Bobcat 873 Skid Steer Loader Service & Repair Manual

~ ~ EQUIPPED WITH B OBCAT INTERLOCK CONTROL SYSTEM (BICS™) .w Service Manual MELROECOMPANY -till ~bobcat" A OUSINESS UNIT OF tUnU' EQUI PME.NT COMPAHY Printed in U.S.A. 6724280 (8-95 ) © Melroe Company 1995

MAINTENANCE SAFETY Instructions are necessary before operating or servicing machine. Read Operation & Maintenance Manual, Handbook and signs (decals) on machine. Follow warnings and instructions in the manuals when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Failure to follow instructions can cause injury or death. W-2003-1089 A Safety Alert Symbol: This symbol is used for important safety messages. When you see this symbol, follow the safety message to avoid personal injury or death. CORRECT CORRECT .......-- W' -----... -- :--: 6-10731 Never service the Bobcat loader without instructions. \ \, CORRECT \ 6-13561 A Cleaning and maintenance is required daily. 8-13562 CORRECT A Keep rear door closed except for service. Close and latch door before operating loader. Use the correct procedure to lift or lower operator cab. A Follow the correct operator cab lifting and lowering procedure shown for this model. 6-13574 Have good ventilation when welding or grinding painted parts. Wear dust mask when grinding painted parts. Toxic dust and gas can be produced. WRONG A Never work on loader with lift arms up unless lilt arms A are held by a lift arm support device. Never modify equipment or add attachments not approved by Melroe Company. : l 6-13575 9-93

MAINTENANCE SAFETY (Cont'd) Instructions are necessary before operating or servicing machine. Read Operation & Maintenance Manual, Handbook and signs (decals) on machine. Follow warnings and instructions in the manuals when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Failure to follow instructions can cause injury or death. W-2003-1089 A. Safety Alert Symbol: This symbol is used for important safety messages. When you see this symbol, follow the safety message to avoid personal injury or death. :~_\.~' r-<"~:'~ ) /'::"~_: r 11 ] ---- / : t~'--' .fi.:.A .... '-.-' > ."~ .1- .Ii'; . 1 I ~, .... ~' ,', ~,' )'-'>' .~ ~j{~'c - .'V,-' ,~<\ -( ,\ " ., -/_.. . • ) ',)' \[. - ., \. 1 !~) ..-/' reP \l3;;(-':}-~ S~.-.~. y WRONG 8-3724 Vent exhaust to outside when engine must be run for A service. "'Avoid exhaust fume leaks which can kill without warning. Exhaust system must be tightly sealed. WRONG 8-13576 Stop, cool and clean engine of flammable materials A before checking fluids. Never service or adjust loader with the engine running A unless instructed to do so in the manual. Avoid contact with leaking hydraulic fluids or diesel fuel which is under pressure. It can penetrate the skin or eyes. ~ Never fill fuel tank with engine running, while smoking or when near open flame. WRONG ~iiiiiiiiilih--8-13577 Keep body, loose objects and clothing away from A moving parts, electrical contacts, hot parts and exhaust. Wear eye protection to guard from battery acid, compressed springs, fluids under pressure and flying debris when engines are running or tools are used. WRONG ~h \') Lead-acid batteries produce flammable and explosive A gases. Keep arcs, sparks, flames and lighted tobacco away A from batteries. Batteries contain acid which burns eyes or skin on contact. Wear protective clothing If acid contacts body, flush well with water. For eye contact flush well and get immediate medical attention. .... 8-6589 9-93

CONTENTS FOREWORD ...................................................... ii SAFETY INSTRUCTIONS ........................................... v SERIAL NUMBER LOCATIONS ..................................... vii DELIVERY REPORT ............................................... vii BOBCAT LOADER IDENTIFICATION ................................ viii PREVENTIVE MAINTENANCE .................................... 1-1 HYDRAULIC SYSTEM ............................................ 2-1 HYDROSTATIC SySTEM ......................................... 3-1 DRIVE SYSTEM ................................................. 4-1 MAIN FRAME ................................................... 5-1 ELECTRICAL SYSTEM ........................................... 6-1 ENGINE SERVICE ............................................... 7-1 BICSTM/BOSS® SYSTEM ......................................... 8-1 SPECIFICATIONS ............................................... 9-1 CALIFORNIA PROPOSITION 65 WARNING Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects and other reproductive harm. PREVENTIVE MAINTENANCE HYDRAULIC SYSTEM HYDROSTATIC SYSTEM DRIVE SYSTEM MAIN FRAME ELECTRICAL SYSTEM ENGINE SERVICE BICS I :vI/BOSS® SYSTEM SPECIFICATIONS 873 Loader Service Manual I I I ~

FOREWORD This manual is for the Bobcat loader mechanic. It provides necessary servicing and adjustment procedures for the Bobcat loader and its component parts and systems. Refer to the Operation & Maintenance Manual for operating instructions, starting procedure, daily checks, etc. A general inspection of the following items must be made after the loader has had service or repair: 1. Check that the ROPS/FOPS (Including sidescreens) is in good condition and is not modified. 2. Check that ROPS mounting hardware is tightened and is Melroe approved. 3. The seat belt must be correctly installed, functional and in good condition. 4. The seat bar and pedal interlocks must be correctly adjusted, clean and lubricated. 5. Machine signs must be legible and in the correct location. 6. Steering levers and foot pedals must return to neutral. 7. Check for correct fu ntion of the work lights. 8. The parking brake function correctly. must lflJ I , It . . I '.. . .-.... ~t '~ I : ... () /11" ® ii 9. Enclosure door latches must open and close freely. 10. Bob-Tach wedges and linkages must function correctly and be in good condition. 11. Safety treads must in good condition. 12. Check for correct function of indicator lamps (Optional on some models). 13. Check hydraulic fluid level, engine oil level and fuel supply. 14. Inspect for fuel, oil or hydraulic fluid leaks. 15. Lubricate the loader. 16. Check the condition of the battery and cables. .- £a ma 873 Loader Service Manual

17. Inspect the air cleaner for damage or leaks. Check the condition of the element. 18. Check the electrical charging system. <?l:: 19. Check tires for wear and pressure. 20. Inspect for loose or broken parts or connections. 21. Operate the loader and check all functions. 22. Check for any field modification not completed. Recommend to the owner that all necessary corrections be made before the machine is returned to service. .'·')H" ')H";)HH'H"~I~~ '''''''''''~ • t .. iii 873 Loader Service Manual

iv 873 Loader Service Manual

SAFETY INSTRUCTIONS The faUowin!1 publications provide information on the safe use and maintenance of the loader and attachments: • The DelivElry Report is used to assure that complete instructions have been given to the new owner and that the machine is in safe operating condition. • The Opelalion & Maintenance Manual delivered with the loader gives operating information as well as routine maintenar,ce and service procedures. It is a part oflhe loader and must stay with the machine when it is sold. Replacement Operation & Maintenance Manuals can be ordered from your Bobcat loader dealer. • The loader has machine signs (decals) which instruct on the safe operation and care. The signs and their locations are shown in the Operation & Maintenance Manual. Replacement signs are available from your Bobcat loader deafer. • The loader has a plastic Operator's Handbook fastened to the operator cab . Its brief instructions are convenient to the operator. - he handbook is available from your dealer in English edition or French, German, Italian, Dutch & Spanish editions. • The EMI ~ .. afety Manual (available in Spanish) delivered wi th the loader gives general safety information. • The Servit:e Manual and Parts Manual are available from your dealer for use by mechanics to do shop-type service and repair wor <. • The Skid- :3teer Loader Operator Training Course is available through your local dealer. This course is intended to provide rules and practices for correct operation of the Bobcalloader. The course is available in English and Spanish versions. v 873 lo ader Service Manual

SAFETY INSTRUCTIONS (Cont'd) IMPORTANT This notice identifies procedures which must be followed to avoid damage to the machine. 1-2019-0284 • Safety Alert Symbol: This Safety Symbol is used for important safety messages. When you see this symbol follow the safety message to avoid personal injury or death. • Wear tight fitting clothing . Always wear safety glasses when maintaining or servicing loader. Safety glasses, hearing protection or loader special applications kit are required for some work. See your dealer for Melroe Safety equipment. • Know where fire extinguishers and first aid kits are located and how to use them. • Do not use the Bobcat loader where exhaust, arcs, sparks or hot components can contact flammable material, explosive dust or gases. • The engine compartment and engine cooling system must be inspected every day and cleaned if necessary to prevent fire hazard and overheating . • Check all electrical wiring and connections for damage. Keep the battery terminals clean and tight. Repair or replace any damaged part. • Check fuel and hydraulic tubes, hoses and fittings for damage and leakage. Never use open flame or bare skin to check for leaks. Tighten or replace any parts that show leakage. Always clean fluid spills. Do not use gasoline or diesel fuel for cleaning parts. Use commercial nonflammable solvents. • Follow any environmental safety regulations when disposing of used fluids such as engine oil, grease or anti-freeze. • Do not use ether or starting fluids on this engine. It has glow plugs. These starting aids can cause explosion and injure you or bystanders. • Always clean the loader and disconnect the battery before doing any welding. Cover rubber hoses, battery and all other flammable parts. Keep a fire extinguisher near the loader when welding. Have good ventilation when grinding or welding painted parts. Wear dust mask when grinding painted parts. Toxic dust or gas can be produced . • Stop the engine and let it cool before adding fuel. No smoking! • Use the procedure in the Operation & Maintenance or Service Manuals for connecting the battery. A fire extinguisher is available from your local dealer. The fire extinguisher can be installed in the location shown [A]. 873 Loader Service Manual vi

SERIAL NUMBER LOCATIONS Always use the serial number of the loader when requesting service information or when ordering parts. Early or later models (identification made by serial number) may use different parts, or it may be necessary to use a different procedure in doing a specific service operation. LOADER SERIAL NUMBER The loader serial number plate is located on the outside of the loader frame [A]. Explanation of loader Serial Number: Module 2. - Production Sequence (Series) Module 1. - Model/Engine Combination The four digit Model/Engine Combination module number identifies the model number and engine combination. This number (in parenthesis beside the model number) is used in the Service Manual to more easily identify the standard, optional and field accessory equipment included or available for each specific model. The five digit Production Sequence Number identifies the order which the loader is produced. ENGINE SERIAL NUMBER The serial number is located on the valve cover at the right side of the engine [B]. DELIVERY REPORT The Delivery Report must be filled out by the dealer and signed by the owner or operator when the Bobcat loader is delivered. An explanation of the form must be given to the owner. Make sure it is filled out completely [C]. c vii I .. - ' =--- ..... _ ......... . ;:;=::0:::::::0:= 873 l oade r Serv ice Manual

Bobcat 873 Skid Steer Loader Service & Repair Manual

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