Loosen the coolant fill plugs that are next to the
fittings for the hydraulic fluid. If coolant flows
from the bottom of the holes for the fill plugs, the
coolant is at the specified level. If coolant does not
flow from the bottom of the hole for the fill plug,
remove the fill plug. Fill the housings until fluid
flows from the bottom of the fill plug holes. Install
the fill plugs. Figure 53