User manual IBM 29 CARD PUNCH MAINTENANCE MANUAL

[. . . ] IBY / FE Supplement Date Unit 29 Card Punch Re: Order No. S225-3357-3 This Supplement No. SS23-4069 Novomber 23, 1970 Previous Supplement Nos. None IBM FIELD ENGINEERING MAINTENANCE MANUAL IBM 29 CARD PUNCH @IBM Corp. 1965, 1969 Pages to be inserted and/or removed are: Title Page, Preface iii through vi 1-9, 1-10 2-3, blank 3-1, 3-2 , 4-1 through 4-12 4-17 through 4-22 4-29, 4-30 4-35 through 4-41, blank X-1 through X-5, blank 3-5, 3-6 A change to the text is indicated by a vertical line to the left of the change; a changed o r added illustration is denoted by the symbol to the left of the caption. [. . . ] Unscrew grease fitting from mounting plug. Note: The next step requires realigning the code plate when reassembling. Loosen knurled thumb screw or remove slotted clip on vertical drive rod to relieve tension and remove vertical drive rod guide plate. Disengage the print rod from the print arm (Figure 4-22) by applying slight pressure on drive rod at lower end. Lift print drive mechanism from rear mounting plug. Remove two screws from each end of drive-unit anchor bar. Loosen screws in front mounting plug enough to permit disengaging the plug. Shake drive unit up and down (bed in vertical position) to free mounting plugs. Turn drive unit clockwise and remove from base. Before reinstalling drive unit, manually push punch extensions in as far as possible. Reverse procedure to install punch unit. Align groove in eccentric bearing to mark on print cam (Figure 4-22). Check printing. 4. 6. 6. 2 Without Print Feature Figure 4-20. Interposer Bail Contact Adjustment 1. Loosen setscrew in reduction housing gear hub and pull out flexible drive shaft. Use unused position of cable clamp to hold cable out of the way. 29 FEMM (11170) 4-11 S225-3357-3 FES: SS23-4069 Rear Grooves should meet Spring Figure 4-22. Remove the wires from punch clutch magnet and punch circuit breakers. Remove the slip-connectors from the interposer magnets. Remove the two screws in pin-sensing bail drive link. On reassembly, tighten these screws after punch drive unit is fastened into position with links extended. Remove the two screws from eachsend of drive-unit anchor bar. Loosen the screws in front mounting plug enough to permit disengaging the plug. Shake drive unit up and down (bed in vertical position) to free mounting plugs. [. . . ] Twin cards are 5-114 inches wide; other dimensions are the same as for single cards. With twin cards, more circuitry can be packaged in a given space than with single cards. The dualdensity twin card (Figure 6-3) has electrical components mounted on the front side of the card. This card contains as many as 14 reed relays. [. . . ]