Teletype 33 Disassembly And Reassembly

TELETYPE CORPORATION
Skokie, Illinois U. S. A.
SECTION 574-125-702TC
Issue 2, February 1969
33 TAPE PUNCH
DISASSEMBLY AND REASSEMBLY
CONTENTS
PAGE
1. GENERAL ...................
1
2 .
DISASSEMBLY AND REASSEMBLY . . 1
CHAD CHUTE ASSEMBLY . ....... 1
PUNCH BLOCK ASSEMBLY . ......
2
A.
Early Design ......•..•..••
2
B.
Late Design . . . . . . . • . • . . . . .
2
TAPE GUIDE ASSEMBLY ..•.•••. 3
PAWL
UPSTOP ASSEMBLY ••••••.
3
SENSING LEVERS AND
GUD>EPLATE ASSEMBLY •••••••• .
4
PAWL,
LEVER, AND SPRING
COMBINATIONS. • . • • • . • • . • • . . .
4
1. GENERAL
1. 01 This section is reissued to incorporate
all recent engineering changes and to
present disassembly and reassembly information
exclusively for the 33 tape punch. Since this is
a general revision, marginal arrows, used to
indicate changes, have been omitted.
1. 02 References to left, right, front, rear,
etc, consider the tape punch to be viewed
from a position where tape guide assembly faces
up and the backspace lever is to the viewer's
left. Orientation references in the drive link
mechanism area consider the drive
link
to
be
up
and located to the viewer's right.
1. 03 Disassembly, as outlined in this section,
covers the procedure for removing the
principle subassemblles which make
up the unit.
If further disassembly is required, refer to Sec-
tion 574-125-BOOTC, which shows detailed ar-
rangementof parts. Where itwill help indeter-
mining their location, the numbers of ·-. the parts
are given in the instructions.
1. 04 When self-tapping screws are used to
mount mechanisms onto castings, do not
remove the self-tapping screws. Merely loosen
them enough to remove the mechanisms unless
specifically instructed otherwise.
1. 05 Retaining rings are made of spring steel
and have a tendency to release suddenly.
To avoid loss of these rings when removing them,
proceed as follows.
(a) Hold retaining ring to prevent its rotating.
(b) Place blade of screwdriver in one of
ring's slots and rotate screwdriver to in -
crease diameter.
(c) Ring will come off easily in fingers with-
out flying.
1. 06
All tools used to remove the mechanisms
referred to in this section can
be
found
in the 570-005-S00TC standard tool section. No
additional special tools are required.
1. 07 All damaged, worn, or distorted parts
should be replaced if encountered in the
disassembly and reassembly procedures.
2. DISASSEMBLY AND REASSEMBLY
Note: For information concerning the proper
procedure to remove the tape punch from the
set, refer
to
the set disassembly and reassem-
bly section, 574-100-702TC.
CAUTION: BEFORE BEGINNING DISASSEM-
BLY, REMOVE CONNECTORS FROM EX-
TERNAL RECEPTACLES(POWER SOURCE,
DATA SET, ETC).
CHAD CHUTE ASSEMBLY
2. 01 To remove the chad chute assembly
(Figures 1 and 3), proceed as follows.
©
1963, 1964, and 1968 by Teletype Corporation
All rights reserved
Printed in U.S. A. Page 1