Ideas at Work/Pond pump O&M manual/Rev 1/ Mar 08/Eng
Page 11 of 17
Changing the rope and pistons
This section covers 1) changing a rope that is worn and 2) removing a rope that has broken
and fallen down inside the riser or return pipes.
Changing a rope that is worn
Prepare a new length of 5mm diameter rope in advance – around 30m should be long
enough
1. Take the wheel cover off by removing the
four nuts and bolts at each corner (1).
2. Turn the handle until the knot can be seen
at the top of the wheel. Untie the knot then
tie the end that comes out of the riser pipe
to the front cover frame (2) to stop it from
falling back down the pipe.: Tie on a new
piece of rope (3) on to the end that leads
down into the return pipe.
If a set of new pistons are to be fitted then
these can be added to the new rope now.
If this is done pull the new rope through
and follow instructions from step 6 below,
check that the pistons are facing the right
way.
3. If the pistons are still in good condition
these can be used again. Simply remove
them from the old rope one at a time and
tie these on to a new piece of rope as
shown below.
If new pistons are needed these can be
added to the new rope.
4. Tie the old pistons on with two knots, one
above and one below the piston. The
pistons should be placed 1m distance
apart from the next piston.
Make sure all the pistons face the same
way.
1
3
2
1m
4 new rope with old piston
