New Holland T4.75F Operator's Manual page 104

Auxiliary control valve levers for models
with mechanically controlled hydraulic lift
Control levers (1) and (2) have two positions, as well as
the central neutral position:
• forward = down;
• back = up.
The control lever (3) can be in two positions, excluding
the central neutral position:
• to the right = lowering
• to the left = lifting
Auxiliary control valve levers for models
with electronically controlled hydraulic lift
Control levers (1), (2) and (3) have two positions, as well
as the central rest position:
• forward = down;
• back = up.
Distributors with automatic release
When operated, the lever is held in position by a me-
chanical catch that enables having the implement make
the required movement without it being necessary to hold
the lever on that working position manually. In this way it
is possible to perform other operations with both hands.
When the pressure set in the hydraulic system is reached,
the control lever is automatically released from the me-
chanical catch and returns to the neutral position.
Control valves with float setting
The tractor can be fitted with float setting valves for imple-
ments that require this function. To select the float setting,
push the relevant valve lever fully forward, past the first
detent, and then push fully forward. A catch will keep the
lever hooked in the float position. To release the control
lever from the float setting, pull upward to return it to the
neutral position.
6 - WORKING OPERATIONS
NOTE: Each control lever is provided with a coloured
plastic plug that enables identifying the coupling to which
it is connected (with a plastic plug of the same colour).
NOTICE: Leaks of pressurized hydraulic fluid can pene-
trate the skin and cause severe injuries:
- Never use hands to locate a leak,
use cardboard or paper.
- Switch off the engine and discharge the pressure before
connecting or disconnecting pressurised lines.
- Tighten all connectors before starting the engine or pres-
surising the hydraulic system. If fluid penetrates the skin,
seek medical assistance immediately to prevent serious
injury
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