BIM 1013/2008/11
Page 3 of 10
www.nord.com
WARNING:
LOCK OUT POWER before any maintenance is performed.
Make absolutely sure that no voltage is applied while work is
LOCATION
Coupling hubs shouId be mounted flush with the shaft ends,
unless specificaIIy ordered for overhung mounting. Pinions,
sprockets and sheaves shouId be mounted as close as possible
to the unit housing to minimize bearing Ioads and shaft
deflections.
COUPLING ALIGNMENT
Shaft couplings should be instaIIed according to the coupling
manufacturer’s recommendations for gap, angular and paraIIeI
aIignment. In many instaIIations, it is necessary to aIIow for
thermaI and mechanicaI shaft movement when determining shaft
aIignment. The coupIing manufacturer’s recommendations
shouId be foIIowed.
AXIAL DISPLACEMENT
The gap between shaft ends shouId be the same as the specified
coupIing gap unless overhung mounting of the coupIing hub is
specified. The coupIing gap and shaft gap must be sufficient to
accommodate any anticipated thermal or mechanicaI axiaI
movement.
ANGULAR ALIGNMENT
Insert a spacer or shim stock equal to the required coupIing gap
between the coupIing hub faces and measure the clearance using
feeler gauges. Repeat this at the same depth at 90-degree
intervals to determine the amount of angular misalignment.
PARALLEL ALIGNMENT
Mount a dial indicator to one coupIing hub, and rotate this hub,
sweeping the outside diameter of the other hub. The paraIIeI
misalignment is equal to one-half of the total indicator reading.
Another method is to rest a straight edge squarely on the outside
diameter of the hubs at 90-degree intervals and measure any
gaps with feeler gauges. The maximum gap measurement is the
paraIIeI misalignment.
CHECKING ALIGNMENT
After both angular and paraIIeI alignments are within specified
Iimits, tighten aII foundation boIts securely and repeat the above
procedure to check aIignment. If any of the specified Iimits for
aIignment are exceeded, realign the coupIing.
SPROCKET OR SHEAVE ALIGNMENT
AIign the sheaves or sprockets square and paraIIeI by placing a
straight edge across their faces. AIignment of bushed sheaves
and sprockets shouId be checked after bushings have been
tightened. Check horizontal shaft aIignment by placing a IeveI
verticaIIy against the face of the sheave or sprocket. Adjust beIt
or chain tension per the manufacturer’s specified procedure.
OUTBOARD PINION ALIGNMENT
Align the pinion by adjusting the gear tooth clearance according to
the manufacturer’s recommendations and checking for acceptable
outboard pinion tooth contact. The foundation boIts may have to
be Ioosened and the unit moved slightly to obtain this contact.
When the unit is moved to correct tooth contact, the prime mover
shouId be realigned.
RECHECK ALIGNMENT
After a period of operation, recheck aIignment and adjust as
required.
1.
Properly install unit on a rigid foundation
•
adequately
supported
•
securely bolted into place
•
IeveIed so as not to distort the gear case
2. Properly install couplings suitable for the application and
connected equipment.
3.
Ensure accurate aIignment with other equipment.
4.
Furnish and install adequate machinery guards as needed to
protect operating personnel and as required by the
applicable standards of the Occupational Safety and Health
Administration (OSHA), and by other applicable safety
regulations;
5. Ensure that driving equipment is running in the correct
direction before coupling to reducers with backstops
(designed to operate onIy in a specific direction) or
machinery designed to operate only in one direction.
CHANGES IN PERFORMANCE SPECIFICATIONS
The owner has the responsibility to consult with NORD GEAR if
such items such as applied Ioads, operating speeds or other
operating conditions have changed.
START-UP
1. Ensure that switches, alarms, heaters, coolers and other
safety and protection devices are instaIIed and operational
for their intended purpose.
2.
Verify that the installed mounting position is the same as the
nametag mounting position. If not, relocate the vent plug, fill
plug and drain plug according to the tables on pages 5-7 and
make the necessary adjustments to the oil level.
OPERATION AND MAINTENANCE CHECKLIST
1.
Operate the equipment as it was intended to be operated
2.
Do not overload.
3.
Run at correct speed.
4.
Maintain Iubricant in good condition and at proper IeveI.
5.
Dispose of used Iubricant in accordance with applicable Iaws
and regulations.
6.
Apply proper maintenance to attached equipment at
prescribed intervals recommended by the manufacturer.
7. Perform periodic maintenance of the gear drive as
recommended by NORD.
