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TM 10-4320-342-24
14-3.
DIFFUSER HOUSING ASSEMBLY REPAIR.
This task covers:
a. Inspect
b. Disassembly
c. Repair
d. Assembly
INITIAL SETUP
Tools
Equipment Condition
General Mechanics Tool Kit (App B, Sect III, Item 1)
Diffuser Housing removed (Para 3-19)
Calipers (App B, Sect III, Item 3)
Materials/Parts
Wear Ring (App F, Item 36)
NOTE
Repair of the 600 GPM suction manifold is shown, repair of 200 GPM suction
manifold is similar.
a. INSPECT. Refer to Figure 4-2.
(1)
Inspect the bronze wear ring (1) in diffuser housing (2) for wear. If wear is noticeable, use formula A - B = C to
determine wear on the bronze wear ring (1).
(a)
Measure the inside diameter of the bronze wear ring (1) to determine dimension A.
(b)
Measure the outside diameter of the impeller wear ring (3) to determine dimension B.
(c)
Subtract dimension B from dimension A.
(d)
Dimension C is the difference between dimension A and B
NOTES
If the difference between dimensions A and B on the 200 GPM diffuser housing,
P/N 43880, exceeds 0.024 inch, replace the bronze wear ring.
· If the difference between dimensions A and B on the 600 GPM diffuser housing,
P/N 4398-1, exceeds 0.026 inch, replace the bronze wear ring.
(2)
Inspect diffuser housing (2) for cracks, corrosion and worn or damaged seats.
b. DISASSEMBLY.
(1)
Remove spring pins (3) from diffuser housing (2).
(2)
Remove studs (4) from diffuser housing assembly (2).
4-4
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