall Test Engine RPM	1300 ± 10 rpm
	Cylinder Cutout Test			Cat® Electronic Technician (Cat ET) Service Tool

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

Air Inlet and Exhaust System

Table 6

Status(1)	Description	Specification	Actual	Comments
	Torque Converter Stall Engine Speed (From Power Train T&A	1200 ± 10 rpm
	Adjusted Boost Pressure	139 ± 21 kPa (41 ± 6.2 inch mercury)
	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.

Performance Checks

Reference: Refer to Testing & Adjusting, M0073366, "745 & 740 GC Articulated Truck Systems" and Testing & Adjusting, M0073370, "740 Ejector Articulated Truck Systems" for more detail on the following test.

Hoist and Ejector Performance Checks

Hoist Cycle Time - Check for 745 & 740 GC

Table 7

Status(1)	Description	Specification	Actual	Comments
	Raise	12 Seconds
	Lower	8 Seconds

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

Ejector Cycle Time - Check for 740 Ejector

Table 8

Status(1)	Description	Specification	Actual	Comments
	Eject Time	19 Seconds
	Retract Time	22 Seconds

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

Brake Performance Checks

Reference: Refer to Operation and Maintenance Manual, M0069236, "Braking System - Test" and Operation and Maintenance Manual, M0072862, "Braking System - Test" for more detail on the following test.

Table 9

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

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

Steering Performance Checks

Table 10

Status(1)	Description	Specification	Actual	Comments
	Left Steering Time	4.5 ± 1 seconds
	Right Steering Time	4.5 ± 1 seconds

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

Machine Hydraulic Systems

Reference: Refer to Testing & Adjusting, M0073366, "745 & 740 GC Articulated Truck Systems" and Testing & Adjusting, M0073370, "740 Ejector Articulated Truck Systems" for more detail on the following test.

Hoist and Ejector Hydraulic System

Hoist Pilot Pressure - Test and Adjust for 745 & 740 GC

Table 11

Status(1)	Description	Specification	Actual	Comments
	Hoist Pilot Pressure	3450 ± 345 kPa (500 ± 50 psi)

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

Ejector System Pilot Pressure - Test and Adjust for 740 Ejector

Table 12

Status(1)	Description	Specification	Actual	Comments
	Ejector Pilot Pressure -	3450 ± 345 kPa (500 ± 50 psi)

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

Steering System

Piston Pump (Steering, Hoist) - Test and Adjust for 745 & 740 GC

Table 13

Status(1)	Description	Specification	Actual	Comments
	Steering System Pressure (TPST)	22580 ± 1200 kPa (3275 ± 175 psi)
	Margin Pressure	2200 ± 350 kPa (319 ± 51 psi)
	Standby Pressure (TP2)	3964 ± 1200 kPa (575 ± 175 psi)
	High Pressure Cutoff (TP2)	25500 ± 700 kPa (3700 ± 100 psi)
	Hoist System Pressure (TPH)	25500 ± 700 kPa (3700 ± 100 psi)

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

Piston Pump (Steering, Ejector) - Test and Adjust for 740 Ejector

Table 14

Status(1)	Description	Specification	Actual	Comments
	Steering System Pressure (TPST)	22580 ± 1200 kPa (3275 ± 175 psi)
	Margin Pressure	2200 ± 350 kPa (319 ± 51 psi)
	Standby Pressure (TP2)	3964 ± 1200 kPa (575 ± 175 psi)
	High Pressure Cutoff (TP2)	25500 ± 700 kPa (3700 ± 100 psi)
	Ejector System Pressure (TPH)	20339 ± 1034 kPa (2950 ± 150 psi)

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

Electric Drive Pump (Secondary Steering) - Test

Table 15

Status(1)	Description	Specification	Actual	Comments
	Maximum Pressure (TPST)	19000 ± 2750 kPa (2800 ± 400 psi)

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

Fan Drive System

Radiator Fan - Fan Speed Test for 745, 740 GC, and 740 Ejector

Table 16

Status(1)	Description	Specification	Actual	Comments
	Fan Speed (High Idle)	1900 ± 50 rpm
	Fan Speed (Low Idle)	500 ± 50 rpm

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

Braking System

Piston Pump (Brake, Hoist, Fan) - Test and Adjust for 745 & 740 GC

Table 17

Status(1)	Description	Specification	Actual	Comments
	System Pressure	20700 ± 700 kPa (3000 ± 100 psi)
	Margin Pressure	2200 ± 350 kPa (320 ± 50 psi)
	Standby Pressure	2758 ± 689 kPa (400 ± 100 psi)

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

Piston Pump (Brake, Ejector, Fan) - Test and Adjust for 740 Ejector

Table 18

Status(1)	Description	Specification	Actual	Comments
	System Pressure	20700 ± 700 kPa (3000 ± 100 psi)
	Margin Pressure	2200 ± 350 kPa (320 ± 50 psi)
	Standby Pressure	2758 ± 689 kPa (400 ± 100 psi)

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

Release Pressure for Parking Brake - Test for 745, 740 GC, and 740 Ejector

Table 19

Status(1)	Description	Specification	Actual	Comments
	Release Pressure	17926 ± 2758 kPa (2600 ± 400 psi)

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

Brake System Charging Pressure - Check for 745, 740 GC and 740 Ejector

Table 20

Status(1)	Description	Specification	Actual	Comments
	Brake Charging System Cut Out Pressure	17926 ± 345 kPa (2600 ± 50 psi)
	Brake Charging System Cut In Pressure	15341 ± 517 kPa (2225 ± 75 psi)

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

Brake Accumulator (Parking) - Test and Charge for 745, 740 GC and 740 Ejector

Table 21

Status(1)	Description	Specification	Actual	Comments
	Precharge Pressure at 21° C (70° F)	9600 ± 172 kPa (1393 ± 25 psi)

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

Brake Accumulator (Service) - Test and Charge for 745, 740 GC and 740 Ejector

Table 22

Status(1)	Description	Specification	Actual	Comments
	Front Brake Accumulator Precharge Pressure at 21° C (70° F)	8000 ± 200 kPa (1160 ± 30 psi)
	Rear Brake Accumulator 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 745, 740 GC and 740 Ejector

Table 23

Status(1)	Description	Specification	Actual	Comments
	Brake Line Pressure (High Limit)	9066 kPa (1315 psi)
	Brake Line Pressure (Low Limit)	7860 kPa (1140 psi)

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

Brake Line Pressure for Center and Rear Axle - Test for 745, 740 GC and 740 Ejector

Table 24

Status(1)	Description	Specification	Actual	Comments
	Brake Line Pressure (High Limit)	9066 kPa (1315 psi)
	Brake Line Pressure (Low Limit)	7860 kPa (1140 psi)

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

Power Train System

Reference: Refer to Testing & Adjusting, M0073366, "745 & 740 GC Articulated Truck Systems" and Testing & Adjusting, M0073370, "740 Ejector Articulated Truck Systems" for more detail on the following test.

Power Train Pressures

Table 25

Status(1)	Description	Specification	Actual	Comments
	Transmission Pump Pressure (Low Idle)	3300 ± 300 kPa (479 ± 43 psi)
	Transmission Pump Pressure (Elevated Idle)	3800 ± 300 kPa (551 ± 43 psi)
	Transmission Lubrication Pressure (Low Idle)	135 ± 35 kPa (20 ± 5 psi)
	Transmission Lubrication Pressure (High Idle)	215 ± 35 kPa (31 ± 5 psi)
	Torque Converter Lockup Clutch Pressure (High Idle)	1790 ± 138 kPa (260 ± 20 psi)
	Transmission Hydraulic Control Relief Pressure (High Idle)	3160 ± 140 kPa (460 ± 20 psi)
	Torque Converter Outlet Relief Valve Pressure (Low Idle)	190 ± 70 kPa (28 ± 10 psi)
	Torque Converter Outlet Relief Valve Pressure (High Idle)	500 ± 70 kPa (73 ± 10 psi)
	Torque Converter Inlet Relief Valve Pressure (Low Idle)	245 ± 140 kPa (36 ± 20 psi)
	Torque Converter Inlet Relief Valve Pressure (High Idle)	860 ± 140 kPa (125 ± 20 psi)
	Clutch 1 Pressure (High Idle)	1100 ± 140 kPa (160 ± 20 psi)
		3000 ± 140 kPa (435 ± 20 psi) (Reverse)
	Clutch 2 Pressure (High Idle)	3000 ± 140 kPa (435 ± 20 psi) (Reverse)
	Clutch 3 Pressure (High Idle)
	Clutch 4 Pressure (High Idle)
	Clutch 5 Pressure (High Idle)
	Clutch 6 Pressure (High Idle)	2140 ± 140 kPa (310 ± 20 psi)Warmup Mode 2800 ± 140 kPa (406 ± 20 psi)
	Interaxle Differential Lock Pressure - Electronic Main Relief Valve (ERMV)	3200 ± 300 kPa (465 ± 44 psi)
	Interaxle Differential Lock Clutch Pressure	2900 ± 300 kPa (420 ± 44 psi)
	Front Cross Axle Differential Lock Pressure	4000 ± 400 kPa (580 ± 58 psi)
	Center Cross Axle Differential Lock Pressure	4000 ± 400 kPa (580 ± 58 psi)
	Rear Cross Axle Differential Lock Pressure	4000 ± 400 kPa (580 ± 58 psi)
	Cross Axle Differential Supply Pressure (TPDL)	6000 ± 500 kPa (870 ± 73 psi)

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

S·O·S Samples

Reference: Refer to Operation and Maintenance Manual, M0069236, "Maintenance Interval Schedule" and Operation and Maintenance Manual, M0072862, "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 / Ejector System and Brake System Oil Sample

Table 28

Status(1)	Description	Obtain	Comments
	Hoist / Ejector 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