Part of the Case Repair Manuals.
Wrestling with a grader transmission that shifts hard or slips under load? This 865-page Case 845, 865, 885 Service Manual PDF (OEM #6-46503) covers all three motor graders, with dedicated transmission teardown, pressure check, and diagnostic code sections for the 845-865 and the 885. You get complete electrical diagrams, hydraulic schematics with removal and installation procedures, plus full service coverage of steering valves, differential lock rear axles, tandem drives, brakes, and the air conditioning system. Troubleshooting charts walk you through clutch actuation, solenoid voltage checks, and suction leak tests. Torque the starter bolts to 41-74 Nm and set your 1/2-inch 37-degree flare fittings between 20 and 57 Newton metres. Forum threads won't rebuild a tandem Case. This scanned factory PDF is bookmarked by section; load it on any device, jump straight to the chapter, and get wrenching.
What's Inside This Case 845, 865, 885 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 4-43 | Special Tools - Cross Reference Guide, Standard Torque Specifications, Fluids and Lubricants, Metric Conversion Chart, Service Tools, Loctite Product Chart |
| Engines | 44-53 | Charge Air Cooler |
| Fuel System | 54-55 | |
| Electrical | 56-119 | Removal and Installation of Starter and Alternator, Electrical Diagram, Battery, Alternator 45 Ampere |
| Steering | 120-159 | Front Wheel, Axle and Wheel Lean, Steering Control Valve, Steering Priority Valve |
| Transmission Specifications, Pressure Checks, and Troubleshooting (845-865 Grader) | 160-217 | Special Tools, Specifications, Theory of Operation Clutch Actuation, Gear Selection, Hydraulic System, Clutch Solenoid Voltage Requirements, Test Solenoids, Suction Leak Test, 8-4 Power Flow Forward and Reverse Speeds, Troubleshoot Transmission System Malfunctions, Powershift Troubleshooting, Transmission Control Unit (Tcu) Calibration, System Components (Mpu Sensors, Electronic Gear Selector, Temperature Sensor, Inching Pedal, Tvp), J1-J6 Connector Pinouts, Transmission Wiring Harness, Proportional Valves, System Errors, Analog Tcu Diagnostic Codes |
| Transmission Specifications, Pressure Checks, and Troubleshooting (885 Grader) | 218-273 | Special Tools, Specifications, Theory of Operation Clutch Actuation, Gear Selection, Hydraulic System, Clutch Solenoid Voltage Requirements, Test Solenoids, Suction Leak Test, 8-4 Power Flow Forward and Reverse Speeds, Troubleshoot Transmission System Malfunctions, Powershift Troubleshooting, Transmission Control Unit (Tcu) Calibration, System Components (Mpu Sensors, Electronic Gear Selector, Temperature Sensor, Inching Pedal, Tvp), J1-J6 Connector Pinouts, Transmission Wiring Harness, Proportional Valves, System Errors, Analog Tcu Diagnostic Codes |
| Transmission (845-865 Grader) | 274-419 | Transmission Component Identification, Transmission Mounting and Sensor, Charge Pump, Direct Drive Input Assembly, Control Valve, Main Case Front Housing, Gear Ratio Group, Main Case Rear Housing, Brake Group, Replace Connectors |
| Transmission (885 Grader) | 420-551 | Transmission Component Identification, Transmission Mounting and Sensor, Charge Pump, Direct Drive Input Assembly, Control Valve, Main Case Front Housing, Gear Ratio Group, Main Case Rear Housing, Brake Group, Replace Connectors |
| Rear Axle with Differential Lock | 552-587 | Differential Assembly, Pinion and Cage Assembly, Hydraulic Pressure Test, Spiral Bevel Gear Contact |
| Limited Slip Rear Axle (845-865 Grader) | 588-627 | Axle Section, Oil Change Procedure, Brake Disc Pack, Differential Assembly, Limited Slip Differential |
| Tandem Drive Limited Slip Rear Axle (845-865 Grader) | 628-649 | Special Tools, General Description, Disassembly of the Tandem and Rear Axle Removal and Installation, Rear Axle Removal and Installation, Assembly of the Tandem, Tandem Case Oscillation Adjustment, Determination of the Shim Pack |
| Tandem Drive Differential Hydraulic Lock | 650-665 | General Description, Disassembly of the Tandem and Rear Axle Removal and Installation, Rear Axle Removal and Installation, Assembly of the Tandem, Tandem Case Oscillation Adjustment, Determination of the Shim Pack |
| Brakes | 666-691 | Hydraulic Brake Troubleshooting, Brake Pedal Valve System |
| Hydraulics | 692-757 | Removal and Installation of Hydraulic Components, Hydraulic Schematics |
| Mounted Equipment | 758-865 | Air Conditioning Troubleshooting, Air Conditioner System Operating Instructions, Air Conditioner System Service, Removal and Installation of Air Conditioning Components, Rear Ripper, Frame, Articulation Joint, Circle and Scarifier, Front Blade and Counterweight, ROPS Cab, Cab Glass Installation |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Torque for 1/4 inch (6.4 mm) 37 Degree Flare Fitting | 72 to 144 Pound Inches (8 to 16 Newton metres) | p. 16 |
| Torque for 5/16 inch (7.9 mm) 37 Degree Flare Fitting | 96 to 192 Pound Inches (11 to 22 Newton metres) | p. 16 |
| Starter bolt torque | 41 to 74 Nm (30 to 54 pound-feet) | p. 60 |
| Alternator support bracket bolt torque | 60 to 104 Nm (42.5 to 76 pound-feet) | p. 61 |
| Alternator D+ terminal nut torque | 3.5 to 3.9 Nm (2.6 to 2.9 pound-feet) | p. 61 |
| Maximum tank line back pressure | 300 psi | p. 155 |
| Alternator Torque Nut for Pulley | 60 to 73 Nm | p. 104 |
| Steering Control Valve Cap Screws Torque | 31 Nm | p. 144 |
| Steering Priority Valve Spool Orifice Screws Torque | 7.3 to 9.6 Nm | p. 157 |
| Air Conditioning System Refrigerant Capacity | 1.6 kg | p. 802 |
| Rear Ripper 845 Mounting Torque | 290 to 310 Nm | p. 848 |
Case 845, 865, 885 Common Problems This Manual Covers
Case 845 grader starter clicks but engine won't crank, battery reads full charge
Check battery voltage and clean both cable ends before condemning the starter. Test voltage drop across the solenoid contacts while cranking. If the starter is dead, pull it from the left side of the engine per the removal procedure on page 60 and torque the new mounting bolts to 41 to 74 Nm (30 to 54 pound-feet).
Manual Section: Electrical p. 60Alternator stopped charging, battery warning light stays on with engine at full operating speed
Check belt tension and the B+ terminal connection first; torque that nut to 15 to 27 Nm per page 61. If output is still dead, bench test the alternator: rotor resistance should read 8.1 to 9.9 ohms and brushes must measure at least 7 mm (0.27 inch), specs listed on page 104.
Manual Section: Electrical p. 104Blade drifts down during grading passes, hydraulic controls feel spongy and slow to respond
Inspect the moldboard lift cylinder fittings and hoses for weeping seals; a slow drip on the return side pulls air into the system. Retighten any leaking 37 degree flare fittings, a 3/8 inch line takes 14 to 34 Nm per the torque chart on page 16. Replace cracked O-rings before pressure testing the circuit.
Manual Section: Hydraulics p. 692Steering wheel hard to turn at idle, effort improves once engine speed comes up
Check tank line back pressure first; anything over 300 psi, the maximum listed on page 155, points to a restricted return line rather than the valve. If pressure checks good, pull the steering priority valve and inspect the spool for scoring, then torque the spool orifice screws to 7.3 to 9.6 Nm on reassembly per page 157.
Manual Section: Steering p. 155Air conditioner blows warm, compressor cycles on and off rapidly in hot weather
Check refrigerant charge; the system holds 1.6 kg of HFC 134A, spec on page 802. Rapid compressor cycling usually means low charge from a leaking hose or condenser seal. Recover what remains, pressure test with nitrogen, repair the leak, then evacuate and recharge to the full 1.6 kg capacity.
Manual Section: Mounted Equipment p. 802Frequently Asked Questions
What are the torque specifications for the starter bolts on the Case 885 grader?
The starter bolts for the Case 885 grader should be torqued to 41 to 74 Nm (30 to 54 pound-feet). p. 60
What are the alternator mounting bolt torque specifications for the Case 845-885 graders?
The alternator mounting bolts for the Case 845-885 graders should be torqued to 60 to 104 Nm (42.5 to 76 pound-feet). p. 61
What is the engine oil capacity for a Case 845 grader with a filter change?
The engine oil capacity for a Case 845 grader with a filter change is 16.4 liters (4.3 US Gal). p. 20
What is the correct torque for the transmission input shaft seal installer on Case 845-885 graders?
The transmission input shaft seal installer is not a fastener, but the transmission input seal installation requires specific tools. The torque for the transmission input shaft seal installer is not applicable, but the transmission input shaft seal itself is installed using tool 380000387 for models 845 and 865. p. 38
What is the service interval for changing the transmission oil on a Case 845 grader?
The transmission oil on a Case 845 grader should be changed every 1000 hours of operation. p. 26
Do I get instant access to this Case 845 Service Manual?
Immediate download of the complete 865-page scanned Service Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Is printing allowed for this Case 845 Service Manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
