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Note: If an
electric door opener
is fitted the operators drive mechanism should be disengaged to allow
manual operation before proceeding
Step 1 -
Secure the door in the open position
a/ OPEN the door by hand
and prop it in the fully open position taking great care as it will be
very heavy.
b/ Remove & discard the old springs, (on most makes of door you'll need
to slacken the tensioning bolt first)
c/ Attach a new pair of
replacement springs and tighten up the spring adjuster bolt (where
applicable) to take up the slack & tension the springs a further 25mm at
this stage.
Step 2 - Lubrication
a./ Oil the pivot points on the balance arms
b./ Oil the pivot bearing shaft of the guide roller wheels
c./ Grease the spring groove in the spring anchor pivot bolts
d./ Grease the contact points on the frame rubbing strip & door
Note:- It is important to lubricate all the
moving parts at least once a year |
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Step
3 - Check for satisfactory door balance
Remove the prop
and close the door to about half way so that the activating arms are
horizontal and carefully let go. If the door has a tendency
to close the door is 'under sprung' and requires more tension on the spring adjusting bolts.
Try to keep the spring tension on both sides of the door equal.
(Note: some door manufacturers don't provide any spring adjustment -
e.g. Garador)
Step 4 - Re-engage the
electric operator
(if fitted) and check for
correct operation
Note: some sophisticated
electric operator models such as the
current Seip TS & TM operator range memorise the force required to
operate the door as part of a safety protection system so if you have
one of these models it may be necessary to follow the operator's
setting-up procedure for re-learning the door characteristics after
spring replacement |
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Note: We recommend horizontally tracked door springs
are replaced in pairs, one each side of the door
(Past
experience has proven that these springs usually fail within a year of
each other so it makes
good sense to replace the pair together as springs can cause a severe
damage when they snap !
In addition, this will reduce the risk of the door pulling to one side
and rubbing against the frame
which can occur due to uneven tension if one new and one old spring are
fitted to the door)
All
work is undertaken at your own risk
If in doubt.
this work should be carried out by an experienced installer
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01384 900 264
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