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41
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XI
. MAINTENANCE
!
WARNING
F. PNEUMATIC TIRES
1. DO NOT use this power wheelchair if any of the tires
are under- or over-inflated.
2. Low pressure in a tire may cause the power wheelchair
to veer to one side and result in loss of control.
3. An over-inflated tire may burst.
4. NEVER use a gas station pump to inflate a tire. Such
pumps provide air at high volume, and may cause tire
to burst.
5. Check weekly for signs of wear and correct air
pressure in pneu matic tires.
6. For best performance, inflate tires at a maximum
pressure level, as shown on the tire sidewall.
1
1
CAUTION
To prevent tire damage:
Use a hand pump (or a low volume air pump) to inflate
tires. Use a tire gauge to check pressure.
!
WARNING
G. TO REPAIR OR REPLACE A TIRE
Residual air pressure in tires can cause severe injury. Make
sure you release all air in tire before attempting to service
or repair tires.
1. 6” (135 mm) caster wheels:
a) Remove caster wheel from fork using a
½” (12 mm) wrench.
b) Remove four bolts from rim using a # 3 Phillips
screwdriver. Separate two halves of rim.
c) Replace tire.
d) Reassemble the caster wheel making sure the
bearing spacer is in place and all four bolts
are well tightened.
e) Mount caster wheel onto fork. Install washers
correctly, and tighten bolts.
2. 14” and 12.5” drive wheels:
a) Elevate and securely support power wheelchair
so that wheel is off the ground.
Release all air
from tire.
b) Remove four (4) lug nuts from rim using a
5
/
8
” socket wrench.
c)
Make sure all air has been removed from tire.
Remove the eight bolts inside the rim with a
5 mm Allen key. Separate two halves of rim.
d) Repair or replace inner tube.
Reassemble the wheel.
e) Inflate tire to proper pressure level
(Shown on tire sidewall).
XI
. MAINTENANCE
u
H. HOW TO CHANGE CASTER FORKS
1. With flat head screwdriver, gently remove dust cover.
2. Using a ¾” socket, remove top nylon lock nut.
3. Remove all parts and pull fork downwards.
NOTE
- Be sure to remove all residue before reinstalling parts.
It is strongly recommended to replace all parts at the same time.
NEVER use any kind of lubricant or grease in the fork housing.
4. Reinstall parts.
NOTE
- It is important to ensure that the two Igus tension
washers are installed back-to-back as shown in the illustration
below. Only this configuration provides the proper pressure on
the fork stem.
5. Tighten nylon lock nut.
6. Replace dust cover.
Dust cover
Top nylon lock nut
Steel washer
Igus tension washers
Igus bushing
Bearing
Fork
I. MAINTENANCE CHART
Ensure that all items on the list below are performed
according to frequency indicated. If any of the items
are loose, worn, bent or distorted, im mediately have
them checked and/or repaired by your authorized
SUNRISE MEDICAL
supplier. Frequent maintenance
and servicing will improve performance, extend power
wheelchair life, and help prevent injuries.
FREQUENCY
Daily
Weekly
Monthly
Quarterly
Annually
Charge batteries
X
X*
Check tires for proper
inflation level and wear
X
Check plugs and
connectors for
proper connections
X
Check all moving parts
for wear
X
Inspect all nuts, bolts
and fasteners for
looseness or wear
X
Inspect upholstery
for wear
X
Inspect bearings,
pivot points and bushings
X
Service by
authorized supplier
X
*If stored
J. ORDERING PARTS
When you order parts, provide the following:
1. Model of power wheelchair,
2. Serial number,
3. Left hand or right hand control,
4. Part number, description and quantity of parts you need,
5. State reason for replace ment,
6. User weight and height.
