AGCO New Leader L4258G4, Руководство по обслуживанию мастерской

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Four-bolt split flange
Make sure the sealing surfaces are free of burrs,
damage, and scratches or any unwanted particles.
Lubricate the O-ring. Set the flanges and the half
clamps. Put the lock washers on the bolts and put
the bolts through the half clamps. Hand tighten the
bolts. Tighten the bolts in a cross sequence in
small amounts to the torque amount for the series
of flange.
Fig. 31
Fig. 32
Straight thread fittings
The straight thread hydraulic fittings require accurate tightening. Overtightening of the hydraulic fittings will
damage the sealing surfaces and will require the replacement of the damaged parts.
Correct initial tightening depends on the mating parts to be connected. Continue as follows:
An adapter fitting (37° flare) connected to a double flare tube assembly. Tighten the fitting finger tight and
wrench the fitting 1/2 turn (for single flare, 1/4 turn).
An adapter fitting (37° flare) connected to a hose. Tighten the fitting finger tight and wrench 1/4 turn.
An O-ring adapter fitting connected to a solid port: Tighten the fitting until the backup washer contacts the
face of the boss after aligning the fitting.
Tighten after initial tightening, as in service work: Tighten both the tube and the hose connections finger
tight and wrench 1/4 turn. O-ring fittings must be tightened as for initial assembly.
JIC SWIVEL NUTS (37° SEAT). The maximum recommended torque values for JIC (37° seat) swivel nuts,
either swaged or brazed type, follow. Swivel nuts usually withstand this torque for a minimum of 15
repeated assemblies.
The torque required to seal female swivel fittings or hose couplings to a male connector depends on many
variables. Fluid medium, pressure, surface finish, and so on are some of these variables. Use the following
values only as a guide for the torque maximum values to apply to the fittings.
1. General
New Leader® L4258G4/L4330G4 1-23
79035617A