Enerpac HydraMax HM01, Инструкция

Страница: 12 / 38

10
© 2019 Enerpac, All Rights Reserved.
5. If no leaks are found, continue pressurizing
the tensioners to the calculated value
determined in step 3. Continually observe
the tensioner stroke and hydraulic pressure
at all times during pressurization.
6. When the calculated hydraulic pressure is
reached, stop the pump. Recheck the oil
pressure gauge after pump has stopped.
Be sure the pressure is stable (not
increasing or decreasing). Threads may
be visible between the nut and the joint
surface at each tensioner. See Figure 7.
0
FIGURE 10, PRESSURE RELEASED AFTER
TURNING DOWN NUT
0
FIGURE 11, TURNING DOWN THE THREADED
PULLER (AS REQUIRED)
7. While holding the pressure constant, use
a tommy bar to turn down the first socket
and nut by hand. Continue tightening until
the nut is firmly seated against the joint
surface. See figures 8 and 9.
8. Repeat step 7 for all remaining studs in the
circuit.
9. Release the hydraulic pressure by
SLOWLY opening the pump pressure
release (return to tank) valve. Verify that
the oil pressure gauge indicates zero (0)
psi/bar. See Figure 10.
10. Check the stroke indicator. If necessary,
turn down the threaded puller until the
piston is fully retracted into the tensioner
body. See Figure 11.
11. Repeat steps 4 through 10 a second time.
12. Repeat steps 4 through 10 a third time.
13.
As an optional check, apply hydraulic
pressure a fourth time and attempt to
tighten the nuts again.
• If the nuts cannot be turned, then
tensioning is complete. Relieve hydraulic
pressure. Go to Step 14.
• If the nuts can still be turned, repeat
steps 4 through 10 until no additional
movement can be obtained. However,
caution must be observed as excessive
movement may indicate that a joint
problem exists.
14. Verify that the oil pressure gauge indicates
zero (0) psi/bar. If any pressure is indicated,
release the hydraulic pressure by SLOWLY
opening the pump pressure release (return
to tank) valve.
15. Turn down the threaded pullers until the
pistons are fully retracted. Disconnect
hydraulic hoses and install a dust cap (not
shown) over each disconnected coupler.
Remove tensioners from the studs.
7.2 Tensioning Instructions - 50% Coverage
(tensioner installed on every other stud)
IMPORTANT: Read precautions and
instructions at beginning of Section 7.0 before
beginning the following steps. Also refer to
safety information contained in sections 2.1.
1. Ensure that the joint is correctly aligned.
PRESSURE
RELEASE
OPEN
PRESSURE
RELEASE
OPEN