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Mast Chain Visual Inspection Section 5 – Procedures
4. Inspect rollers for uneven movement, rollers out
of alignment, uneven gaps on either side of the
rollers and excessive wear or gouging on the
mast, brackets or rollers. Replace brackets and
rollers if damaged.
5. Mark each roller with an indelible marker. While
slowly raising the mast observe and ensure the
rollers rotate freely.
6. Fully retract the mast.
7. Install the mast cover at the top.
Figure 13 Mast Top Cover Installation.
8. Exit the work platform.
NOTE
When rollers are replaced for any reason, perform
a full inspection on the chain for damage as
described in section 5.11-1 Chain Thorough
examination
5.11 Mast Chain Visual
Inspection
NOTE
When inspecting chains, wipe off any grease
or dirt as required to allow for proper visual
inspection of the chain. When inspection is
complete and the chain has been determined to
be in good condition lubricate the chain as per
5.9-3 Chains and rollers lubrication
1. Using the base controls, fully retract the mast.
2. Turn main disconnect switch to off position.
3. Remove top mast cover.
4. Using non-specialized equipment (flashlight,
mirror) inspect all surfaces of visible sections
of chain, including anchor points, for broken,
cracked, corroded or worn links (Refer to
5.11-2 Condition inspection table for examples).
Replace the chain if required.
WARNING
Crushing/entrapment hazard due to moving
chains/rollers and mast components. Keep all
hands, other body parts and clothing away from
moving parts.
5. Turn on the Main Power Disconnect and pull out
both e-stops.
6. Re-enter the platform
7. While observing the roller movement, slowly lift
the platform using the platform controls.
8. If there is any uneven roller movement, or stiff
roller movement, refer to roller inspection and
maintenance section.
9. Stop lifting when 6 to 8 inches have traveled
over the top roller.
10. Push the E-stop on the platform.
11. Keeping hands clear of the rollers and chains,
use a flashlight to inspect the newly exposed
chain links for broken, cracked, corroded or
worn links, with particular attention to wear on
the links that have traveled over the rollers.
IIf during any of the inspections outlined above, a
chain shows any signs of degradation, perform a
thorough chain examination as per 5.11-1 Chain
Thorough examination as well as mast roller
inspection as per 5.10-1 Roller Operation Inspection.
If there is any reason to suspect a chain of damage,
or if the mast is apart for other repairs then a thorough
chain examination or replacement is recommended.
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