Mathey Dearman 8SA Saddle Machine - Manual (Page 16)

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7.1 Timing the Ring Gear to the Pinion Gears
Adjusting of the timing requires the purchase of the 2 Axles (Figure 6 item 3 & Figure 7 item
5). One for the Single Bearing Bracket Assembly (Figure 5 item 4) and Double Bearing
Bracket Assembly (Figure 5 item 5)
Note: Redrilling of the old Axle will severely weaken the axle
7.1.1 In order to determine whether the Right or Left Single Bearing bracket assembly is out of time, it
will be necessary to rotate the Ring Gear (Figure 5 item 3) in the clockwise and counter clockwise
direction.
7.1.2 Remove both Top and Side Tie Rod Handles (Figure 5 item 6) from the Single and Double Bearing
Bracket Assemblies (Figure 5 items 4 & 5) by removing 3/8-16 x 1-1/4 Hex Head Cap Screws
(Figure 5 item 12 ) and Washers (Figure 5 item 13) using a 9/16" wrench.
NOTE: Save Hex Head Cap Screws (Figure 5 item 12) and Washers (Figure 5 item 13).
7.1.3 Remove the Crank Handle Assembly (Figure 7 item 2) from the Double Bearing Bracket Assembly
(Figure 5 item 5) from the side that is out of time
7.1.4 Remove 3/8-16 x 7/8” Hex Head Cap Screws (Figure 5 item 11) and 3/8” Washers (Figure 5 item
13) from the Single Bearing Bracket Assembly (Figure 5 item 4) that is out of time with a 9/16”
wrench.
7.1.4 Remove the Drive Chain (Figure 5 item 14) from the Sprocket (Figure 6 item 2) of the Single
Bearing Bracket Assembly (Figure 5 item 4).
7.1.5 Place the Single Bearing bracket Assembly on the table.
7.1.6 Remove 3/8-16 x 7/8” Hex Head Cap Screws (Figure 5 item 11) and 3/8” Washers (Figure 5 item
13) from the Double Bearing Bracket Assembly (Figure 5 item 5) from the side that is out of time
with a 9/16” wrench.
7.1.7 Remove the Drive Chain (Figure 5 item 14) from the crank Gear and Double Sprocket (Figure 7 item
4) of the Double Bearing Bracket Assembly (Figure 5 item 5).
Note: Do not loosen the 3/8”-16 x 7/8" Hex Head Cap Screws (Figure 5 Items 11) that holds the
other Single Bearing Bracket (Figure 5 item 4) and Double Bearing Bracket Assemblies (Figure 5
item 5) to the Saddle (Figure 5 item 1).
7.1.8 Place the Double Bearing bracket Assembly in a vise.
7.1.9 Maintenance and Installation of the Double Bearing Bracket Assembly
7.1.9.1 Place the Double Bearing Bracket Assembly (Figure 5 item 5) that was removed in a vise.
7.1.9.2 With a 5/32” / 4mm diameter drift punch remove 3/16” x 1 1/4” long Spring Pin (Figure 7 item 13) from
the Crank Gear and Double Sprocket (Figure 7 item 4) and 3/16” x 1” long Spring Pin (Figure 7 item 16)
from the Pinion Gear (Figure 7 item 9).
NOTE: Save 3/16” x 1 1/4” long Spring Pin (Figure 7 item 13) and 3/16” x 1” long Spring Pin (Figure 7
item 16) for reuse at a later time.
7.1.9.3 With a 5/32” allen wrench loosen the Socket Set Screw (Figure 7 item 17) in the Pinion Gear (Figure 7
item 9) of the Double Bearing Bracket Assembly (Figure 5 item 5).
7.1.9.4 Remove the Pinion Gear (Figure 7 item 9) and 1/2" Washers (Figure 7 item 15) from the axle (Figure 7
item 5) of the Double Bearing Bracket Assembly (Figure 5 item 5). Save the 1/2" Washers (Figure 7 item
15) for use at a later time.
7.1.9.5 With a 1/4" / 6mm drift punch drive the Axle (Figure 7 item 5) and Crank Gear and Double Sprocket
(Figure 7 item 4) assembly out of the Double Bearing Bracket Assembly (Figure 5 item 4).
7.1.9.6 With a 1/4" / 6mm drift punch drive Axle (Figure 7 item 5) out of Crank Gear and Double Sprocket
(Figure 7 item 4)
7.1.9.7 Press the new Axle (Figure 7 item 5) into Crank Gear and Double Sprocket (Figure 7 item 4) until is flush
with the face of the sprocket side of the Crank Gear and Double Sprocket.