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6.1.3. Accessing the Top Works Assembly
The loading mechanism for the SS-414 can be accessed from the top of the regulator. Ensure
the spring is de-compressed by rotating the Adjusting Screw fully anti-clockwise and follow
the instructions below:
To access the Top Works Assembly:
i.
Remove the securing M3 Grub Screw (3) from the regulator Body (29).
ii.
Unscrew the Pan Screw (2) and remove the Name Plate (23) from the Locking Cap
(25).
iii.
Loosen the 3x M6 Grub Screws (4) and the 2x M6 Grub Screws (5) in the Locking
Cap (25) and lift the locking cap from the assembly.
iv.
With the regulator secured up-right in a vice, remove the Bonnet (27) by using a
torque wrench or equivalent with 47mm open end.
*NOTE: Soft vice jaws must be used, when securing the body within the vice
against flats. Due to the position of the flats it may be necessary to angle the body
in the vice with the bottom nut upright for access.
v.
Un-screw and lift the top works from the assembly, inclusive of the Bonnet (27),
Load Spring (36), adjusting mechanism (1,7,9,10,24,28) from the body.
vi.
Screw the Adjusting Screw (28), down into the Bonnet (27) to help push out the
remaining adjusting mechanism (1,9,10,24).
vii.
The Adjusting Screw (28) can be removed by un-screwing anticlockwise until
released from the Bonnet (27).
viii.
Remove/r
eplace the ‘O’ rings (7)
from around the Adjusting Screw (28) as required,
prior to reassembly, ensuring adequate lubrication is used.
ix.
Lift the load spring (24), upper spring rest (29) and ball bearing (28) from the
assembly.
x.
Remove/replace the ‘O’ ring (9) from around the lower spring rest (24), prior to
reassembly, ensuring adequate lubrication is used.
xi.
Remove/replace the ‘O’ rings (10) from a
round the Bonnet (27), prior to
reassembly, ensuring adequate lubrication is used.
xii.
Screw the Adjusting Screw (28) into the Bonnet (27) until each of the ‘O’ rings (7)
have entered the bore and are no longer visible.
xiii.
Place the Load Spring (36) onto the Lower Spring Rest (24), then locate the upper
spring rest (29) and ball bearing (28), onto the top of the Load Spring and place the
full assembly into the Bonnet (27).
xiv.
Screw the top works assembly, inclusive of the Bonnet (27), Load Spring (36),
adjusting mechanism (1,7,9,10,24,28) into the regulator Body (29) and using a
torque wrench, tighten to 120Nm.
xv.
Tighten the securing M3 Grub Screw (3) against the Bonnet (27).
xvi.
The Locking Cap (25) can now be secured on to the Adjusting Screw (28) using the
2x M6 Grub Screws (5).
xvii.
The Name Plate (23) can then be secured using the Pan Screw (2).
The regulator is ready to be set. When the desired outlet pressure has been set, use the
3x M5 Grub Screws (4) to secure the Locking Cap (25) to prevent further adjustment.
It is recommended that all parts in the repair kits are used. Any defect parts removed during
the service should be disposed of.
