Invacare DLX Owner's Operating And Maintenance Manual page 19

REMOVING OR REPLACING
ARMREST (FIGURE 2)
WARNING
Make sure the armrest is securely locked BEFORE
using the wheelchair.
FIGURE 2 - REMOVING OR REPLACING ARMREST
USING OR REPLACING FLIP-BACK
ARMREST (FIGURE 3)
WARNING
DO NOT operate or replace flip-back armrest
when wheelchair is folded - otherwise injury
or damage may result.
Using
Replacing
FIGURE 3 - USING OR REPLACING FLIP-BACK ARMREST