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Automatic
mechanical shut-off
Refer to manual 404758 for automatic
mechanical shut-off
Safety unloader valve
Safety unloader valve (25) († Fig. IPB 1,
page 12 and Fig. IPB 2, page 13) is not
serviceable Replace if malfunction is
apparent Upon reassembly, tighten to
10 ft-lbf (13,5 Nm)
Safety unloader valve (25) is set to open at
3 750 to 4 250 psi (258 to 293 bar) lubricant
pressure If pressure switch fails to operate
and shut off hydraulic supply to pump, safety
unloader will open at approximately
4 000 psi (275 bar) to relieve lubricant
supply line pressure (safety unloader is
preset and not adjustable)
Bare pump assembly
Refer to manual 404517 for bare pump
assembly (17)
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