Caterpillar Excavator 311B, 312B & 312B L Repair Service Manual
Complete service repair manual with Electrical Wiring Diagrams for Caterpillar Excavator 311B, 312B, 312BL, with all the technical information to maintain, diagnose, repair, and rebuild like professional mechanics.
Caterpillar Excavator 311B, 312B & 312BL workshop service repair manual includes:
* Numbered table of contents easy to use so that you can find the information you need fast.
* Detailed sub-steps expand on repair procedure information
* Numbered instructions guide you through every repair procedure step by step.
* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.
* Notes, cautions and warnings throughout each chapter pinpoint critical information.
* Bold figure number help you quickly match illustrations with instructions.
* Detailed illustrations, drawings and photos guide you through every procedure.
* Enlarged inset helps you identify and examine parts in detail.
RENR1040 - Specifications (312B; 320B; 322B; 325B; 330B and 345B Excavators Air Conditioning and Heating Systems with R-134a Refrigerant).pdf
RENR1040 - Systems Operation (312B; 320B; 322B; 325B; 330B and 345B Excavators Air Conditioning and Heating Systems with R-134a Refrigerant).pdf
RENR1040 - Testing and Adjusting (312B; 320B; 322B; 325B; 330B and 345B Excavators Air Conditioning and Heating Systems with R-134a Refrigerant).pdf
RENR1074 - Schematic (312B Excavators Stick Lowering Control Valve Hydraulic System (Attachment)).pdf
RENR1075 - Schematic (312B Excavators Stick Lowering Control Valve w_HAB Hydraulic System (Attachment)).pdf
RENR1104 - Systems Operation (312B & 312B L EXCAVATORS HYDRAULIC SYSTEMS).pdf
RENR1105 - Testing and Adjusting (312B & 312B L EXCAVATORS HYDRAULIC SYSTEMS).pdf
RENR1106 - Systems Operation (312B Excavator Attachments).pdf
RENR1106 - Testing and Adjusting (312B Excavator Attachments).pdf
RENR1108 - Schematic (312B Excavator Hydraulic System).pdf
RENR1111 - Schematic (312B Excavators Single Action; One Pump Hydraulic System (Attachment)).pdf
RENR1112 - Schematic (312; 312B and 312B L Excavators Medium Pressure Hydraulic System (Attachment)).pdf
RENR1113 - Disassembly and Assembly (312B Excavator Machine Systems).pdf
RENR1115 - Schematic (Caterpillar 312B and 312B L Excavator Electrical System).pdf
RENR1119 - Disassembly and Assembly (3054 Engine Supplement for 312B and 312B L Excavators).pdf
RENR1976 - Specifications (312B-5090B; M325B; W330B and W345B Series II Excavators Air Conditioning and Heating).pdf
RENR1976 - Systems Operation (312B-5090B; M325B; W330B and W345B Series II Excavators Air Conditioning and Heating).pdf
RENR1976 - Testing and Adjusting (312B-5090B; M325B; W330B and W345B Series II Excavators Air Conditioning and Heating).pdf
RENR1998 - Systems Operation (308B; 311B; 312B; 315B; 317B; 318B; 320B; 322B; 325B; 330B; M325B and W330B Excavators Engine and Pump Control).pdf
RENR1998 - Testing and Adjusting (308B; 311B; 312B; 315B; 317B; 318B; 320B; 322B; 325B; 330B; M325B and W330B Excavators Engine and Pump Control).pdf
RENR2969 - Schematic (312B Excavators Double Action; One Pump (HAB) Hydraulic System (Attachment)).pdf
SENR9223 - Disassembly and Assembly (SUPPLEMENT for 311B; 312B & 312B L EXCAVATORS - 3064 ENGINE).pdf
SENR9225 - Specifications (311B; 312B & 312B L EXCAVATORS HYDRAULIC ATTACHMENTS).pdf
SENR9227 - Specifications (311B and 312B Excavators Hydraulic System).pdf
SENR9227 - Testing and Adjusting (311B and 312B Excavators Hydraulic System).pdf
SENR9228 - Systems Operation (311B, 312B & 312B L EXCAVATOR ATTACHMENTS).pdf
SENR9228 - Testing And Adjusting (311B, 312B & 312B L EXCAVATOR ATTACHMENTS).pdf
SENR9235 - Disassembly and Assembly (311B; 312B & 312B L EXCAVATORS MACHINE SYSTEMS).pdf
SENR9236 - Schematic (311B and 312B Excavator Electrical System).pdf
PRODUCT DETAILS:
Total Pages: 2,413 pages
File Format: PDF (Internal Links, Bookmarked, Table of Contents, Searchable, Printable, high quality)
Language: English
TABLE OF CONTENTS
RENR1040 - Specifications (312B; 320B; 322B; 325B; 330B and 345B Excavators Air Conditioning and Heating Systems with R-134a Refrigerant)..3
Refrigerant Compressor..4
Pressure Switch (Refrigerant Pressure Cutoff)..7
Air Conditioner Lines..8
System Capacities for Refrigerant (Excavators) - 312B-5090B..12
RENR1040 - Systems Operation (312B; 320B; 322B; 325B; 330B and 345B Excavators Air Conditioning and Heating Systems with R-134a Refrigerant)..17
General Information..18
Air Conditioning and Heating System Schematic..21
Refrigerant Compressor..26
Refrigerant Relief Valve..28
Refrigerant Condenser..29
Evaporator Coil..31
Refrigerant Accumulator..33
Blower Motor..35
Actuator Motor (Damper Assembly) - 150-1387 and 159-3665 Control Gp..37
Actuator Motor (Water Valve) - 150-1387 Control Gp..39
Control Panel (Air Conditioner and Heater)..42
Control Module - Main Control Module - Heater_Air Conditioner Unit..48
Speed Control - Resistor and Relays for Controlling Fan Speed..52
Heater System (Cab) - Machines with Heater and No A_C (If Equipped)..54
Heater System (Cab)..58
Heater System (Cab) - Manually Controlled System (If Equipped)..60
Heater Core (Cab)..63
RENR1040 - Testing and Adjusting (312B; 320B; 322B; 325B; 330B and 345B Excavators Air Conditioning and Heating Systems with R-134a Refrigerant)..65
Troubleshooting Faults With Service Codes..66
Troubleshooting Air Conditioner Control..67
Air Conditioning System Troubleshooting..73
Air Conditioning System Schematic..85
Heating System Troubleshooting..86
Heating System Troubleshooting - Manually Controlled System (If Equipped)..96
Heating System Schematic..103
Heating System Schematic - Manually Controlled System (If Equipped)..105
Required Tools..107
Refrigerant Recovery..109
Manifold Gauge Set (Refrigerant) - Install..113
Refrigerant System - Evacuate..115
Refrigerant System - Flush..120
Refrigerant Leakage - Test..122
Refrigerant Compressor Oil - Check..124
Refrigerant System - Charge..127
Manifold Gauge Set (Refrigerant) - Remove..140
Temperature Sensor - Test..142
V-Belt - Test..144
RENR1074 - Schematic (312B Excavators Stick Lowering Control Valve Hydraulic System (Attachment))..146
Main..147
Collage..149
RENR1075 - Schematic (312B Excavators Stick Lowering Control Valve w_HAB Hydraulic System (Attachment))..164
Main..165
Collage..167
RENR1104 - Systems Operation (312B & 312B L EXCAVATORS HYDRAULIC SYSTEMS)..182
RENR1105 - Testing and Adjusting (312B & 312B L EXCAVATORS HYDRAULIC SYSTEMS)..313
RENR1106 - Systems Operation (312B Excavator Attachments)..368
Auxiliary Control (Medium Pressure Circuit)..369
One-Way Hydraulic Flow Operation..371
Two-Way Hydraulic Flow Operation..376
Two Pump Operation..381
Combined Function Hydraulic Operation - Pilot Lines..387
Combined Function Hydraulic Operation - Front Lines Group..394
Combined Function Hydraulic Operation - Ball Valves..401
Combined Function Hydraulic Operation..406
Combined Function Hydraulic Operation - Hydraulic Control Group..407
Lowering Control Valve (Boom)..409
RENR1106 - Testing and Adjusting (312B Excavator Attachments)..414
General Information..415
Visual Inspection..417
Hydraulic System Pressure - Release..418
Operational Checks..419
Pressure Specifications..421
Required Tools..422
Piston Pump (Main) - Purge..423
Relief Valve (One Way Flow Line) - Test and Adjust..425
Lowering Control Valve (Boom) - Test..432
Lowering Control Valve (Stick) - Test..436
RENR1108 - Schematic (312B Excavator Hydraulic System)..440
Main..441
Collage..443
RENR1111 - Schematic (312B Excavators Single Action; One Pump Hydraulic System (Attachment))..473
Main..474
Collage..476
RENR1112 - Schematic (312; 312B and 312B L Excavators Medium Pressure Hydraulic System (Attachment))..491
Main..492
Collage..494
RENR1113 - Disassembly and Assembly (312B Excavator Machine Systems)..509
Duo-Cone Conventional Seals - Install..514
Hydraulic System Pressure - Release..527
Bucket - Remove..532
Bucket - Install..536
Bucket Linkage - Remove..541
Bucket Linkage Bearings and Seals - Remove..544
Bucket Linkage Bearings and Seals - Install..547
Bucket Linkage - Install..551
Bucket Cylinder - Remove..555
Bucket Cylinder - Disassemble..558
Bucket Cylinder - Assemble..561
Bucket Cylinder - Install..564
Stick Cylinder - Remove..568
Stick Cylinder - Disassemble..571
Stick Cylinder - Assemble..574
Stick Cylinder - Install..577
Stick - Remove..580
Stick Bearings and Seals - Remove..583
Stick Bearings and Seals - Install..585
Stick - Install..588
Boom Lowering Control Valve - Remove..591
Boom Lowering Control Valve - Disassemble..593
Boom Lowering Control Valve - Assemble..597
Boom Lowering Control Valve - Install..601
Boom Cylinder - Remove..603
Boom Cylinder - Disassemble..606
Boom Cylinder - Assemble..609
Boom Cylinder - Install..612
Boom - Remove..615
Boom Bearings and Seals - Remove..620
Boom Bearings and Seals - Install..622
Boom - Install..624
Window Wiper Motor - Remove and Install..629
Cab - Remove..636
Cab - Install..642
Boom Lighting - Remove and Install..648
Counterweight - Remove and Install..650
Fuel Tank - Remove..653
Fuel Tank - Install..658
Seat - Remove and Install..662
Heating and Air Conditioning Unit - Remove..664
Heating and Air Conditioning Unit - Install..671
Blower Motor - Remove and Install..677
In-line Refrigerant Dryer - Remove and Install..682
Damper Assembly Motors - Remove and Install..684
Thermal Fuse - Remove and Install..686
Resistor - Remove and Install..690
Coolant Temperature Sensor - Remove and Install..693
Cab Temperature Sensor - Remove and Install..695
Evaporator Coil Temperature Sensor - Remove and Install..697
Water Valve (Cab Heater) - Remove and Install..700
Heater Core - Remove and Install..704
Evaporator Coil - Remove and Install..708
Air and Temperature Control Module - Remove and Install..713
Track Carrier Roller - Remove..716
Track Carrier Roller - Disassemble..719
Track Carrier Roller - Assemble..723
Track Roller - Remove..728
Track Roller - Disassemble..731
Track Roller - Assemble..735
Track Roller - Install..740
Track - Separate..742
Track - Connect..745
Front Idler and Recoil Spring - Remove..748
Front Idler and Recoil Spring - Install..750
Front Idler - Disassemble..752
Front Idler - Assemble..755
Recoil Spring - Disassemble..759
Recoil Spring - Assemble..764
Track Adjuster - Remove..769
Track Adjuster - Disassemble..771
Track Adjuster - Assemble..773
Track Adjuster - Install..776
Final Drive Sprocket - Remove and Install..778
Travel Brake Valve-Remove..782
Travel Motor - Remove..784
Travel Brake Valve - Disassemble..786
Travel Brake Valve - Assemble..789
Travel Brake Valve - Install..792
Travel Motor - Disassemble..794
Travel Motor - Assemble..798
Travel Motor - Install..802
Final Drive - Remove..804
Final Drive - Disassemble..808
Final Drive - Assemble..824
Final Drive - Install..842
Swivel - Remove..845
Swivel - Disassemble..848
Swivel - Assemble..850
Swivel - Install..852
Swing Motor - Remove..855
Swing Motor - Disassemble..858
Swing Motor - Assemble..868
Swing Motor - Install..877
Swing Drive - Remove..880
Swing Drive - Disassemble..882
Swing Drive - Assemble..889
Undercarriage Frame - Remove..897
Undercarriage Frame - Install..905
Swing Gear and Bearing - Remove and Install..912
Hydraulic Oil Tank - Remove..917
Hydraulic Oil Tank - Install..923
Accumulator (Hydraulic Pilot) - Remove and Install..929
Solenoid Valve (Swing Priority) - Remove and Install..932
Solenoid Valve (Travel Speed) - Remove and Install..936
Solenoid Valve (Two Speed Travel) - Remove and Install..940
Solenoid Valve (Proportional Reducing) - Remove and Install..944
Relief Valve (Pilot) - Remove and Install..948
Gear Pump (Pilot) - Remove and Install..952
Main Hydraulic Pump and Pump Drive Coupling - Remove..955
Main Hydraulic Pump and Pump Drive Coupling - Install..964
Main Hydraulic Pump - Disassemble..975
Main Hydraulic Pump - Assemble..991
Pilot Valve (Joystick) - Remove..1007
Pilot Valve (Joystick) - Disassemble..1011
Pilot Valve (Joystick) - Assemble..1015
Pilot Valve (Joystick) - Install..1019
Pilot Valve (Travel) - Remove..1022
Pilot Valve (Travel) - Disassemble..1025
Pilot Valve (Travel) - Assemble..1028
Pilot Valve (Travel) - Install..1030
Selector Valve (Hydraulic Activation) - Remove..1032
Selector Valve (Hydraulic Activation) - Disassemble..1035
Selector Valve (Hydraulic Activation) - Assemble..1037
Selector Valve (Hydraulic Activation) - Install..1039
Main Control Valve - Remove..1042
Main Control Valve - Disassemble..1048
Main Control Valve - Assemble..1068
Main Control Valve - Install..1089
RENR1115 - Schematic (Caterpillar 312B and 312B L Excavator Electrical System)..1094
Main..1095
Collage..1097
RENR1119 - Disassembly and Assembly (3054 Engine Supplement for 312B and 312B L Excavators)..1117
Hydraulic System Pressure - Release..1118
Alternator - Remove and Install..1119
Electric Starting Motor - Remove and Install..1122
Governor Control Motor - Remove and Install..1124
Fuel Filter (Primary) and Fuel Filter Base - Remove and Install..1128
Water Separator - Remove and Install..1131
Engine Oil Level Gauge (Dipstick) - Remove and Install..1133
Engine Oil Filter and Oil Filter Base - Remove and Install..1136
Air Cleaner - Remove and Install..1139
Muffler - Remove and Install..1142
Turbocharger - Remove and Install..1145
Expansion Tank - Remove and Install..1148
Radiator and Hydraulic Oil Cooler - Remove..1150
Radiator and Hydraulic Oil Cooler - Install..1153
V-Belts - Remove and Install..1156
Fan Guard - Remove and Install..1158
Fan - Remove and Install..1160
Water Pump - Remove..1163
Water Pump - Install..1166
Crankcase Breather - Remove and Install..1168
Hood - Remove and Install..1171
Engine and Piston Pump - Remove..1174
Engine and Piston Pump - Install..1180
RENR1976 - Specifications (312B-5090B; M325B; W330B and W345B Series II Excavators Air Conditioning and Heating)..1186
Pressure Switch (Refrigerant Pressure Cutoff)..1187
Air Conditioner Lines..1188
System Capacities for Refrigerant (Excavators) - 312B-5090B..1193
RENR1976 - Systems Operation (312B-5090B; M325B; W330B and W345B Series II Excavators Air Conditioning and Heating)..1198
General Information..1199
Air Conditioning and Heating System Schematic..1203
Refrigerant Compressor..1208
Refrigerant Relief Valve..1212
Refrigerant Condenser..1213
In-line Refrigerant Dryer..1216
Evaporator Coil..1218
Refrigerant Accumulator..1220
Blower Motor..1222
Actuator Motor (Damper Assembly) - 204-3560 Control Gp..1223
Actuator Motor (Damper Assembly) - 150-1387 and 159-3665 Control Gp..1225
Actuator Motor (Water Valve) - 150-1387 Control Gp..1227
Actuator Motor (Water Valve) - 204-3560 Control Gp..1230
Control Panel - Automatic Temperature Control Unit (If Equipped)..1233
Control Panel - Automatic Temperature Control Unit..1240
Control Module - Heater and Air Conditioning Unit..1247
Speed Control - Speed Controller for the Fan..1253
Air Conditioning System Schematic..1254
Heater System (Cab)..1255
Heater System (Cab) - Manually Controlled System (If Equipped)..1257
Heater Core (Cab)..1260
Heating System Schematic..1262
RENR1976 - Testing and Adjusting (312B-5090B; M325B; W330B and W345B Series II Excavators Air Conditioning and Heating)..1263
General Troubleshooting Information..1265
Visual Inspection..1268
Troubleshooting Faults With Service Codes - 150-1387 and 159-3665 Control Gp..1270
Troubleshooting Air Conditioner Control - Control Parameters..1281
Air Conditioning System Troubleshooting - Automatic Air and Heat (150-1387 and 159-3665 Control Gp)..1286
Air Conditioning System Schematic - 220-0171 Air Conditioner Gp ( 204-3560 Control Gp)(365B and 385B)..1295
Air Conditioning System Schematic - Air conditioning System Schematic (Air Conditioner and Heater Gp (150-1387 Control Gp) (312B through 345B; 5090B and 5110B)..1296
Air Conditioning System Schematic - Cab Harness to Compressor ( 312B through 345B; 5090B and 5110B)..1299
Heating System Troubleshooting - Manually Controlled System (If Equipped)..1302
Heating System Schematic - Manually Controlled System (If Equipped)..1309
Required Tools..1311
Refrigerant Recovery..1313
Manifold Gauge Set (Refrigerant) - Install..1317
Refrigerant System - Evacuate..1320
Refrigerant System - Flush..1326
Refrigerant Leakage - Test..1329
Refrigerant Compressor Oil - Check..1332
Refrigerant System - Charge..1335
Manifold Gauge Set (Refrigerant) - Remove..1349
Solenoid-Activated Clutch (Refrigerant Compressor) - Test..1352
Pressure Switch (Refrigerant Pressure Cutoff) - Test..1355
Blower Motor - Test..1357
Actuator Motor - Test - 150-1387 and 159-3665 Control Gp..1360
Water Valve - Test..1362
Temperature Sensor - Test..1366
Sunlight Sensor - Test..1370
Control Panel - Test - Automatic Temperature Control..1373
Control Module - Test - 150-1387 and 159-3665 Control Gp..1376
Speed Control - Test..1382
V-Belt - Test..1385
RENR1998 - Systems Operation (308B; 311B; 312B; 315B; 317B; 318B; 320B; 322B; 325B; 330B; M325B and W330B Excavators Engine and Pump Control)..1391
Document Effectivity..1392
General Information (Electronic Control System)..1394
Normal Operation..1396
Power Mode Operation..1398
Automatic Engine Control..1402
One Touch Low Idle..1403
Work Mode..1404
Additional Functions..1408
Engine and Hydraulic Pump Controller..1412
Operator Monitor..1417
Switches..1420
Sensors..1426
Senders..1429
Solenoid Valves..1432
Governor Actuator Control..1433
Related Components..1434
RENR1998 - Testing and Adjusting (308B; 311B; 312B; 315B; 317B; 318B; 320B; 322B; 325B; 330B; M325B and W330B Excavators Engine and Pump Control)..1436
General Information..1439
Service Tools..1440
Electrical Components And Connector Locations..1442
Harness and Wire Identification..1443
Using Service Mode..1445
Parameter Status Checks..1451
Real Time Error Codes..1456
Error Log..1460
Initial Troubleshooting Procedure..1462
Troubleshooting Diagnostic Codes..1463
No Power Supply to Controller - Troubleshoot..1469
Communication Problem Between Controller and Monitor - Troubleshoot - A201; A202 And A203..1482
Monitor Is Abnormal - Troubleshoot - 3201..1484
Fuel Gauge Indication Is Abnormal - Troubleshoot - 420A And 420B..1489
Engine Coolant Overheat Indicator Comes On - Troubleshoot - 1302..1494
Engine Coolant Temperature Gauge Indication Is Abnormal - Troubleshoot - 4202..1495
Hydraulic Oil Temperature Alarm Indicator Comes On - Troubleshoot - 1303..1500
Hydraulic Oil Temperature Gauge Indication Is Abnormal - Troubleshoot - 4203..1502
Engine Oil Pressure Alarm Indicator Comes On - Troubleshoot - 1301..1509
Engine Oil Pressure Alarm Indicator Is Abnormal - Troubleshoot..1510
Clogged Air Filter Indicator Comes On - Troubleshoot - 1304..1514
Clogged Air Filter Indicator Is Abnormal - Troubleshoot..1515
Engine Coolant Level Indicator Is Abnormal - Troubleshoot..1519
Hydraulic Oil Level Indicator Is Abnormal - Troubleshoot..1523
Engine Oil Level Indicator Is Abnormal - Troubleshoot..1527
Hydraulic Oil Filter Indicator Is Abnormal - Troubleshoot..1531
Charge Alert Indicator Comes On While Engine Is Running - Troubleshoot - 4301..1536
Check of Speed Sensor - Troubleshoot - 4201 And 4302..1538
Battery Voltage Is Abnormal - Troubleshoot - 1305; 4101; 420C And 420D..1541
Engine Speed Dial Does Not Work - Troubleshoot - 420E And 2303..1545
Low Idle Switch Does Not Work - Troubleshoot..1553
AEC Is Abnormal - Troubleshoot..1556
Check of Feedback Signal From Governor Actuator - Troubleshoot - 2201; 2202; 2301 And 2302..1558
Controllability Is Bad in Boom Priority Mode - Troubleshoot - 4105..1562
Stick Moves Slowly - Troubleshoot - 4106..1568
Swing Torque Is Weak in Swing Priority Mode - Troubleshoot - 4105..1570
Travel Alarm Is Abnormal - Troubleshoot - 4108..1574
Automatic Travel Speed Change Is Abnormal - Troubleshoot - 4107; 4204 And 4207..1580
Swing Is Inoperable - Troubleshoot - 410A..1590
Check Overcurrent at Proportional Reducing Valve - Troubleshoot - 4102..1602
Check Open Circuit at Proportional Reducing Valve - Troubleshoot - 4103..1604
Check Short Circuit of Proportional Reducing Valve to Battery Voltage - Troubleshoot..1606
Calibration Data Error - Troubleshoot - 2304..1609
Engine Stalls - Troubleshoot - 4303..1610
Troubleshooting Undiagnosed Problems..1611
Parameter - Adjust..1614
Hydraulic Hammer - Adjust..1620
Engine Speed Dial Setting - Check..1629
Digital Output On_Off - Test..1631
Governor Actuator Sweep - Test..1634
Governor Actuator - Replace..1636
Governor Actuator - Calibrate..1640
Proportional Reducing Valve Sweep - Test..1644
Proportional Reducing Valve - Calibrate..1646
Speed Sensor - Replace..1649
Controller - Replace..1651
Controller Connector Contact Identification..1652
Controller Input and Output Values..1654
System Schematic..1659
RENR2969 - Schematic (312B Excavators Double Action; One Pump (HAB) Hydraulic System (Attachment))..1662
Main..1663
Collage..1665
SENR9223 - Disassembly and Assembly (SUPPLEMENT for 311B; 312B & 312B L EXCAVATORS - 3064 ENGINE)..1680
Introduction..1681
Air Cleaner..1682
Refrigerant Air Compressor V-Belt..1684
Refrigerant Compressor..1686
Air Heater..1688
Alternator V-Belts..1690
Alternator..1691
Refrigerant Condenser..1694
Refrigerant Dryer..1696
Engine..1698
Engine & Main Hydraulic Pump Separation & Connection..1718
Main Hydraulic Pump..1720
Engine Oil Filter & Oil Filter Base..1730
Fan..1734
Fan Guards..1736
Fuel Filter & Fuel Filter Base..1738
Fuel Priming Pump..1740
Governor Control Motor..1742
Engine Hood Assembly..1744
Muffler..1746
Hydraulic Oil Cooler..1748
Radiator..1751
Electric Starting Motor..1753
Turbocharger..1755
Water Pump..1760
Water Temperature Regulator..1765
SENR9225 - Specifications (311B; 312B & 312B L EXCAVATORS HYDRAULIC ATTACHMENTS)..1767
Introduction..1768
Bucket Adjuster 4I-6914..1769
Bucket Linkage 134-8862..1770
Booms..1772
Sticks..1776
Buckets..1786
Sidecutter..1791
Bucket Cylinder..1792
Stick Cylinders..1794
Boom Cylinders..1797
Boom Lines..1800
Stick Lines..1801
Auxiliary Hydraulic Lines..1806
Bucket Cylinder Lines..1813
Stick Cylinder Lines..1814
Boom Cylinder Lines..1816
Front Lines..1818
Pilot Lines..1822
Return And Filter Lines..1828
Check Valves..1830
Pilot Valves..1832
Relief Pilot Valves..1838
Flow Control Valve..1840
SENR9227 - Specifications (311B and 312B Excavators Hydraulic System)..1841
General Information..1842
Specification - 312B..1844
SENR9227 - Testing and Adjusting (311B and 312B Excavators Hydraulic System)..1847
General Testing and Adjusting Information..1848
Visual Inspection..1849
Hydraulic System Pressure - Release..1850
Air (Main Hydraulic Pump) - Purge..1855
Operational Checks - 312B and 312B L..1857
Swing Bearing Movement - Measure..1875
Pressure Specifications - 312B and 312B L..1881
Required Tools..1887
Relief Valve (Pilot) - Test and Adjust..1889
Relief Valve (Main) - Test and Adjust..1891
Relief Valve (Travel Motor) - Test and Adjust - 312B and 312B L..1895
Relief Valve (Line) - Test and Adjust - 312B and 312B L..1900
Relief Valve (Swing) - Test and Adjust..1908
Piston Pump (Main) - Test - 312B and 312B L..1912
Pump Control (Output Flow) - Adjust..1926
Pump Control (Negative Flow) - Test - 312B and 312B L..1928
Pump Control (Negative Flow) - Adjust - 312B and 312B L..1938
Swing Motor - Test - Measurement of Case Drain Oil..1940
Gear Pump (Pilot) - Test - 312B and 312B L..1942
Travel Motor - Test - 312B and 312B L Measurement of Case Drain Oil..1947
SENR9228 - Systems Operation (311B, 312B & 312B L EXCAVATOR ATTACHMENTS)..1950
SENR9228 - Testing And Adjusting (311B, 312B & 312B L EXCAVATOR ATTACHMENTS)..1977
SENR9235 - Disassembly and Assembly (311B; 312B & 312B L EXCAVATORS MACHINE SYSTEMS)..2000
Duo-Cone Seals..2002
Bucket..2010
Bucket Linkage Group..2015
Bucket Cylinder..2021
Stick Cylinder..2028
Stick..2036
Boom Cylinders..2041
Boom..2050
Counterweight..2056
Fuel Tank..2057
Seat Assembly..2060
Cab..2061
Track Carrier Rollers..2068
Track Rollers..2076
Track Assemblies..2082
Front Idlers & Recoil Springs..2086
Front Idlers..2088
Recoil Springs..2093
Hydraulic Track Adjusters..2098
Final Drive Sprockets..2101
Travel Motor & Final Drive..2103
Swivel Joint..2137
Swing Motor..2142
Swing Drive..2157
Undercarriage Frame Assembly..2166
Swing Gear & Bearing..2173
Hydraulic Oil Tank..2176
Pilot Control Valves (Travel)..2184
Hydraulic Activation Control Valve..2189
Pilot Control Valves (Implement)..2197
Solenoid Valves..2205
Proportional Reducing Valve..2207
Pilot Relief Valve..2210
Pilot Pump..2212
Hydraulic Accumulator..2214
Check Valve..2216
Main Control Valve..2228
Main Hydraulic Pump & Pump Drive Coupling..2298
Main Hydraulic Pump..2309
Hydraulic Oil Filter Group..2367
Heating & Air Conditioning Unit..2370
SENR9236 - Schematic (311B and 312B Excavator Electrical System)..2389
Caterpillar Excavator 311B, 312B & 312B L Repair Service Manual
