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Summary of Contents for Eaton Vickers CM2 Series
- Page 1 ® Vickers Overhaul Manual Directional Controls Multiple Unit Valves CM2 and CM3 Series -20 Design CM2 and CM3 Series -30 Design Revised 7/1/86 M-2400-S...
- Page 2 Forward This manual illustrates and describes the recommended pro- cedure for servicing the CM2 and CM3 series valves. Valves of the -30 design will be referred to throughout this manual, but this information is essentially the same for the -20 design valves.
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Page 3: Table Of Contents
Table of Contents Section Page Introduction ..................A. -
Page 4: Introduction
Section I – Introduction A. Purpose Of Manual 2. Model Codes - Variations within each basic model series are covered in the model code. Table 2 shows a This manual has been prepared to assist the users of complete breakdown of the model codes covering these Vickers CM2 and CM3 series -20/-30 Design Multiple Unit units. - Page 5 Model Code Directional Control Inlet Body Type U Section - No Spool CM - Multiple unit valve, mobile R - Standard relief valve (For Series Operation) (Partial flow by-pass) F - Tandem inlet valve Spool Modification Series Designation (Full flow by-pass) 1 - Detent 2 series K - Standard relief valve...
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Page 6: Description
Section II – Description A. General C. Detent Features CM2 and CM3 Series -20/-30 Design Valves are made up of 1. Spool Detents - A spool detent assembly consists directional control valve sections mounted in banks and of a special end cap with a spring loaded plunger and a connected internally to common pressure and tank return spool extension. -
Page 7: Principles Of Operation
Section III – Principles of Operation b. F* Section - The F* section has two pressure A. General connections. One connection is made to the pump source Figure 2 is a schematic illustration of a four section valve, and the second connection is made with a preceding valve showing the cylinder ports and the by-pass pressure and assembly to accept the by-pass flow for tandem operation. - Page 8 For convenience A.S.A. symbols (Y32. 10-1958) are Pressure “B” Spool also shown with the following descriptions of each spool. Tank Return Flow a. “B”- Motor Spool - “B” spools are used when flow is directed to the operation of a hydraulic motor instead Neutral of a cylinder.
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Page 9: Flow Control And Relief Valve
c. “T” Single Acting Spool - “T* spools direct flow Figure 7b shows operation at less than the relief to one end of an operating cylinder only as in the example valve setting. There is no flow over the by-pass orifice, so full of the lift mechanism on a fork-type truck. -
Page 10: Tandem Operation
7. Tandem Operation - Tandem operation permits C. Non-Operating Sections operation of two banks of valves from the same pumping 1. General - The CM2 valve non-operating sections are source. An internal plug in the outlet section of the first the “E”... -
Page 11: Installation
Section IV – Installation and Operating Instructions A. Installation Drawings G. Hydraulic Fluid Recommendations The installation drawings M-259218 and M-259219 should The oil in a hydraulic system serves as the power transmission be consulted for installation dimensions. medium. It is also the system’s lubricant and coolant. Selection of the proper oil is a requirement for satisfactory system perfor- B. - Page 12 Arctic Conditions: 3. Additives - Research has developed a number of additive agents which materially improve various characteris- Arctic conditions represent a specialized field where exten- tics of oil for hydraulic systems. These additives are selected sive use is made of heating equipment before starting. If to reduce wear, increase chemical stability, inhibit corrosion necessary, this, and judicious use of SAE 5W or SAE 5W-20 and depress the pour point.
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Page 13: Inspection And Maintenance
Section V – Service and Maintenance A. Service Tools C. Adding Fluid to the System No special tools are required to service CM2 or CM3 series When hydraulic fluid is added to the system, it should be multiple unit valves. pumped through a 25 micron filter. -
Page 14: Troubleshooting
remembered that pressure and delivery are factors which F. Troubleshooting are usually dependent upon each other. Adequate pressure Table 4 lists the difficulties which may be experienced with gage equipment and a thorough understanding of the the unit and hydraulic system. It indicates the cause and operation of the complete hydraulic system are essential to remedy for each of the troubles listed. -
Page 15: Overhaul
Section VI – Overhaul A. General 4. Check the relief valve for smooth movement in its bore. The valve should move from its own weight. During disassembly, particular attention should be given to identification of parts for reassembly. Spools are selectively D. -
Page 16: Valve Options
Section VII – Valve Options A. General passage back to the pressure port. The anti-cavitation check valve is located in valve operating sections next to the cylin- der ports and function when the spool is in neutral and oper- Operating sections can be supplied with anti-cavitation ating position. - Page 17 Nut (4 req’d) CM-2 Valve Torque to 45-50 lb. ft. CM-3 Valve Torque to 55-60 lb. ft. Body and spool not Stud (4 Req’d) availabel separately. Order valve seciton Plug by model number. Screw O-Ring (2 Req’d) Spring Screw Control Valve Sub-Assy.
- Page 18 Plug Plug (2 req’d) Spring Spring Piston (2 req’d) Piston Snap Ring (2 req’d) Screw Washer Screw (2 req’d) Detent Screw (2 req’d) Detent Detent used on “C” Float Section Detent used on “I” Section Plug Plug O-Ring Plug “F” Inlet Section “U”...
- Page 19 15151 Highway 5 46 New Lane, Havant Eden Prairie, MN 55344 Hampshire PO9 2NB Telephone: 612 937-7254 England Fax: 612 937-7130 Telephone: (44) 170-548-6451 www.eatonhydraulics.com Fax: (44) 170-548-7110 Form No. 00-000 Copyright Eaton Corporation, 0000 All rights reserved. Printed in U.S.A...
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