JAS GL Knee Extension Assembly Instructions Download Page 2

It is best to carry out your JAS GL Knee Extension sessions in a seated position, 
with a foot rest under your calf for support and comfort.  If you choose to do 
so lying down, place padded support (pillow, towel roll, etc) under your calf 
and ankle during use.

KNEE EXTENSION

FITTING INSTRUCTIONS

CHOOSING & ADJUSTING PULL-PIN SETTING

•  There are five pull-pin settings, which allow the GL Knee 

to move through five arcs of motion.

  1 moves from 48º flexion to 14º flexion.
  2 moves from 38º flexion to 4º flexion.
  3 moves from 22º flexion to 12º hyperextension.
  4 moves from 10º flexion to 24º hyperextension.
  5 moves from 4º hyperextension to 38º hyperextension.
•  Before fitting device, choose the setting that is closest to 

your comfortable end range of knee extension.

 

NOTE:

 

Most patients will begin therapy in setting 1 or 2.

•  Support leg with a foot stool or other means.
•  Place device under leg, with d-rings located on inner side 

of thigh.

•  Slide device up so that your entire thigh and buttock rest 

on thigh cuff.

•  Adjust position of device so that the gear box is centered 

directly under knee joint.

•  Feed thigh and calf cuff straps through d-rings, pull back 

until cuffing is comfortably snug and secure.

•  Begin treatment session by rotating therapy knob, following 

protocol outlined on back of page.

STEP 1:
INITIAL SET-UP

STEP 2:
PLACE DEVICE UNDER THIGH AND CALF

STEP 3:
SECURE THIGH AND CALF CUFF STRAPS

ADJUSTING PULL-PIN SETTING IF DEVICE REACHES 
MOTION LIMIT

•  Remove device from leg.
•  Remove the pull-pin.

•  Slide the device apart until the next hole on Calf 

Assembly aligns with the hole on Thigh Assembly. Re-
insert pull-pin.

Rev 02/14

Therapy Knob

Anterior Cuff

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