New Holland CX720 Repair Manual page 66

DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM
Stack valve - Remove (A.10.A.18 - F.10.A.10)
1. Open the hydraulic system drain valve (1) and drain
the hydraulic oil into clean suitable containers.
IMPORTANT: Be sure the area around the stack valves is
clean before removing them. Dirt contamination will cause
hydraulic component damage and/or failure. Use caution
while washing to keep electrical components as dry as pos-
sible.
2. Loosen and disconnect the hydraulic line fittings (1)
from the stack valve. Cap and plug all lines and fit-
tings
IMPORTANT: Lines and fittings must be capped and
plugged when disconnected to avoid contamination. Dirt
contamination will cause hydraulic component damage
and/or failure.
3. Disconnect the electrical connectors (1) from the
valve solenoids (2).
NOTE: Mark all electrical connector locations for proper
connection during assembly.
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