Please read this entire document prior to operating the miter gearbox. miter gearbox failure or injury to operators may be caused by improper installation, operation or maintenance.

Installation Instructions
miter gearboxes must be mounted on a rigid, structurally sound baseplate. Ensure that miter 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 miter 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 miter 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 miter 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 miter gearbox. Protective clothing must be worn when installing or maintaining the miter gearbox and operating system. Initial operation should be carried out under no-load conditions. Before applying power to the miter gearbox installation, review the following:
1. Check tightness of mounting bolts.
2. Check for proper oil level in miter 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 miter 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 miter 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 miter gearbox for horizontal mounting, or to the shaft centerlines, if mounted other than horizontally.
Caution
1. Prior to operation, make sure the miter gearbox contains the correct amount of oil. If under-filled or over-filled, damage to the miter gearbox or injury to personnel may result.
2. For miter gearboxs operating in an ambient temperatures of -20 Deg. C and +85 Deg. C, special temperatures, please contact Jacton engineers.
3. JT series miter gearbox lubricant is medium-duty industrial gear oils. When low speed less than 100Rpm, optional grease lubricant. JTP series and JTA series miter gearbox with grease lubrication. 
4. Do not combine synthetic with non-synthetic oils in the miter 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. The first oil change must be carried out after approx. 300-400 operating hours. Further oil changes are necessary after every 1000-1500 operating hours. 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 miter gearbox is running. Damage to the miter gearbox or injury to personnel may result. The miter gearbox housing, oil, plugs, and associated components may reach high temperatures and cause severe burns. Use extreme care when servicing the miter 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.