Fatigue Technology Inc.
401 Andover Park East
Seattle, WA • USA 98188-7605
Tel: (206)246-2010
Fax: (206)244-9886
8
49050-REV M
4.4
CHANGING THE HYDRAULIC FLUID
1.
After approximately 200 to 500 hours of use, the hydraulic fluid should be changed. The frequency of oil
changes will depend upon the general working conditions, severity of use, overall cleanliness, and care given
the PowerPak.
2.
To drain the FT-20, remove the shroud and cover retainer screws and expose the reservoir. (If a drain plug is
present, unscrew the plug and drain the oil through the port.)
3.
Drain the hydraulic fluid by pouring the oil over and out one corner of the reservoir.
4.
Refill the reservoir with hydraulic fluid. See Section 1.3 for hydraulic fluid specifications.
5.
Replace the pump on the reservoir, torquing the cover plate retaining screws to 25/30 in-lbs. Make sure the
reservoir gasket is in place.
6.
Replace the shroud.
4.5
LUBRICATION AND AIR REQUIREMENTS
1. The air supply must be clean and dry, and provided at 90 to 120 psi. Volume must be a minimum of 20 cfm,
and a 3/8-inch inside diameter air hose is recommended.
2. FTI recommends that an automatic air line filter/oiler be installed in the air inlet line as close to the PowerPak
as possible. Set the oiler to feed 1 to 3 drops of oil per minute (one drop for every 50 to 75 cfm of air) into the
system. Use SAE No. 10 non-detergent oil.
