Subtask 20-28-00-420-096
B. Installation of the Test Equipment
(Ref. Fig. 503/TASK 20-28-00-991-039)
WARNING : DO NOT TOUCH THE SOCKET 1 AND 2 OF THE CURRENT INJECTION SOURCE
_______ WHEN IT IS CONNECTED. THE OUTPUT VOLTAGE CAN BE MORE THAN 200 VOLTS AC. THERE IS A RISK OF ELECTRICAL SHOCK.
CAUTION : MAKE SURE THAT THE TEST EQUIPMENT IS CORRECTLY INSTALLED BEFORE
_______
YOU MEASURE THE BONDING VALUES.
(1) Connect the test equipment (refer to the instructions of the supplier) at the applicable locations.
4. Procedure
_________
Subtask 20-28-00-869-082
A. Measurement of the Loop Impedance
(1) Measure the applicable values.
Subtask 20-28-00-210-065
B. Check of the Loop Impedance
(1) Make sure that the measured values are not higher than the maximum R permitted values.
5. Close-up
________
Subtask 20-28-00-020-064
A. Removal of the Test Equipment
(1) Disconnect the test equipment (refer to the instructions of the supplier).
Subtask 20-28-00-942-111
B. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
R Loop Resistance Test Figure 503/TASK 20-28-00-991-039
1EFF : 1 1 1CES ALL 1 111 20-28-00 Page 544 May 01/99
O-RING INSTALLATION - MAINTENANCE PRACTICES
___________________________________________
TASK 20-29-00-911-002
Removal/Installation of an O-ring (Hydraulic Systems)
1. Reason for the Job
__________________
This procedure is applicable only for the installation of an O-ring on a
plug-in union or a manifold plug of hydraulic systems.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
98A29103000000 1 ASSEMBLY TOOL - HYDRAULIC SEALS
B. Consumable Materials
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
R Material No. 02-003 F NSA 307110 TYPE 4 HYDRAULIC FLUID (PHOSPHATE ESTER BASE) (Ref. 20-31-00)
C. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
20-21-12-911-001 Tightening Torques for Pipes Unions (not for OXYGEN unions) 20-29-00-991-001 Fig. 201
3. Job Set-up
__________
Subtask 20-29-00-869-050
A. Not Applicable 4. Procedure
_________ Subtask 20-29-00-911-052
A. Equipment
(Ref. Fig. 201/TASK 20-29-00-991-001)
ASSEMBLY TOOL - HYDRAULIC SEALS (98A29103000000)
Subtask 20-29-00-911-053
B. Removal of the O-ring. CAUTION : DO NOT USE POINTED, SHARP OR METAL TOOLS TO REMOVE THE O-RING.
_______ SHARP EDGES CAN CAUSE DAMAGE TO THE UNION/PLUG (GROOVES OR SEAL CONTACT SURFACES).
(1) Use spoon-type removal tools or a wedge-type removal tool with a hook to remove the O-ring.
(2) Discard the O-ring. Subtask 20-29-00-911-054
C. Installation of the O-ring.
CAUTION : DO NOT INSTALL THE REMOVED O-RING AGAIN. YOU MUST ALWAYS
_______ INSTALL A NEW O-RING BEFORE YOU INSTALL A REMOVED UNION/ PLUG AGAIN. A COMPRESSED SEAL WILL NOT GO BACK TO ITS INITIAL CONDITION.
(1)
Safety precautions
