TM 1-1520-238-23
3-217
3.58.
PARKING BRAKE MASTER CYLINDER DISASSEMBLY/ASSEMBLY (AVIM) – continued
j. Check components for dimensional tolerance. Use steel rule, inside, and outside micrometers.
(1) Cylinder ID at rod end shall be 0.3750 to 0.3774 INCH.
(2) Cylinder ID at piston end shall be 1.2500 to 1.2524 INCHES.
(3) Head piston OD shall be 1.2473 to 1.2485 INCHES.
(4) Piston rod OD at rod end shall be 0.3728 to 0.3740 INCH.
(5) Piston rod ID at poppet end shall be 0.4995 to 0.5007 INCH.
(6) Piston OD shall be 0.1557 to 0.1562 INCH.
(7) Piston assembly OD at poppet end shall be 0.4974 to 0.4985 INCH.
(8) Piston assembly ID mating with poppet shall be 0.3425 to 0.3437 INCH.
(9) Piston assembly ID mating with piston shall be 0.1570 to 0.1592 INCH.
(10) Cylinder brake cap ID shall be 0.6865 to 0.6877 INCH.
(11) Cylinder brake piston OD and seat shall be 0.6843 to 0.6855 INCH.
3.58.6. Assembly
a. Lubricate all parts in hydraulic fluid before assembly. Use hydraulic fluid (item 93, App F).
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