26)
(DMCL) Fix a cab end to one side at the
opposite end to toilet compartment (with the two small
end windows) and the non-cab end to the other side
adjacent to the toilet compartment to form an ‘L’ shape
half box as shown right.
Assuming care was taken when preparing the ends and
sides your sides will be level at the bottom. Ensure the
outside faces of the sides are aligned with the top and
bottom of the cab door cut-out. Allow the ends to
harden before attempting the next step.
**TIP - Working on a glass sheet will aid accurate
bottom alignment of the sides and ends.
27)
Assemble the two half boxes again using a flat surface to aid alignment. The box may twist a
little to during this process due to the flexible nature of the materials, but do not worry unduly as the
roof will bring everything back in line later.
LEAVE TO SET HARD AND BUILD THE BOGIES
The instructions here initially refer to an un-powered bogie. Note also that the bogie spues contain parts
that are not intended for the DMU so please refer to the illustrations to identify the appropriate parts to
use.
28.1)
Remove three bogie frame stretcher plates from the casting
sprues and cut off the ends level with the inside edge of the moulded
angle (see right). Clean up and square off as necessary.
28.2)
Push brass bearings into the axle holes making sure they are
an easy sliding fit, but not sloppy - if necessary clean hole with a
2.5mm drill. Do not fix in position as adjustments will be made later.
28.3)
Using a pin, add a tiny drop of oil (NOT WD 40) into the bearing surface.
28.4)
Place two non-driving axles in the bearings of one side frame and, ensuring correct orientation
of bogie frame stretcher plate (reinforcing cross members down), assemble the side frame to the frame
stretcher.
28.5)
Once the first frame is reasonably firm, assemble second side frame onto frame stretcher in
the same manner. When the side frames are secure enough to hold themselves in place, make certain
all is square and in line, minor adjustments can still be made at this stage by applying more solvent
to soften the joints and adjusting as required. Note: wheels should be a loose fit in the bearings at
this stage. Leave the bogie to set for at least 1 hour, 2 is better.
With the joints set hard you can now set the axle bearings:
28.6)
There is less side-play evident in the DMU bogies than is found in our coach bogies. If care
has been taken so far the wheelsets will require only minimal adjustment of the bearings to obtain
optimal performance, If adjustment is necessary begin by inserting a thin piece of card between each
wheel and the side frame to prevent lateral movement.
NOTE: Do not over-pack the wheelsets as this might cause the sides to spring when you remove the
card later resulting in stiff wheel movement.
5
CAB
TOILET COMP. END
NON-CAB END
TOILET COMP. END
DMCL /
DTCL
REMOVE SHADED AREA
CAB
BAGGAGE END
NON-CAB END
BAGGAGE END
DMBS
Содержание DERBY LIGHTWEIGHT CLASS 108 DMU
Страница 20: ...20 DMBS DMCL CASTINGS CONTROL DESK DETAILS...