CAUTION: MAKE SURE YOU KEEP THE DETAILS OF THE BEARINGS ASSEMBLY
_______ TOGETHER. IT IS NOT EASY TO ASSEMBLE THE DETAILS OF THE BEARINGS ASSEMBLY.
(b)
Put the gearshaft, with the gear end down, into the PWA 85267 or PWA 88643 Base.
(c)
Remove one of the inner race and rollers from the oil bath and put it on the lower bearing journal of the gearshaft.
(d)
With the PWA 85348 Drift, the PWA 80130 Force Gage, and an arbor press, put a load of 1500 pounds (680.39 kg) on the bearing. 1) Remove the drift.
CAUTION: TO AVOID THE INCORRECT INSTALLATION OF THE BEARING SEAL
_______ SEAT ON THE GEARSHAFT, MAKE SURE THE SMALLER RADIAL SURFACE OF THE SEAL SEAT TOUCHES THE BEARING INNER RACE (SEE FIG. 402). IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE ENGINE CAN OCCUR.
(e)
Attach the bearing outer race to the generator housing with the two bolts. 1) Torque the two bolts to 27-30 pound-inches (3.051-3.390
newton-meters).
(f)
Install the bearing rollers in the mating outer race installed in the housing while you carefully install the gearshaft in the housing.
(g)
Install the bearing spacer on the gearshaft intil it touches against the bearing inner race.
CAUTION: MAKE SURE YOU KEEP THE DETAILS OF THE BEARINGS ASSEMBLY
_______ TOGETHER. IT IS NOT EASY TO ASSEMBLE THE DETAILS OF THE BEARINGS ASSEMBLY.
(h)
ENGINES PRE-PW-SB 72-206; Attach the bearing outer race to the housing with two bolts.
(i)
ENGINES POST-PW-SB 72-206 AND PRE-PW-SB 72-375; Attach the bearing outer race to the housing with one bolt.
(j)
ENGINES POST-PW-SB 72-375; Attach the bearing outer race to the housing with two bolts. 1) Torque the bolt or bolts to 27-30 pound-inches (3.051-3.390
newton-meters).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
BEARING OUTERRACE
SPUR GEAR SHAFT
L-B5212 (0597) PW V
EEC/PMA Alternator Drive Gearshaft and Bearing Assemby
Bearing Seal Seat Installation
Figure 402
H46002
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(k)
Remove the bearing inner race and rollers from the oil bath.
1) Install the inner race and roller on the upper bearing journal of the gearshaft.
(l)
Do the two steps that follow, at the same time.
1) Install the rollers with the mating outer race installed on the housing.
(m)
With the PWA 85438 Drift, the PWA 80130 Force Gage, and an arbor press, put a load of 1500 pounds (680.39 kg) on the bearing. 1) Remove the drift.
(n)
Put the bearing seal seat of the gearshaft to touch against the bearing inner race.
NOTE: You can use the PWA 86087 Drift, if it is necessary
____
(o)
Install a new packing, lubricated with engine oil, in the groove on the gearshaft.
(p)
Install the EEC alternator rotor sleeve spacer in the gearshaft to touch against the bearing seal seat.
NOTE: You can use the PWA 86087 Drift, if it is necessary.
____
(q)
Install a new packing, lubricated with engine oil, on the insert.
(r)
Install the insert, lubricated with engine oil, in the hole in the outer diameter of the housing. 1) Torque the insert to 150-170 pound-inches (16.948-19.207
newton-meters).
(s)
Install a new packing, lubricated with engine oil, on the plug.
(t)
Install the plug, lubricated with engine oil, in the insert installed in the housing. 1) Torque the plug to 65-75 pound-inches (7.344-8.474
newton-meters)
(u)
Install lockwire or safety cable and safety cable ferrule.
S 424-013-N00
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本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊(cè) 發(fā)動(dòng)機(jī) ENGINE 2(166)
