mycom 4032**C Series Instruction Manual
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mycom 4032**C Series Instruction Manual

Compound 2-stage screw compressor
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Compound 2-stage Screw Compressor
4032
C Instruction Manual
* *
4032XLLLC/4032LLLLC/4032LLLC/4032LLMC/4032LLSC
4032LLC/4032LMC/4032LSC/4032MLC/4032MMC/4032MSC
Before operating, servicing, or inspecting this product, read this manual thoroughly to fully
understand the contents.
Keep this Instruction Manual in a safe, designated place for future reference whenever the
manual is needed.
Specifications of this product
prior notice due to technical improvements, and the like.
4032SLC/4032SMC/4032SSC
CAUTION
and contents of this manual are subject to change without
2201Q4JE-MY-C9-N_2018.01.

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Summary of Contents for mycom 4032**C Series

  • Page 1 2201Q4JE-MY-C9-N_2018.01. Compound 2-stage Screw Compressor 4032 C Instruction Manual 4032XLLLC/4032LLLLC/4032LLLC/4032LLMC/4032LLSC 4032LLC/4032LMC/4032LSC/4032MLC/4032MMC/4032MSC 4032SLC/4032SMC/4032SSC CAUTION Before operating, servicing, or inspecting this product, read this manual thoroughly to fully understand the contents. Keep this Instruction Manual in a safe, designated place for future reference whenever the manual is needed.
  • Page 2 2201Q4JE-MY-C9-N_2018.01. Preface Preface Thank you for purchasing the C-series compound 2-stage screw compressor 4032**C (hereinafter referred to as "this product"). This Instruction Manual (hereinafter referred to as "this manual") provides safety information and operation and maintenance procedures, so that users correctly understand how to handle this product and, as a result, can use it safely and efficiently.
  • Page 3 2201Q4JE-MY-C9-N_2018.01. Warranty and Disclaimer Warranty and Disclaimer Warranty MAYEKAWA shall repair or replace parts of this product for no charge if any failure resulting from defects in design or manufacture occurs, under normal use with the purpose and method that are in accordance with the specifications of this product and this manual, within the warranty period.
  • Page 4 2201Q4JE-MY-C9-N_2018.01. Important Information Important Information Intended Use of This Product This product is a general-purpose screw compressor for refrigeration, cold storage and various gases compression. Do not use this product for any other purposes that are not intended for or which depart from the specifications.
  • Page 5 2201Q4JE-MY-C9-N_2018.01. Important Information Observe the following precautions when performing maintenance work on electrical control.  Electrical maintenance of the product must be performed by certified/qualified personnel and only those educated about the electrical control of the product.  Before servicing or inspecting the electrical equipment or devices, turn "OFF" the motor main power and control power, and perform lockout/tagout to prevent the power from being turned on during work.

  • Page 6: Table Of Contents

    2201Q4JE-MY-C9-N_2018.01. Table of Contents Table of Contents Preface ........................ⅰ Revision History ..................... ⅰ Warranty and Disclaimer ..................ⅱ Important Information .................... ⅲ Intended Use of This Product ................... ⅲ Important Information for Safe Use of This Product ............ⅲ About This Manual ......................
  • Page 7 2201Q4JE-MY-C9-N_2018.01. Table of Contents Mechanisms ....................2-9 2.5.1 Basics of the Screw Compressor ................ 2-9 2.5.2 Suction Process ....................2-9 2.5.3 Compression Process ..................2-10 2.5.4 Discharge Process ..................... 2-10 2.5.5 About Volume Ratio (Vi) ..................2-10 2.5.6 Capacity Control Mechanism ................2-12 2.5.7 Bearing and Balance Piston ................
  • Page 8 2201Q4JE-MY-C9-N_2018.01. Table of Contents Chapter 5 Maintenance and Inspection Precautions for Maintenance and Inspection ..........5-1 Maintenance and Inspection List..............5-3 5.2.1 Daily Management ....................5-3 5.2.2 Periodic Inspection ....................5-5 5.2.3 Guidelines for the Timing of Compressor Overhaul ..........5-6 Compressor Disassembly Preparation ............
  • Page 9 2201Q4JE-MY-C9-N_2018.01. Table of Contents 5.4.12 Rotors and Main Rotor Casing (Low-stage/High-stage) ........5-30 5.4.12.1 Disassembly ....................5-30 5.4.12.2 Inspection ....................5-30 5.4.13 High-stage Bearing Head and Main Bearings ........... 5-31 5.4.13.1 Disassembly ....................5-31 5.4.13.2 Inspection ....................5-31 5.4.14 Low-stage Bearing Head and Main Bearings ............ 5-32 5.4.14.1 Disassembly ....................
  • Page 10 2201Q4JE-MY-C9-N_2018.01. Table of Contents Chapter 6 Troubleshooting 01: Compressor does not start up ................6-1 02: Compressor stops immediately after startup ........... 6-1 03: Unusually low pressure (decrease of suction pressure) ......... 6-2 04: Low oil pressure (low lubricating oil supply pressure) ........6-2 05: Intermediate pressure is unusually high ............

  • Page 11: Chapter 1 Safety

    2201Q4JE-MY-C9-N_2018.01. Chapter 1 Safety Chapter 1 Safety Strict Requirements and Prohibitions 1.1.1 Strict Requirements (Do’s) 1.1.1.1 Do’s on Operation  Make sure to install safety and protective devices on the package unit.  Regularly inspect the safety and protective devices if they function properly. ...

  • Page 12: Do's About Personal Protective Gear

    2201Q4JE-MY-C9-N_2018.01. Chapter 1 Safety  If there are any possibilities of danger during works (especially during cleaning, maintenance and inspection, and troubleshooting), turn "OFF" the motor main power and control power, and perform lockout/tagout.  In the following situations, workers may neglect to perform power source shutoff or lockout/tagout.

  • Page 13: Prohibitions (Don'ts)

    2201Q4JE-MY-C9-N_2018.01. Chapter 1 Safety 1.1.2 Prohibitions (Don’ts)  Do not remove or relocate any safety device, including electrical interfaces.  Do not disable any safety device by short-circuiting or bypassing without any permission.  Do not leave this product unsafe and unattended, by removing a safety cover or some other measures.

  • Page 14: Residual Risks

    2201Q4JE-MY-C9-N_2018.01. Chapter 1 Safety Residual Risks The following information assumes that this product is operated or inspected/maintained while being used in general refrigerating/cold storage/gas compression package units. Note that all hazardous sources cannot be predicted for the applications mentioned. Devise appropriate countermeasures for hazardous sources in your systems. Table 1-2 Hazardous Sources Countermeasures in Countermeasures in...
  • Page 15 2201Q4JE-MY-C9-N_2018.01. Chapter 1 Safety Figure 1-1 Locations of Hazardous Sources (compressor) Compound 2-stage Screw Compressor 4032**C 1.3 Residual Risks...

  • Page 16: Safety Devices

    2201Q4JE-MY-C9-N_2018.01. Chapter 1 Safety Safety Devices For safe use and protection of this product, make sure to attach safety devices to this product in accordance with the regulations and the following instructions. Safety devices cannot be kept in normal condition unless inspected and maintained at regular intervals. Their maintenance and inspection need to be performed as an important part of the maintenance/inspection work project.

  • Page 17: Compressor Protective Devices

    2201Q4JE-MY-C9-N_2018.01. Chapter 1 Safety 1.4.3 Compressor Protective Devices  Be sure to adjust the set values and check operation of the protective devices at the commissioning.  Overview/Function/Purpose These protective devices are used to protect this product.  Protecting from discharge temperature rise (DT) This device activates and stops the compressor operation when the compressor discharge temperature gets equal to or higher than the set value.
  • Page 18 2201Q4JE-MY-C9-N_2018.01. Chapter 1 Safety  Connection Positions and Settings Specify the connection position and setting for each compressor protective device, and make sure to provide users of this product with them. Make sure that the set values do not exceed the operating limits shown in Section 2.3.2 and Table 2-2 in this manual Chapter 2.

  • Page 19: Chapter 2 Compressor Specifications And Structure

    Indicates working fluid (Example: N = Ammonia, F= Fluorocarbon, P = Propane, HE = Helium) There are cases that the symbol indicating the special specification is engraved other than these. In such a case, refer to the specifications of each compressor. 2.1 Overview of MYCOM 4032**C Compound 2-stage Screw Compressor 4032**C...

  • Page 20: Compressor Specifications

    2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure Compressor Specifications 2.3.1 Specifications Table 2-1 4032**C Screw Compressor Specifications (1/2) Model Items X L L L C L L L L C L L L C L L M C L L S C L L C 12320 Product mass...

  • Page 21: Operation Limits

    2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure 2.3.2 Operation Limits Table 2-3 Operation Limits of 4032**C Items Operation Limits Maximum discharge pressure 1.96 −0.080 Minimum suction pressure Maximum intermediate pressure 0.588 Minimum intermediate pressure > Suction pressure Oil supply pressure ･...

  • Page 22: Outer Dimensions

    2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure 2.3.3 Outer Dimensions Figure 2-1 Outer Dimensions 4032**C Compound 2-stage Screw Compressor 4032**C 2.3 Compressor Specifications...
  • Page 23 2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure Table 2-4 4032**C Outer Diameter of Low-stage M Rotor and Shaft Key Size Symbol in Size Location （Length unit：mm） Figure 2-1 Φ 110 ±0.01 Shaft-D Outer diameter of low-stage M rotor shaft Key-W Shaft key width of low-stage M rotor shaft -0.062 Shaft +Key...
  • Page 24 2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure Table 2-6 4032**C Outer Dimensions Unit： mm Symbol Compressor Model Figure 1792.5 1792.5 1792.5 1684.5 1684.5 1684.5 1569.5 1569.5 1569.5 1336.5 1336.5 1336.5 1228.5 1228.5 1228.5 1113.5 1113.5 1113.5 1229 1229 1229 1121 1121 1121 1006...
  • Page 25 2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure Symbol Compressor Model Figure 1055 1055 1055 1055 1055 1055 1055 1055 1055 1030 1030 1030 1030 1030 1030 1030 1030 1030 1050 1050 1050 1050 1050 1050 1050 1050 1050 1120 1120 1120 1120 1120...

  • Page 26: Compressor Structure

    2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure Compressor Structure  For names of each part of the compressor, refer to Section 7.1 "Exploded Views, Sectional Views ", and Section 7.2 "Parts Configuration Table". Figure 2-2 4032**C Screw Compressor Sectional View The 4032**C model, a compound 2-stage compressor, consists of two compressors, (i) a low-stage compressor which suctions gas, working fluid, from the refrigerating unit and compresses (pressure-raises) the gas and (ii) a high-stage compressor which furthermore compresses the gas that has been...

  • Page 27: Mechanisms

    2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure Mechanisms 2.5.1 Basics of the Screw Compressor The screw compressor is categorized as a positive displacement rotary compressor. As shown in Figure 2-3, the refrigerant (gas) is continuously compressed by the 3-dimensional spaces that are formed by a pair of male and female screw rotors (with different sectional profiles) and the casing, as the spaces change continuously.

  • Page 28: Compression Process

    2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure 2.5.3 Compression Process As the rotors rotate further, the volume between the rotor lobes decreases while the sealing line moves toward the discharge side, which compresses the trapped refrigerant gas. Figure 2-5 Compression Process Figure 2-6 Discharge Process 2.5.4 Discharge Process...
  • Page 29 2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure (A) Properly adapted Vi to load condition (B) Improperly adapted Vi to load condition Figure 2-8 Relationship between Volume ratio (Vi) and Operation Conditions Compound 2-stage Screw Compressor 4032**C 2.5 Mechanisms 2-11...

  • Page 30: Capacity Control Mechanism

    2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure 2.5.6 Capacity Control Mechanism The capacity control mechanism, by moving a slide valve, lets suction gas (immediately before compressed) bypass and advance to the suction side, to help shorten the rotor portion used for compression.

  • Page 31: Gas And Oil Flow

    2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure Gas and Oil Flow The compression process of the screw compressor is as described in the preceding paragraphs. Gas of the compound 2-stage screw compressor 4032**C is sent from the evaporator, and passes through the suction strainer and check valve.
  • Page 32 2201Q4JE-MY-C9-N_2018.01. Chapter 2 Compressor Specifications and Structure  Oil Supply Route As shown in Figure 2-12, oil supply route for the low-stage is split into six flows including the flow to the shaft seal block lubrication. After completing each role, the oil flows to the high-stage via the low-stage rotor messing part.

  • Page 33: Chapter 3 Installation

    2201Q4JE-MY-C9-N_2018.01. Chapter 3 Installation Chapter 3 Installation General Precautions for Installation  This chapter (Installation) assumes that the compressor is installed to a standard refrigeration/ cold storage/gas compression package unit. If the package unit you are actually using is not the standard type refrigeration/cold storage/gas compression package unit, prepare a proper installation manual by referring to the description in this chapter and paying due consideration to safety, before installing the compressor.
  • Page 34 2201Q4JE-MY-C9-N_2018.01. Chapter 3 Installation Always check the wire ropes before using them. Thoroughly check the wire ropes for problems such as kinks, knots and broken strands. Do not perform lifting before confirming the safety of the wire ropes. If you cannot make a correct evaluation or judgment, entrust an expert to check. To lift the compressor, attach the wire ropes to the appended eye bolts by using appropriate shackles and hooks.
  • Page 35 2201Q4JE-MY-C9-N_2018.01. Chapter 3 Installation  Outer Dimensions, Mass and Lifting Position Figure 3-1 Outer Dimensions, Mass and Lifting Position of Compressor Compound 2-stage Screw Compressor 4032**C 3.2 Installation Works...

  • Page 36: Preparation For Installation

    2201Q4JE-MY-C9-N_2018.01. Chapter 3 Installation 3.2.4 Preparation for Installation  Installation Space Secure sufficient working space for easy operation, cleaning, maintenance, and inspection.  Illumination Prepare illumination devices which allow easy operation, cleaning, maintenance, and inspection.  Ventilation If natural ventilation is insufficient, install ventilation fans according to the relevant regulations. ...

  • Page 37: Installation

    2201Q4JE-MY-C9-N_2018.01. Chapter 3 Installation 3.2.5 Installation 3.2.5.1 Installation Check that the surface of the package unit, where the compressor is to be installed, is even and horizontal. If it is uneven and non-horizontal, tightening the bolts may lead to compressor deformation, which may prevent normal operation.

  • Page 38: Piping Connection

    2201Q4JE-MY-C9-N_2018.01. Chapter 3 Installation 3.2.5.3 Piping Connection  Refrigerant Piping Observe the following when connecting the refrigerant piping to the compressor.  The compressor is one of the few devices installed within the package unit that have moving components. These moving components are adversely affected by foreign substances within the system (scale, dust, spatter, etc.).

  • Page 39: Airtightness Test

    2201Q4JE-MY-C9-N_2018.01. Chapter 3 Installation  Compressor Protective Devices (Safety Devices) To protect the compressor, install the necessary protective devices as described in Section 1.4.3 "Compressor Protective Devices" in this manual Chapter 1. 3.2.6 Airtightness Test Perform an airtightness test on the package unit before starting commissioning. To prevent water entry in the package unit, use nitrogen gas or dry air for the airtightness test.

  • Page 40: Chapter 4 Compressor And Package Unit Operation

    2201Q4JE-MY-C9-N_2018.01. Chapter 4 Compressor and Package Unit Operation Chapter 4 Compressor and Package Unit Operation Lubricating Oil (Refrigerant Oil) Lubricating oil (Refrigerant oil) management is very significant to keep the compressor in a good operating condition. Take the following notes when managing lubricating oil. 4.1.1 Precautions for Selecting the Lubricating Oil ...

  • Page 41: Precautions For Handling Lubricating Oil

    2201Q4JE-MY-C9-N_2018.01. Chapter 4 Compressor and Package Unit Operation  Lubricating oil contains various additives to fulfill necessary lubricating conditions. Types of additives and their mixing ratio depend on each oil brand. We, therefore, recommend to avoid mixed use of different brands of lubricating oil. If mixed brands of lubricating oil are used, the different additives in the lubricating oil may react with each other and produce foreign substances like slurry.

  • Page 42: Lubricating Oil Management Criteria

    2201Q4JE-MY-C9-N_2018.01. Chapter 4 Compressor and Package Unit Operation 4.1.4 Lubricating Oil Management Criteria Lubricating oils that are managed by the criteria are classified into the following categories: (1) Synthetic oils: Polyalkylene glycols (PAG) (2) Mineral oils: Naphthenic base oils and paraffinic base oils (3) Synthetic oils: Alkylbenzene (AB) and Polyalphaolefine (PAO) (4) Synthetic oils: Polyolesters (POE) ...

  • Page 43: Lubricating Oil Replacement Timing

    2201Q4JE-MY-C9-N_2018.01. Chapter 4 Compressor and Package Unit Operation 4.1.5 Lubricating Oil Replacement Timing 4.1.5.1 After Starting the Initial Operation As the oil can easily be contaminated and degraded relatively quickly during the initial operation due to scales and deposits remaining in piping and vessels, be sure to sample and analyze the oil after 500 hours of operation.

  • Page 44: Precautions For Operation

    2201Q4JE-MY-C9-N_2018.01. Chapter 4 Compressor and Package Unit Operation Precautions for Operation If the package unit is used in the refrigeration cycle, please keep in mind the contents of this section in particular. 4.2.1 Prevention of Liquid Flow-back Operation Liquid flow-back is a phenomenon where refrigerant that did not completely evaporate with the gas reaches the compressor.

  • Page 45: When Stopping The Compressor For A Long Time

    2201Q4JE-MY-C9-N_2018.01. Chapter 4 Compressor and Package Unit Operation When Stopping the Compressor for a Long Time Before stopping the compressor for a long time, make sure to perform the following steps.  Turn off the motor main power.  Turn off the oil heater power and the control power. ...

  • Page 46: Chapter 5 Maintenance And Inspection

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Chapter 5 Maintenance and Inspection Precautions for Maintenance and Inspection When reading this Section, also refer to Section 1.1 in this manual Chapter 1.  When entering the machine room for maintenance services, ensure that sufficient ventilation has been started and measure the oxygen concentration so that there is no risk of oxygen deficiency.
  • Page 47 2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection  When checking the operation data of units and executing other daily maintenance services, pay particular attention to avoid touching the area heated to a high temperature causing skin burns or inadvertently moving the handle of a valve leading to an erroneous operation.

  • Page 48: Maintenance And Inspection List

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Maintenance and Inspection List 5.2.1 Daily Management For the purpose of daily maintenance, check the items listed in Table 5-1 "Daily Inspection Item" and record the results. Regularly recording the daily operational data in an operation log makes it possible to detect any significant change in the system.
  • Page 49 2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Table 5-1 Daily Inspection Item (continued) Inspection item Inspection details Checkpoints and actions  Compressor/motor failure Motor current Whether it is increased from the time of the commissioning  Oil loss Oil level of the oil Oil level height ...

  • Page 50: Periodic Inspection

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.2.2 Periodic Inspection Conduct inspection for the following items according to the specified schedule. In addition, observe relevant laws and regulations on the inspections and recording of the results that are provided for other related items such as any safety devices (e.g. gas leak detectors), or other utility (gas/electricity) protection devices that constitute the package unit together with the compressor.

  • Page 51: Guidelines For The Timing Of Compressor Overhaul

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.2.3 Guidelines for the Timing of Compressor Overhaul While the overhaul interval for the compressor depends heavily on the conditions of use, type and condition of the refrigerant and oil, the package unit, and other factors, the table below shows the recommended interval of overhaul, as a guideline.

  • Page 52: Compressor Disassembly Preparation

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Compressor Disassembly Preparation Although screw compressors are very reliable machines, it is still necessary to perform overhaul to inspect internal parts after a certain period of operation. This chapter 5 explains the essential points of disassembly methods, where to inspect on parts, and reassembly procedure of the compound 2-satge screw compressor 4032**C.
  • Page 53 2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Q’ty. Part Name Code No. Remarks O-ring JIS B 2401 G95 PA12-095 12-1 Gasket, Bearing Head (1) CS01200-400 12-2 Gasket, Bearing Head (2) CS01200-320N 17-1 Gasket, Bearing Cover (1) CS01700-400 17-2 Gasket, Bearing Cover (2) CS01700-4032CN Gasket, Balance Piston Cover CS02300-320N...
  • Page 54 2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Q’ty. Part Name Code No. Remarks 93-2 Gasket, Suction Flange (2) PL300-300 ANSI #300 12" 96-1 Gasket, Discharge Flange (1) PL300-300 ANSI #300 12" 96-2 Gasket, Discharge Flange (2) PL300-200 ANSI #300 8" Mechanical Seal Assembly 400*** BBD-E CS1002-400EBD Micro Switch CS12500-200...

  • Page 55: Refrigerant Gas Recovery

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.3.3 Refrigerant Gas Recovery At the time the compressor operation is stopped, the pressure inside the compressor is still high. As such, it is necessary to drop the pressure down to the atmospheric pressure before starting the disassembly process.

  • Page 56: Removal Of Connections To The Package Unit

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.3.4 Removal of Connections to the Package Unit  If high-pressure refrigerant gas or refrigerant-mixed lubricating oil remains inside the compressor, a gas and oil under pressure will gush out as soon as a sealed part is opened and cause injury to the operator such as frostbite or loss of eyesight.

  • Page 57: Removal And Lifting The Compressor

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.3.5 Removal and Lifting the Compressor  The work to lift up or move the compressor must be performed by a qualified operator.  Make sure that the lifting equipment and wires have sufficient load capacity for the compressor.

  • Page 58: Disassembly And Inspection

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Disassembly and Inspection During the overhaul work, be very careful in handling the parts. As the compressor is a delicate machine that is operated at very high speed, a minor handling error could result in a situation where the rotor and other major components must be entirely replaced.

  • Page 59: Unloader Indicator

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.1 Unloader Indicator On the 4032**C model, unloader indicators are installed on both the high and low-stages. The high-stage unloader has the same indicator as that for the UD-series single-stage compressors (standard model), while the dial and the micro-switch cam are designed for indicated load of 30 to 100 %.

  • Page 60: Disassembly

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Figure 5-4 Standard type Unloader Indicator 5.4.1.1 Disassembly ■ In Case of Removing the Wiring only When removing the wiring of the unloader indicator upon removing the compressor, it is necessary to remove the cover as the indicator has a terminal block for the wiring. Perform the work according to the following procedure, and after removing the wires, attach the cover to them for protection.

  • Page 61: Unloader Cover

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.2 Unloader Cover The unloader cover [74-1] [74-2] is mounted with the indicator cam [77-1] [77-2], which converts the linear motion of the unloader slide valve to a rotational motion, and their mounting parts. The indicator cam is supported by the ball bearing [78-1] [78-2] and fixed to the cover with a bearing gland [80-1] [80-2].

  • Page 62: Inspection

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Low-stage Unloader Cover High-stage Unloader Cover c) If the indicator cam will not move normally, check the spiral groove of the indicator cam, ball bearing , and guide pin. The disassembly sequence is as follows: c-1) As the bearing gland [80-1] [80-2], which fixes the indicator cam in place, is secured by three hexagon socket head cap screws [81-1] [81-2] on the cylinder side of the unloader cover, unscrew and remove these bolts.

  • Page 63: Unloader Piston And Unloader Cylinder

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.3 Unloader Piston and Unloader Cylinder Inside the unloader cylinder [60-1] [60-2] is an unloader piston [64-1] [64-2] around which the cap seal [66-1] [66-2] and O-ring [65-1] [65-2] are fitted. The unloader piston is assembled to the unloader push rod [67-1] [67-2], which operates the unloader slide valve, with the lock nut [69-1] [69-2].

  • Page 64: Inspection

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection e) The low-stage unloader cylinder [60-1] is fastened by twelve hexagon socket head cap screws [594] to the low-stage bearing cover [16]. Even when all the hexagon socket head cap screws are removed, the unloader cylinder will not drop off as it is securely engaged with the bearing cover.

  • Page 65: Shaft Seal Block

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.4 Shaft Seal Block 4032**C models use the double balanced mechanical seal assembly as the shaft seal. According to the system applications and working fluids ( refrigerants), 4032**C applies an appropriate one from appropriate three types of mechanical seal assemblies, i.e., BOD (balanced, O-ring, double) type, BBD (balanced, bellows, double) type, and BBDE (balanced, bellows, double, E* made) type.

  • Page 66: Bearing Cover

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.5 Bearing Cover The bearing cover [16] must be removed when the low-stage bearing block is inspected or the rotor is pulled out for inspection. 5.4.5.1 Disassembly a) Before starting the work, protect the rotor axis with curing tapes and/or other protective covering not to damage them.

  • Page 67: Separating High-Stage And Low-Stage Blocks

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.6 Separating High-stage and Low-stage Blocks The high-stage and low-stage blocks must be separated before inspecting the gear coupling, high-stage thrust bearing, main bearing, pulled out rotor, etc. As explained at the beginning of Section 5.5 of this chapter, the separation may be done at the initial stage of the overhaul work.

  • Page 68: Balance Piston

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.8 Balance Piston During the operation of a screw compressor, both the rotation rate and the thrust load of the M rotor are higher than those of the F rotor. Accordingly, the service life of the thrust bearing for the M rotor will be significantly shorter than that of the F rotor, if no special measures are taken.

  • Page 69: Low-Stage Suction Cover And Side Bearings

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.9 Low-stage Suction Cover and Side Bearings If the work sequence is such that the thrust bearing block is disassembled first and then the suction cover is removed, there is a risk that, when the suction cover is separated from the main rotor casing, the rotor may also be pull out and dropped.

  • Page 70: Inspection

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection The side bearing [28-1] has been press fit from the balance piston cover side of the suction cover. Remove the snap ring [29-1] holding the side bearing using internal snap ring pliers. Either push out the side bearing from the main rotor casing side using some block or pull it out using a special tool.

  • Page 71: High-Stage Suction Cover And Side Bearings

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.410 High-stage Suction Cover and Side Bearings Similarly to the case of the low-stage side, the lock nut fastening the thrust bearing must be loosened before removing the suction cover. 5.4.10.1 Disassembly Remove the hexagon head bolts [45-2] and the conical spring washers [46-2] that are used to fasten the thrust bearing gland [43-2].

  • Page 72: Thrust Bearing Block

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.11 Thrust Bearing Block 5.4.11.1 Disassembly of the High-stage Thrust Bearing Block For the high-stage thrust bearing, one of two types of bearings, i.e. the ball bearing and the tilting pad thrust bearing, is used according to the working fluid, requirements of the use of the package unit and the applicable standard.

  • Page 73: Disassembly Of The Low-Stage Thrust Bearing Block

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.11.2 Disassembly of the Low-stage Thrust Bearing Block Remove the lock nut [39-1] that has been loosened. Then, remove the torsional slip washer [237-1], lock washer [40-1], and thrust washer [250-1]. Remove the key [346] for TPTB (Tilting Pad Thrust Bearing) on the rotor shaft.
  • Page 74 2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Low-stage TPTB (Tilting Pad Thrust Bearing) a) Disassemble the TPTB and visually inspect the surfaces of the tilting pad and the thrust collar. If any flaw and/or abrasion is found in each tilting pad piece, it is necessary to replace the TPTB assembly with a new one.

  • Page 75: Rotors And Main Rotor Casing (Low-Stage/High-Stage)

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.12 Rotors and Main rotor casing (Low-stage/High-stage) 5.4.12.1 Disassembly While you can pull out the rotor either from the M or F side, you should be very careful in the work as both of rotors are very heavy. In particular, be careful not to flaw the Low-stage M rotor shaft because the shaft area is installed the mechanical seal assembly.

  • Page 76: High-Stage Bearing Head And Main Bearings

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.13 High-stage Bearing Head and Main Bearings On the rotor mounting side of the bearing head [11-2], there is a gas discharge port as determined by the operating conditions of the compressor. This discharge port affects the performance of the compressor.

  • Page 77: Low-Stage Bearing Head And Main Bearings

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.4.14 Low-stage Bearing Head and Main Bearings 5.4.14.1 Disassembly Unscrew and remove all the hexagon socket head cap screws [2-1]. Drive in the alignment pins [3-1] from the bearing head side to the main rotor casing side. Screw tow jacking bolts into screw holes on the flange portion of the main rotor casing, then screw the bolts evenly to push and separate the bearing head and the main rotor casing.

  • Page 78: Reassembly

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5 Reassembly  During the reassembly work, be very careful in selecting the correct replacement O-rings of the specified standard, not to make a mistake regarding the size, material, for fixed use, for sliding use, etc. Using a wrong O-ring can lead to oil leak or other problems.
  • Page 79 2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Figure 5-16 Illustration of the Assembly Sequence (Example) Compound 2-stage Screw Compressor 4032**C 5.5 Reassembly 5-34...

  • Page 80: Unloader Slide Valve

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.1 Unloader Slide Valve a) Attach two O-rings [89] on the guide block stem [88] and screw in the guide block stem securely from the bottom of the main rotor casing [1]. Then, mount the guide block [87] in the casing. In the case of 4032**C models, the guide block is not used in the low-stage main rotor casing.

  • Page 81: Bearing Head And Main Bearings

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.2 Bearing Head and Main Bearings The main bearing (O-ring type) [27] is installed by a light press fit. The size of O-ring [432-1] attaching on the low-stage main bearing has been changed to JIS B 2401 G200 from G210 according to the design modification in September 2012.

  • Page 82: Bearing Head And Rotor Casing

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.3 Bearing Head and Rotor Casing  Since the bearing head gasket [12] is not symmetrically shaped, carefully check the orientation when installing the gasket.  If you place the bearing head gasket by just hanging it on the stud bolts, the gasket will protrude into the inside of the rotor casing when the casing is assembled.
  • Page 83 2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection g) Attach the O-ring gland [326-1] on the low-stage bearing head where is the part of the unloader push rod protruding. Attach two O-rings [325] and four backup rings [419] alternately on the two O-ring grooves in the O-ring gland inner circumference.

  • Page 84: Installing The Rotors

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.4 Installing the Rotors The rotor must be sufficiently reworked. If any slight flaw is observed on the shaft surface in the area of attaching the bearing and mechanical seal assembly, use a sand paper to correct and finish the surface. After finishing the surface to attach the seal, apply protective tape on the surface.

  • Page 85: Suction Cover And Side Bearings

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.5 Suction Cover and Side Bearings Similarly to the main bearing, the side bearing (O-ring type) [28] is machined to the size that will allow light press fitting to the suction cover [5]. In addition as is the case with the O-ring for the main bearing, the size of the O-ring for the low-stage side bearing has been changed to JIS B 2401 G200 from G210 according to the design modification.

  • Page 86: Installing The Suction Cover

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.6 Installing the Suction Cover Both of the high-stage and low-stage suction cover gaskets [6] are not symmetrically shaped. Also, as shown in Figure 5-19, there are three type gaskets in the same sizing. Be careful not to use a wrong gasket.

  • Page 87: Balance Piston And Balance Piston Sleeve

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.7 Balance Piston and Balance Piston Sleeve Install the balance piston sleeve to the high-stage suction cover, and install the balance piston on the M rotor shaft end portion of the high-stage suction cover side. The installation of the balance piston sleeve may be done either before the suction cover installation to the main rotor casing.

  • Page 88: Thrust Bearing Block

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.8 Thrust Bearing Block [Low-stage] [High-stage] Figure 5-20 Thrust Bearing Block Table 5-10 Components of the thrust bearing block Q'ty Part Name Low-stage High-stage Low-stage High-stage 42-1 42-2 Thrust bearing alignment spacer (1), (2) 38-1A 38-2 Thrust bearing (1), M rotor, (2)

  • Page 89: High-Stage Block

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.8.1 High-stage Block As described in Section 5.4.11, for the high-stage thrust bearings, two types of bearings, i.e. the ball bearing and the tilting pad thrust bearing, is used according to the working fluid, requirements of the use of the package unit and the applicable standard.

  • Page 90: Low-Stage Block

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.8.2 Low-stage Block The TPTB (Tilting Pad Thrust Bearing) is used as the low-stage thrust bearing. The TPTB for M rotor and the TPTB for F rotor are the same in outer diameter and inner diameter, but are different in lengths.

  • Page 91: End Clearance Measurement

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.8.3 End Clearance Measurement At this point (i.e., after the thrust bearing block has been fully assembled), measure the clearance between the bearing head end face and the rotor end face on the discharge side. This clearance is called as the end clearance.

  • Page 92: End Clearance Adjustment Procedure

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection d) Then, read the dial gauge indication. This value shows the actual end clearance. If the end clearance is outside the specified value, perform the adjustment work described in the next section. If the end clearance is within the specified value, turn the M rotor shaft by hand and confirm the smooth turning without uneven tightening.

  • Page 93: Balance Piston Cover And High-Stage Unloader Cylinder

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.9 Balance Piston Cover and High-stage Unloader Cylinder a) Install the unload spacer [420] attached two O-rings [421] in the inner circumference grooves on the high-stage unloader push rod [67-2]. This unload spacer is used as high-stage load capacity adjustment (minimum 30 % load) to prevent overload of the driving machine at the time of compressor start-up.

  • Page 94: Bearing Cover

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.10 Bearing Cover Before installing the bearing cover [16], check that the teeth of the lock washers of the thrust bearing part have been properly bent to prevent rotation and that the hexagon head bolts fastening the thrust bearing gland are with spring washers.

  • Page 95: Low-Stage Unloader Cylinder

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.12 Low-stage Unloader Cylinder The installation of the low-stage unloader cylinder may be done either after the bearing cover installation described in Section 5.5.10 or after the assembly of the shaft seal block. Check that the O-ring [73-1] is inserted in the O-ring groove on the tip of the unloader push rod [67-1], at the position where the unloader piston is installed.

  • Page 96: Unloader Cover

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.13 Unloader Cover [Low-stage] [High-stage] Figure 5-23 Unloader Cover Block Use eye bolts to move the unloader piston back and forth to check the normal operation again. Assemble the ball bearing [78] on the shaft portion of the indicator cam [77]. When fitting the bearing onto the shaft, push the inner race of the bearing.

  • Page 97: Coupling The High-Stage And Low-Stage Blocks

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.14 Coupling the High-stage and Low-stage Blocks Both high-stage and low-stage, install the drive hub [152] and shaft key [157] on the M rotor axis. Attach the external snap ring [187] to retain the drive hub. Figure 5-24 Gear Coupling Block Fasten the M10 hexagon socket set screw [159] to retain the shaft key [157].

  • Page 98: Unloader Indicator

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.15 Unloader Indicator The unloader indicator is implemented with two micro-switches, a micro-switch cam, and a potentiometer. These parts are used to detect the change in the rotation angle of the indicator cam shaft, which converts the axial position change of the unloader slide valve into rotational position change, convert the change into an electric signal, and send the signal to the package unit and/or the controller of the refrigeration system.

  • Page 99: Micro-Switches And Micro-Switch Cam

    2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection 5.5.15.2 Micro-switches and Micro-switch Cam The unloader indicator uses two micro-switches [125] and one micro-switch cam [127] to detect the commanded 0% (30% for the high-stage) and 100% capacity control positions of the unloader slide valve.
  • Page 100 2201Q4JE-MY-C9-N_2018.01. Chapter 5 Maintenance and Inspection Figure 5-25 Unloader Indicator Assembly Table 5-12 Component Parts of the Unloader Indicator Assembly Part Name Q'ty Part Name Q'ty Micro-switch base plate Hexagon socket set screw, M3 × 14 Hexagon socket head cap screw, M6 Dial, 30 to 100 % ×...

  • Page 101: Chapter 6 Troubleshooting

    2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting Chapter 6 Troubleshooting Table 6-1 describes typical trouble symptoms of compressors, their causes and actions to be taken. The explanations of this Chapter are assumed that the compressor is used in the general refrigeration cycle. Table 6-1 Troubleshooting 01: Compressor does not start up Direct cause Root cause...

  • Page 102: 03: Unusually Low Pressure (Decrease Of Suction Pressure)

    2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting 02: Compressor stops immediately after startup (continued) Direct cause Root cause Action Low pressure protection Insufficient refrigerant flow To correct insufficient liquid supply,  Insufficient liquid supply circuit activates. inspect expansion valve and liquid supply strainer. Take necessary actions.

  • Page 103: 05: Intermediate Pressure Is Unusually High

    2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting 04: Low oil pressure (continued) Direct cause Root cause Action Insufficient oil in oil Extensive oil leak Inspect machine room and around the separator. compressor, and take necessary actions. Check if there is oil floating in cooling water system.

  • Page 104: 06: Unusually High Pressure (Abnormal Discharge Pressure)

    2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting 06: Unusually high pressure (abnormal discharge pressure) Direct cause Root cause Action Heat exchange failure in Heat transmission tubes and/or Clean and wash. condenser (heat fins are contaminated or Depending on the contamination exchanger) blocked. level, use chemical cleaning. Water loss of water pump or Identify defective devices, investigate Failure in fan motor, thermo...

  • Page 105: 07: Discharge Temperature Is Abnormally High

    2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting 06: Unusually high pressure (continued) Direct cause Root cause Action Discharge pressure Failure of high pressure Identify defective devices, investigate detection function is protection device, pressure causes of failure and take necessary defective. sensor, relay, etc. actions.

  • Page 106: 08: Leak From Mechanical Seal

    2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting 08: Leak from mechanical seal Direct cause Root cause Action Initial leak after In some cases, immediately In case of initial leak, although leak replacement until sliding after replacement, the amount might increase temporarily, it surfaces settle compressor-specific operating will decrease gradually.

  • Page 107: 09: Squeaking Of Mechanical Seal

    2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting 08: Leak from mechanical seal (continued) Direct cause Root cause Action Poor contact of sliding Foreign matter attached to Replace the whole quantity of surfaces sliding surfaces, due to lubricating oil. contaminated lubricating oil. Install bypass filter to oil supply line. Faulty assembly of parts Disassemble, replace parts and Human error...

  • Page 108: 11: Capacity Control Malfunction

    2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting 10: Capacity control position is indicated incorrectly (continued) Direct cause Root cause Action Inaccurate reading of E/E positioner and/or indicator If deteriorated over time, replace. capacity control indicator is faulty. If there are specific causes such as on the control panel.

  • Page 109: 12: Compressor Generates Abnormal Vibration And/Or Sound

    2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting 12: Compressor generates abnormal vibration and/or sound. Direct cause Root cause Action Shaft poorly aligned with If the shaft vibration value of Conduct shaft alignment again. motor axial direction is high, it may be If this occurs frequently in monocoque caused by this.
  • Page 110 2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting 12: Compressor generates abnormal vibration and/or sound (continued) Direct cause Root cause Action Liquid flow-back during Aperture of liquid In case of temperature-type expansion valve, operation supply expansion check the condition of temperature sensitive * Notable frosting on the valve is large cylinder and capillary tube.
  • Page 111 2201Q4JE-MY-C9-N_2018.01. Chapter 6 Troubleshooting 12: Compressor generates abnormal vibration and/or sound (continued) Direct cause Root cause Action Foreign substances Welding spatter, etc. Check suction strainer and/or oil filters. Replace entering the flowing from upstream element if defective. compressor side Overhaul the compressor. Collect foreign substances and identify their Tools and/or waste sources.

  • Page 112: Chapter 7 Related Documents

    2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Chapter 7 Related Documents Exploded Views, Assembly Sectional Views Figure 7-1 4032**C Exploded View (Low-stage) Compound 2-stage Screw Compressor 4032**C Exploded Views...
  • Page 113 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Figure 7-2 4032**C Exploded View (High-stage) Compound 2-stage Screw Compressor 4032**C Exploded Views...
  • Page 114 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Compound 2-stage Screw Compressor 4032**C Assembly Sectional Views...
  • Page 115 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Compound 2-stage Screw Compressor 4032**C Assembly Sectional Views...
  • Page 116 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Compound 2-stage Screw Compressor 4032**C Assembly Sectional Views...

  • Page 117: Parts Configuration Table

    2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Parts Configuration Table Table 7-1 Parts Configuration Table Part Name Code No. Remarks Q’ty. Main Rotor Casing (1) CS00100-400S 400S** 1(S*C) Main Rotor Casing (1) 400M** 1(M*C) Main Rotor Casing (1) 400L** 1(L*C) Main Rotor Casing (1) 400LL* 1 (LL*C) Main Rotor Casing (1)
  • Page 118 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Part Name Code No. Remarks Q’ty. M30×100 Hexagon Socket Head Cap Screw NB35930-100 18-1 with captive washer Hexagon Socket Head Cap Screw 18-2 NB35424-075 M24×75 Hexagon Socket Head Cap Screw 18-3 NB35424-095 M24×95 Φ20×100 Alignment Pin with Groove and Hole NE2320-100A 19-1 Φ25×70...
  • Page 119 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Part Name Code No. Remarks Q’ty. Thrust Bearing (2) TPTB CS03800-T00320 320*** 38-2 Lock Nut (1) 39-1 NG311-028 AN28 Lock Nut (2) 39-2 NG311-021 AN21 Lock Washer (1) NG32-028X AW28X 40-1 Lock Washer (2) NG32-021 AW21 40-2 Spacer, Thrust Bearing Alignment (1)
  • Page 120 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Part Name Code No. Remarks Q’ty. Unloader Cylinder (2) CS06000-320L 320L** 1(*LC) 60-2 Unloader Cylinder (2) 60-2 CS06000-320LL 320LL* 1(*LLC) Hexagon Socket Head Cap Screw NB35420-050 M20×50 Hexagon Socket Head Cap Screw NB35420-110 M20×110 O-ring PA12-250 JIS B 2401 G250 63-1...
  • Page 121 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Part Name Code No. Remarks Q’ty. Hexagon Socket Head Cap Screw NB35406-015 M6×15 81-1 Hexagon Socket Head Cap Screw 81-2 NB35406-015 M6×15 V-ring 82-1 CS08200-200B VH10 NBR V-ring CS08200-200B VH10 NBR 82-2 Spring CS08300-200 200*** 83-1 Spring 83-2...
  • Page 122 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Part Name Code No. Remarks Q’ty. Hexagon Socket Head Cap Screw 166-1 NB35412-025 M12×25 Hexagon Socket Head Cap Screw NB35405-010 M5×12 166-2 Snap Ring C type External 187-1 NG12-095 JIS B 2804 S95 Snap Ring C type External 187-2 NG12-095 JIS B 2804 S95...
  • Page 123 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Part Name Code No. Remarks Q’ty. O-ring PA11-070 JIS B 2401 P70 Gland, O-ring (1) CS32600-400 400V** 326-1 Gland, O-ring (2) 326-2 CS32600-320 320*** O-ring PA11-058 JIS B 2401 P58 Shaft Key for TPTB CS34600-400 400*** Backup Ring PBP21-070...

  • Page 124: Tightening Torques For Bolts And Nuts

    2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Tightening Torques for Bolts and Nuts Table 7-2 List of Tightening Torques  Hexagon socket head cap screw Torque What is tightened Q’ty. Size N·m kgf·cm Main Rotor Casing (1) to 1600 16000 M30×110 Suction Cover (1) and Bearing Head (1) Main Rotor Casing (2) to 7500 M24×80...
  • Page 125 2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents  Lock Nut Tightening torque (N·m) Q’ty. Size What is tightened Standard Maximum 39-1 Thrust Bearing (1) Note 1 5347 6683 AN28 39-2 Thrust Bearing (2) Note 1 2259 2824 AN21 69-1 Unloader Piston (1) AN10 69-2 Unloader Piston (2)

  • Page 126: About The O-Rings Used

    2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents About the O-rings Used 7.4.1 List of O-rings Used Table 7-4 List of O-rings Used Location O-ring JIS B 2401 description in Part No. Size attached place functional aspect O-ring Gland same as left Balance Piston Sleeve same as left G190 63-1...

  • Page 127: Tools For Disassembly

    2201Q4JE-MY-C9-N_2018.01. Chapter 7 Related Documents Tools for Disassembly Table 7-5 List of Tools for Disassembly (example) Parts Center Tool name Illustration size, etc.; Code No. SG261-08 1/4” Ratchet wrench SG231-250 250 mm Adjustable wrench SG112-075 Phillips 75 mm Screwdriver SG111-075 Flat blade 75 mm Screwdriver...
  • Page 128 2201Q4JE-MY-C9-N_2018.01. MAYEKAWA MFG. CO., LTD. 3-14-15 Botan, Koto-ku, Tokyo 135-8482, JAPAN (81)-3-3642-8181 FAX: (81)-3-3643-7094 http://www.mayekawa.com...

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