Kit 16 - Flywheel, Con Rod & CrankModelWorks 4 inch Scale Burrell Agricultural Traction
Engine Kit 16 should include the crank but this will now be shipped later. Friday: Citylink attempted to deliver Kit 16 today but as I am busy on the boiler I will not go and collect it until tomorrow. Saturday: I have now collected kit 16 but other than checking the contents I will continue working on the boiler.
I may shorten the weighshaft bracket studs as them seem a bit
long.
There is now not much more I can do until the crank
arrives so I will be getting back to my POP
cart. The instructions warn of porosity of the crank casting and
I noticed one or two small holes through the general condition of
the casting was good. Cleaning up the casting was simply achieved with a
file. When gluing the splines with Loctite I used the vice to
push them fully home. (20/8/05) Don't
fit the splines until fit of spur gear is tested. On refitting the crank I needed to move the eccentric/pulley combination 1mm to the right, trouble was the reverse eccentric was hard up against crank. To fix the problem I slightly chamfered the bore or the eccentric so that in could get it closer to the crank. The last task was to fit the flywheel which necessitated removing the left hand wheel. I accomplished this surprisingly easily using the bottle under the hornplate. I had to shave a few thou off the flywheel key in order to get it to fit. I have turned my attention back to kit19 and am now partway through fitting the eccentric rods. Further adjustment of the crank and eccentrics is covered here also in the kit 19 entry.
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Tuesday
8 March: Today I tackled the weighshaft bracket. The first task was
to get the piston moving. It was extremely stiff so I removed
the top guide, loosened the bolt holding the lower and lubricated the
cylinder with steam oil. As it need a fair force to move and when it
did it jerked I fixed tool maker's clamps at each end of the guide to
limit the stroke in order to prevent running the piston into the steam
passages. After working it back an forth for a while it became
relatively free. When I tightened to lower guide's bolt it
jammed. By inserting shims between the guide and the cylinder cover
I was able to get the piston moving again freely. It took some time
to find exactly the right thickness, in this case it was about 5
thou. 
I
then fitted the weighshaft bracket and refitted the lower guide.
Fortunately this was just right with no adjustment needed. Similarly
I fitted the top guide with out much trouble, it only being necessary to
deepen the counter sinking of the guide to allow the knuckle to
pass. It took most of the evening but I am happy I have got the
piston moving freely with the guides fitted.
have not been completely idle. I have
painted the weighshaft bracket after I realised I would not be able to
remove it once I've fitted the studs. I did ponder
the colour as I have seen it painted either black or maroon. I decided on maroon. Whilst I was
in the painting mood I painted the main drive gears, winding drum
and the steering components previously forgotten. I also made a start on the
gear guards painting their insides with a nice thick coat of black paint.
Friday:
Painted the fly wheel and gear guard today. The fly wheel looks good
but I will be giving it another coat as it is so visible. I am not
so happy with the gear guards but I am sure I will be able to rescue them
with rub down with wet and dry.
Saturday:
I trial assembled the connecting rod today. Having made several of
these my self, all be it smaller, I was impressed with the finish achieved
by Modelworks particularly on the long taper.
Friday 6th May:
Monday:
Back to the Burrell after spending the
weekend fiddling with POP.
I had not
previously fitted the bearings to their housing and I found that I had to
remove about 10 thou from the left hand bearing's shoulder. I
did this with a file taking advantage of its safe edge so as not to cut
into the bottom. I only removed a little at a time I wanted a snug
fit.
I
trial fitted the connecting rod so that I could ascertain the number of shims
I would have to fit to the right hand bearing housing. The little end was
offset by 1mm so I fitted 2 x 0.5mm shims.