Invacare Pronto M91 Service Manual

SECTION 8—WHEELS
Part No. 1125038 85 Pronto
®
M91™and M94™
Removing/Installing the Drive Wheel Hub
NOTE:Forthisprocedure,refertoFIGURE 8.6onpage86.
Removing
1. Removethedrivewheelfromthewheelchair.RefertoRemoving/InstallingtheDrive
Wheelonpage 84.
2. Removehubandmountinghardware.Performoneofthefollowing:
•AllM91300lbsLimitWheelchairsand400lbsWheelchairsBuiltBefore12/19/03:
i. Folddowntabofexistinglockingtabwasher(Detail“A ” ofFIGURE 8.6).
ii. Removemountingboltandlockingtabwasher(Detail“B”ofFIGURE 8.6).
Discardexistinglockingtabwasher.
iii. Removetheexistingwheelhubandkeystockfromthedriveshaft.
•AllM94Wheelchairsand400lbsM91Wheelchairsbuiltafter12/19/03‐Remove
locknut,washer,keystockandexistingdrivewheelhubfromthedriveshaft.
Installing
CAUTION
DO NOT apply more than a 1-inch (in length) thin film of anti-seize compound to
the drive shaft. Applying more than 1-inch (in length) can cause the anti-seize com-
pound to leak resulting in damage to flooring (carpet, tile, etc.).
1. Applyathinfilmofanti‐seizecompound1‐inchinlengthtotheendofthedriveshaft.
2. Reinstalldrivewheelhubontothedriveshaftandspinthedrivewheelhubtoevenly
distributetheanti‐seizecompoundovertheentiredriveshaft.
3. Removedrivewheelhubfrom
driveshaft.
4. Positionthekeystockonthedriveshaftofthemotor/gearboxassembly.
5. Reinstalldrivewheelhubontothedriveshaftofthemotor/gearboxassembly.
6. Tosecurethewheelhubtothedriveshaft,performoneofthefollowing:
•AllM91300lbsWheelchairsand400lbsWheelchairsBuiltBefore12/19/03:
 WARNING
Failure to properly install locking tab washer can result in wheel separation and
potential user injury or property damage. When replacing wheels always use a new
locking tab washer. DO NOT reuse locking tab washers.
i. ThelockingtabofthelockingtabwasherMUSTbeinsertedintothehubcutout
(Detail“B”ofFIGURE 8.6).

Invacare Pronto M91 Specifications

Power and Performance

maximum speed	6.5 mph / 4.5 mph
incline capability	9˚
weight capacity	300 lb. (400 lb. option)

Wheel and Caster Sizes

front casters	6" x 2"
drive wheels	14" x 3"
rear casters	6" x 2"

Weight and Dimensions

length with footboard up	39"
length with footboard down	40" - 42"
width excluding joystick	25.9"
height	37" - 48"
seat width	18" - 22"
seat depth	16" - 20"
overall height	37" - 40"
back height	18"
seat-to-floor height	21" - 23"
weight with batteries	273 lb.
weight without batteries	199 lb.
wheelchair mass	275 lb.
turning radius front	19.5"
turning radius rear	21.5"
ground clearance	3.25"