Installation Instructions
1812 Folder Disk Clutch Retrofit Kit
Martin Yale #WRA1812510
Background:
Early production Martin Yale Model 1812 Folders were originally equipped with a
spring-clutch type feed wheel clutch. These units are identifiable by the presence of a keyed feed
wheel.
Current production 1812 folders (After S.N. 1812: 39568.01122.M38, 1812230: 39566.01001.MXX,
1812UK: 39566.01001.MXX) are equipped with a friction disk type feed wheel clutch in lieu of the
previous spring-clutch. Folders with the friction disk type clutch can be identified by the presence of
bearings in the bore of the feed wheel. They can also be identified by the fact that the feed wheel on
these folders will spin freely of the feed wheel shaft in the direction that paper feeds.
This retro-kit allows a technician to convert an older unit originally equipped with the spring-type
clutch to the current disk clutch.
Parts Included:
The following parts are included with the WRA1812510 Clutch Retrofit Kit.
(1) M-S027951 Clutch Retro-Kit Instructions (this document)
(1) M-S001540 8-32 X 7/8 Truss Head Screw
(1) W-O2051368 Black Oxide Feed Wheel Shaft for Disk Clutch
(1) W-O2051369 Clutch Feed Wheel
(1) W-A2051085 Disk Type Feed Clutch Assembly
(1) M-S008126 #8 X .75” OD Fender Washer
(1) M-S010039 5133-18 E-Ring
(1) M-S045339 1812 Processor
(1) M-S019032 1/4 X 3/8 X .17ID Standoff
(1) M-S007006 8-32 Kep Nut
(2) M-S043021 .10 X 4 Blk Wire Tie
Tool List:
#2 Phillips Screwdriver-Medium Length
#2 Phillips Screwdriver-Short Length
Wire Cutters-Small to Medium Sized
11/32” Nut Driver, Socket/Ratchet/Extension, or Wrench
Flat Bladed Screwdriver-For Removal and Installation of E-Rings
Flat Bladed Screwdriver or Pen-Knife Blade-For Electronic Chip Removal on Logic Board
9/64” Hex Wrench
WARNING: Before any work is attempted on folder, assure that folder is disconnected
from power source by either removing the power cord or locking out the power source.
1) Remove (9) screws from the rear folder side cover (cover WITHOUT the operator panel in it) and
remove cover. This will expose the clutch mechanism See picture below for reference.
(1)
