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747-400 MAINTENANCE MANUAL
S 864-005
(4)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P7, Overhead Circuit Breaker Panel
1) 7E7, L STAB TRIM S/O VLV
2) 7E20, R STAB TRIM S/O VLV
S 864-006
(5)
If the electrical power is not necessary, do this task: "Remove Electrical Power" (AMM 24-22-00/201).
S 014-007
(6)
Open the access door 312A (AMM 06-09-05/201).
S 024-008
(7)
Remove the hydraulic motor:
(a)
Disconnect the hydraulic lines at the hydraulic motor (15).
(b)
Seal the hydraulic lines with plugs and the ports with caps.
1) If you replace the hydraulic motor with a new unit, remove the adapters, the elbow and the plug.
NOTE: Keep the adapters, the elbow and the plug for the
____ installation of the replacement unit.
(c)
Remove the bolts (5 and 9).
(d)
Disengage the hydraulic motor from the splined drive.
(e)
Remove and discard the O-ring (3).
TASK 27-41-10-404-009
3. Stabilizer Trim Hydraulic Motor Installation (Fig. 401)
____________________________________________
A. Standard Tools and Equipment
(1)
Bucket - 1 gallon capacity (for hydraulic fluid)
B.
Consumable Materials
(1)
D00633 Grease - BMS 3-33 (Preferred)
(2)
D00013 Grease - MIL-G-23827 (Optional)
(3)
D00054 Lube, Skydrol Assembly - MCS 352
(4)
C00259 Primer, Corrosion Inhibiting - BMS 10-11, type I
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C. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 3 | O-Ring | 27-41-06 | 01 | 241 | | | 5 | Bolt | | | 206 | | | 9 | Bolt | | | 201 | | | 10 | Washer | | | 211 | | | 11 | O-Ring | | | 295 | | | 12 | Union | | | 255 | | | 13 | Elbow | | | 245 | | | 14 | Nut | | | 216 | | | 15 | Motor | | | 226 | | | 16 | O-Ring | | | 280 | | | 17 | Ring - Backup | | | 270 | | | 18 | Adapter | | | 240 | | | 19 | Adapter | | | 235 | | | 20 | Ring - Backup | | | 275 | | | 21 | O-Ring | | | 285 | | | 22 | Elbow | | | 250 | | | 23 | Nut | | | 265 | | | 24 | O-Ring | | | 290 | | | 25 | Plug | | | 260 | | | | | | | | 2......…........…...................................…...........….....…........1
D. References
(1)
AMM 06-09-05/201, Body Section 48 Access Doors and Panels
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 27-41-00/201, Horizontal Stabilizer Trim Control System
(4)
AMM 29-11-00/201, Main Hydraulic Supply System
E.
Access
(1)
Location Zone
311 Area Aft of Pressure Bulkhead, LH
312 Area Aft of Pressure Bulkhead, RH
(2)
Access Panels 312A Horizontal Stabilizer Jackscrew Access Door
F.
Procedure
(1)
Clean the open areas of the differential motor shaft.
S 644-011
(2)
Apply a large quantity of grease (BMS 3-33 or MIL-G-23827) to the open areas of the differential motor shaft.
S 144-010
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747-400
MAINTENANCE MANUAL
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