Otto Bock 1C62 Triton Harmony Instructions For Use Manual page 29

3. Pull the shaft away from the Base (Fig. 6, Step 2).
4. Pull off the installed Functional Ring (Fig. 6, Step 3).
5. Select the desired Functional Ring (see Section 4.4.1).
6. Preparing the Functional Ring for initial use.
Prior to its first use, Otto Bock recommends that separately ordered Functional Rings should
be pre-compressed with the separately available Pre-compression Tool 4X247 to ensure pro-
per function. Without pre-compression, new Functional Rings can be overly stiff. If using the
preinstalled Functional Ring or an already pre-compressed unit please continue with step 7..
a. Open the Pre-compression Tool.
b. Place the Functional Ring in the Pre-compression Tool (Fig. 9)
c. Completely compress the Functional Ring by tightening the screw completely or clamping
in a vise. (Fig. 10)
d. Compression time: Minimum 3 minutes to a maximum of 15 minutes
e. Open the Pre-compression Tool, remove the Functional Ring.
7. Slide the Functional Ring over the Shaft (Fig. 6, Step 4).
8. Caution - To prevent unintended loosening of the screwing and thus the risk of falling, clean
the threads of the prothetic foot and the retaining screw so that they are clean and free from
grease and other contaminants.
9. Reassemble the prosthetic foot (Fig. 6, Step 5 & 6). Secure the Retaining Screw with Loctite®
243 or 246 and tighten with a 6 mm allen bit in a torque wrench to 15 Nm (133 in-lbs); This
will need to be done by inserting the 6 mm allen socket going through the top hole in pyramid.
10. Insert the foot into the footshell (see Section 4.2.1).
4.5 Monitoring the Elevated Vacuum Environment
To verify that the Harmony® System maintains an elevated vacuum environment, it is necessary to
temporarily install the Vacuum Gauge 755Z37 (available separately from Otto Bock).
1. To do this, remove the vacuum line from the Harmony® P3 Pump's intake valve.
2. Next, attach the vacuum line of the Vacuum Gauge (short side) to the pump's Intake Valve
and connect the loosely hanging Socket Connector to the open barb on the Vacuum Gauge.
3. While the patient is standing and wearing the properly fitting Harmony® System, cycle the
Harmony® P3 Pump to generate a vacuum between 508-847 mbar (15-25 inHg).
4. Stop cycling the pump. If the vacuum is maintained, the system is functioning correctly. If va-
cuum loss does occur, it will be necessary to check the system (see Section 4.5.1).
4.5.1 Troubleshooting the System if Vacuum Loss Occurs
To determine if the vacuum loss exists in Zone 1, 2 or 3 (Fig. 11) install the gauge as described
in section 4.5. Then proceed as follows:
29