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374D ExcavatorTA2 Technical Inspection {0372, 1000, 7000, 753T, 7565} Caterpillar


374D ExcavatorTA2 Technical Inspection {0372, 1000, 7000, 753T, 7565}

Usage:

374D L PAP
Excavator
374D (S/N: PJA1-UP; PAP1-UP; PAS1-UP; PAX1-UP)

Introduction

Inspections are the most basic form of condition monitoring. They 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 stated otherwise

  • Engine Speed Dial "10"

  • AEC OFF

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

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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, SENR9832, "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)
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(1) N = Normal, M = Monitor, A = Action

Engine

Cooling System

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Table 2
Status(1)  Description  Specification  Actual  Comments 
  Radiator Pressure Relief (Radiator Cap)(2)       
  Check Freezing Point of Engine Coolant      Use 245-5829 Coolant/Battery Tester Gp. 
  Test Engine Coolant Conditioner      Use 8T-5296 Coolant Conditioner Test Kit. 
  Check Belt Tension  Auto-tension     
  Engine Coolant Temperature  89 ± 3 °C (192 ± 5 °F)     
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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 at Low Idle  538 kPa (78 psi)     
  Fuel Pressure at High Idle  641 kPa (93 psi)     
Show/hide table
(1) N = Normal, M = Monitor, A = Action

Lubrication System

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Table 4
Status(1)  Description  Specification  Actual  Comments 
  Engine Oil Pressure  641 kPa (93 psi)     
  Engine Oil Pressure at High Idle  221 kPa (32 psi)     
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(1) N = Normal, M = Monitor, A = Action

Basic Engine

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Table 5
Status(1)  Item  Specifications  Actual  Comments 
New Rebuild  Service Limit 
  High Idle(2)  1960 ± 50 rpm(3)  1760 to 2010 rpm(3)     
  1880 ± 50 rpm(4) 1680 to 1930 rpm(4)     
  AEC reduced speed.(5)  1300 ± 50 rpm  1300 ± 100 rpm     
  Low Idle  900 ± 50 rpm  900 ± 100 rpm     
  One Touch Low Idle  1020 ± 50 rpm  1100 ± 100 rpm     
  Maximum speed with load(6)  "HPC - OFF"  1720 to 1800 rpm  1670 rpm(7)  1620 rpm(7)     
  "HPC - ON" 1920 to 2000 rpm  1870 rpm(7)  1820 rpm(7)     
  Cylinder Cutout Test            Cat® Electronic Technician (Cat ET) Service Tool 
  Engine Crankcase Blowby Pressure             
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(1) N = Normal, M = Monitor, A = Action
(2) AEC switch in the OFF position
(3) Engine rpm within 3 seconds after the engine speed dial was placed at position "10"
(4) 3 seconds after the engine speed dial was placed at position "10"
(5) AEC switch in the ON position
(6) Pressure is relieved from both pumps.
(7) Minimum

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)       
  Cylinder # 7 Exhaust Temperature (2)       
  Cylinder # 8 Exhaust Temperature (2)       
Show/hide table
(1) N = Normal, M = Monitor, A = Action
(2) Compare the exhaust temperature variance at each exhaust port.

Performance Checks

Reference: Refer to Testing & Adjusting, KENR7775, "374D Excavator Hydraulic System" for more detail on the following tests.

Travel on Level Ground - Test

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Table 7
Status(1)  Description  Specification  Actual  Comments 
New Rebuild Service Limit 
Travel Time - Check 
  Travel Distance  25 m (82.0 ft)
First 5 m (16.4 ft) is preliminary. Measure travel time for remaining 20 m (65.6 ft). 
  High Forward  19 or less  22 or less  24.5 or less     
  High Reverse  19 or less  22 or less  24.5 or less     
  Low Forward  27.5 or less  31.5 or less  36 or less     
  Low Reverse  27.5 or less  31.5 or less  36 or less     
Travel Deviation - Check 
  High Forward  800 mm (31.5 inch) or less  1200 mm (47.2 inch) or less  1500 mm (59.1 inch) or less     
  High Reverse  800 mm (31.5 inch) or less  1200 mm (47.2 inch) or less  1500 mm (59.1 inch) or less     
  Low Forward  800 mm (31.5 inch) or less  1200 mm (47.2 inch) or less  1500 mm (59.1 inch) or less     
  Low Reverse  800 mm (31.5 inch) or less  1200 mm (47.2 inch) or less  1500 mm (59.1 inch) or less     
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(1) N = Normal, M = Monitor, A = Action

Travel on Level Ground - Test (Optional Test)

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Table 8
Status(1)  Description  Specification  Actual  Comments 
New Rebuild Service Limit 
Travel Speed (Right Track)(2) 
  High Forward  34.5 or less  40.0 or less  45.0 or less     
  High Reverse  34.5 or less  40.0 or less  45.0 or less     
  Low Forward  49.5 or less  57.0 or less  64.5 or less     
  Low Reverse  49.5 or less  57.0 or less  64..5 or less     
Travel Speed (Left Track)(2) 
  High Forward  34.5 or less  40.0 or less  45.0 or less     
  High Reverse  34.5 or less  40.0 or less  45.0 or less     
  Low Forward  49.5 or less  57.0 or less  64.5 or less     
  Low Reverse  49.5 or less  57.0 or less  64.5 or less     
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(1) N = Normal, M = Monitor, A = Action
(2) The allowable difference in time between the left and the right track is 1.0 sec or less.

Machine Drift on a Slope - Check

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Table 9
Status(1)  Description  Specification  Actual  Comments 
New Rebuild Service Limit 
  Machine Drift on a Slope - Check  0  0  0     
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(1) N = Normal, M = Monitor, A = Action

Swing Speed and Overswing on Level Ground - Check

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Table 10
Status(1)  Description  Specification  Actual  Comments 
New Rebuild Service Limit 
  Swing Speed (Right Swing)  6.4 or less  7.4 or less  8.3 or less     
  Swing Speed (Left Swing)  6.4 or less  7.4 or less  8.3 or less     
  Swing Drift (Right Swing)  1000 mm (39 inch) or less  1150 mm (45 inch) or less  1300 mm (51 inch) or less     
  Swing Drift (Left Swing)  1000 mm (39 inch) or less  1150 mm (45 inch) or less  1300 mm (51 inch) or less     
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(1) N = Normal, M = Monitor, A = Action

Swing Speed and Swing Drift on a Slope -Check

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Table 11
Status(1)  Description  Specification  Actual  Comments 
New Rebuild Service Limit 
  Swing Speed (Right Swing)  6.1 or less  7.0 or less  7.9 or less     
  Swing Speed (Left Swing)  6.1 or less  7.0 or less  7.9 or less     
  Swing Drift (Right Swing)  190 mm (7.48 inch)  285 mm (11.22 inch)  380 mm (14.96 inch)     
  Swing Drift (Left Swing)  190 mm (7.48 inch)  285 mm (11.22 inch)  380 mm (14.96 inch)     
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(1) N = Normal, M = Monitor, A = Action

Cylinder Drift - Check (Loaded Bucket)

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Table 12
Status(1)  Description  Specification  Actual  Comments 
New Rebuild Service Limit 
  Weight of Bucket Load       
  Boom Cylinder  6.0 mm (0.24 inch)  12.0 mm (0.47 inch)  24.0 mm (0.94 inch)     
  Stick Cylinder  12.0 mm (0.47 inch)  18.0 mm (0.71 inch)  30.0 mm (1.18 inch)     
  Bucket Cylinder  30.0 mm (1.18 inch)  45.0 mm (1.77 inch)  75.0 mm (2.95 inch)     
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(1) N = Normal, M = Monitor, A = Action

Cylinder Drift - Check (Empty Bucket)

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Table 13
Status(1)  Description  Specification  Actual  Comments 
New Rebuild Service Limit 
  Boom Cylinder  6.0 mm (0.24 inch)  12.0 mm (0.47 inch)  24.0 mm (0.94 inch)     
  Stick Cylinder  10.0 mm (0.39 inch)  15.0 mm (0.59 inch)  25.0 mm (0.98 inch)     
  Bucket Cylinder  10.0 mm (0.39 inch)  15.0 mm (0.59 inch)  25.0 mm (0.98 inch)     
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(1) N = Normal, M = Monitor, A = Action

Cylinder Speed - Check

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Table 14
Status(1)  Description  Specification  Actual  Comments 
New Rebuild Service Limit 
  Boom Extension  5.1 ± 0.5  6.6 or less  7.7 or less     
  Boom Retraction  3.1 ± 0.5  4.0 or less  4.6 or less     
  Stick Extension  4.4 ± 0.5  5.7 or less  6.6 or less     
  Stick Retraction  3.4 ± 0.5  4.5 or less  5.2 or less     
  Bucket Extension (VB2–Family)  3.7 ± 0.5  4.8 or less  5.5 or less     
  Bucket Retraction (VB2–Family)  2.5 ± 0.5  3.1 or less  3.6 or less     
  Bucket Extension (WB2–Family)  3.9 ± 0.5  5.1 or less  5.9 or less     
  Bucket Retraction (WB2–Family)  2.7 ± 0.5  3.3 or less  3.8 or less     
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(1) N = Normal, M = Monitor, A = Action

Hydraulic System

Reference: Refer to Testing & Adjusting, KENR7775, "374D Excavator Hydraulic System" for more detail on the following test.

Relief Valve (Pilot) - Test and Adjust

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Table 15
Status(1)  Description  Specification  Actual  Comments 
  Relief Valve (Pilot)  4120 ± 100 kPa (600 ± 15 psi)     
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(1) N = Normal, M = Monitor, A = Action

Accumulator (Pilot) - Test and Charge

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Table 16
Status(1)  Description  Specification  Actual  Comments 
  Pilot Accumulator  1035 kPa (150 psi)    Should stay above 1035 kPa (150 psi) within 1 minute. 
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(1) N = Normal, M = Monitor, A = Action

Margin Pressure - Test and Adjust

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Table 17
Status(1)  Description  Specification  Actual  Comments 
  Rear Pump  1960 ± 50 kPa (285 ± 7 psi)     
  Front Pump  1960 ± 50 kPa (285 ± 7 psi)     
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(1) N = Normal, M = Monitor, A = Action

Relief Valve (Signal) - Test and Adjust

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Table 18
Status(1)  Description  Specification  Actual  Comments 
  Relief Valve (Signal) - Low Pressure  35000 + 500 - 1000 kPa (5076 + 73 - 145 psi)     
  Relief Valve (Signal) - High Pressure  35000 + 500 - 1000 kPa (5076 + 73 - 145 psi)     
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(1) N = Normal, M = Monitor, A = Action

Relief Valve (Line) - Test

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Table 19
Status(1)  Description  Specification  Actual  Comments 
  Boom Head End  37000 + 500 - 1000 kPa (5366 + 73 - 145 psi)     
  Boom Rod End  37000 + 500 - 1000 kPa (5366 + 73 - 145 psi)     
  Stick Head End  37000 + 500 - 1000 kPa (5366 + 73 - 145 psi)     
  Stick Rod End  37000 + 500 - 1000 kPa (5366 + 73 - 145 psi)     
  Bucket Head End  37000 + 500 - 1000 kPa (5366 + 73 - 145 psi)     
  Bucket Rod End  37000 + 500 - 1000 kPa (5366 + 73 - 145 psi)     
Show/hide table
(1) N = Normal, M = Monitor, A = Action

Relief Valve (Swing) - Test

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Table 20
Status(1)  Description  Specification  Actual  Comments 
  Right Swing Motor (right relief valve)  30350 + 500 - 1000 kPa (4402 + 73 - 145 psi)     
  Right Swing Motor (left relief valve)  30350 + 500 - 1000 kPa (4402 + 73 - 145 psi)     
  Left Swing Motor (right relief valve)  30350 + 500 - 1000 kPa (4402 + 73 - 145 psi)     
  Left Swing Motor (left relief valve)  30350 + 500 - 1000 kPa (4402+ 73 - 145 psi)     
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(1) N = Normal, M = Monitor, A = Action

Relief Valve (Crossover) - Test

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Table 21
Status(1)  Description  Specification  Actual  Comments 
  Forward Left Travel  39250 + 1500 - 2000 kPa (5693 + 218 - 290 psi)     
  Reverse Left Travel  39250 + 1500 - 2000 kPa (5693 + 218 - 290 psi)     
  Forward Right Travel  39250 + 1500 - 2000 kPa (5693 + 218 - 290 psi)     
  Reverse Right Travel  39250 + 1500 - 2000 kPa (5693 + 218 - 290 psi)     
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(1) N = Normal, M = Monitor, A = Action

Hydraulic Fan Speed - Test and Adjust

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Table 22
Status(1)  Description  Specification  Actual  Comments 
  Minimum Fan Speed  510 ± 20     
  Maximum Fan Speed  870 ± 20     
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(1) N = Normal, M = Monitor, A = Action

Miscellaneous Hydraulic

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Table 23
Status(1)  Description  Specification  Actual  Comments 
  Relief Valve (Counterweight Cylinder) - Test and Adjust  20600 + 1000 - 0 kPa (2990 + 145 - 0 psi)     
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(1) N = Normal, M = Monitor, A = Action

S.O.S

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Table 24
Status(1)  Description  Obtain  Comments 
  Engine Oil Sample     
  Engine Coolant Sample (Level II)     
  Hydraulic Oil Sample     
  Right Final Drive Oil Sample     
  Left Final Drive Oil Sample     
  Swing Drive Oil Sample     
Show/hide table
(1) N = Normal, M = Monitor, A = Action

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