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R R PRE CFMI SB 73-0114
R (i) BSV nipple (250) and a new O-ring (260).
R NOTE : Only applicable for DAC engines.____
R (j) BSV nipple (250) and a new O-ring (260).
R (k) VSV head nipple (380) and a new O-ring (390).
R (l) VSV rod nipple (350) and a new O-ring (360).
R (m) PB plug (130) and a new O-ring (140).
R (n) PS plug (150) and a new O-ring (160).
R (o) OVBD drain nipple (490) and a new O-ring (500).
(2) Remove the remaining blanking plugs, caps, and covers from the HMU.
R R (3) Install the nipples and plugs in the ports of the HMU and torque as follows:
(a) VBV open nipple (220). TORQUE to between 270 and 300 lbf.in (3.05 and 3.39 m.daN).
R (b) RACSB nipple (410). TORQUE to between 135 and 150 lbf.in (1.52 and 1.69 m.daN).
R NOTE : Only applicable for non /P engines.____
R (c) TBV nipple (410). TORQUE to between 135 and 150 lbf.in (1.52 and 1.69 m.daN).
R NOTE : Only applicable for /P engines.____
R (d) VBV closed nipple (320). TORQUE to between 180 and 200 lbf.in (2.03 and 2.26 m.daN).
R (e) PCR nipple (290). TORQUE to between 180 and 200 lbf.in (2.03 and 2.26 m.daN).
R (f) HPTACC nipple (470). TORQUE to between 135 and 150 lbf.in (1.52 and 1.69 m.daN).
E E May 01/04 E E ECES ER (g) LPTACC nipple (440). TORQUE to between 180 and 200 lbf.in (2.03
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and 2.26 m.daN). R R PRE CFMI SB 73-0096 R
R (h) SOV nipple (580). TORQUE to between 135 and 150 lbf.in (1.52 and
1.69 m.daN).
R NOTE : Only applicable for SAC engines.
____
R R PRE CFMI SB 73-0114 R
R (i) BSV nipple (250). TORQUE to between 135 and 150 lbf.in (1.52 and
1.69 m.daN).
R NOTE : Only applicable for DAC engines.
____
R (j) BSV nipple (250). TORQUE to between 135 and 150 lbf.in (1.52 and
1.69 m.daN).
R (k) VSV head nipple (380). TORQUE to between 270 and 300 lbf.in (3.05 and 3.39 m.daN).
R (l) VSV rod nipple (350). TORQUE to between 180 and 200 lbf.in (2.03 and 2.26 m.daN).
R (m) PB plug (130). TORQUE to between 135 and 150 lbf.in (1.52 and
1.69 m.daN). Safety the PB plug with lockwire 0.032 in. (0.8 mm) dia. (Material No. CP8001) or lockwire 0.032 in. (0.8 mm) dia. (Material No. CP8002).
R (n) PS plug (150). TORQUE to between 135 and 150 lbf.in (1.52 and
1.69 m.daN). Safety the PS plug with lockwire 0.032 in. (0.8 mm) dia. (Material No. CP8001) or lockwire 0.032 in. (0.8 mm) dia. (Material No. CP8002).
R (o) OVBD drain nipple (490). TORQUE to between 135 and 150 lbf.in
(1.52 and 1.69 m.daN).
(4) If the FIXTURE HANDLING - HMU (856A1494G01) is not installed on the R HMU, then install the FIXTURE HANDLING - HMU (856A1494G01) on the R HMU. Use four 250-28UNF-2A x 50 in. bolts.
(5) Remove the blanking cover from the HMU mounting pad on the fuel pump.
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(6) Align the splines.
CAUTION : HOLD THE HMU LEVEL DURING THE REMOVAL/INSTALLATION. DO NOT
_______ PERMIT THE WEIGHT OF THE HMU TO FALL AGAINST THE DRIVE SHAFT OF THE FUEL PUMP. THE DRIVE SHAFT OR THE HMU CAN BE DAMAGED.
CAUTION : DO NOT HOLD OR MOVE THE HYDROMECHANICAL UNIT BY THE TORQUE
_______ MOTORS. CHANGES TO THE CALIBRATION OF THE HYDROMECHANICAL UNIT CAN OCCUR.
(a) Carefully align the splines on the drive shaft of the fuel pump with the internal splines of the HMU.
(7) When the splines of the fuel pump drive shaft and the HMU can R correctly engage, install gasket (180) on the HMU mounting pad and R carefully install the HMU.
R NOTE : Make sure that the gasket is serviceable, (Ref. TASK 70-21-00-
____ R 918-002).
(8) Install the washer (200) and nuts (190) on the HMU mounting studs.
(a) Use the WRENCH SET, RUN ON/OFF - MEC/FUEL PUMP NUTS (856A1469G01) to install the nuts that are difficult to reach.
(b) TORQUE the nuts (190) to between 120 and 140 lbf.in (1.35 and
1.58 m.daN).Use the ADAPTOR SET, TORQUE - MEC FASTENERS (856A1336G02) to torque the bolts.
(9) Install the flex-hose on the nipples and torque the coupling nuts and unions as follows: 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM 发动机燃油和控制 ENGINE FUEL AND CONTRO(106)
