4. Maintenance and Inspection
38
4.4.1 Check Condition and Dirt of Lubricant
Visually inspect the interior of the equipment. Check whether dust or other foreign matter has gotten
inside and check the lubrication state.
The lubrication may have turned brown. This is not a problem as long as the travel surfaces shine as
though they are wet.
If the grease is mixed with dust and does not have a shiny appearance, or if the grease has lost its
efficacy due to prolonged use, then clean each section and reapply grease.
The procedure for internal inspections is outlined below.
1) Remove the attachment screws (at arrows) on the side cover to detach the side cover on one
side.
For some stroke patterns, there is another attachment screw on the side cover between two
screws on right and left ends.
Make sure to remove them all.
2) Check inside.
3) After inspection is finished, put the parts back on in the back order.
Hitting to the edge of the stainless steel sheet while attaching the side cover may cause damage
or winding on the sheet, which could lead to earlier degradation or abrasion.
Therefore, to avoid a touch to the sheet edge, insert a shim (approx. 0.1 to 0.2mm) between the
sheet and cover to put the sheet up when pushing in the cover.
Also, make sure to follow the notice of caution when attaching side covers described in the next
page when side covers are attached.
When attaching the side covers, tighten the screws with the tightening torque described below.
Type
Bolt Diameter
Tightening Torque
M2.6 hex socket head cap screw
45.8N•cm
BA4/BA4U
M3 cross recessed pan head machine screw
41.4N•cm
M3 hex socket head cap screw
83.0N•cm
BA6/BA6U
BA7/BA7U
M3 cross recessed pan head machine screw
41.4N•cm
Caution: Pay attention not to have the stainless steel sheet bent forcefully or damaged when
checking inside.
Do not attempt to pull the sheet to avoid a change of the attachment condition from
the initial.
If the condition of attachment changes, it may impact the sheet position misalignment
or its life. In such cases, contact the sales technical department in IAI.
Also, there is a risk of getting hurt on the edge of the stainless sheet. Make sure to
have a safety countermeasure such as wearing gloves while working on.