Fatigue Technology Inc.
401 Andover Park East
Seattle, WA • USA 98188-7605
Tel: (206)246-2010
Fax: (206)244-9886
57429 – Rev L
11
PROBLEM
CAUSE
SOLUTION
2. Puller retracts on first trigger
actuation but will not return to
start position. The hydraulic
hose is difficult to bend or coil
(indicating unrelieved pressure
built up in the hose).
(a)
The hydraulic quick coupler
line has not been completely
tightened at the PowerPak
manifold (there should be no
space between the PowerPak
coupler and the hose fitting
flange). See Figure 5.0-3.
(a) Once hydraulic pressure has
been introduced to the
hydraulic hose, the pressure
must be relieved before the
coupler can be sufficiently
tightened.
Figure 5.0-3
Hydraulic Quick Coupler
Puller Unit
Hydraulic Hose
Couplers
Procedure for relieving
hydraulic pressure:
(1) Disconnect the main air
supply.
(2) Disconnect coupler from
PowerPak. See Figures
5.0-4 and 5.0-5 for the
locations of the hose
couplers.
(3) Connect Enerpac CT-604
to the coupler and bleed
off hydraulic oil to relieve
the built-up pressure.
Figure 5.0-6 shows the
Enerpac CT-604 Pressure
Relief Tool.
(4) Once pressure is relieved,
coupler may be tightened
and reinstalled onto
PowerPak.
(5) Reattach air lines to get
puller to return.
(6) Check oil level in
PowerPak Reservoir.
Figure 5.0-4
Location of Hydraulic Quick Coupler (FT-200)
Hydraulic Quick
Coupler
Figure 5.0-5
Location of Hydraulic Quick Coupler (FT-20)
PowerPak Coupler
Hose Fitting Flange
No Space
Hydraulic Quick
Coupler Line
Figure 5.0-6
Enerpac CT-604
Pressure Relief Tool
