(d)
Slide the O-ring (or the square seal or the back-up ring) onto the sleeve (1) until it touches the conical end of the sleeve.
(e)
Slide the pusher (2) onto the sleeve (1) until it touches the O-ring (or the square seal or the back-up ring).
(f)
Push the pusher until the O-ring (or the square seal or the back-up ring) is in the correct position in the groove of the bobbin.
(g)
Make sure that the O-ring (or the square seal or the back-up ring) is in the correct position without any torsion or damage.
(h) Remove the tool. Subtask 20-23-21-911-054
E. Installation of the Bobbins in their Housings
(Ref. Fig. 202/TASK 20-23-21-991-002)
(1) Installation of bobbins (from 1/4" dia to 1/2" dia)
(a)
Make sure that bobbin is clean.
(b)
Get the installation tool applicable to the diameter of the bobbin that you install.
(c)
Make sure that the tool is correctly set:
-34 mm (1.3385 in.) for bobbin from 1/4" dia to 3/8" dia,
-40 mm (1.5748 in.) for bobbin of 1/2" dia.
(d)
Put the compression bushing (1) of the tool into the bobbin that you install.
(e)
Hold the nut (3) of the tool and turn the body (2) until the bobbin is locked on the tool.
(f)
Lightly apply COMMON GREASE (Material No. 04-015) or HYDRAULIC FLUIDS (Material No. 02-003) to the seals of the bobbin.
(g)
Align the bobbin with its housing and push on the tool to slide the bobbin into its housing.
NOTE : Make sure that the groove side of the bobbin is installed
____
into the manifold.
(h)
Remove the tool.
(i)
Make sure that the bobbin is correctly installed.
(2) Installation of bobbins (from 5/8" dia to 1" dia)
(a)
Make sure that the bobbin is clean.
(b)
Get the installation tool applicable to the diameter of the bobbin that you install.
(c)
Put the compression bushing (1) of the tool into the bobbin that you install.
(d)
Hold tha body (2) of the tool and turn the nut (3) until the bobbin is locked on the tool.
(e)
Lightly apply COMMON GREASE (Material No. 04-015) or HYDRAULIC FLUIDS (Material No. 02-003) to the seals of the bobbin.
(f)
Align the bobbin with its housing and push on the tool to slide the bobbin into its housing.
NOTE : Make sure that the groove side of the bobbin is installed
____
into the manifold.
(g)
Remove the tool.
(h)
Make sure that the bobbin is correctly installed.
MARKING OF TIGHTENED UNIONS - MAINTENANCE PRACTICES
___________________________________________________
TASK 20-23-22-910-001
Marking of the Unions after Standard or Specific Tightening Torque Application
1. Reason for the Job
__________________
After you tighten an union on a hydraulic or crew oxygen system, you must identify it with a red painted line:
-
this identifies a tightened union
-
this shows possible loosening of the union.
2. Job Set-up Information
______________________
A. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R Material No. 07-020 AI TNA 007-10012 IDENTIFICATION PAINT (Ref. 20-31-00) Material No. 11-003 USA ASTM D 740 METHYL-ETHYL-KETONE (Ref. 20-31-00) Material No. 11-005 TRICHLOROTRIFLUORO ETHANE (Ref. 20-31-00)
Material No. 15-008 AIB TN 10138 TYPE II GRADE 2 CORROSION PREVENTIVE TEMPORARY PROTECTIVE COMPOUND (Ref. 20-31-00)
Material No. 16-003 F ASNB70720 COATING (OBSOLETE USE 16-021) (Ref. 20-31-00) Material No. 16-018 EXTERNAL TOP COAT (POLYURETHANE) (Ref. 20-31-00)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
20-23-22-991-001 Fig. 201
3. Job Set-up__________
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