maintenance
1.Stop the engine and allow it to cool. Tighten valve of the corrosion resistor (if equipped).
2.Turn water filler cap slowly and remove it.
3.Prepare a container to catch the coolant, then open drain plug of the radiator or heat exchanger and drain plug of the engine, and drain the coolant.
4.After draining the coolant, close drain plugs and fill with tap water.
5.When the water level is near the mouth of the water filler, open drain plugs and start the engine, and run at low idling. Keep the engine running at low idling and flush the radiator for about 10 minutes.
6.Adjust the flow of the water flowing in and draining out to ensure that the radiator is always full during the flushing operation. While flushing water through the system, make sure the water inlet hose does not come out of the radiator filler port.
7.After flushing, stop the engine, open drain plug and drain the water, then close drain plugs.
8.After draining the water, flush the system with a flushing agent. See instructions on flushing agent label.
9.After flushing, open drain plugs and drain out all the water, then close drain plugs and add tap water so the water level is near the mouth of the water filler.
10.When the water level is near the mouth of the water filler, open drain plugs and start the engine, run at low idling and continue to flush the system until clean water comes out. Adjust the flow of the water flowing in and draining out to ensure the radiator is always full during the flushing operation.
11.When clean water comes out, stop the engine, drain all the water, then close drain plugs.
12.Remove the corrosion resistor (if equipped) and open valve.
13.Supply water until it flows over the water filler.
14.Drain the water inside reserve tank, clean the inside of the reserve tank, then fill with coolant/water mixture to between the full and low lines.
15.Stop the engine, wait for 3 minutes, add tap water until the water level reaches near the water filler port, then tighten the radiator cap.
Check Cable Wear
The wire rope (cable) that raises and extends the mast is a very important part of the light tower. There is one cable/ hand winch system, located on the tongue of the trailer, that raises and extends the light tower mast. There is a second cable/hand winch system located on the mast that serves to raise and lower the two extendable sections of the mast.
DANGER
Wire rope (cable) will fail if it is worn, frayed, misused, crushed, kinked or damaged in any way. ALWAYS check the cables and pulleys for any abnormalities before use.
DO NOT use it if there is even the slightest cause for concern and replace any damaged cables or pulleys immediately.
Servicingthe Mast Raise/Lower Cable System:
To replace any components in the mast raise/lower cable system (Figure 29), use the following steps:
VERTICAL 
HAND WINCH
CABLE
CABLE
SHEAVE
Figure 29. Mast Raise/Lower 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.
3.Disconnect the cable from the ball socket pin and remove from the mast pulley and cable sheave. Detach the cable from the hand winch as necessary.
4.Replace the pulley and the cable as needed.
page 40 — LT6D LIGHT TOWER • operation manual — rev. #0 (07/16/13)