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6
PREVENTIVE MAINTENANCE
- -
CUSTOMER ENGINEERING
3.
Lower Drive Housing
for wear and proper oil level. Remove the check plug
in the lower housing and check for proper oil level. Oil should be within
1" of check plug. Also check oil flow up through the vertical shaft by
removing upper housing plug and look for appearance of oil while
machine is running. Add IBM 1 2 lubricant, if necessary.
4.
C C Cams
(see G e n e r a l Section-Make
and Break Type Cams)
5.
C 6 Cams
(see General Section-Circuit
Breaker Cams)
6.
Emitters.
The emitter brushes should be carefully checked for wear and
damage. Replace brushes that show a noticeable bevel. Wipe any old
grease off the emitter segments and common rings and check for cracked
or missing segments. Apply a thin film of IBM lubricant 17. Then care-
fully check the emitter brush timing.
7.
M o t o r Generators
(see G e n e r a l Section)
8.
Relays
(see General Section-Duo
Relays)
9.
Control Panel
(see G e n e r a l Section)
[ I I.
Lubrication
IBM 6
(1) Duo relay armature pivots.
(2) CB cam contact arm pivots.
(3) Drive pulley ratchets.
IBM 9
(1) Oil cups on the upper base casting. These lubricate counter drive
shaft bearing on the upper base, emitter shaft bearings, CC cam shaft
bearings, and CB cam shaft bearings.
(2) Ball closing oil well in reset shaft gears.
(3) All oil cups on reset shaft.
(4) Oil cup on bearing casting to the right of the feed unit.
(5) Motor and generator bearings (only a slight amount).
(6) Two oil cups just back of lower gear housing.
(7) Oil cup on lower reset shaft.
(8) Oil cup on lower base casting. This lubricates counter drive shaft
bearings on lower base.
(9) Control panel pivot frame.
ISM 72
(1) Drive housing. Fill from top plug if oil level is lower than 1" below
check plug in lower gear housing.
IBM 77
(1) MCR armature pivot points.
(2) Reset clutch knockoff finger.
(3) Reset clutch pawl disengaging roller.
(4) Contact operating cam.
(5) All reset clutches.
(6) Light film on the following linen dilecto items:
(a) Emitter surface.
(b) CC and CB cam surfaces.
(c) CB cam rollers.
(d) Generator coupling.
(7) Relatch bar operating stud and guide for multiplying plates.
(8) Internal cut cams operating multiplying and column shift plates.
T E S T I N G
THE TEST DECK should be punched with the reading fields in the same
positions that the customer uses, wherever possible. The control panel should
be set up to use full capacity of the counters.
The customer engineer should write or interpret the individual and pro-
gressive totals on the back of each card. This may readily be done with a
Type 551 or 552 Interpreter by feeding the cards with a column 1 a t the
column 80 end of the hopper, 1 2 edge first, and wiring the control panel accord-
ingly. As the multiplier is being tested, the figure in the LHC and summary
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