Fatigue Technology Inc.
401 Andover Park East
Seattle, WA • USA 98188-7605
Tel: (206)246-2010
Fax: (206)244-9886
49050-REV M
13
5.6 PULLER RETRACTS ON FIRST TRIGGER ACTUATION, BUT WILL NOT RETURN TO
START POSITION.
(a) The new puller unit requires
lubrication through the piston
and cylinder.
(a) Cycle the trigger several times to introduce
hydraulic fluid to the cylinder. If piston fails to
return, proceed to 5.6 (b).
(b) The hydraulic quick coupler
has not been completely
tightened at the PowerPak
manifold. This allows the
check valve in the puller
unit’s hydraulic quick coupler
to close on the return stroke.
(b)
1)
Disconnect the air supply from the FT-20.
2)
Disconnect the coupler from the FT-20.
3)
Connect Enerpac CT-604 to the coupler
and bleed off hydraulic oil to relieve the
build-up. Figure 5.6-1 shows the Enerpac
CT-604 Pressure Relief Tool.
4)
Once pressure is relieved, the coupler may
be tightened and reinstalled onto the
PowerPak.
5)
Reattach the air lines to get the puller unit
to return.
6)
Check the oil level in the PowerPak
reservoir.
5.7 POWERPAK WILL NOT STOP OPERATING WHEN TRIGGER IS RELEASED.
(a) Puller unit retracts and will
not return because hydraulic
pump will not shut off, or
there is a delay in PowerPak
shutoff.
(a) Trigger response valve is not properly adjusted.
See 5.1 (a).
(b) Air logic control valve is
stuck in position.
(b) See 5.1 (b).
Figure 5.6-1
Enerpac CT-604 Pressure Relief Tool
