National Flooring Equipment 3397, Руководство по обслуживанию

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Maintenance
TAPER LOCK BUSHINGS (FIGURE 1)
Taper lock bushings are used to fit hubs onto shafts. Mounting and demounting requires
an Allen wrench of the correct size. Tightening or loosening is done with the same
threaded set screws.
The taper lock bushing is cylindrical on the inside; tapered and slit longitudinally on the
outside. The bushing has two blind half-holes (located across from one another) on its
outer diameter that correspond with similar half-holes on the inside diameter of the pulley
(F).
With the two half-holes lined up, the set screw is threaded into the blind hole (F) and will
collapse the tapered bushing and tighten it onto the shaft and sheave.
Demounting
1. Remove the screws (F) from the taper lock bushing.
2. Lubricate the threads of the set screw and the threads of the 3rd half-hole (located
90 degrees from where the set screws were removed).
3. Thread the screw into the hole; turn the screw until the taper lock bushing (B) loos -
ens on the shaft and inside the pulley.
Mounting
Ensure that all contact surfaces are free from dirt, oil, and other contaminants.
1. Place taper lock bushing into the pulley, lining up the half-holes in both and the
shaft key with the key in the taper lock bushing. Place them onto the shaft.
2. Lightly thread the set screws into the holes.
3. With the pulley seated on the shaft, take a small hammer and a socket that fits
inside the outside diameter of the bushing and seat the bushing into the pulley.
4. Use Allen wrench to tighten the set screws evenly; alternate tapping the bushing
until the set screws are fully tightened.
CHAIN DRIVE (FIGURE 2)
Chain drives are relatively robust and reliable even under unfavourable operating condi -
tions. Incorrect mounting and insufficient lubrication or maintenance will cause premature
wear of the chain and the chain wheels. Careful fitting of the chain drives and appropriate
maintenance contribute to a long service life.
In order to check the chain condition, unscrew screws (A) and remove the cover (B) from
the traction drive brackets as shown.
Fitting Sprockets
Chain sprockets must be aligned. In order to achieve this, both the shafts and chain
sprockets must be parallel and dimensioned according to the load. Check the mounting
precision by putting a ruler to the chain wheels.This has to be done several times with
different chain wheel positions. Incorrect mounting makes the internal chain link plates
press against the external link plates and accelerates the chain wear or causes the chain
wheels to lock up.
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WARNING: REMOVE THE CHAIN GUARD ONLY WHEN THE DRIVE MOTOR IS
AT A STANDSTILL AND THE MACHINE IS IN THE SAFETY OFF POSITION.
FIG. 1
FIG. 2