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Full text of "Monroe MSB125: Various improvements to KAS, KAA, C and E models"

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MACHINE SERVICE BULLETIN #125 


SUBJECTS : 

A New style 1001 spring 
attached to studs on 
12-52 and 12-54. 

B New style lock for clear- 
out mechanism C & E models, 
superseding that shown in 
Machine Service Bulletin 

# 112 . 

C New style friction mecha- 
nism for drum 9-5 superse- 
ding that shown in Machine 
Service Bulletin #112. 

D Improved hammer spring 
9-25£ replaces 986. 


DATE: January 15, 1932 


TO ALL OEEICES: 

A New style spring 1001 is now attached to studs on assemblies 
12-52 and 12-54, in all KAS, EAA, C & E models to improve the 
spring action. This change can be made to machines in the 
field by removing old style spring 1001 together with spacing 
rod 1281, and assemblies 12-52 and 12-54. 

Scrap old style 1001 and 1281. Rivet carefully and securely 
to the inner faces of 12-52 and 12-54 spring stud 1277^ in the 
holes previously used for the purpose of attaching old style 
spring 1001. 

Reassemble 12-52 and 12-54. Assemble new style spacing rod 
1281x1 into new style spring 1001 and attach spring to studs 
1277£. This installation will not change the adjustment of 
the carriage shift as explained on plate #21 of Machine Service 
Bulletin #40. 

B This change includes an improved part 921^x1 shown as 92l£ in 
Machine Service Bulletin #112, which is assembled to the 921x1 
designated as 9-34 with a new style 1171x1 shown as 1171 and is 
secured in place -with screw 3003 and lock washer 69 with lock 
nut 2077. 

To install this mechanism remove the old style lock 9-34 as 
outlined in Machine Service Bulletin #112 (return same to the 
factory). Assemble the new style lock before attaching it to 
the 'motor bracket 9-90. Place blank 924^-xl on top of 921x1 
with undercut of blank to control the cross over lever for 
lower dials 9-12x1. Insert the new style eccentric adjustment 
stud 1171x1 into hols of blank 921ixl. Insert screw 3003 and 
secure with lock washer #69 and lock nut 2077 under shelf of 
blank 921x1 temporarily. 


. Assemble and adjust the new style lock mechanism as explained 
and illustrated in Machine Service Bulletin #112, using 953£ 
screw in place of 947. The purpose of a longer screw (953^-) 
is to control the clearout lever from sliding off the drum. 
Tighten screw 3003 securely and lock with nut 2077 without 
changing the adjustment of 92l£xl. 

MOTE: It is important that the new style clearing lock 92l£xl 

be properly adjusted to obtain satisfactory results of the 
clearout mechanism. 

C A change has been made to improve the friction which is ap- 
plied on drum 9-5 for lock for the clearout mechanism. 

To install the improved material, remove motor bracket 9-90 
and its plate 1520. Remove old style friction unit with 
shaft 1552 and scrap nuts 945, spring 1585, collar 1536 1/8, 
fibre washer 920 and shaft 946. 

Assemble new style friction unit as follows: Assemble 1536x1 

on shoulder of shaft 946x1 shown as 946, Machine Service Bul- 
letin #112. Assemble fibre washer 920x1 designated as 920 
against face of gear 1536x1. Assemble 1552^ into drum 9-5. 
Assemble this unit on shaft 946x1 with 1552$ against 920x1. 

MOTE: 9-5 must be assembled in the position shown in Machine 

Service Bulletin #112A and the corners of the slot designated 
as A. must be broken, top and bottom, before assembling to 

1552$. 

Assemble one collar 945x1 shown as 945, on shaft 946x1 with 
its large diameter against drum 9-5. 

Assemble new style spring 1585 on shaft 946x1. Assemble an- 
other collar 945x1 on shaft 946x1 with its small diameter lo- 
cated in hole of spring 1585. Insert retaining ring 85 in 
groove on shaft and clamp it in place. 

Assemble gear 1536^ on hub of the right hand end of 946x1. 
Insert unit into bracket 775C. Reassmble plate 1520. Reassem- 
ble motor bracket 9-90 to machine. To test the functioning 
of this mechanism consult Machine Service Bulletin #112. 

MOTE: These improved parts have been installed in all ma- 

chines recently manufactured; therefore, check present mecha- 
nism carefully before dismantling. 

D To improve the action of 9-24 hammer and hammer link, the pre- 
sent 986 hammer spring ha3 been replaced with a new style 
spring and connections 9-25$. (See figure 5, plate #10, Ma- 
chine Service Bulletin #108). 

To installv^^S-i remove complete assembly 9-25 (plate 3), re- 
. move spring* 9$§ and stud 1163. Scribe a horizontal center line 


between hole from which the 1163 was removed and the hole in 
the right hand corner of the blank. Scribe a vertical line 
5/8” to left of center of right hand corner hole and center 
punch intersection and drill a hole with #35 drill and coun- 
tersink opposite side of hole. 

Assemble stud 1163 in this hole and rivet it securely in 
place. Assemble 9-25^ between studs 1162 and 1163. Re- 
assemble unit. 

HOTS: Before reassembling keyboard to base of machine, 

check all adjustments carefully. 

Any of the improved material referred to in this Bulletin 
may be requisitioned from Orange at no charge. 



3PMS : L J 


Mr. H. Hitchcos 
Toledo* Ohio