(6)
Tightening of shoulder screws.
(Ref. Fig. 206/TASK 20-21-11-991-005)
(a)
Tighten by the nut.
(b)
The minimum torque that applied is to between 0.1 and 0.2 m.daN
(8.84 and 17.69 lbf.in). If you do not apply this minimum torque,
the washer can become loose.
If you install a castellated nut, the tightening torque tolerance
does not always let you align the castellated nut with the hole
of the cotter pin.
If you cannot align the castellated nut with the hole of the
cotter pin, install a steel teflon washer NSA5305 and a nut
NSA5060.
R Torque Values for Self Locking Nuts Figure 205/TASK 20-21-11-991-034
1EFF : 1 1 1CES ALL 1 111 20-21-11 Page 212 Nov 01/01
R Tightening Torques for Shoulder Bolts Figure 206/TASK 20-21-11-991-005
R 1EFF : 1 1 1CES ALL 1 111 20-21-11 Page 213 Feb 01/01
TIGHTENING TORQUES FOR PIPES UNIONS (NOT FOR OXYGEN UNIONS)
___________________________________________________________ MAINTENANCE PRACTICES
_____________________
TASK 20-21-12-911-001
Tightening Torques for Pipes Unions (not for OXYGEN unions)
1. Reason for the Job
__________________
R This procedure gives the data related to the tightening torques for the R unions of these systems:
-FUEL
-HYDRAULIC
-AIR DATA
-DE-ICING
-RAIN PROTECTION
-EXTINGUISHING
-PRESSURIZATION
-WATER
-WASTE WATER
-AIR CONDITIONING
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
20-23-11-917-001 Tightening practices for Hydraulic Connections
20-21-12-991-001 Fig. 201
20-21-12-991-002 Fig. 202
20-21-12-991-011 Fig. 203
20-21-12-991-003 Fig. 204
20-21-12-991-004 Fig. 205
20-21-12-991-005 Fig. 206
20-21-12-991-006 Fig. 207
20-21-12-991-007 Fig. 208
20-21-12-991-008 Fig. 209
20-21-12-991-009 Fig. 210
3. Job Set-up
__________
Subtask 20-21-12-941-050
A. Not applicable.
4. Procedure_________
Subtask 20-21-12-911-050
A. Tightening Torques for Hydraulic Systems
NOTE : Before you torque a component, obey the precautions and procedures____ given in the Tightening Practices for Hydraulic Connections procedure (Ref. TASK 20-23-11-917-001).
(1) Tightening torques for AN unions. (Ref. Fig. 201/TASK 20-21-12-991-001)
(2) Tightening torques for flexible hoses
R (a) Steel union installed on steel equipment or tube . (Ref. Fig. 202/TASK 20-21-12-991-002)
R R (b) Aluminum-alloy union installed on aluminum-alloy equipment or tube. (Ref. Fig. 203/TASK 20-21-12-991-011)
R R (c) Union with one of the parts (union or equipment or tube) made of aluminum-alloy. (Ref. Fig. 203/TASK 20-21-12-991-011)
(3) Tightening torques for blanking caps/plugs
R (a) Steel cap/plug installed on a steel component. (Ref. Fig. 204/TASK 20-21-12-991-003)
R (b) Aluminum-alloy cap/plug installed on an aluminum-alloy component. (Ref. Fig. 205/TASK 20-21-12-991-004)
R R R (c) Cap/plug with one of the parts (cap/plug or component) made of aluminum-alloy. (Ref. Fig. 205/TASK 20-21-12-991-004)
R (4) Tightening torques for plug-in unions
R R NOTE : The material of the lock-nut must be the same as the material____ of the swivel plug-in union or the bulkhead connection.
Tightening Torques for AN Unions
Figure 201/TASK 20-21-12-991-001
1EFF : ALL 1 20-21-12 Page 203
1 1 Feb 01/98
1 1
1CES 1
R Tightening Torques for Flexible Hoses (both Parts Made of Steel) Figure 202/TASK 20-21-12-991-002
1EFF : ALL 1 20-21-12Page 204 1 1 May 01/05 1 1 1CES 1
R Tightening Torques for Flexible Hoses (one of the Parts Made of Aluminum-Alloy) R Figure 203/TASK 20-21-12-991-011
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