Johnston Sweepers

Additional Notes

• The Johnston Sweepers CN400 and CX400 rear differentials share identical fluid capacity figures across all four configurations listed. The service fill capacity is 3.9 liters, while the dry fill capacity rises to 4.5 liters. The dry fill figure applies when the differential housing has been fully drained or disassembled, requiring additional fluid to prime internal passages and fill voids that residual fluid would otherwise occupy during a standard service change.
• The 0.6-liter difference between the service fill and dry fill capacities reflects the volume of fluid retained within the differential during a routine drain. Overfilling a differential to the dry fill volume during a standard service change, rather than a rebuild or overhaul, risks seal damage and fluid aeration.
• The check interval for all four configurations is set at 500 hours. A fluid level check at this interval does not involve a full drain and refill, serving instead as a condition monitoring step to detect leaks or abnormal consumption between full change intervals.
• The change interval is expressed as a dual condition: 12 months or 2,000 hours, whichever comes first. Expressing an interval this way accounts for machines that accumulate operating hours slowly, ensuring time-based fluid degradation is addressed even when hour thresholds are not reached within a calendar year.
• The Euro 5 and Stage 3a designations on both the CN400 and CX400 refer to emissions standards rather than mechanical differences in the drivetrain. Despite the differing engine compliance standards, the rear differential fluid capacities and service intervals are identical across all four variants listed.