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Frame
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Hydraulic grips manifold
For frames equipped with G7-style crossheads, a hydraulic grips manifold is provided. The hydraulic grips
manifold is located in the base of the frame. The hydraulic grips manifold contains the solenoid valves for
operator control of the grip assemblies, a pressure gauge and a pressure relief valve. The pressure gauge
indicates the pressure to the grip assemblies. The pressure relief valve is set at the factory and should
not require further adjustment. Any adjustments should only be made by an Instron service engineer.
Procedures for operation of the hydraulic grips is provided in the System Operating Instructions (supplied
separately)
Speed control manifolds
For frames equipped with G7-style crossheads, two speed control manifolds are provided for the in-head
grip assemblies. A speed control manifold is located on the rear of each crosshead. Each manifold
includes two flow control valves that control the opening and closing speed of the grip jaws in the
hydraulic grip assemblies (see “Clamping Speed” on page 33).
Pressure settings
All relief valves, reducing valves, pressure switches, etc. are set at the factory to their proper operating
pressure. They should not need further adjustment. If you feel adjustment is necessary, contact your
local Instron Services department as directed on page 13. Any adjustments should only be made by an
Instron service engineer.
Oil cooling
An air-over-oil heat exchanger and fan (6, Figure 17) are used to cool the oil and exhaust the warm air
from the console. The fan is mounted to the rear cover and has a guarded vent hole.
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