16
20. Coupling
30.
W
(10).
Comecting Rods. The coupling and comceting
Tous are to be forged from Vibiac Stool and ale to be similar
in design to those shown on Drge. Now. .4472; 151 & 152 and
2.4472/149 & 150 Lespectively, Reg. No. 251/1.
The Bushes for the big and skill ouds of tho comecting
rods are to be of guotai and the coupling rod bushes ULC
to be of Amorphous Fhosphor Bro120, Bang's Lublicatuls of
malleable cast iron ale to be fitted.
Cylinder Cocks & Reliof Valvos. The cylinder cocks 810 to be of the same design at that shown on Drg.No.24472/08,
Re. No.20 1/1 at ito. A and operated from the cab by moans
of hand-gosa, the details of which are shown on Dig.No.
4.4472/141 which may be modifica where required.
Reliof Valves as shown on Dag. No. 2.4472/68 at item ""
aic to be fitted at each end of the cyliICES.
mucci
31. Coupled Mecl Tyrc, Ales & Cromi Fins. The coupled
wheel tyles are to be of clase "D" stool (B.D.D.No.4.
Report No.24 of 1:21) sozbitically tloutod and are to be ol
chactly the same section as show on Jis. No.4.4472; 104, Loy. No.251/1 for the respective whools, the driving ty On
having thin flanges.
The coupled walet aro to bo kdo in accordance with
the British Standard Specification No.2, Hoport No. 24,
Revised 1921.
1018,
The journals are to be increatod to " dia. x 14" long,
an a low boarlung plostule is roquiled.
The crank pins are to be of class "C" steel with nuts
oi clase "" steci. the box key for the Lut of the loading clankpins is to be supplica as thown on Drg. No.2.4472/LUD
Rog.No.251/1. The tuni5 centies are to be left in the
ends of the axles and clankpins.
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