M318C Wheeled Excavator TA2 Technical Inspection{0372, 1000, 7000, 753T, 7565} Caterpillar

Excavator:

M318C (S/N: H2D1-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.

Note: Specification values are based on the following machine settings, unless otherwise stated.

• Engine Speed Dial "10"

• HP Mode

• AEC OFF

• A/C OFF

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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, RENR2416, "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)	NA		Refer to System Operation Testing and Adjusting.
	Freezing Point of Engine Coolant	NA		Refer to Operation and Maintenance Manual.
	Belt Tension	13 to 19 mm (0.5 to 0.7 inch)		Measure point midway between pulleys for alternator and fan drive belts with 110 N (25 lb). Air conditioner belt will deflect 7 to 10 mm (0.3 to 0.4 inch) with 98 N (22 lb) force.
	Conditioner Test of Engine Coolant	80° to 84°C (176° to 183°F)		Opening temperature. Fully open temperature of the water temperature regulator is 96° C (205° F).
	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
	Minimum Pressure (2)	26 kPa (3.8 psi)
	Maximum Pressure (2)	35 to 55 kPa (5 to 8 psi)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Crank the engine for ten seconds.

Lubrication System

Table 4

Status (1)	Description	Specification	Actual	Comments
	Engine Oil Pressure at LOW IDLE	150 kPa (22 psi)
	Engine Oil Pressure at HIGH IDLE	280 kPa (41 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Basic Engine

Table 5

"Engine Performance - Test (Engine Speed)"
Status (1)	Description	Specification	Actual	Comments
	Low Idle AEC OFF	-
	Low Idle AEC ON	-
	High Idle No Load	2100 rpm

( 1 )

N = Normal, M = Monitor, A = Action

Air Inlet and Exhaust System

Table 6

Status (1)	Description	Specification	Actual	Comments
	Pump Stall Boost Pressure	106 to 126 kPa (15 to 18 psi)
	Engine Speed - Full Load	2000 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)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Compare the exhaust temperature variance at each exhaust port.

Performance Checks

ReferenceRefer to Testing & Adjusting, RENR9125, "Hydraulic System" for more detail on the following test.

Operational Checks

Swing Speed and Overswing on Level Ground - Check

Table 7

Swing Speed and Overswing on Level Ground - Check
Status (1)	Description	Specifications (2)	Actual	Comments
	Left Swing	10 to 10.5
	Right Swing

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Number of Revolutions in 60 seconds.

Cylinder Drift - Check

Table 8

Cylinder Drift Per Minute
Status (1)	Description	Specifications		Actual	Comments
		Pressure
		28000 kPa (4060 psi)	28000 kPa (4060 psi) (3)
	Stick Cylinder	37 mm (1.46 inch) (2)	2.9 mm (0.11 inch) (3)
	Boom Cylinder	12 mm (0.47 inch) (2)	2.9 mm (0.11 inch) (3)
	Bucket Cylinder	28 mm (1.10 inch) (2)	2.9 mm (0.11 inch) (3)
	VA Boom Cylinder	14.8 mm (0.58 inch) (2)	2.9 mm (0.11 inch) (3)

( 1 )	N = Normal, M = Monitor, A = Action
( 3 )	Maximum drift with lowering control valve
( 2 )	Maximum drift

Cylinder Speed - Check

Table 9

Cylinder Operating Speed (seconds)
Status (1)	Description	Specifications	Actual	Comments
	Boom Extension	6.6 ± 0.2
	Boom Retraction	4.5 ± 0.2
	Stick Extension	3.2 ± 0.2
	Stick Retraction	3.5 ± 0.2
	Bucket Extension	2.1 ± 0.2
	Bucket Retraction	2.6 ± 0.2
	VA Boom Extension	4.5 ± 0.2
	VA Boom Retraction	10.2 ± 0.2
	Stabilizer Extension (2)	8.0 ± 0.2
	Stabilizer Retraction (2)	8.0 ± 0.2

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Movement of two cylinders at the same time

Hydraulic System

ReferenceRefer to Testing & Adjusting, RENR9125, "Hydraulic System" for more detail on the following test.

Pilot System

Relief Valve (Pilot) - Test and Adjust

Table 10

Status (1)	Description	Specifications	Actual	Comments
	Pilot Pressure	3100 to 3300 kPa (450 to 479 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Accumulator - Test and Charge

Table 11

Status (1)	Description	Specifications	Actual	Comments
	Pilot accumulator gas charge pressure (2)	1000 kPa (145 psi)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Nitrogen gas pressure varies with the temperature. To obtain the most accurate nitrogen charge, the temperature of the accumulator must be identical to the air temperature around the accumulator. The specification is with an air temperature of 21 °C (70 °F). Refer to Testing and Adjusting, RENR9125, "Accumulator - Test and Charge" for additional charging pressure and temperature relationships.

Pump System

Margin Pressure - Test and Adjust

Table 12

Status (1)	Description		Specifications	Actual	Comments
	Low Pressure Standby		2800 to 3500 kPa (406 to 508 psi)
	Margin Pressure (2)		2100 to 2300 kPa (305 to 334 psi)
	Margin Pressure	Hydraulic Modulation 1	1800 ± 200 kPa (261 ± 29 psi)
		Hydraulic Modulation 2	1400 ± 200 kPa (203 ± 29 psi)
		Hydraulic Modulation 3	1000 ± 200 kPa (145 ± 29 psi)
	Main Pump Pressure		35100 to 36300 kPa (5091 to 5265 psi)
	Load Sensing Signal Limiter Pressure		33000 to 34000 kPa (4786 to 4931 psi)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Use Electronic Technician to override the travel pilot solenoid, with the machine in FIRST GEAR, and the engine speed at the HIGH IDLE position.

Main Pump (Proportional Reducing Valve) - Test and Adjust

Table 13

Status (1)	Description		Specifications	Actual	Comments
			No load
	Main pump pressure (Proportional reducing valve)	Mode E	1590 ± 50 kPa (231 ± 7 psi)
		Mode P	1970 ± 50 kPa (286 ± 7 psi)
		Mode T	2480 ± 50 kPa (360 ± 7 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Main Pump (Destroke Pressure) - Test and Adjust

Table 14

Status (1)	Description	Specifications	Actual	Comments
	Destroke Pressure at Mode P (2)	15000 ± 1000 kPa (2176 ± 145 psi)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Use the Electronic Technician to adjust the constant mode from 1970 kPa (285 psi).

Main Pump (Unloading Valve) - Test and Adjust

Table 15

Status (1)	Description	Specifications	Actual	Comments
	Main Pump Pressure	2800 to 3400 kPa (406 to 493 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Main Control Valve System

Relief Valve (Main) - Test and Adjust

Table 16

Status (1)	Description	Specifications	Actual	Comments
	Main Relief Valve (implement or travel)	41000 to 43000 kPa (5947 to 6237 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Signal Limiter) - Test and Adjust

Table 17

Status (1)	Description	Specifications	Actual	Comments
	Signal Limiter Relief Valve pressure	33000 to 34000 kPa (4786 to 4931 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Line) - Test and Adjust - Implement

Table 18

Status (1)	Description			Specifications	Actual	Comments
	Line relief valve	Boom Cylinder	Head End	38000 to 40000 kPa (5512 to 5802 psi)
			Rod End
		Stick Cylinder	Head End
			Rod End
		Bucket Cylinder	Head End
			Rod End
		VA Boom Cylinder	Head End
			Rod End	40000 to 42000 kPa (5802 to 6092 psi)
		Combination Valve (2)		41000 kPa (5947 psi)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	This circuit should be set according to the attachment that is going to be used on the machine. The pressure should never exceed 41000 kPa (5947 psi).

Boom System

Control Valve (Boom Lowering) - Test and Adjust

Table 19

Status (1)	Description	Specifications	Actual	Comments
	Lowering Control Valve pressure	38000 to 40000 kPa (5512 to 5802 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Pressure Switch (Overload Warning) - Test and Adjust

Table 20

Status (1)	Description	Specifications	Actual	Comments
	Overload Warning Pressure	15000 to 16500 kPa (2175 to 2393 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Stick System

Control Valve (Stick Lowering) - Test and Adjust

Table 21

Status (1)	Description	Specifications	Actual	Comments
	Lowering control valve pressure	38000 to 40000 kPa (5512 to 5802 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Swing System

Swing Pump Control (Mechanical Zero) - Test and Adjust

Table 22

Status (1)	Description	Specifications	Actual	Comments
	Swing charge pressure (pump)	2000 to 2200 kPa (290 to 319 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Swing Pump Control (High Pressure Cutoff) - Test and Adjust

Table 23

Status (1)	Description	Specifications	Actual	Comments
	Swing cutoff pressure	31000 to 32500 kPa (4496 to 4714 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Swing Brake Pressure - Test

Table 24

Status (1)	Description	Specifications	Actual	Comments
	Swing Brake Pressure	3000 to 3300 kPa (435 to 479 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Solenoid Valve (Swing Pump Proportional Relief) - Test and Adjust

Table 25

Status (1)	Description		Specifications	Actual	Comments
	Swing pump pressure (Proportional relief valve)	Mode E	1100 ± 50 kPa (160 ± 7 psi)
		Mode P	1500 ± 50 kPa (218 ± 7 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Swing Charge Pressure) - Test and Adjust

Table 26

Status (1)	Description	Specifications	Actual	Comments
	Swing Charge Pressure	2000 to 2200 kPa (290 to 320 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Swing Pump) - Test and Adjust

Table 27

Status (1)	Description	Specifications	Actual	Comments
	Line relief valve - Swing	35200 to 37200 kPa (5105 to 5395 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Travel System

Travel Motor (Destroke Point) - Test and Adjust

Table 28

Status (1)	Description	Specifications	Actual	Comments
	Destroke Pressure	550 ± 50 kPa (80 ± 7 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Travel Motor (Upstroke Point) - Test and Adjust

Table 29

Status (1)	Description	Specifications	Actual	Comments
	Upstroke Pressure	13000 to 13500 kPa (1886 to 1959 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Relief Valve (Travel Motor) - Test and Adjust

Table 30

Status (1)	Description	Specifications	Actual	Comments
	Travel System Pressure	42000 kPa (6092 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Steering and Brake Systems

Accumulator (Wheel Brake Charge Pressure) - Test and Adjust

Table 31

Status (1)	Description	Specifications	Actual	Comments
	Service Brake Accumulator Gas Charge Pressure (2)	4500 kPa (650 psi)

( 1 )	N = Normal, M = Monitor, A = Action
( 2 )	Nitrogen gas pressure varies with the temperature. To obtain the most accurate nitrogen charge, the temperature of the accumulator must be identical to the air temperature around the accumulator. The specification is with an air temperature of 21 °C (70 °F). Refer to Testing and Adjusting, "Accumulator - Test and Charge" for additional charging pressure and temperature relationships.

Relief Valve (Steering) - Test

Table 32

Status (1)	Description	Specifications	Actual	Comments
	Steering pressure	19500 to 21000 kPa (2828 to 3046 psi)

( 1 )

N = Normal, M = Monitor, A = Action

Work Tool Systems

Relief Valve (Medium Pressure Function) - Test and Adjust

Table 33

Status (1)	Description	Specifications	Actual	Comments
	Line relief valve	21000 to 23000 kPa (3046 to 3336 psi)
	Relief valve	17500 to 18500 kPa (2538 to 2683 psi)

( 1 )

N = Normal, M = Monitor, A = Action

S.O.S

ReferenceRefer to Operation and Maintenance Manual, SEBU7945, "Maintenance Interval Schedule" for more detail on performing S.O.S samples.

Table 34

Status (1)	Description	Obtain		Comments
	Engine Oil Sample
	Engine Coolant Sample (Level II)
	Hydraulic Oil Sample
	Swing Drive Oil Sample
	Right Final Drive Oil Sample
	Left Final Drive Oil Sample

( 1 )

N = Normal, M = Monitor, A = Action