Sedgwick SM255t, Инструкция по эксплуатации и обслуживанию, Страница: 26 / 32

SM255t Operation/Maintenance Instructions Page 26 of 32
We recommend that two people remove the rear access panel when it is necessary to do
so. The panel is secured with four allen bolts which are captive on the main stand. After
loosening them the panel can be lifted and taken off and the bolts will remain attached to
the body. To reattach the panel, guide the bolt heads through the holes, let the panel drop
into position and tighten the bolts.
Clean the interior of the machine regularly. A build-up of dust or chips around the motor and
controls can cause motor failure and will impair movement of the rise & fall controls.
When lubricating the control mechanisms first check them for sawdust accumulation. Use a
pitch remover and a wire brush to remove any build-up. Once clean, lubricate moving parts
using a lubricant that does not pick up a lot of sawdust. Powdered graphite, hard wax or
white lithium sprays are ideal. Do not use an oil-based product. These will collect sawdust
and congeal into a gummy substance, making working parts hard to operate. Drive belts will
also deteriorate if they encounter oil.
Arbor and Bearings
The spindle needs very little maintenance, but it should be checked for wear, burrs and any
play in the bearings that the arbor rides in.
First inspect the loose top spindle and arbor threads for dirt, burrs or raised nicks. Slight
imperfections can be carefully removed with a fine-cut file.
The main spindle bearings are sealed for life and require no lubrication. To check their
condition, turn the arbor by hand while feeling for any roughness. Grasp the arbor and gently
push side to side to check for any play. Roughness or slack in the bearings means that they
need to be replaced.
Vee Belt and Pulleys
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The SM255t is driven via one Polyvee Drive Belt 762 J6.
To prevent loss of power and/or belt slip the belt should be correctly tensioned and regularly
checked for wear.
When the belt begins to show signs of wear replace it - a frayed belt will cause vibration.
Excessive belt wear, vibration and noise may be the cause of poorly aligned or loose pulleys.
Check alignment by placing a straight edge across the faces of the two pulleys. If necessary,
adjust the motor pulley by loosening the allen screw locking the pulley onto the shaft. If you
cannot get the pulleys to align it may be because the shafts are not in line. Loosen the motor
mounting bolts and shift the motor until you get the required results. Position the pulley as
near as possible to the motor bearing. If it is set too far along the motor shaft it will put
unnecessary strain on the shaft and bearings.