OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER

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is to be sprung far enough to permit the removal of the four
valve mounting screws. This will permit the removal of the
complete assembly for convenience in dismantling the valve
assembly 274260.
164 . To d ism ant let he sa f e t y car 8 top r e lea 8 e val v e (r efer
dr. no. 274260). - The switch 231707 is removed by loosening
the two switch mounting screws 196780-7. Next remove the
three hex. nuts 191000-2, and the lever 274262-1 and the lirM
274262-5 can be dismantled. Loosen the lock nut 220718-7 and
insert a pin in the hole on the valve 274262-10 which will
permit the clevis 274262-:6 to be turned off the valve. Next
remov:e the four cover screws 180226-6, and the cover 274262-4
can be dismantled~ The valve 274262-10 can now be pulled out
of the body 274261-1. Next remove the four screws 180226-6
from the opposite end, and the cover 274262-2, washer 274262-8
and the spring 274263-2 can be dismantled.
l65~ To reassemble the safety car stop release valve. -
The parts are to be washed in a non-acid cleaning fluid and
reassembled in reverse of the dismantling Lnst.r-uc tIons c When
assembling the oil seal 274338-3 over the valve 274262-10,
slip the oil seal leader 274349-2 over the thread end of the
valve to prevent injury to the oil seal packing. This oil seal
leader will be found in the #1 spare parts box. All parts are
to be free from bind, which will·permit the valve to return to
the "Stop" posl tion, when the lever 274262-1 is released. When
assembling new valve in the body the OtlOIO oversize valve are
to be ground and polished to give a clearance fit of 0 110004 to
0 110003, and the sharp edges are to be stoned to break the sharp
edges.
166. To remove the latch and vent valve (refer dr. no.
274263). - It will not be necessary to drain the oil in the
system if a pan is used to catch the small amount of oil which
will be lost from the system, "Then the pipe connections are
broken. First remove the screws 190958-3 and 206829-3 from
the flanges 271697-7 and 274263-1. The tubing at the #6 and
#7 flanges is to be sprung far enough to permit the removal
of the four valve mounting screws. The linkage which connects
the valves to the latch mechanism is to be disconnected. The
valve assembly can be moved for convenience in completely dismantling
the valve.
167. To dismantle latch and vent valve(dr. no. 274263).
First remove the four cover screws 180226-6 from the stem end
cover of the valve assembly, and. the cover 274263-'3 can be
removed. The valve 274263-4 and the bushing 274266-1 can be
withdrawn from the valve body 274264-1. Removethe four screws