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TM 10-4320-342-24
3-19. PUMP AND CLUTCH (600 GPM FUEL PUMP) REPAIR - continued.
Refer to Figure 3-18.
(26)
Use formula P - F - R = S to determine thickness of shim stack number four (1).
(a)
Install assembled components (2) on shaft (3).
(b)
Install washer (4) and nut (5) on shaft (3). Torque nut to 180 lb-in.
(c)
Measure distance from flange of bearing carrier (6) to top edge of assembled components (2) to determine
dimension P.
(d)
Subtract dimensions P from dimension F. Dimension F was determined in para 3-19(.8)(d) shim stack
number two procedures.
(e)
Subtract dimension R. Dimension R is a constant. R = 0.040.
(f)
Dimension S is the required thickness of shim stack number four (1) based on the above.
(g)
Example of formula: 1.690 - 1.610 - 0.040 = 0.040 (27) Select shim stack number four (1).
NOTE
One or more shims may be used to obtain dimension S above. Shim is made up of
laminated layers and thickness of each layer is 0.002.
(a)
Select appropriate number of shims (1) to obtain dimension S above.
(b)
If necessary, peel appropriate number of laminated layers (7) from shim to achieve dimension S above.
(28)
Remove nut (5), washer (4) and assembled components (2) from shaft (3).
(29)
Install shim stack number four (1), assembled components (2), washer (4) and nut (5) on shaft (3). Torque nut to
171 - 188 inches-pounds.
(30)
Install assembled components in clutch housing (8). Gap may be verified by measuring between rotor (9) and
armature (10) thru slot on clutch housing. Gap should be between 0.035 to 0.045. If not, adjust last shim stack
number four (1).
3-45
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