Case CX350D Service Manual
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Case CX350D Service Manual

Crawler excavator
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CX350D
CX370D
Crawler Excavator
SERVICE MANUAL
Part number 51481238
English
May 2018
© 2018 CNH Industrial Italia S.p.A. All Rights Reserved.

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  • Page 1 CX350D CX370D Crawler Excavator SERVICE MANUAL Part number 51481238 English May 2018 © 2018 CNH Industrial Italia S.p.A. All Rights Reserved.
  • Page 2 SERVICE MANUAL CX350D Crawler excavators LC version (TIER4 FINAL) - EU Market , CX350D Crawler excavators LC version (TIER4 FINAL) - MEA Market, CX350D Crawler excavators NLC version (TIER4 FINAL) - EU Market , CX370D Crawler excavators LC triple articulation version (Tier 4 Final) - EU Market, CX370D...
  • Page 3 Contents INTRODUCTION Engine..................10 [10.001] Engine and crankcase ............. 10.1 [10.102] Pan and covers .
  • Page 4 [35.357] Pilot system ............... . 35.7 [35.355] Hydraulic hand control .
  • Page 5 [55.302] Battery................55.7 [55.202] Cold start aid .
  • Page 6 Platform, cab, bodywork, and decals ..........90 [90.154] Cab doors and hatches ............90.1 [90.150] Cab .
  • Page 7 51481238 06/06/2018 Find manuals at https://best-manuals.com...
  • Page 8 INTRODUCTION 51481238 06/06/2018 Find manuals at https://best-manuals.com...

  • Page 9: Table Of Contents

    Contents INTRODUCTION Foreword - Important notice regarding equipment servicing ........4 Safety rules .
  • Page 10 Conversion factors ................134 Fluids and lubricants .

  • Page 11: Foreword - Important Notice Regarding Equipment Servicing

    In any case, no warranty is given or attributed on the product manufactured or marketed by the manufacturer in case of damages caused by parts and/or components not approved by the manufacturer.

  • Page 12: Safety Rules

    INTRODUCTION Safety rules Personal safety This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible death or injury. Throughout this manual you will find the signal words DANGER, WARNING, and CAUTION followed by special in- structions.

  • Page 13: Safety Rules - General Information

    Service parts Install CASE CONSTRUCTION genuine service parts. When placing an order, check the parts catalog. It contains the CASE CONSTRUCTION genuine part numbers. Any breakdowns arising from the installation of non-genuine parts are not covered by the warranty. Lubricants (fuel, hydraulic oil) Use the oil from the specified company or specified in the operator's manual or service Manual.

  • Page 14: Safety Rules - Personal Safety

    Check the operating methods in a safe location before starting the actual work. Understand the machine operations well, then operate in compliance with all service-related laws and regulations. The operator's manual can be purchased at your CASE CONSTRUCTION dealer. WARNING: Working with sloppy clothes or clothes with which safety cannot be ensured leads to damage to the machine and injury to the operator.
  • Page 15 INTRODUCTION WARNING: Check that there is no one in the surroundings before draining the pressure from hydraulic circuits during machine hydraulic cylinder inspection. WARNING: Use gloves when handling high-temperature parts. WARNING: Bring the lower parts or attachments in contact with the ground before inspecting or repairing them. WARNING: Check that hoses and tubes are securely connected.

  • Page 16: Safety Rules - Rops Judgment

    Weight For each class, the following weight shall not be exceeded. If the weight is exceeded, a cab may become damaged in case of a rollover, causing the operator to die or become severely disabled. It is not applicable beyond the criterion.
  • Page 17 INTRODUCTION 3. Prohibitions • Such modification as reduces the strength of the platform where the ROPS cab is installed. (Such action or modi- fication as reduces the function of the retaining anchor in the left rear of the cab) • Such modification as affects the ROPS strength of the ROPS cab. All changes (grinding, welding, drilling, removal, etc.) Modification prohibited (Red components) are prohibited.

  • Page 18: Safety Rules - Ecology And The Environment

    Improper disposal of batteries can contaminate the soil, groundwater, and waterways. CASE CONSTRUCTION strongly recommends that you return all used batteries to a CASE CONSTRUCTION dealer, who will dispose of the used batteries or recycle the used batteries properly.

  • Page 19: Torque - Bolt And Nut

    INTRODUCTION Torque - Bolt and nut • Tighten alternating between left and right and top and bottom so that uniform tightening force is applied. LPIL12CX00005EA • If L ® was used on a removed bolt (there is something white sticking to the bolt when it is removed), clean the OCTITE old L ®...

  • Page 20: Torque - Special Torque Setting

    INTRODUCTION Torque - Special torque setting Nominal bolt Retightening location Tightening torque Code Wrench diameter 902 – 1051 N·m (665.28 – 775.18 lb ft) Travel motor 36 mm Drive sprocket 521 – 608 N·m (384.27 – 448.44 lb ft) 30 mm Take-up roller 24 mm 267 –...
  • Page 21 INTRODUCTION SMIL18CEX0071H 51481238 06/06/2018...
  • Page 22 INTRODUCTION SMIL18CEX0072GB 51481238 06/06/2018...
  • Page 23 INTRODUCTION SMIL18CEX0073GB 51481238 06/06/2018...

  • Page 24: Basic Instructions - Shop And Assembly

    Only use CNH Original Parts or CASE CONSTRUCTION Original Parts. Only genuine spare parts guarantee the same quality, duration, and safety as original parts, as they are the same parts that are assembled during standard production. Only CNH Original Parts or CASE CONSTRUCTION Original Parts can offer this guarantee.
  • Page 25 W0111A Special tools The special tools that CASE CONSTRUCTION suggests and illustrate in this manual have been specifically re- searched and designed for use with CASE CONSTRUCTION machines. The special tools are essential for reliable repair operations. The special tools are accurately built and rigorously tested to offer efficient and long-lasting oper- ation.

  • Page 26: Hydraulic Contamination

    INTRODUCTION Hydraulic contamination Contamination in the hydraulic system is a major cause of the malfunction of hydraulic components. Contamination is any foreign material in the hydraulic oil. Contamination can enter the hydraulic system in several ways: • When you drain the oil or disconnect any line •...

  • Page 27: General Specification

    INTRODUCTION General specification CX350D Crawler excavators LC version (TIER4 FINAL) - EU Market CX350D Crawler excavators LC version (TIER4 FINAL) - MEA Market Engine Water-cooled, 4-cycle diesel, 6-cylinder in line, High pressure common Type rail system (electric control), Turbocharger with air cooled intercooler,...
  • Page 28 INTRODUCTION Oil cooler capacity 52.9 kW (45,500 kcal/h) fin type Corrugated fin (wavy type) fin space 1.75 mm (0.06890 in) Intercooler capacity 25.7 kW (22,100 kcal/h) fin type Corrugated fin (wavy type) fin space 2.5 mm (0.0984 in) Fuel cooler capacity 1.7 kW (1,410 kcal/h) fin type Corrugated fin (wavy type)
  • Page 29 INTRODUCTION Operator environment Operator's cab Smooth and round shape design cab, fabricated by press work Safety glass for all windows Shock-less cab suspension by 4-point fluid mounting Sliding front window with auto lock Built-in type full-color LCD monitor display Membrane switch on monitor display Windshield wiper &...
  • Page 30 INTRODUCTION Ground pressure 0.067 MPa (9.718 psi) with 3.25 m (10.6627 ft) Arm, 1.4 m³ Bucket, 600 mm (23.622 in) grouser shoe Digging force (with 1.4 m³ bucket) ( ISO 6015 ) 3.25 m (10.6627 ft) 2.21 m (7.2507 ft) 2.63 m (8.6286 ft) 4.04 m (13.2546 ft) Arm digging force...
  • Page 31 INTRODUCTION 7340 mm 6300 mm 6720 mm 8140 mm Max. digging depth (288.976 in) (248.031 in) (264.567 in) (320.472 in) 10380 mm 9830 mm 10280 mm 10650 mm Max. digging height (408.661 in) (387.008 in) (404.724 in) (419.291 in) 7240 mm 6730 mm 7110 mm 7530 mm...

  • Page 32: General Specification

    INTRODUCTION General specification CX350D Crawler excavators NLC version (TIER4 FINAL) - EU Market Engine Water-cooled, 4-cycle diesel, 6-cylinder in line, High pressure common Type rail system (electric control), Turbocharger with air cooled intercooler, SCR system Model ISUZU AQ-6HK1X Rated flywheel horse power...
  • Page 33 INTRODUCTION Oil cooler capacity 52.9 kW (45,500 kcal/h) fin type Corrugated fin (wavy type) fin space 1.75 mm (0.06890 in) Intercooler capacity 25.7 kW (22,100 kcal/h) fin type Corrugated fin (wavy type) fin space 2.5 mm (0.0984 in) Fuel cooler capacity 1.7 kW (1,410 kcal/h) fin type Corrugated fin (wavy type)
  • Page 34 INTRODUCTION Operator environment Operator's cab Smooth and round shape design cab, fabricated by press work Safety glass for all windows Shock-less cab suspension by 4-point fluid mounting Sliding front window with auto lock Built-in type full-color LCD monitor display Membrane switch on monitor display Windshield wiper &...
  • Page 35 INTRODUCTION Ground pressure 0.067 MPa (9.718 psi) with 3.25 m (10.6627 ft) Arm, 1.4 m³ Bucket, 600 mm (23.622 in) grouser shoe Digging force (with 1.4 m³ bucket) ( ISO 6015 ) 3.25 m (10.6627 ft) 2.21 m (7.2507 ft) 2.63 m (8.6286 ft) 4.04 m (13.2546 ft) Arm digging force...
  • Page 36 INTRODUCTION 10380 mm 9830 mm 10280 mm 10650 mm Max. digging height (408.661 in) (387.008 in) (404.724 in) (419.291 in) 7240 mm 6730 mm 7110 mm 7530 mm Max. dumping height (285.039 in) (264.961 in) (279.921 in) (296.457 in) 51481238 06/06/2018...

  • Page 37: General Specification

    INTRODUCTION General specification CX370D Crawler excavators LC version (TIER4 FINAL) - EU Market CX370D Crawler excavators LC version (TIER4 FINAL) - MEA Market Engine Water-cooled, 4-cycle diesel, 6-cylinder in line, High pressure common Type rail system (electric control), Turbocharger with air cooled intercooler, SCR system Model ISUZU AQ-6HK1X...
  • Page 38 INTRODUCTION Oil cooler capacity 52.9 kW (45,500 kcal/h) fin type Corrugated fin (wavy type) fin space 1.75 mm (0.06890 in) Intercooler capacity 25.7 kW (22,100 kcal/h) fin type Corrugated fin (wavy type) fin space 2.5 mm (0.0984 in) Fuel cooler capacity 1.7 kW (1,410 kcal/h) fin type Corrugated fin (wavy type)
  • Page 39 INTRODUCTION Operator environment Operator's cab Smooth and round shape design cab, fabricated by press work Safety glass for all windows Shock-less cab suspension by 4-point fluid mounting Sliding front window with auto lock Built-in type full-color LCD monitor display Membrane switch on monitor display Windshield wiper &...
  • Page 40 INTRODUCTION Ground pressure 0.071 MPa (10.299 psi) with 3.25 m (10.6627 ft) Arm, 1.4 m³ Bucket, 600 mm (23.622 in) grouser shoe Digging force (with 1.4 m³ bucket) ( ISO 6015 ) 3.25 m (10.6627 ft) Arm 2.21 m (7.2507 ft) Arm 2.63 m (8.6286 ft) Arm Arm digging force 164.5 kN (36981.1 lb)

  • Page 41: General Specification

    INTRODUCTION General specification CX370D Crawler excavators NLC version (TIER4 FINAL) - EU Market Engine Water-cooled, 4-cycle diesel, 6-cylinder in line, High pressure common Type rail system (electric control), Turbocharger with air cooled intercooler, SCR system Model ISUZU AQ-6HK1X Rated flywheel horse power 200 kW (272 Hp) at 1900 RPM ISO 9249 ISO 14396...
  • Page 42 INTRODUCTION Oil cooler capacity 52.9 kW (45,500 kcal/h) fin type Corrugated fin (wavy type) fin space 1.75 mm (0.06890 in) Intercooler capacity 25.7 kW (22,100 kcal/h) fin type Corrugated fin (wavy type) fin space 2.5 mm (0.0984 in) Fuel cooler capacity 1.7 kW (1,410 kcal/h) fin type Corrugated fin (wavy type)
  • Page 43 INTRODUCTION Operator environment Operator's cab Smooth and round shape design cab, fabricated by press work Safety glass for all windows Shock-less cab suspension by 4-point fluid mounting Sliding front window with auto lock Built-in type full-color LCD monitor display Membrane switch on monitor display Windshield wiper &...
  • Page 44 INTRODUCTION Ground pressure 0.071 MPa (10.299 psi) with 3.25 m (10.6627 ft) Arm, 1.4 m³ Bucket, 600 mm (23.622 in) grouser shoe Digging force (with 1.4 m³ bucket) ( ISO 6015 ) 3.25 m (10.6627 ft) Arm 2.21 m (7.2507 ft) Arm 2.63 m (8.6286 ft) Arm Arm digging force 164.5 kN (36981.1 lb)

  • Page 45: General Specification

    INTRODUCTION General specification CX370D Crawler excavators LC triple articulation version (Tier 4 Final) - EU Market Engine Water-cooled, 4-cycle diesel, 6-cylinder in line, High pressure common Type rail system (electric control), Turbocharger with air cooled intercooler, SCR system Model ISUZU AQ-6HK1X Rated flywheel horse power 200 kW (272 Hp) at 1900 RPM ISO 9249...
  • Page 46 INTRODUCTION fin space 1.75 mm (0.06890 in) Long life coolant Coolant 55 % , Water 45 % Oil cooler capacity 52.9 kW (45,500 kcal/h) fin type Corrugated fin (wavy type) fin space 1.75 mm (0.06890 in) Intercooler capacity 25.7 kW (22,100 kcal/h) fin type Corrugated fin (wavy type) fin space...
  • Page 47 INTRODUCTION Operator environment Operator's cab Smooth and round shape design cab, fabricated by press work Safety glass for all windows Shock-less cab suspension by 4-point fluid mounting Sliding front window with auto lock Built-in type full-color LCD monitor display Membrane switch on monitor display Windshield wiper &...
  • Page 48 INTRODUCTION Ground pressure 0.071 MPa (10.299 psi) with 3.25 m (10.6627 ft) Arm, 1.4 m³ Bucket, 600 mm (23.622 in) grouser shoe Digging force (with 1.4 m³ bucket) ( ISO 6015 ) 3.25 m (10.6627 ft) Arm 2.63 m (8.6286 ft) Arm Arm digging force 164.5 kN (36981.1 lb) 194.7 kN (43770.3 lb)

  • Page 49: General Specification

    INTRODUCTION General specification CX370D Crawler excavators NLC triple articulation version (Tier 4 Final) - EU Market Engine Water-cooled, 4-cycle diesel, 6-cylinder in line, High pressure common Type rail system (electric control), Turbocharger with air cooled intercooler, SCR system Model ISUZU AQ-6HK1X Rated flywheel horse power 200 kW (272 Hp) at 1900 RPM ISO 9249...
  • Page 50 INTRODUCTION fin space 1.75 mm (0.06890 in) Long life coolant Coolant 55 % , Water 45 % Oil cooler capacity 52.9 kW (45,500 kcal/h) fin type Corrugated fin (wavy type) fin space 1.75 mm (0.06890 in) Intercooler capacity 25.7 kW (22,100 kcal/h) fin type Corrugated fin (wavy type) fin space...
  • Page 51 INTRODUCTION Operator environment Operator's cab Smooth and round shape design cab, fabricated by press work Safety glass for all windows Shock-less cab suspension by 4-point fluid mounting Sliding front window with auto lock Built-in type full-color LCD monitor display Membrane switch on monitor display Windshield wiper &...
  • Page 52 INTRODUCTION Ground pressure 0.071 MPa (10.299 psi) with 3.25 m (10.6627 ft) Arm, 1.4 m³ Bucket, 600 mm (23.622 in) grouser shoe Digging force (with 1.4 m³ bucket) ( ISO 6015 ) 3.25 m (10.6627 ft) Arm 2.63 m (8.6286 ft) Arm Arm digging force 164.5 kN (36981.1 lb) 194.7 kN (43770.3 lb)

  • Page 53: General Specification - Main Equipment

    INTRODUCTION General specification - Main equipment CX350D Crawler excavators LC version (TIER4 FINAL) - EU Market CX350D Crawler excavators LC version (TIER4 FINAL) - MEA Market Lower component Travel unit Manufacturer Nabtesco Corporation Motor type Variable displacement piston motor Automatic 2-speed switchover with parking brake Absorption amount 290.7 –...
  • Page 54 INTRODUCTION Weight or quantity 800 grouser 2618 kg (5771.702 lb) Link 1 pair Shoe Bolt 850 grouser 2735 kg (6029.643 lb) Link 1 pair Shoe Bolt 900 grouser 2817 kg (6210.422 lb) Link 1 pair Shoe Bolt Upper component Swing unit Swing motor assembly Swing motor Manufacturer...
  • Page 55 INTRODUCTION Engine-related Engine Engine model name Isuzu 6HK1X diesel engine 4-cycle, water-cooled, overhead camshaft, vertical in-line, direct Engine type injection type (electronics control type) Number of cylinders - diameter - stroke 6 - ∅ 115 mm (4.53 in) - 125 mm (4.92 in) Total displacement 7.79 l (7.790 US gal) 16.5...
  • Page 56 INTRODUCTION Hydraulic device Hydraulic pump Manufacturer Kawasaki Heavy Industries, Ltd. Main pump Pump type Double variable displacement piston pump Displacement 160 cm³/rev (9.764 in³/rev) x 2 Rated 34.3 MPa (4975 psi) Operating pressure Maximum 37.3 MPa (5410.4 psi) Input revolution speed 1900 RPM 304 L/min (80.31 US gpm) x 2 (at Pd = 3 MPa (435 psi) 1900 RPM)
  • Page 57 INTRODUCTION Control-related Control valve Standard Manufacturer KYB Corporation Maximum flow 300 L/min (79.252 US gpm) (at 1900 RPM) 34.3 MPa (4975.22 psi) Main relief set pressure (Upon pressure boost) 37.3 MPa (5410.36 psi) Boom up, arm, 39.2 MPa (5685.96 psi) bucket Overload set pressure Boom down...
  • Page 58 INTRODUCTION Boom up, arm, bucket, 39.2 MPa (5685.96 psi) positioning Overload set pressure Boom down 27.4 MPa (3974.37 psi) Attachment 2 22.6 MPa (3278.13 psi) Foot relief set pressure 2.55 MPa (369.88 psi) Pressure boost circuit Straight travel circuit Boom-up and arm-out/in 2 pumps internal flow Boom-down and arm-in load holding circuit Boom-down and bucket-close regenerative circuit Function...
  • Page 59 INTRODUCTION Operation remote control valve control diagram SMIL14CEX2902EB Push rod stroke [mm (in)] Secondary pressure Operating angle [deg.] Independent operating torque (Port 1) Secondary pressure [MPa (psi)] Independent operating torque (Port 3) Operating torque [Nm] SMIL14CEX2903EB Push rod stroke [mm (in)] Operating torque [Nm] Operating angle [deg.] Secondary pressure...
  • Page 60 INTRODUCTION Option remote control valve control diagram SMIL18CEX0074EA Secondary pressure Operating torque [Nm] Independent operating torque Pedal operating angle [deg.] Secondary pressure [MPa] Cushion valve (with heat circuit, shuttle valve) Manufacturer KYB-YS Corporation Operating pressure 4.41 MPa (639.67 psi) A - B side ∅...
  • Page 61 INTRODUCTION Port D Backward left Port T Drain port G1/2 Port P Pilot port G1/4 Weight 55.5 kg (122.3566 lb) Reducing valve (6 stack proportional valve) Manufacturer Yuken Kogyo Co., Ltd. Valve Rated pressure 4.5 MPa (652.72 psi) Rated flow rate 30 L/min (7.93 US gpm) 30 L/min (7.93 US gpm) Maximum flow...

  • Page 62: General Specification - Main Equipment

    INTRODUCTION General specification - Main equipment CX350D Crawler excavators NLC version (TIER4 FINAL) - EU Market Lower component Travel unit Manufacturer Nabtesco Corporation Motor type Variable displacement piston motor Automatic 2-speed switchover with parking brake Absorption amount 290.7 – 170.1 cm³/rev (17.7 – 10.4 in³/rev) Operating pressure 34.3 MPa (4975 psi)
  • Page 63 INTRODUCTION Weight or quantity Link 1 pair Shoe Bolt Upper component Swing unit Swing motor assembly Swing motor Manufacturer Kawasaki Precision Machinery Ltd. Motor type Fixed displacement piston motor With parking brake Absorption amount 180.1 cm³/rev (10.99 in³/rev) Operating pressure 30.4 MPa (4409.5 psi) Operating flow 290 L/min (76.6099 US gpm)
  • Page 64 INTRODUCTION Engine-related Engine Engine model name Isuzu 6HK1X diesel engine 4-cycle, water-cooled, overhead camshaft, vertical in-line, direct Engine type injection type (electronics control type) Number of cylinders - diameter - stroke 6 - ∅ 115 mm (4.53 in) - 125 mm (4.92 in) Total displacement 7.79 l (7.790 US gal) 16.5...
  • Page 65 INTRODUCTION Hydraulic device Hydraulic pump Manufacturer Kawasaki Heavy Industries, Ltd. Main pump Pump type Double variable displacement piston pump Displacement 160 cm³/rev (9.764 in³/rev) x 2 Rated 34.3 MPa (4975 psi) Operating pressure Maximum 37.3 MPa (5410.4 psi) Input revolution speed 1900 RPM 304 L/min (80.31 US gpm) x 2 (at Pd = 3 MPa (435 psi) 1900 RPM)
  • Page 66 INTRODUCTION Control-related Control valve Standard Manufacturer KYB Corporation Maximum flow 300 L/min (79.252 US gpm) (at 1900 RPM) Main relief set pressure 34.3 MPa (4975.22 psi) (Upon pressure boost) 37.3 MPa (5410.36 psi) Boom up, arm, 39.2 MPa (5685.96 psi) bucket Overload set pressure Boom down...
  • Page 67 INTRODUCTION Boom up, arm, bucket, 39.2 MPa (5685.96 psi) positioning Overload set pressure Boom down 27.4 MPa (3974.37 psi) Attachment 2 22.6 MPa (3278.13 psi) Foot relief set pressure 2.55 MPa (369.88 psi) Pressure boost circuit Straight travel circuit Boom-up and arm-out/in 2 pumps internal flow Boom-down and arm-in load holding circuit Boom-down and bucket-close regenerative circuit Function...
  • Page 68 INTRODUCTION Operation remote control valve control diagram SMIL14CEX2902EB Push rod stroke [mm (in)] Secondary pressure Operating angle [deg.] Independent operating torque (Port 1) Secondary pressure [MPa (psi)] Independent operating torque (Port 3) Operating torque [Nm] SMIL14CEX2903EB Push rod stroke [mm (in)] Operating torque [Nm] Operating angle [deg.] Secondary pressure...
  • Page 69 INTRODUCTION Option remote control valve control diagram SMIL18CEX0074EA Secondary pressure Operating torque [Nm] Independent operating torque Pedal operating angle [deg.] Secondary pressure [MPa] Cushion valve (with heat circuit, shuttle valve) Manufacturer KYB-YS Corporation Operating pressure 4.41 MPa (639.67 psi) A - B side ∅...
  • Page 70 INTRODUCTION Port D Backward left Port T Drain port G1/2 Port P Pilot port G1/4 Weight 55.5 kg (122.3566 lb) Reducing valve (6 stack proportional valve) Manufacturer Yuken Kogyo Co., Ltd. Valve Rated pressure 4.5 MPa (652.72 psi) Rated flow rate 30 L/min (7.93 US gpm) 30 L/min (7.93 US gpm) Maximum flow...

  • Page 71: General Specification - Main Equipment

    INTRODUCTION General specification - Main equipment CX370D Crawler excavators LC version (TIER4 FINAL) - EU Market CX370D Crawler excavators LC version (TIER4 FINAL) - MEA Market Lower component Travel unit Manufacturer Nabtesco Corporation Motor type Variable displacement piston motor Automatic 2-speed switchover with parking brake Absorption amount 290.7 –...
  • Page 72 INTRODUCTION Weight or quantity 800 grouser 2618 kg (5771.702 lb) Link 1 pair Shoe Bolt Upper component Swing unit Swing motor assembly Swing motor Manufacturer Kawasaki Precision Machinery Ltd. Motor type Fixed displacement piston motor With parking brake Absorption amount 180.1 cm³/rev (10.99 in³/rev) Operating pressure 30.4 MPa (4409.5 psi)
  • Page 73 INTRODUCTION Engine-related Engine Engine model name Isuzu 6HK1X diesel engine 4-cycle, water-cooled, overhead camshaft, vertical in-line, direct Engine type injection type (electronics control type) Number of cylinders - diameter - stroke 6 - ∅ 115 mm (4.53 in) - 125 mm (4.92 in) Total displacement 7.79 l (7.790 US gal) 16.5...
  • Page 74 INTRODUCTION Hydraulic device Hydraulic pump Manufacturer Kawasaki Heavy Industries, Ltd. Main pump Pump type Double variable displacement piston pump Displacement 160 cm³/rev (9.764 in³/rev) x 2 Rated 34.3 MPa (4975 psi) Operating pressure Maximum 37.3 MPa (5410.4 psi) Input revolution speed 1900 RPM 304 L/min (80.31 US gpm) x 2 (at Pd = 3 MPa (435 psi) 1900 RPM)
  • Page 75 INTRODUCTION Control-related Control valve Standard Manufacturer KYB Corporation Maximum flow 300 L/min (79.252 US gpm) (at 1900 RPM) Main relief set pressure 34.3 MPa (4975.22 psi) (Upon pressure boost) 37.3 MPa (5410.36 psi) Boom up, arm, 39.2 MPa (5685.96 psi) bucket Overload set pressure Boom down...
  • Page 76 INTRODUCTION Boom up, arm, bucket, 39.2 MPa (5685.96 psi) positioning Overload set pressure Boom down 27.4 MPa (3974.37 psi) Attachment 2 22.6 MPa (3278.13 psi) Foot relief set pressure 2.55 MPa (369.88 psi) Pressure boost circuit Straight travel circuit Boom-up and arm-out/in 2 pumps internal flow Boom-down and arm-in load holding circuit Boom-down and bucket-close regenerative circuit Function...
  • Page 77 INTRODUCTION Operation remote control valve control diagram SMIL14CEX2902EB Push rod stroke [mm (in)] Secondary pressure Operating angle [deg.] Independent operating torque (Port 1) Secondary pressure [MPa (psi)] Independent operating torque (Port 3) Operating torque [Nm] SMIL14CEX2903EB Push rod stroke [mm (in)] Operating torque [Nm] Operating angle [deg.] Secondary pressure...
  • Page 78 INTRODUCTION Option remote control valve control diagram SMIL18CEX0074EA Secondary pressure Operating torque [Nm] Independent operating torque Pedal operating angle [deg.] Secondary pressure [MPa] Cushion valve (with heat circuit, shuttle valve) Manufacturer KYB-YS Corporation Operating pressure 4.41 MPa (639.67 psi) A - B side ∅...
  • Page 79 INTRODUCTION Port D Backward left Port T Drain port G1/2 Port P Pilot port G1/4 Weight 55.5 kg (122.3566 lb) Reducing valve (6 stack proportional valve) Manufacturer Yuken Kogyo Co., Ltd. Valve Rated pressure 4.5 MPa (652.72 psi) Rated flow rate 30 L/min (7.93 US gpm) 30 L/min (7.93 US gpm) Maximum flow...

  • Page 80: General Specification - Main Equipment

    INTRODUCTION General specification - Main equipment CX370D Crawler excavators NLC version (TIER4 FINAL) - EU Market Lower component Travel unit Manufacturer Nabtesco Corporation Motor type Variable displacement piston motor Automatic 2-speed switchover with parking brake Absorption amount 290.7 – 170.1 cm³/rev (17.7 – 10.4 in³/rev) Operating pressure 34.3 MPa (4975 psi) Operating flow...
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