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TM 10-4320-342-24
3-20. PUMP AND CLUTCH (200 GPM FUEL PUMP) REPAIR - continued.
Refer to Figure 3-27.
(30)
Use formula W - X - Y = Z to determine thickness of shim stack number five ( 1).
(a)
Measure from flange of clutch housing (2) to inside bottom of clutch rotor set (3) to determine dimension W.
(b)
Measure flange surface of bearing carrier (4) to top of bearing (5) to determine dimension X. Subtract from
dimension W.
(c)
Subtract dimension Y. Dimension Y is a constant. Y = 0.080.
(d)
Dimension Z is the required thickness of shim stack number five (1) based on the above.
(e)
Example of formula: 4.675 - 4.527 - 0.080 = 0.068 (31) Select shim stack number five (1).
NOTE
Two or more shims may be used to obtain dimension Z above. Shims are made up
of laminated layers and thickness of each layer is 0.002.
(a)
Select appropriate number of shims to obtain dimension Z above.
(b)
If necessary, peel appropriate number of laminated layers (6) from shims to achieve dimension Z above.
(32)
Install shim stack number five (1) and spring washer (7) inside of clutch rotor shaft (3).
NOTE
Ensure slots on clutch housing and drain hole on bearing carrier are opposite of
each other.
(33)
Install assembled components (8) in clutch housing (2) and secure with flat washers (9) and screws (10). Torque
screws 168 to 185 inch-pounds.
(34)
Insert a feeler gauge through the slots on clutch housing (2) to verify the gap between clutch armature (11) and
clutch rotor (12). The gap measurement must equal .0.045 to 0.055. if not, disassemble and add or subtract
thickness of shims per step (31) above.
(35)
Rotate clutch rotor shaft (3) by hand to verify proper operation.
3-65
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