MD Helicopters MD Explorer - Centrifugal Fuel Booster Pump Cartridge Replacement; Fuel Booster Pump Cartridge Installation; Fuel Booster Pump Cartridge Removal

CSP−900RMM−2MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 413
Original
28-00-00
4. Centrifugal Fuel Booster Pump Cartridge
Replacement
A. Fuel Booster Pump Cartridge Removal
(Ref. Figure 404)
NOTE: This task is typical for LH and RH Cen
trifugal Fuel Booster Pump Cartridge re
moval.
Consumable Materials
(Ref. CSP−SPM)
Item Nomenclature
C802 Cloth, Non−Lint
Special Tools
(Ref. CSP−SPM)
Item Nomenclature
T802 Cartridge Pulling Tool
(1). Remove sump access panel assembly
B178 (Ref. Section 06-00-00).
(2). Detach wire harness (10, Ref.
Figure 403).
(a). Remove straight slot (short) screw
(16) and disconnect:
A111 (Q12D16) wire from left
booster pump positive (+) terminal.
A112 (Q13C16) wire from right
booster pump positive (+) terminal.
(b). Remove (long) Allen drive shoulder
screw (17). While applying upward
pressure to the shut-off lever arm to
prevent binding of the Allen drive
shoulder screw, remove:
A111 (Q35A16N) and (Q35B16) wire
from left booster pump negative (-)
terminal.
A112 (Q36A16N) and (Q36B16) wire
from right booster pump negative (-)
terminal.
Aviation Turbine Fuel
(3). Rotate fuel shut-off lever arm 180° out
of the way of the pump cartridge. This
lever shuts off fuel to the pumping
cavity. Upon removal of the pump
cartridge, approximately 1 pint (0.473
liters) of fuel will be lost. Drain fuel into
suitable container.
(4). Remove and discard lockwire securing
bleeder/drain plug (7, Ref. Figure 404)
from bottom of pump cartridge (2).
Remove and discard O-ring (6).
(5). Remove Spirolox retaining ring (5) from
bottom of fuel pump.
(6). Install cartridge pulling tool (T802) (8)
in pump cartridge drain boss.
(7). Slide the impact hammer of pulling tool
downward, impacting the bolt head.
Pull pump cartridge (2) straight
downward and remove from fuel pump
housing (9).
(8). Remove and discard O-rings (3, 4).
System Contamination
(9). Clean pump cartridge cavity and
Spirolox retaining ring with non-lint
cloth (C802).
B. Fuel Booster Pump Cartridge Installation
(Ref. Figure 404)
NOTE: This task is typical for LH and RH Cen
trifugal Fuel Booster Pump Cartridge
installation.
Consumable Materials
(Ref. CSP−SPM)
Item Nomenclature
C109 Grease
C702 Lockwire
CAUTION