MAINTENANCE
GTTZ10EJ Maintenance Manual 5-19 © Mar. 2022
Figure 5-15
• Adjust the chain tension of mast section 3to
enable H4=306mm±2mm (12.047in±0.079in)：
alternately tighten or loosen the nuts as shown.
Figure 5-16
5. Start the machine from the ground.
6. Fully raise and lower the mast, perform twice.
7. Check the synchronization of the symmetric motion
and whether abnormal noises sound.
5. Replacement criteria
Replace the chain if any of the following conditions
occur：
• The wear elongation rate of the 12–link chain is 2%
more than the original, i.e., L1＞L+2%L.
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