Proper maintenance is necessary for getting the optimal performance and longest life out of your gearbox. Standard oil change intervals are after the first 500 hours, then every 2000 hours. Lower duty cycles or the use of synthetic oils may allow for longer change intervals. Continuous high speed or heavy load applications could require shorter change intervals.
It is also important to maintain the proper oil level. Too little oil results in insufficient lubrication and cooling. Too much oil can cause overheating due to excess shear friction. Standard oil level sight glasses and optional external oil gauges are available to monitor the gearbox oil level.
The oil or grease within the gearbox lubricates and transfers heat to cool the gearbox. The majority of heat is generated by oil shear, bearing friction, and seal friction. During normal operation and speeds, the gears and bearings are adequately lubricated by oil splash and misting. An acceptable temperature range is up to 100° C (212° F), normally seen at maximum design speed. If higher temperatures are being generated, additional cooling methods will be required.
For all spiral bevel gearboxes and speed correction drives, the oil sight glass is located in position 1. The exception is for B1, C1, D1, E1, and F1 spiral bevel gearboxes with a ratio of 1:1 – the oil sight glass is located in position 2.
A standard viscosity oil is included with each gearbox. Although alternate oil viscosity can be used, depending on the application, we do not recommend using heavy weight gear oil! This type of oil may cause excessive heat and gear tooth wear.
The lubricant should be changed every 2000 hours but not to exceed every 5000 operating hours (2 years maximum). To avoid the risk of burns, allow the gearbox to cool to room temperature before changing the oil. The waste oil must be disposed of in accordance with local statutory regulations. The oil drain plug must be screwed back firmly into position before refilling with fresh oil. The gearbox must be refilled with mineral gear oil CLP according to DIN 51517-3 ISO VG 68. Grease filled gearboxes are maintenance free. The list below are approved suppliers and types of oil and grease.