Case 750L Repair Manual
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Case 750L Repair Manual

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REPAIR MANUAL
750L
850L
87728445 1 2/28/2008

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How to check torque converter fluid and what type of fluid is it (750 case construction dozer)

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Summary of Contents for Case 750L

  • Page 1 REPAIR MANUAL 750L 850L 87728445 1 2/28/2008...
  • Page 2 WHEELS AND TRACKS Tracks D.50.B BODY AND STRUCTURE USER CONTROLS AND SEAT E.32.A USER CONTROLS AND SEAT Operator seat E.32.C USER PLATFORM E.34.A ENVIRONMENT CONTROL Heating system E.40.B ENVIRONMENT CONTROL Air-conditioning system E.40.C 87728445 1 2/28/2008 Find manuals at http://best-manuals.com/search?&s=CASE-87728445...
  • Page 3 SAFETY SECURITY ACCESSORIES Safety E.50.B TOOL POSITIONING LIFTING G.10.A TILTING G.20.A SWINGING G.40.A WORKING ARM H.50.B SINGLE ARM TOOL ATTACHMENT Lift TOOLS AND COUPLERS DIGGING Non-articulated digging tools J.20.B LANDSCAPING Dozer blade J.40.F 87728445 1 2/28/2008 Find manuals at http://best-manuals.com/search?&s=CASE-87728445...
  • Page 4 87728445 1 2/28/2008 Find manuals at http://best-manuals.com/search?&s=CASE-87728445...
  • Page 5 INTRODUCTION 87728445 1 2/28/2008 Find manuals at http://best-manuals.com/search?&s=CASE-87728445...
  • Page 6 Contents INTRODUCTION Basic instructions General specification Conversion factors Hydraulic contamination 87728445 1 2/28/2008 Find manuals at http://best-manuals.com/search?&s=CASE-87728445...
  • Page 7 (C) Functional Data (how it works) for all the mechanical, electrical or hydraulic devices, components and as­ semblies. (G) Diagnostic Data (fault codes, electrical and hydraulic troubleshooting) for all the mechanical, electrical or hydraulic devices, components and assemblies. 87728445 1 2/28/2008 Find manuals at http://best-manuals.com/search?&s=CASE-87728445...
  • Page 8 ENGINE - General specification (B.1 0.A - D.40.A. 10) FUNCTIONAL DATA ENGINE - Dynamic description (B.1 0.A - C.30.A.10) SERVICE ENGINE - Remove (B.10.A - F.10.A.10) DIAGNOSTIC ENGINE - Troubleshooting (B.1 0.A - G.40.A.10) 87728445 1 2/28/2008 Find manuals at http://best-manuals.com/search?&s=CASE-87728445...
  • Page 9 You will find an alphabetical index at the end of each chapter. By referring to (A), (B) and (C) of the coding, you can follow the contents or index (page numbers) and quickly find the information you are looking for. 87728445 1 2/28/2008 Find manuals at http://best-manuals.com/search?&s=CASE-87728445...
  • Page 10 The page footer will contain the following references: Publication number for that Manual, Section or Chapter. Version reference for that publication. Publication date Section, chapter and page reference e.g. A.1 O.A / 9 87728445 1 2/28/2008 Find manuals at http://best-manuals.com/search?&s=CASE-87728445...
  • Page 11 INTRODUCTION General specification BOLT TORQUE INFORMATION DECIMAL HARDWARE Fasteners should be replaced with the same or higher grade. If higher grade fasteners are used, these should only be tightened to the strength of the original. Make sure the fasteners threads are clean and that thread engagement is started. This will prevent them from failing when being tightened.
  • Page 12 INTRODUCTION GRADE2* GRA D E 5, 5.1 or 5.2 GRA D E 8 or 8.2 GRA D E L9 Alloy} Dry** Lubricated D r y - Lubricated Head 1-•s SIZE Nm lb/ft lb/ft lb/ft Nm lb/ft Nm lb/ft Nm lb/ f t Nm lb/ft Nm lb/ft 130 325 240 244...
  • Page 13 INTRODUCTION GRADE 8.8 Bolts Nuts and Studs GRADE 10.9 Bolts. Nuts a n d Studs D rv l b / i n l b/ f t SIZE lb/ft lb/in 1375 to 1545 1010 to 1140 1900 to 2140 1400 to 1580 2400 to 2700 1770 to 1990 3315 to 3730...
  • Page 14 INTRODUCTION 0-Ring Face Seal End Nor n . SAE Tube OD Thread Size Newton lb/in lb/ft Dash Size metres 6.4 mm 1/4 inch 9/16 - 18 23 to 26 204 to 228 9.5 mm 3/8 inch 11/16 - 16 34 to 40 300 to 348 12.7 mm 1/2 inch...
  • Page 15 INTRODUCTION Conversion factors Metric to U.S. MULTIPLY TO OBTAIN AREA: square meter 10.763 91 square foot hectare 2.471 05 acre FORCE: newton 3.596 942 ounce force newton pound force 2.224 809 LENGTH: millimeter 0.039 370 inch foot meter 3.280 840 kilometer 0.621 371 mile...
  • Page 16 INTRODUCTION U.S. to Metric MULTIPLY TO OBTAIN VOLUME: cubic inch 16.387 06 cubic centimeter cubic foot 0.028 317 cubic meter cubic yard 0.764.555 cubic meter ounce (US fluid) 29.573 53 milliliter quart (US liquid) 0.946 353 litre quart (Imperial) 1.136 523 litre gallon (US) 3.785 412...
  • Page 17 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. (A) When you drain the oil or disconnect any line. (B) When you disassemble a component.
  • Page 18 INTRODUCTION 87728445 1 2/28/2008...
  • Page 19 REPAIR MANUAL DISTRIBUTION SYSTEMS 750L 850L 87728445 1 2/28/2008...
  • Page 20 Contents DISTRIBUTION SYSTEMS - A PRIMARY HYDRAULIC POWER SYSTEM A.10.A 750L, 850L SECONDARY HYDRAULIC POWER SYSTEM A.12.A 750L, 850L A.30.A ELECTRICAL POWER SYSTEM 750L, 850L LIGHTING SYSTEM A.40.A 750L, 850L FAULT CODES A.50.A 750L, 850L 87728445 1 2/28/2008...
  • Page 21 DISTRIBUTION SYSTEMS - A PRIMARY HYDRAULIC POWER SYSTEM -10.A 750L 850L 87728445 1 2/28/2008 A. 1 0.A / 1...

  • Page 22: Table Of Contents

    Contents DISTRIBUTION SYSTEMS - A PRIMARY HYDRAULIC POWER SYSTEM -10.A TECHNICAL DATA PRIMARY HYDRAULIC POWER SYSTEM Special tools General specification Capacity Stack valve Torque Special tools Calibration General specification Hydraulic pump Torque General specification FUNCTIONAL DATA Relief valve Exploded view Sectional view Stack valve Exploded view...
  • Page 23 Inlet section - Disassemble Visual inspection Assemble Inlet section - Assemble Install Hydraulic pump Flow test Remove Disassemble without PTO Visual inspection without PTO Assemble without PTO Disassemble with PTO Visual inspection with PTO Assemble with PTO Preliminary test Install Reservoir Apply vacuum DIAGNOSTIC...

  • Page 24: Primary Hydraulic Power System Special Tools

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM PRIMARY HYDRAULIC POWER SYSTEM -Special tools CAS1804 PRESSURE TEST KIT B877558M_ 1 87728445 1 2/28/2008 A.10.A...
  • Page 25 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM CAS1808 FLOWMETER FITTING KIT CAS1808 87728445 1 2/28/2008 A.10.A / 5...
  • Page 26 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM CAS10090 HAND PUMP CAS10090 87728445 1 2/28/2008 A.10.A...

  • Page 27: General Specification

    CAS10280 FLOWMETER CAS10280 PRIMARY HYDRAULIC POWER SYSTEM - General specification Type of oil CASE AKCELA AW68 HYD FLUID Temperature of hydraulic oil when testinQ 52 - 79 °C (125 - 175 °F) Hydraulic pump output 76.8 L at 207 bar at 2000 RPM 20 .3 US gpm at 3000 ps i at 2000 RPM...

  • Page 28: Torque

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Stack valve - Torque Snecial toraues Bolts and nuts that fasten the sections 39 - 47 Nm 28.7 - 34.6 lb ft together Relief valves and load check valves 24 - 30 Nm 17 .7 - 22 lb ft Allen head screws 12 - 15 Nm...

  • Page 29: Torque

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Hydraulic pump - Torque Non PTO pump cover bolts 66 - 80 Nm 49 - 59 lb ft Air vent 9 Nm (80 lb in) Pump housing bolts 271 Nm (200 lb ft) PTO shaft retainer 68 Nm (50 lb ft) Set screw PTO shaft retainer...

  • Page 30: Relief Valve Exploded View

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Relief valve - Exploded view 8S99M034 87728445 1 2/28/2008 A.10.A / 10...

  • Page 31: Sectional View

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Relief valve - Sectional view BS00A057 Pressure ad·ustin screw 87728445 1 2/28/2008 A.10.A / 11...

  • Page 32: Stack Valve Exploded View

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Stack valve - Exploded view BC02J007 Main relief valve Dozer ani:1le section (1 ) Inlet secton Riooer/auxiliary section Dozer lift section Outlet section (4) Dozer tilt section 87728445 1 2/28/2008 A.10.A...

  • Page 33: Filter External View

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Filter - External view � BC04E029 87728445 1 2/28/2008 A.10.A / 13...

  • Page 34: Primary Hydraulic Power System Cleaning

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM PRIMARY HYDRAULIC POWER SYSTEM - Cleaning 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.
  • Page 35 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Visible contamination is foreign material that can be found by sight, touch, or odor. Visible contamination can cause a sudden failure of components. Exam­ ples of visible contamination: (A) Particles of metal or dirt in the oil. (B) Air in the oil.

  • Page 36: Decontaminating

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM PRIMARY HYDRAULIC POWER SYSTEM - Decontaminating CAS10162A CAS10508 CAS10192 Prepare the portable filter CAS10162A by doing the following steps: (A) Remove all the hydraulic oil from the inlet and outlet hoses for the portable filter. (B) Remove the filter element from the portable filter.
  • Page 37 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Continue to run the portable filter. Increase the en­ gine speed to full throttle. Heat the oil to operating temperature by doing the following steps: (A) Hold the blade control lever in the TILT position for five seconds.
  • Page 38 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Completely retract the cylinders of all attachments on the machine. Angle the blade to the right, the right cylinder will be fully retracted and the left will be fully extended. Stop the engine. WARNING If retracting the cylinder rods causes the attachment to be raised, block the attachment in place before pro­...
  • Page 39 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Slowly and completely extend all cylinders. As the piston rod comes in/out of the cylinder, oil will be pushed out of the OPEN end of the cylinders. IMPORTANT: Any attachment or part of an attachment that is raised must be supported with acceptable equipment to prevent the attachment from falling.

  • Page 40: Relief Valve Pressure Test

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Relief valve - Pressure test CAS1804 Raise the right side panel for the equipment control valve. (1) Pressure test port diagnostic coupler. IMPORTANT: Make sure that everyone is clear of the dozer blade prior to proceeding. 8D02F023 Make sure the hydraulic system fluid is at operating temperature, 52 - 79 °C (125 - 175 °F).

  • Page 41: Pressure Setting

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Relief valve - Pressure setting Remove the cover from the main relief valve and loosen the lock nut on the adjusting screw. Turn the adjusting screw into the main relief valve to increase the pressure or out of the main relief valve to decrease the pressure.

  • Page 42: Disassemble

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Relief valve - Disassemble Prior operation: Stack valve Inlet section - Disassem ble (A.1 O.A) Fasten the main relief valve in a vise with soft jaws. Remove the cap. 89051112M Hold the adjusting screw in position while you loosen the lock nut.
  • Page 43 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Remove t h e spri n g . 89051121M Remove the plun ger. 89051124M Remove t he bo dy from th e housi n g . Remove t h e spri n g . 89051130M Replace t h e O-ri ng and t h e backu p ri ng i n t h e hous­...
  • Page 44 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Tap the main relief valve lightly against a solid sur­ face so that the poppet can be removed from the housing. 89051135M Replace the O-ring on the body. 89051204M Replace the O-ring on the adjusting screw. 89051209M Replace the O-ring and the backup ring on the pop­...
  • Page 45 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Rel ief valve - Vis ual inspection (A.10 .A) 87728445 1 2/28/2008 A.10.A / 25...

  • Page 46: Visual Inspection

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Relief valve - Visual inspection Prior operation: Rel ief valve - Disassem ble (A.10 .A) Discard all O-rings, backup rings. Clean all parts in cleaning solvent. Check the parts of the relief valve. Use new parts as necessary.

  • Page 47: Assemble

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Relief valve - Assemble Prior operation : Rel ief valve - Vis ual inspection (A.10 .A) For assembly do the reverse of disassembly, refer to Rel ief valve - Disassem ble (A.1 O .A). Next operation: Stack valve Inlet section - Assem ble (A.10 .A) 87728445 1 2/28/2008...

  • Page 48: Stack Valve Flow Test

    DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Stack valve - Flow test Prior operation: USER PLATFORM - Ti lt (E.34.A) Reservoi r - Apply vac u u m (A.10 .A) Disconnect the hose from the fitting on the inlet port of the equipment control valve.
  • Page 49 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Record the reading of the pressure gauge as Main Relief Valve completely open. If the pressures in Steps 13 and 15 meet specifi­ cations, refer to PRIMARY HYDRAULIC POWER SYSTEM - Genera l specification (A.1 0.A), proceed to step 20.
  • Page 50 DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Hold the blade control lever in the TILT LEFT position and adjust the pressure Load Valve on the Flowmeter as required to keep the pressure at 138 bar (2000 psi). Adjust the engine speed to keep the engine running at 2000 r/min (rpm).
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