S 864-031
(4)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
D.
Remove the Hydraulic Interface Module (HYDIM)
S 864-002
(1)
Open these circuit breakers for the applicable hydraulic system and attach DO-NOT-CLOSE tags:
(a)
P7 Overhead Circuit Breaker Panel
1) 7F03 HYDRAULICS HYDIM 1
2) 7G03 HYDRAULICS HYDIM 2
3) 7H03 HYDRAULICS HYDIM 3
4) 7J03 HYDRAULICS HYDIM 4
5) 7J01 HYDRAULICS DEMAND 1
6) 7H01 HYDRAULICS DEMAND 2
7) 7G01 HYDRAULICS DEMAND 3
8) 7F01 HYDRAULICS DEMAND 4
(b)
P415 Main Power Distribution
1) 415K37 HYD PRESS IND SYS 1
2) 415K38 HYD PRESS IND SYS 2
3) 415K39 HYD PRESS IND SYS 3
(c)
P414 Power Distribution Center - Left 1) 414G23 HYD 4 PRESS IND
2) P414 Left Auxiliary External Power Center Panel a) 414F18 HYDR PUMP CONT AUX 4 b) 414E18 HYDR PUMP CONT AUX 1
S 024-003
(2) Remove the applicable circuit card for the HYDIM (AMM 20-11-22/401).
TASK 29-11-42-404-004
3. Hydraulic Interface Module (HYDIM) Installation (Fig. 401)
_______________________________________________
A. References
(1)
AMM 20-11-22/401, Rack-Mounted Electrical/Electronic Module
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 29-11-42/501, Hydraulic Interface Module (HYDIM)
B.
Access
(1)
Location Zone
117 Main Equipment Center
C.
Procedure
S 424-005
(1) Install the applicable circuit card for the HYDIM
(AMM 20-11-22/401).
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S 864-006
(2) Supply electrical power (AMM 24-22-00/201).
S 864-007
(3) Remove the DO-NOT-CLOSE tags and close these circuit breakers: (a) P7 Overhead Circuit Breaker Panel 1) 7F03 HYDRAULICS HYDIM 1 2) 7G03 HYDRAULICS HYDIM 2 3) 7H03 HYDRAULICS HYDIM 3 4) 7J03 HYDRAULICS HYDIM 4 5) 7J01 HYDRAULICS DEMAND 1 6) 7H01 HYDRAULICS DEMAND 2 7) 7G01 HYDRAULICS DEMAND 3 8) 7F01 HYDRAULICS DEMAND 4 (b) P415 Main Power Distribution 1) 415K37 HYD PRESS IND SYS 1 2) 415K38 HYD PRESS IND SYS 2 3) 415K39 HYD PRESS IND SYS 3 (c) P414 Power Distribution Center - Left 1) 414L08 CMC L 2) 414G23 HYD 4 PRESS IND 3) P414 Left Auxiliary External Power Center Panel a) 414F18 HYDR PUMP CONT AUX 4 b) 414E18 HYDR PUMP CONT AUX 1 (d) P415 Power Distribution Center - Right. 1) 414L39 CMC R
S 744-032
(4) Do the self-test procedure for the HYDIM (AMM 29-11-42/501).
S 864-021
(5) Put the HYD PUMPS DEMAND switch, for the applicable hydraulic system, to the AUTO position.
S 784-022
(6) Make sure the hydraulic system pressure on the EICAS status display is between 2900 and 3150 psig.
S 714-023
(7) Make sure the PRESS light, for the demand pump, on the P7 overhead panel is off.
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747-400 MAINTENANCE MANUAL
(8) S 864-024Put the HYD PUMPS DEMAND switch, for the applicable hydraulic system, to the OFF position.
(9) S 714-025Make sure the PRESS light for the demand pump comes on.
S 714-026
(10)
Make sure a temperature indication, for the applicable hydraulic system, shows on the EICAS status display.
S 864-027
(11)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
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