22-4. PRIMARY
TM 9-2320-279-34-3
M978 Tanker Maintenance Procedures Instructions (Cont)
Handle carbon seal by edge only. Fingerprint or
contamination on sealing surface will cause pump
malfunction.
(24)
Apply a few drops of grease to carbon
seal (23) to hold it in place during
assembly.
(25)
Install carbon seal (23) in shaft seal (24).
Adhesives, solvents, and sealing compounds can burn easily, can give off harmful
vapors, and are harmful to skin and clothing. To avoid injury or death, keep away
from open fire and use in well-ventilated area. If adhesive, solvent, or sealing
compound gets on skin or clothing, wash immediately with soap and water.
(26)
(27)
Wipe sealing surfaces of stationary seal (21) and carbon seal (23) with dry cleaning solvent.
Install shaft seal (24), spring (25), and spring centering washer (26) in intermediate housing (8).
NOTE
Pump is shimmed for maximum efficiency. Be sure to
install same number and thickness of shims as in removal.
(28)
Install same number and thickness of shims (27)
as removed.
(29)
Install impeller (28).
(30)
Hold coupling half (17) so it does not turn, and
tighten impeller (28) handtight on impeller
shaft (11).
Adhesives, solvents, and sealing compounds can burn
easily, can give off harmful vapors, and are harmful to
skin and clothing. To avoid injury or death, keep away
from open fire and use in well-ventilated area. If
adhesive, solvent, or sealing compound gets on skin or
clothing, wash immediately with soap and water,
(31)
Apply silicone adhesive-sealant and install
gasket (29) on volute casing (2).
(32)
Install intermediate housing (8) with eight
nuts (30). Tighten nuts to 40 lb-ft (54 N•m).
(33)
Turn coupling shaft (17) by hand to check
that impeller (28) turns freely. If impeller
does not turn freely, remove intermediate
housing (8), impeller (28), and one impeller
shim (27). Go back to step (29) and continue,
22-24 Change 3
