8
294000.10040 Rev A
SERVICE & MAINTENANCE
NOTE:
Joerns Healthcare recommends Nyloc nuts should always be replaced if undone.
ALWAYS
torque fasteners to the correct setting.
SUPPORT ARM PIVOT
1
Check the pivot for lateral, vertical and horizontal play that would indicate excessive wear.
Signs of excessive wear must
be investigated.
Play at the pivot point must not exceed 1 mm before replacement.
2a
If the hoist is not fitted with optional weigh scale, remove the two plastic covers from the pivot.
2b
If the hoist is fitted with optional weigh scale, the display can be removed by removing the battery and battery housing from
the display housing and withdrawing the two screws which can be seen when looking through the battery hole - See appendix A .
Take care not to over-stress the cable connecting the display to the loadcell
.
3
Check the Set pin is
tightened to 8 Nm
.
4
Replace the plastic covers, and display if applicable, to the Boom pivot.
REMOVAL OF THE SUPPORT ARM PIVOT
1
To remove the support arm pivot, it is advisable to first remove the two M12 bolts from the end of the arm, this will enable the
pivot to be removed and replaced more easily.
2a
If the hoist is not fitted with optional weigh scale, Remove the grey plastic covers from the top of the boom .The covers are a
push on fit. Remove the covers by gently levering a thin blade or screwdriver between the boom and the covers
2b
If the hoist is fitted with optional weigh scale, the display can be removed by removing the battery and battery housing from
the display housing and withdrawing the two screws which can be seen when looking through the battery hole – See appendix A.
Take care not to over-stress the cable connecting the display to the loadcell
3
Remove the bolts and pull the arm away from the pivot.
4
The arm pivot is held in place with a set pin.
5
Remove the pin.
6
Examine the pin for signs of wear. The diameter of the pin is 12.7mm. Reduction in diameter due to
wear must not exceed
1mm
before replacement.
7
Withdraw the outer sleeve bushing from the arm pivot (if you did not remove the two M12 bolts, hold the boom while doing
this as it may fall forwards).
8
Inspect the sleeve for wear as per the fulcrum pin.
9
Remove the plastic bearing washers (2 off) from the pivot and examine for any wear or damage. Lateral movement at the
pivot is most likely to be because of wear on the washers.
10
Remove and examine the arm pivot and the remaining mast pivot casting, the pivots internal bores and the holes in the mast
in particular for wear or damage.
11
The bore and holes are 20mm in diameter;
wear should not exceed 1mm on diameter
before replacement.
