Manitowoc 3900W - Checking Charge Pump Belts; Draining and Refilling Converter Oil System

Checking Charge Pump Belts (see Figure 9)
Keep the charge pump belts tight enough so they do not
slip. A belt that slips could be the cause for low charge
pressure.
1. The best tension for a V-belt is the lowest tension at
which the belt will not slip under the highest load
condition.
2. Too much tension shortens belt and bearing life.
3. Check the tension of a new belt frequently.
4. Keep the belt and pulley free of foreign material.
5. If the belt slips, tighten it.
To Tighten
Charge Pump
Belts
Figure 9 Charge Pump Belts
Non;-Conlroiie~'Converters
Draining and Refilling Converter Oil System
NOTE Non-controlled converters DO NOT require the
oil to be changed. Keeping the filters clean is all
that is required for the system.
1. Open the drain valve at each turbine housing (Figure
I0).
2. Open the drain valve at each heat exchanger (Figure
I0).
Figure 10 Converter and Heat Exchanger Drain Valves
(Continued)
FOLIO 941-7
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