maintenance
Servicing the Mast Extension Cable System
To replace the cable in the mast extension cable system, use the following steps (See Figure 12):
CENTER | LOWER | LOWER |
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MAST |
| MAST | MAST | ROUTE TO | |
PULLEY | PULLEY | SHACKLE | HAND WINCH | ||
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UPPER | CENTER | LOWER |
MAST | MAST | MAST |
Figure 12. Mast Extension Cable System
1.Lower the mast to the horizontal resting position.
2.Inspect the cable clamps, pulleys, and other components for worn or damaged parts. If either of the cables on the mast needs to be replaced, they should both be replaced at the same time.
3.Disassemble the mast by disconnecting the cables from the mast and sliding the sections apart.The lower cable can be disconnected from the winch.
WARNING
The mast sections are heavy and awkward to handle. Use proper lifting devices and procedures when servicing the mast and its components.
4.There are two pulleys in the mast raise/lower cable system. They should be removed and replaced if worn or damaged. Worn or damaged pulleys can cause premature cable failure.
5.Reassemble the mast extension cable system by connecting the cable to the bottom of the upper mast and sliding the upper mast into the opening of the center mast. Connect the second cable to the bottom of the center mast and slide the center mast into the opening of the lower mast, observing proper lifting techniques.
6.Route the upper mast cable through the center mast pulley and connect the free end of the cable to the lower mast ankle shackle. Route the center mast cable through the lower mast pulley and connect the free end of the cable to the hand winch at the bottom of the lower mast.
7.Raise, extend, retract and lower the mast several times to verify correct operation.
MLT20 SERIES LIGHT TOWER • operation manual — rev. #0 (01/18/13) — page 23
