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■CHECKING THE FORKS
(1) Using Color Check, check the upper and lower hangers of the forks for cracks at the welds. Check the
forks for squareness. Check the root of the hangers for damage. In addition, install the forks on the
ngerbarandcheckthetipsofbothforksforalignment.Checkthattheforkstoppersworkproperly.
(2) If the hangers have cracks at the welds, repair completely by welding. Replace any defective fork
stopper with a new one.
(3) If the forks have poor squareness or their lengths are not the same, repair using a press. If the defect is
too severe, replace the forks with new ones.
Note: Under any circumstance, do not heat the forks for the purpose of repairing them. If the forks are
heated and then cooled, the characteristics of the material will change.
■CHECKING INNER AND OUTER MASTS
(1) Check the inner and outer masts for bends and roller sliding areas of the masts for wear. If defective,
repair or replace.
(2) Visually check the inner mast connecting members for cracked welds. If defective, replace the
connecting member. Check also the inner mast for deformation or warping.
(3) Measure the inner width of each of the inner and outer masts along which the end roller rolls, and
calculate the distortion of the masts from the measured values. If the distortion is small, repair using a
press. If severely distorted, the mast assembly should be replaced with a new one.
(4) Check the end rollers of the inner and outer masts for wear of their outer periphery. Replace any
severely worn end roller with a new one. Check their bearings for wear, too.
(5) Check the outer mast support for cracks of the weld or wear and deformation of the bushing, replacing
any defective part with a new one.
■CHECKING THE CARRIAGE
(1) Check the carriage end rollers for uneven wear or damage. If any defect is found, replace the roller
assembly as a complete roller assembly.
(2) Check the bearing of each end roller. If it shows undue wear or damage, replace as a complete roller
assembly.
(3) Check the side rollers for uneven wear or damage in their periphery. In addition, check for looseness
between the bearing and shaft. If any defect is found, replace as a complete side roller assembly.
(4) Check the carriage for bends and squareness.