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| G970 | G976 | G990 |
Circle |
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Pitch diameter | in (mm) | 64 (1 626) | 64 (1 626) | 64 (1 626) |
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Thickness | in (mm) | 1.25 (32) | 1.25 (32) | 2.0 (51) |
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Adjustable guide shoes - standard / optional |
| 3 / 5 | 3 / 5 | 5 / - |
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Adjustable clamp plates - standard / optional |
| 3 / 5 | 3 / 5 | 5 / - |
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Upper circle wear plates - standard / optional |
| 3 / 5 | 3 / 5 | 5 / - |
Circle to drawbar support is provided by DURAMIDE™ wear plates and bearings at the clamp and guide shoes. DURAMIDE™ prevents
Circle drive
The Volvo dual gear Circle Drive System uses direct acting hydraulic power for exceptional turning and holding capability under full load. Circle Drive System uses two hardened drive pinions and is protected against impact damage by an overload relief valve as standard equipment.
Rotation | degrees | 360º | 360º | 360º |
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Drawbar |
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Dimensions of box section | in | 6.5 x 6.5 | 6.5 x 6.5 | 6.5 x 6.5 |
| (mm) | (165 x 165) | (165 x 165) | (165 x 165) |
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Plate thickness | in (mm) | 1 & .75 (25 & 19) | 1 & .75 (25 & 19) | 1.5 & .75 (38 & 19) |
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Cab & controls |
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Low profile cab with ROPS/FOPS |
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Interior height | in (mm) | 64 (1 625) | 64 (1 625) | 64 (1 625) |
An optional full height cab is available with an inside height of 72.5” (1 842 mm).
All Volvo Grader cabs and canopies are designed to meet or exceed SAE J/ISO
The retractable seatbelt is 3” (76 mm) wide and meets SAE J386 NOV. 97 and EN ISO 6683:1999. Industry standardized control lever arrangement. Interior operator noise levels average 75 dB(A) per ISO 6394:1998 (enclosed cab).
Implement hydraulics
Circuit type: Closed center, load sense Proportional Demand Flow (PDF) Hydraulic System, with
Main implement pump type |
| Axial piston type | Axial piston type | Axial piston type |
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Maximum pressure | psi (Bar) | 3,000 (207) | 3,000 (207) | 3,000 (207) |
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Output 2100 RPM | gpm (lpm) | 55 (208) | 55 (208) | 55 (208) |
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Stand by pressure | psi (Bar) | 350 (24) | 350 (24) | 350 (24) |
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Filtration |
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Large capacity, replaceable
Hydraulic fan drive pump
Type
Axial piston pump dedicated to the variable speed cooling fan. Reversible cooling fan optionally available.
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