Fatigue Technology Inc.
401 Andover Park East
Seattle, WA • USA 98188-7605
Tel: (206)246-2010
Fax: (206)244-9886
12
49050-REV M
PROBLEM
CAUSE
SOLUTION
5.4 POWERPAK WILL NOT BUILD FULL HYDRAULIC PRESSURE
(a) Inadequate air pressure or air
flow.
(a) Increase air pressure and/or hose diameter.
(b) Faulty pressure gage.
(b) Calibrate the gage.
(c) External fitting leakage.
(c) Replace the leaking pipe fitting.
(d) Faulty internal pressure
regulator.
(d) Lift the pump from the reservoir but keep the
filter immersed in oil. Note the pressure reading
when the relief valve begins to open. If it is
functioning normally, the pressure should start
to bleed off at 9,500 to 10,000 psi (4,000 psi for
the FT-20-4K).
(e) Internal leakage in puller unit.
(e) Disconnect the puller unit. Use a different
puller unit to test the PowerPak; if it builds to
full pressure using a different puller unit, the
first puller unit is defective. If another puller
unit is unavailable, look for oil leaks and their
locations. Refer to the appropriate puller unit
manual for instructions.
(f) Leaks in the pressure valve.
(f) Clean and reseal or replace the valve.
(g) Piston packing or valve seats
are damaged.
(g) Return the pump to FTI for repair.
5.5 AIR RUSHES OUT AROUND THE TRIGGER OF THE PULLER UNIT WHEN ACTUATED AND
PUMP DOES NOT OPERATE.
NOTE:
Minor air leakage from the trigger is normal.
(a) An air line from the puller unit
is not connected.
(a) Connect the air line.
(b) The trigger response valve is
not properly adjusted.
(b) While squeezing the trigger of the puller unit,
loosen the brass nut on the trigger response
valve. Adjust the valve pilot in or out until the
desired sensitivity is obtained. Retighten the
brass nut.
(c) Hose fittings from the puller
unit or PowerPak are reversed.
(c) Check all hose fitting configurations in the
puller unit manual.
(d) Air logic control valve is stuck
in position.
(d) Refer to 5.1 (b).
PROBLEM
CAUSE
SOLUTION
