Motor graders are precision machines — the articulation joint, circle drive, and blade tilt systems must all operate within tight tolerances for the machine to cut a consistent grade. When the circle drive develops chatter, when the blade drifts under load, or when the articulation joint develops play, the service manual is the only document that gives you the correct clearance limits, shimming procedures, and hydraulic pressure settings to restore factory performance.
Manual Reference: 6-45010 ENG — CASE 845, 865, 885 Graders
The CASE Corporation service manual 6-45010 ENG covers three production models — the 845, 865, and 885 motor graders — with differences between models noted in each section. The 885 is the flagship 185 hp unit; the 845 runs 135 hp and the 865 runs 155 hp. All three share the same articulated chassis and circle drive design:
- Section 1003 — Frame, Articulation Joint, Circle, Scarifier and Ripper: This is the most referenced section for grader-specific repair. The articulation hitch uses tapered roller bearings allowing 50 degrees of total articulation. The manual specifies the preload procedure for the hitch bearings and documents the maximum allowable play before rebuild is required.
- Circle Drive: The circle ring gear is driven by a hydraulic motor through a worm gear reducer. The manual covers ring gear backlash limits, the shimming procedure for the circle center pin, and blade side-shift cylinder seal replacement. Circle drive motor case drain flow limit is documented for diagnosing circle motor wear.
- Scarifier and Ripper: Frame-mounted front scarifier and rear ripper cylinder service, including rebuild dimensions for the scarifier tooth shanks.
- Hydraulic System: Main circuit and steering circuit pressures, blade lift cylinder cushion valve settings, and the circle drive relief valve location and adjustment procedure. Main relief: 241 bar (3,500 psi). Steering relief: 172 bar (2,500 psi).
- Powershift Transmission: 6-speed Powershift with direct-drive reverse. Clutch pack service intervals and oil pressure test values at the transmission test port.
- Tandem Drive Axle: Tandem chain tension adjustment — this is specific to the grader and differs significantly from single-axle equipment. The manual shows the chain tension measurement method and the sprocket wear limit that triggers replacement.
Key Specifications — CASE 845/865/885
- Articulation joint: 25 degrees each side (50 degrees total)
- Hydraulic main relief: 241 bar / 3,500 psi
- Steering circuit relief: 172 bar / 2,500 psi
- Blade side-shift stroke: 580 mm
- Tandem chain oil specification: EP 80W-90 gear oil
- Transmission oil: UTTO (MS-1210 specification)
Full Motor Grader Collection — 52 PDFs
- Case Motor Graders — 845, 865, 885 and earlier production models
- Fiat-Allis Series — Complete Fiat-Allis motor grader range with hydraulic schematics
- New Holland F-6 Series — F106.6, F106.6A
- New Holland F-8 Series — F156.6, F156.6A
- New Holland F-B Series — Heavy-duty NH grader range
- New Holland G and RG Series — G and RG grader variants
- Repair Time Manuals — F106.6, F170, F156.6 labor time guides for major operations
Download the Motor Grader Manual Collection
Frequently Asked Questions
How do I adjust the circle drive backlash on the 865?
The circle ring gear backlash is adjusted via shims at the worm gear housing mounting. The manual specifies the maximum backlash (1.5 mm) and the shimming procedure using the measurement tool described in the special tools section.
Are the 845 and 885 service procedures interchangeable?
The articulation joint, circle drive, and hydraulic system procedures are identical. Engine and transmission service differs — the 885 uses the larger 6-cylinder FPT engine (in this collection) while the 845 runs the 4-cylinder variant.
Does the collection include the older Fiat-Allis FG-series graders?
Yes. The Fiat-Allis series in this collection covers the FG-85, FG-100, and larger variants with their original Fiat-Allis documentation in English.
