To Repair or Replace a Tire | Sunrise Medical S-646 SE guide

46	X I I . M a i n t e n a n c e
E. PNEUMATIC TIRES
1.	Do not use this chair if any of the tires are
	under- or over-inflated.
2.	Low pressure in a tire may cause the chair 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.

1.Check for signs of wear and correct air pressure in pneumatic tires weekly.

2.For best performance, inflate tires to the same pressure level, as shown on the tire sidewall:

•8" pneumatic casters - 30 to 40 psi

•14" pneumatic drive wheels - 35 to 45 psi for knubby tires and 25 psi for V-groove tires.

3.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.

F. 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. 8" Caster Wheels:

a) Release all air from tire.

X I I . M a i n t e n a n c e 47

2.14" Drive Wheels:

a)Elevate and securely support chair so that wheel is off the ground.

b)Release all air from tire.

c)Remove the four lug nuts securing wheel to hub (this is necessary only if tech- nician desires to remove entire wheel assembly– not required).

d)Remove all bolts holding two halves of rim together.

e)Repair or replace inner tube.

f)Reassemble wheel rim.

Use a torque setting of 180 lbs.-in. to re-tighten bolts.

g)Re-secure wheel to hub using four lug nuts.

Use a torque setting of 240 lbs.-in. to re-tighten lug nuts.

h)Inflate tire to proper pressure level (listed on tire sidewall).

It is recommended to operate chair for 10-15 hours and then re-verify installation torque of lug nuts at 240 lbs.-in.

G. MOTOR BRUSHES

You should have your supplier check the motor brushes every four (4) months for wear. The brushes should be clean and shiny. Replace worn or blackened brushes.

H. ORDERING PARTS

When you order parts, provide the following:

1.Model of chair

2.Serial number of chair

3.Left hand or right hand control

4.Part number, description and quantity of parts you need.

5.State reason for replacement.

I. MAINTENANCE CHART

You should check the items on this chart at the indicated intervals. If any of the items are loose, worn, bent or distorted, immediately have them checked and/or repaired by your authorized Sunrise supplier. Frequent maintenance and servicing will improve per- formance, extend wheelchair life, and help prevent injuries.

b)	Remove caster wheel from fork.
c)	Make sure there is no residual air in tire before
	you remove bolts that hold the two rim halves
	together.
d)	Remove four bolts from rim. Separate two
	halves of rim.
e)	Repair or replace inner tube.
f)	Reassemble the caster wheel; makesure the bear-
	ing spacer is in place and all four bolts are secure.

NOTE– Use a torque setting of 240 inch-pounds when tightening bolts.

g)Mount caster wheel onto fork. Install washers correctly.

h)Inflate tire to proper pressure level.

CHECK...

Charge Batteries

Check tires for proper inflation level

Check batteries for proper electrolyte level (wet cell only)

Check plugs and connectors for proper connections

Check all moving parts for wear

Inspect all nuts, bolts and fasteners for looseness or wear

Inspect upholstery for wear

Remove and inspect motor brushes

Servicing by authorized Supplier

Daily Weekly Monthly	Quar	Annually
	terly

✓

930477 Rev. A

X I I . M a i n t e n a n c e

E. PNEUMATIC TIRES

and may cause tire to burst.