Fatigue Technology Inc.
401 Andover Park East
Seattle, WA • USA 98188-7605
Tel: (206)246-2010
Fax: (206)244-9886
49050-REV M
11
PROBLEM
CAUSE
SOLUTION
5.3
POWERPAK BUILDS HYDRAULIC PRESSURE BUT CANNOT MAINTAIN PRESSURE
CAUTION:
Operation of the pump motor with it lifted from the reservoir (Step 5.3c) may result in oil spray.
Please shroud the assembly accordingly.
(a) Insufficient volume of air.
(a) Check the air supply. Hoses should be 3/8-inch
inside diameter.
(b) External oil leaks.
(b) Replace leaking pipe fittings. Reseal or replace
any faulty line fittings. If no oil leakage is
visible, the problem may be internal.
(c) Pressure control valve leaks.
(c) To test for a leaking control valve lift the pump
from the reservoir but keep the intake filter in the
oil. Remove the drain line to see if the oil is
leaking from the valve. If the control valve is not
leaking, the internal check valve could be
leaking.
(d) Piston packing or valve seats
are damaged.
(d) Return the pump to FTI for repair.
