Union Pacific Locomotive #119 and Central Pacific Locomotive #60 ...

cylinders bolted together. The center casting for the truck and its
seat are planed and drilled through a template, and bolted in position.
The ports in the valve seat are milled to size by a cutter from a
gauge which is bolted on the valve seat. The cutter works in a block
which slides in slots in the gauge, corresponding to the ports. All
the holes for steam chest studs, cylinder head, and frame bolts are
drilled through templates. The templates are made of cast iron, and
have the h'oles in them bushed with hardened steel.
CYLINDER HEADS
are the same diameter as the flanges of the cylinders, and are fitted
thereto with scraped joints. The front'heads have a groove turned
in them next to the counter-bore,' to 'protect the cylinders in case of
accident. The flanges of the stuffing-boxes on the back heads are
circular, to receive the casings.. Both the stuffing box and. gland have
brass bushings-fitted to the piston-rods. The gland studs are casehardened
and provided with lock nuts. •
STEAM-CHESTS ' • : ;
are made with pockets .on the inside for the bolts, the covers have
ribs both on the inside and the outside to stiffen them. The joints
between the chc^t cover and cylinder are made with copper gaskets.
All the holes in the chests and cover.s are drilled through the same
template that is used for the cylinder. . , . . .
• . " ' VALVES • :
are of cast iron, and have their faces scraped to the valve seat. The
stem is attached to the valve, by a yoke which embraces the valve.
The stem is connected to the valve rod by a socket joint.
' PISTONS.
The heads and followers are made of cast iron, are turned to
gauges,, and fitted with brass packing rings. The piston-rods are
.THE GRANT LOCOMOTIVE.
made of cast steel, and arc fitted taper into the pistons and cross-heads,
and keyed to them, ' • • • .
GUIDES
are made of cast steel, four to each cross-head, and are placed central
on the cylinder head. Each pair of guides is bolted at each end to •
a block, one of which is fastened to the- cylinder head and the other
to the guide yoke by a stud and nut. The guide blocks, are faced off
in a special chuck (which receives a full set) to an exact thickness.
The guides and blocks are bolted together and planed and finished to
a gauge. ' '.
The holes in cylinder head, and guide yoke, which receive the
slide block studs, are drilled through a template.
: \ •' GUIDE YOKES. " . \ •arc
made of plate iron, planed and finished to a template. They are
bolted to the frames by a lug and to the rocker-box. They are fastened
to the boiler by an angle iron, and form a bracket for the running
board. • • ; *
' ' CROSS-HEADS , '
are made of hard cast iron, and. are all fitted with glass bearings to
prevent wear. • ' .
The neck of cross-head is first bored taper to fit the piston rod, the
cross-head is then placed on a mandril .with a gauge attached to it and
planed. The journal for the connecting-rod is cast in the cross-head,
as is also the lug for driving thepump.
ROpKERS
are made of wrought iron, forged solid, and are finished all over, to
gauges. Each arm has a boss on the end, and is furnished with casehardened
taper pins for valve rod, and link.
. The rocker-boxes, are made in two pieces, bolted together, and
also bolted to the frame and yoke brace.