320 GC, 320, and 323 Excavator TA2 Technical Inspection {0372, 1000, 7000, 753T, 7565} Caterpillar


320 GC, 320, and 323 Excavator TA2 Technical Inspection {0372, 1000, 7000, 753T, 7565}

Usage:

320 HEX
Excavator
320 (S/N: YCP1-UP; HEX1-UP)
320 GC (S/N: XBJ1-UP; KTN1-UP)
323 (S/N: RAZ1-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 stated otherwise

  • Engine Speed Dial "7"

  • 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

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(2)  12.4 VDC or more     
  Charging System Test(3)  18 VDC to 32 VDC     
  Electric Starting System Test(4)  12 to 16 V at −23° C (−10° F) to −7° C (19° F)     
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
(2) Refer to Special Instruction, SEHS7633, "Battery Test Procedure".
(3) Refer to Special Instruction, REHS0354, "Charging System Troubleshooting".
(4) Refer to Testing and Adjusting, RENR2415, "Electric Starting System - Test".

Engine

Cooling System

Table 2
Status(1)  Description  Specification  Actual  Comments 
  Radiator Pressure Relief (Radiator Cap)(2)      Refer to System Operation Testing and Adjusting. 
  Freezing Point of Engine Coolant      Refer to Operation and Maintenance Manual. 
  Conditioner Test of Engine Coolant      Refer to Operation and Maintenance Manual. 
  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 
  Fuel Pressure of the Fuel System at Idle Speed  150 kPa (22 psi)     
(1) N = Normal, M = Monitor, A = Action

Lubrication System

Table 4
Status(1)  Sales Model  Description  Specification  Actual  Comments 
  320 GC, 320  Minimum Oil Pressure at Maximum Engine Speed  280 kPa (40 psi)     
  323  Minimum Oil Pressure at Maximum Engine Speed  315 kPa (45 psi)     
(1) N = Normal, M = Monitor, A = Action

Basic Engine

Table 5
Engine Performance - Test (Engine Speed)   
Status(1)  Sales Model  Description  Service Limit  Actual  Comments 
  320 GC  Engine Dial 7 At No Load (AEC Off)  STD Mode  1700 ± 50 RPM     
  Engine Dial "7" At No Load (AEC On) 950 ± 50 RPM     
  One Touch Low Idle 950 ± 50 RPM     
  Engine Dial "1" At No Load 900 ± 50 RPM     
  Engine Dial "7" At Full Load(2) 1700 ± 50 RPM     
  Engine Dial "7" At Low Load Traveling(3) 1700 ± 50 RPM     
  Engine Dial "7" At Full Load Traveling(4) 2000 ± 50 RPM     
  320  Engine Dial 7 At No Load (AEC Off)  STD Mode  1650 ± 50 RPM     
  ECO Mode 1550 ± 50 RPM  
  Engine Dial "7" At No Load (AEC On) 1000 ± 50 RPM     
  One Touch Low Idle 1000 ± 50 RPM     
  Engine Dial "1" At No Load 900 ± 50 RPM     
  Engine Dial "7" At Full Load(2) 1650 ± 50 RPM     
  Engine Dial "7" At Low Load Traveling(3) 1650 ± 50 RPM     
  Engine Dial "7" At Full Load Traveling(4) 1800 ± 50 RPM     
  323  Engine Dial 7 At No Load (AEC Off)  Power Mode  1650 ± 50 RPM     
  ECO Mode 1550 ± 50 RPM  
  Engine Dial "7" At No Load (AEC On) 1000 ± 50 RPM     
  One Touch Low Idle 1000 ± 50 RPM     
  Engine Dial "1" At No Load 900 ± 50 RPM     
  Engine Dial "7" At Full Load(2) 1650 ± 50 RPM     
  Engine Dial "7" At Low Load Traveling(3) 1650 ± 50 RPM     
  Engine Dial "7" At Full Load Traveling(4) 1800 ± 50 RPM     
(1) N = Normal, M = Monitor, A = Action
(2) Two pump main relief (Boom UP).
(3) One track blocked
(4) Both tracks blocked

Air Inlet and Exhaust System

Table 6
Status(1)  Description  Specification  Actual  Comments 
Inlet Manifold Pressure - Test 
  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, M0081159, "Performance Tests" for more detail on the following test.

Operational Checks

Travel on Level Ground - Test

Table 7
Travel on Level Ground - Test 
Travel Time (time in seconds) 
Status(1)  Machine  Travel Speed  New  Service Limit  Actual  Comments 
  320 GC  HIGH  Forward  12.3 ± 0.5  16.0 ± 1.0     
  Reverse  
  LOW Forward  19.9 ± 0.5  25.9 ± 1.0     
  Reverse  
  320 / 323  HIGH  Forward  12.6 ± 0.5  16.4 ± 1.0     
  Reverse  
  LOW Forward  20.5 ± 0.5  26.7 ± 1.0     
  Reverse  
Travel Deviation(2) mm (inch) 
Status(1)  Travel Speed  New  Service Limit  Actual  Comments 
  HIGH  Forward  650 mm (25.6 inch) or less  650 mm (25.6 inch) or less     
  Reverse  
  LOW  Forward  650 mm (25.6 inch) or less  650 mm (25.6 inch) or less     
  Reverse  
(1) N = Normal, M = Monitor, A = Action
(2) Travel deviation (distance) from the reference line

Travel on Level Ground - Test (Optional Test)

Table 8
Travel on Level Ground - Test (Optional Test) 
Time For Three Revolutions (time in seconds) 
Status(1)  Machine  Travel Speed  New  Service Limit  Actual  Comments 
Right Left
  320 GC
Standard Undercarriage 
HIGH  Forward  15.8 ± 1.0  20.5 ± 1.0       
  Reverse  
  LOW Forward  25.5 ± 1.0  33.2 ± 1.0       
  Reverse  
  320
Standard Undercarriage 
HIGH  Forward  16.2 ± 1.0  21.1 ± 1.0       
  Reverse  
  LOW Forward  26.3 ± 1.0  34.2 ± 1.0       
  Reverse  
  320 / 323
Long Undercarriage 
HIGH  Forward  17.6 ± 1.0  22.9 ± 1.0       
  Reverse  
  LOW Forward  28.6 ± 1.0  37.2 ± 1.0       
  Reverse  
(1) N = Normal, M = Monitor, A = Action

Automatic Travel Speed Control - Test

Table 9
Automatic Travel Speed Control - Test 
Status(1)  Description  Specification  Actual  Comments 
Item Pressure tap  Speed 
  Right Travel  Pump 1  High to Low  32000 ± 500 kPa (4641 ± 73 psi)     
  Low to High 18000 ± 500 kPa (2611 ± 73 psi)    
  Left Travel  Pump 2  High to Low  32000 ± 500 kPa (4641 ± 73 psi)     
  Low to High 18000 ± 500 kPa (2611 ± 73 psi)     
(1) N = Normal, M = Monitor, A = Action

Machine Drift on a Slope - Check

Table 10
Machine Drift on a Slope - Check 
Status(1)  Description  Specification  Actual  Comments 
New Service Limit
  Machine Drift  0 mm  0 mm     
(1) N = Normal, M = Monitor, A = Action

Swing Speed and Overswing on Level Ground - Check

Table 11
Swing Speed and Overswing on Level Ground - Check (time in seconds) 
Swing Time (time in seconds) 
Status(1)  Description  New  Service Limit  Actual  Comments 
  Right Swing  4.5 or less  5.5 or less     
  Left Swing 
Overswing mm (inch) 
Status(1)  Description  New  Service Limit  Actual  Comments 
  Right Swing  1509.6 mm (59.43 inch) or less  1962.1 mm (77.25 inch) or less     
  Left Swing 
(1) N = Normal, M = Monitor, A = Action

Swing Speed and Swing Drift on a Slope -Check

Table 12
Swing Speed and Swing Drift on a Slope 
Swing Time (seconds) 
Status(1)  Item  New  Service Limit  Actual  Comments 
  Right Swing  3.5 or less  4.6 or less     
  Left Swing 
Swing Drift mm (inch) 
Status(1)  Item  New  Service Limit  Actual  Comments 
  Right Swing     
  Left Swing 
(1) N = Normal, M = Monitor, A = Action

Cylinder Drift - Check (Loaded Bucket)

Table 13
Cylinder Drift - Check (Loaded Bucket) 
Status(1)  Item  New  Service Limit  Actual  Comments 
  Boom Cylinder  4.5 mm (0.18 inch) or less  11.3 mm (0.44 inch) or less     
  Stick Cylinder  12.0 mm (0.47 inch) or less  30.0 mm (1.18 inch) or less     
  Bucket Cylinder  18.0 mm (0.71 inch) or less  45.0 mm (1.77 inch) or less     
(1) N = Normal, M = Monitor, A = Action

Table 14
Bucket Configuration Reference 
Model  Capacity  Weight  Load 
B1225HD  1.19 cubic meter (1.56 cubic yard)  1020 kg (2250 lb)  2000 kg (4409 lb) 
B1300GD  1.3 cubic meter (1.70 cubic yard)  880 kg (1940 lb)  2300 kg (5070 lb) 

Cylinder Drift - Check (Empty Bucket)

Table 15
Cylinder Drift - Check (Empty Bucket) 
Status(1)  Item  Cylinder Drift Side  Drift Direction  New  Service Limit  Actual  Comments 
  Boom Cylinder  Retracted  Boom Down  5.0 mm (0.2 inch) or less  11.0 mm (0.43 inch) or less     
  Stick Cylinder  Extended  Stick In  10 mm (0.39 inch) or less  25 mm (0.98 inch) or less     
  Retracted Stick Out  25 mm (0.98 inch) or less  63 mm (2.48 inch) or less     
  Bucket Cylinder  Extended  Bucket Closed  20 mm (0.79 inch) or less  50 mm (1.97 inch) or less     
  Retracted Bucket Open  10 mm (0.39 inch) or less  25 mm (0.98 inch) or less     
(1) N = Normal, M = Monitor, A = Action

Cylinder Speed - Check

Table 16
Cylinder Speed - Check 
Status(1)  Machine  Item  Cylinder Position  Cylinder Operating Speed (seconds)   
New Service Limit Actual Comments
  320 GC  Boom  Extension  3.3 ± 0.3  5.0 ± 0.3     
  Retraction 2.3 ± 0.3 3.5 ± 0.3     
  Stick Extension  3.0 ± 0.3  4.5 ± 0.3     
  Retraction 2.7 ± 0.3  4.1 ± 0.3     
  Bucket Extension  3.2 ± 0.3  4.8 ± 0.3     
  Retraction 1.8 ± 0.3  2.7 ± 0.3     
  320  Boom  Extension  3.3 ± 0.3  5.0 ± 0.3     
  Retraction 2.3 ± 0.3 3.5 ± 0.3     
  Stick Extension  3.2 ± 0.3  4.8 ± 0.3     
  Retraction 2.7 ± 0.3  4.1 ± 0.3     
  Bucket Extension  3.5 ± 0.3  5.3 ± 0.3     
  Retraction 1.8 ± 0.3  2.7 ± 0.3     
  323  Boom  Extension  3.3 ± 0.3  5.0 ± 0.3     
  Retraction 2.3 ± 0.3 3.5 ± 0.3     
  Stick Extension  2.9 ± 0.3  4.4 ± 0.3     
  Retraction 2.7 ± 0.3  4.1 ± 0.3     
  Bucket Extension  3.5 ± 0.3  5.3 ± 0.3     
  Retraction 1.8 ± 0.3  2.7 ± 0.3     
(1) N = Normal, M = Monitor, A = Action

Hydraulic System

Reference: Refer to Testing & Adjusting, M0081159 for more detail on the following tests.

Pressure Reducing Valve (Pilot Oil) - Test and Adjust

Table 17
Pressure Reducing Valve (Pilot)- Test and Adjust 
Status(1)  Description  Specification  Actual  Comments 
  Pressure reducing valve  4100 ±300 kPa (595 ± 44 psi)     
(1) N = Normal, M = Monitor, A = Action

Accumulator (Pilot) - Test and Charge

Table 18
Accumulator (Pilot) - Test 
Status(1)  Description  Specification  Actual  Comments 
  Pilot Accumulator  1035 kPa (150 psi)    Should stay above 1035 kPa (150 psi) for 20 seconds 
(1) N = Normal, M = Monitor, A = Action

Relief Valve (Main) - Test

Table 19
Relief Valve (Main) - Test and Adjust 
  Machine Settings  Engine Speed 
Speed Dial "7"
AEC switch OFF
Status(1)  Item  Specification  Actual  Comments 
  Standard  35000 + 500 - 2000 kPa (5076 + 73 - 290 psi)     
  Heavy Lift (2)  38000 + 500 - 2000 kPa (5512 + 73 - 290 psi)     
(1) N = Normal, M = Monitor, A = Action
(2) If equipped

Relief Valve (Line) - Test

Table 20
Relief Valve (Line) - Test and Adjust 
  Machine Settings  Main Relief Pressure(1) 
Standard 35000 + 500 , - 2000 kPa (5076 + 73 , - 290 psi)
Heavy lift 38000 + 500, - 2000 kPa (5512 + 73, - 290 psi)
Status(2)  Cylinder  Cylinder Position  Engine Speed  Relief Pressure Setting  Actual  Comments 
  Boom  Extended  Speed Dial "7"
AEC switch OFF 
41000 ± 500 kPa (5947 ± 73 psi)     
  Retracted 38000 ± 500 kPa (5511 ± 73 psi)   
  Stick  Extended  Speed Dial "7"
AEC switch OFF 
38000 ± 500 kPa (5511 ± 73 psi)     
  Retracted 41000 ± 500 kPa (5947 ± 73 psi)   
  Bucket  Extended  Speed Dial "7"
AEC switch OFF 
38000 ± 500 kPa (5511 ± 73 psi)     
  Retracted  
  VA Boom  Extended  Speed Dial "7"
AEC switch OFF 
38000 ± 500 kPa (5511 ± 73 psi)     
  Retracted 41000 ± 500 kPa (5947 ± 73 psi)   
(1) System pressure setting before temporary setting adjustment
(2) N = Normal, M = Monitor, A = Action

Relief Valve (Swing) - Test

Table 21
Relief Valve (Swing) - Test and Adjust 
Status(1)  Description  Specification  Actual  Comments 
  Right Swing  25500 ±1000 kPa (3698 ±145 psi)     
  Left Swing   
(1) N = Normal, M = Monitor, A = Action

Swing Bearing Movement - Measure

Table 22
Swing Bearing Movement - Measure 
Status(1)  Description  Specification  Actual  Comments 
New Service Limit
  Vertical Movement of Swing Bearing  2.0 mm (0.08 inch)  4.0 mm (0.16 inch)     
  Circular Movement of Swing Bearing  4.5 mm (0.18 inch)  13.5 mm (0.53 inch)     
(1) N = Normal, M = Monitor, A = Action

Relief Valve (Crossover) - Test

Table 23
Relief Valve (Crossover) - Test and Adjust 
Status(1)  Item  Direction  Machine Settings  Specification  Actual  Comments 
  Left Travel  Forward  Engine speed dial "7"
AEC switch OFF 
37000 ± 500 kPa (5366 ± 73 psi)     
  Reverse Engine speed dial "7"
AEC switch OFF 
37000 ± 500 kPa (5366 ± 73 psi)     
  Right Travel  Forward  Engine speed dial "7"
AEC switch OFF 
37000 ± 500 kPa (5366 ± 73 psi)     
  Reverse Engine speed dial "7"
AEC switch OFF 
37000 ± 500 kPa (5366 ± 73 psi)     
(1) N = Normal, M = Monitor, A = Action

S.O.S

Table 24
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

Caterpillar Information System:

3412C Generator Sets Maintenance Interval Schedule - Prime
140 Motor Grader Systems Electronic Control (Fan Hydraulic System)
New Engine Software are Now Used on Certain 3512C and 3516C Engines {1920} New Engine Software are Now Used on Certain 3512C and 3516C Engines {1920}
140 Motor Grader Machine Systems Wheel Lean Cylinder - Remove and Install
140 Motor Grader Machine Systems Window Wiper and Wiper Motor (Front) - Remove and Install
C9.3B Industrial Engines Exhaust Manifold - Install
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine Systems Blade Cylinder - Remove and Install
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Engine Supplement System Pressure - Release
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Engine Supplement Engine Rear Mount - Remove and Install
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Engine Supplement Pressure Sensor (Cooled Exhaust Gas) - Remove and Install
New Oil Pan is Now Used on Certain C175 Engines {1302, 1302} New Oil Pan is Now Used on Certain C175 Engines {1302, 1302}
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine Systems Offset Boom Cylinder - Remove and Install
140 Motor Grader Machine Systems Window Wiper and Wiper Motor (Rear) - Remove and Install
140 Motor Grader Engine Supplement Enclosure (Cooling System Package) - Remove and Install
320 GC, 320, and 323 ExcavatorTA2 Technical Inspection {0372, 1000, 7000, 753T, 7565} 320 GC, 320, and 323 ExcavatorTA2 Technical Inspection {0372, 1000, 7000, 753T, 7565}
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine System General Information (Main Pump System)
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine System Electronic Control (Main Pump System)
The Differential and Bevel Gear Group are Improved on Certain 797 Off-Highway Trucks {3256, 3258, 3281} The Differential and Bevel Gear Group are Improved on Certain 797 Off-Highway Trucks {3256, 3258, 3281}
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine System Main Hydraulic Pump
C9.3B Industrial Engines Inlet Manifold - Remove
140 Motor Grader Machine Systems Wheel Lean Cylinder - Remove and Install
140 Motor Grader Machine Systems Window Wiper and Wiper Motor (Front) - Remove and Install - Lower
New Flywheel Assembly is Now Available on Certain C9.3 Industrial Engines {1156} New Flywheel Assembly is Now Available on Certain C9.3 Industrial Engines {1156}
797F Tier 4 Off-Highway Truck Field Assembly Introduction
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.