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| G970 | G976 | G990 |
Tandems |
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Depth | in (mm) | 8.9 (226,5) | 8.9 (226,5) | 8.9 (226,5) |
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Height | in (mm) | 24.25 (616) | 24.25 (616) | 24.25 (616) |
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Thickness |
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inner wall | in (mm) | 1 (25) | 1 (25) | 1 (25) |
outer wall | in (mm) | .78 (20) | .78 (20) | .78 (20) |
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Center distance | in (mm) | 61 (1 550) | 61 (1 550) | 66 (1 675) |
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Drive chain pitch | in (mm) | 2 (51) | 2 (51) | 2 (51) |
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Oscillation | degrees ± | 15º | 15º | 15º |
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Differential / Final drive |
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Model |
| Volvo APR90 | Volvo APR90 | Volvo APR90 |
Planetary final reduction with an operator controlled lock/unlock differential.
Wheels & tires (Standard equipment) |
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Tire size |
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| 14:00 x 24, | 14:00 x 24, | 16:00 x 24, |
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Ply rating (PR) |
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| 12 | 12 | 12 |
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Rim size |
| in (mm) | 10 (254) | 10 (254) | 10 (254) |
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| One piece rim | Three piece rim | One piece rim |
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Yes | No | Yes | |||
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Front axle and articulation |
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Wheel lean |
| degrees R & L | 18º | 18º | 18º |
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Oscillation | degrees up & down | 16º | 16º | 16º | |
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Ground clearance |
| in (mm) | 22 (551) | 22 (551) | 23.5 (596) |
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Minimum turning radius using front axle steering, | in (mm) | 312 (7 925) | 312 (7 925) | 321 (8 150) | |
articulation, wheel lean and unlocked differential |
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Steering arc |
| degrees | 50º | 50º | 50º |
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Frame articulation angle |
| degrees | 21º | 21º | 21º |
Hydrostatic power steering of front wheels incorporating two steering cylinders. Meets SAE J1511 FEB. 94, ISO 5010:1992 with optional secondary steering.
Brakes
Service Brakes: Foot operated
Fade resistant, hydraulically actuated, wet multiple disc service brakes located at the 4 tandem drive wheels are fully sealed and maintenance free.
System features crossover dual braking circuits for uniform braking on both sides of the grader. Includes reserve power assist and operator warning system (visual and audible).
Parking Brake
Spring applied hydraulically released enclosed wet multiple disc type parking brake in final drive. Effective on all 4 tandem drive wheels. Transmission cannot be engaged with park brake on.
Braking systems comply to SAE J/EN ISO 3450:1996.
Volvo uses asbestos free brake components.
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