2mrrxV.jpg, image 4. The feed line from the secondary filter to the ip housing
the banjo fitting mounting to the inner or back side of the ip, remove fastener
with 17mm wrench do not lose both soft washers on either side of banjo fitting.
once free from fuel line, steady with 17mm use 14mm to remove spring and ball
from hollow bolt, stretch small spring slightly to 27mm reinstall tighten and reassemble (stretching allows for a smoother more consistent fuel supply to the ip
allowing smoother idling) the spring being ancient will lose its tension over time
so consider greazzers replacement option.

best of luck.