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Technical Supports

Technical Supports

Bevel Gearboxes O & M Manuals

Please read this entire document prior to operating the bevel gearbox. Bevel gearbox failure or injury to operators may be caused by improper installation, operation or maintenance.
 
Installation Instructions
Bevel gearboxes must be mounted on a rigid, structurally sound baseplate. Ensure that bevel gearbox mounting pads rest evenly on the baseplate. The use of shims may be required to avoid housing distortion which could alter the gear mesh or cause premature bearing failure.
The bevel gearbox may be driven by direct coupling, flexible coupling, or V-belt drive. Couplers should require only a light force to install. The drive line must be accurately aligned within the equipment manufacturer's requirements to limit operating loads and minimize thrust loads on the bevel gearbox shaft. V-belt drives must be mounted close to the housing to minimize excessive overhung loading which could result in early bearing or shaft failures. Sheaves must fit correctly. At installation, a tight forced fit could move the shaft from its normal position and cause internal damage. A loose fit could induce excessive vibration during operation and cause shaft damage or breakage.
Warning: When mounting the bevel gearbox, the buyer is responsible to properly determine the quality or grade of fastener, thread engagement, load carrying capacity, and torque requirements.
Warning: The buyer is responsible to provide protective shields over all external rotating parts, couplers, or shaft extensions mounted on or with the bevel gearbox. Protective clothing must be worn when installing or maintaining the bevel gearbox and operating system. Initial operation should be carried out under no-load conditions. Before applying power to the bevel gearbox installation, review the following:
1. Check tightness of mounting bolts.
2. Check for proper oil level in bevel gearbox.
3. Be certain that tools, debris, etc., are clear from rotating parts.
4. Rotate shafts by hand. If they do not rotate freely, check for uneven mounting, coupling misalignment or excessive belt tension.
If all tests are satisfactory, make connections to shafts, ensure that all safety devices are in place, and begin operation.
 
Lubrication Instructions
All bevel gearboxes are factory tested prior to shipment. They include the correct amount of oil unless specified by the customer to be shipped dry. Shaft bearings are splash lubricated and partially submerged in oil when the bevel gearbox is mounted horizontally. After installation, remove the dipstick and verify correct oil level. If no dipstick is provided, determine level by any appropriate method. In general, the oil level should be approximately half the depth of the bevel gearbox for horizontal mounting, or to the shaft centerlines, if mounted other than horizontally.
Caution
1. Prior to operation, make sure the bevel gearbox contains the correct amount of oil. If under-filled or over-filled, damage to the bevel gearbox or injury to personnel may result.
2. For bevel gearboxs operating in an ambient temperatures of -20 Deg. C and +85 Deg. C, special temperatures, please contact Jacton engineers.
3. Bevel gearbox lubricant is industrial liquid gear oil. When low speed less than 100Rpm, optional grease lubricant.
4. Do not combine synthetic with non-synthetic oils in the bevel gearbox.
 
Maintenance Instructions
Warning
1. Disconnect power prior to any maintenance and do not bypass or inactivate any safety or protective device. Lock out and tag the power supply to prevent unexpected application of power.
2. Routinely inspect mounting bolts, couplers,or other power transmitting devices to ensure all parts are firmly anchored. Keep shafts and vent plugs (when included) clean to prevent foreign particles from entering seals or housing. Inspect daily for any oil leaks and any unusual noises. Inspect weekly for end play in shafts. Inspect belt drive tension after the first ten hours of operation and periodically thereafter.
3. Check the oil level every 24 hours of operation. In the beginning to change the oil when the bevel gearbox has been in service for two weeks or 100 ~ 200 hours. Routine oil change intervals will vary for each particular installation depending on the severity of the environment. Normal changes should occur half ~ 1year or 1000 ~ 2000 hours of operation. The longest life at continuous service will be realized when the oil temperature does not exceed +85 deg. C. For oil substitutions, or for high input speeds, contact JACTON engineers.
4. Do not change or add oil while the bevel gearbox is running. Damage to the bevel gearbox or injury to personnel may result. The bevel gearbox housing, oil, plugs, and associated components may reach high temperatures and cause severe burns. Use extreme care when servicing the bevel gearbox.
 
Trouble Shooting
Breather Leaking
Probable: 1. incorrect oil level, 2. speed rpm too high, 3. gear box running hot.
Remedy: 1. check oil level, 2. reduce speed rpm, 3. provide additional cooling.
Gearbox Running Hot
Probable: 1. Incorrect oil level, 2. inadequate air flow, 3. excessive rpm or load, 4. contaminated oil, 5. failing bearing.
Remedy: 1. check oil level, 2. provide additional cooling, 3. change to synthetic oil, 4. replace oil, 5.replace bearing.
Unusual Noise
Probable: 1. gear mesh changed, 2. excessive external load, 3. failing bearings or gears.
Remedy: 1. inspect drive line, 2. inspect belt tension, 3. replace bearings or gears.
Oil Leaking   
Probable: 1. failing seals, 2. mating surfaces
Remedy: 1. replace seals, 2. rebuild gearbox
Vibration  
Probable: 1. loose mounting bolts, 2. loose couplers, 3. pulleys, 4. failing bearings and gears, 5. drive line misalignment. 
Remedy: 1. inspect/tighten, 2. inspect/tighten, 3. replace bearings or gears, 4. correct misalignment.