Adjusting The Harmony 4R144 And 4R150 Elastomer Rod Shock Absorber; Adjusting The Air Shock In The 4R133, 4R134, 4R1359 - Ottobock Harmony 4R144 Instrucciones De Uso

5.7 Re-use the original washers on the proximal end of the Harmony 4R133.
5.8 Place provided washers supplied with Harmony 4R133 on both sides of the distal bushings.
5.9 Install the Harmony 4R133 in the foot housing.
5.10 Push the pins through the bushings.
5.11 Reinstall the cap head screws in the pin and tighten with a 4 mm Allen wrench.
5.12 To connect the Vacuum Line to the socket, see section 4.4.
6.0 Adjusting the Harmony 4R144 and 4R150 Elastomer Rod Shock Absorber —
PRACTITIONERS ONLY
The preload on the elastomer rod in these units can be adjusted to accommodate different patient weights. This
function should be adjusted for the patient's normal gait. In order for the vacuum pump to function properly, the
Harmony 4R144 and 4R150 must be adjusted so that the shaft extends completely when unweighted (with no air
pressure in the air chamber), and so that it compresses between 5 and 7 mm when weighted.
To replace the Elastomer Rod:
1. Locate Blue Cup inside shaft (Fig. 8). Screw in completely using a 3/8" (10mm) Allen wrench
2. To set Elastomer Rod tension, release pressure on the Rod by backing out the Blue Cup. See suggested
starting points below. Because the resistance of the elastomer rods can change slightly over time, we
recommend it be readjusted during routine checkups.
4R144 only (Red Elastomer Rod)
Patient Weight (lbs / kgs)
120 lb. / 50kg.
140 lb. / 60 kg.
160 lb. / 70 kg.
180 lb. / 80 kg.
200 lb. / 90 kg.
220 lb. / 100 kg
4R150 only (Yellow Elastomer Rod)
Patient Weight (lbs / kgs)
220 lb. / 100kg.
240 lb. / 110 kg.
260 lb. / 120 kg.
280 lb. / 130 kg.
300 lb. / 140 kg.
320 lb. / 150 kg.
Important: Do not unscrew more than 5 turns, as this may prevent the shaft from extending completely and
compromise the vacuum pump function.
7.0 Adjusting the Air Shock in the 4R133, 4R134, 4R135 — USERS AND PRACTITIONERS
Resistance in the Air Shock can be modified with a hand pump when high-level activities are encountered (Fig. 9).
Please be aware that increased resistance in the Air Shock may limit the travel of the pump piston, requiring more
compression cycles for you to attain the desired elevated vacuum during normal walking.
Note: When adjusting pressure in the Air Shock, we recommend that you begin at 0 psi as a starting point. Please
see section 9.0 for recommended air pressure.
Harmony
# of turns out (counterclockwise) from fully inset position
# of turns out (counterclockwise) from fully inset position
4.5
4.0
3.5
3.0
2.5
2.0
4.5
4.0
3.5
3.0
2.5
2.0
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