Replacing Steering Head Bearings On Castors - Invacare Stream Service Manual

Invacare® Stream

6.6.2 Replacing Steering Head Bearings on Castors

CAUTION!
Risk of Crushing to Hands and Feet by Weight of Mobility Device
– Pay attention to hand and feet.
– Use proper lifting techniques.
CAUTION!
Risk of Uncontrolled Movement of Mobility Device
– Turn off power supply (ON/OFF key).
– Engage drive.
– Before raising mobility device, secure wheels by blocking them with wedges.
– Prevent the mobility device tipping by propping it up on a wooden block which is long and wide enough under
the battery case. If the wooden block is too short or too high, the mobility device can still tip.
• 19 mm socket wrench
• Torque wrench
• Large screwdriver, flat
• Oblong wooden block (at least 14 cm x 14 cm x 30 cm)
• Parallel pin punches (6/8)
• Hammer (300 g - 500 g)
Removing:
1.
Use wooden block (1) to prop up mobility device on side on which ball bearings are to be replaced.
2.
Carefully remove the plastic cap (1) using the large screwdriver.
3. Use socket wrench to loosen and remove nut. Hold the wheel in such a way that it is not able to rotate when nut
is removed.
4.
Pull steering head shaft downward and out of steering head tube.
5. Remove shim and ball race from head of tube. The other ball race should be on shaft.
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Fig. 6-3
Fig. 6-4
Fig. 6-5
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