TM 5-3740-218-13&P
ENGINE AND PUMP ASSEMBLY HYDRAULIC PUMP ASSEMBLY REPAIR (CONT)
B. DISASSEMBLY
WARNING
Death or serious injury could result by repeated and/or prolonged
breathing and/or skin contact of drycleaning solvent (P-D-680). Use in a
well-ventilated area. Do not use near open flame or in excessive heat.
The flash point of this solvent is 100F-138F (38C-590C).
CAUTION
Keep work area as clean as possible to prevent contamination of pump
internal parts. Dirt or grit will damage machined surfaces, resulting in
leaks or premature pump failure.
(1)
Remove drive key from pump shaft.
(2)
Clean outside of pump assembly (1) with drycleaning solvent (item 59, Appendix E) and dry thoroughly.
(3)
Place pump assembly (1) in vise, shaft down.
(4)
Remove eight bolts (2).
(5)
Scribe matchmarks at junction of front plate (3), body (4), and back plate (5) to make sure parts will be installed
in same location and orientation that they are removed.
(6)
Remove pump assembly (1) from vise.
(7)
Hold pump assembly (1) in hands and pump shaft (6) against wooden block to separate front plate from back
(3)
plate (5). Body (4) will remain with either front plate (3) or back plate (5).
(8)
Separate sections by tapping protruding end of pump shaft (6) with plastic hammer.
(9)
Remove diaphragm (7) from front plate (3). Discard diaphragm seal.
(10) Lift backup gasket (8) from front plate (3). Discard backup gasket.
(11) Lift protector gasket (9) from front plate (3). Discard protector gasket.
(12) Lift diaphragm V seal (10) from front plate (3). Discard diaphragm V seal.
(13) Lift two springs (11) and two steel check balls (12) from front plate (3). Discard two springs and two steel check
balls.
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