“SUN” SERVICE STATION

Sun (Auckland), Volume IV, Issue 1012, 1 July 1930, Page 6

“SUN” SERVICE STATION

’Motordum" section of The Su Queries and Answers Departme accurate Information regarding mech ever the particular puzzle c may be ic or motoring Information of any Kind, refer the point to men whe are rei respective lines All communications must oe acc« address (not for publication), and Motordom ’ TUB SUN Auckland “ Urgent.” —Can you supply me with a solution of my trouble? I drive an International light 4 S.P.O.R. model, and after doing 4.000 miles I broke a back axle. On taking it out I found it had been twisted off in the spline, and after replacing it the opposite axle broke in the same way. Altogether I have had about seven axles in 12 months, both left and right. I am a very fair driver, and have driven all makes of cars for 10 years. The fact that axles are being twisted off does not sho\f that these shafts are in any way faulty. Our experience teaches us that the twisting off of axle ends is entirely due to the conditions under which the truck is working, namely, overloading and heavy pulling conditions. The model S.P.D. is it one-ton truck, and undoubtedly in this case the loading is very much in excess of its capacity, and the truck is used in places where the pulling is exceedingly heavy. If we were acquainted with the actual conditions under which this is working, we could certainly tender further adW.R.—I have a 1927 Dodge, and I am having a lot of trouble with the radiator, which continually boils if J go over 25 m.p.h. for long. I haveliad' new valves put in and the timing altered, yet it still boils. Also, if I accelerate to pass another car, the tappetts start to squeak. I have had them adjusted but they are as bad as before. I would be much obliged if you can tell me the Cause of this and a remedy * * Without having the opportunity of carrying out an actual test of your vehicle, it is difficult to diagnose the actual cause of over-heating, which can comipence due to many reasons, which would not be present in the motor if it was operating normally, such as fouled radiator tubes, partly blown cylinder bead gasket, retarded ignition, over rich or over lean mixture. fouled spark plugs, fouled distributor points and incorrect adjust- j xpent of same, partly leaking piston j

n includes in its service to readers a nt, the object of which Is to give anical and touring subjects. Whatl either diagnosing irritating troubles “Headlight’ will endeavour to help, or cognised automobile experts Id their ompanted oy the inquirers name and sent to TUB SUN '‘Service Station , Answers will appear weekly io thi* rings, poorly seated valves. As ample lubrication of valve stems is afforded in the design of the engine, dry and squeaky valve stems can be attributed to the excessive heat, much above normal heat of the engine, which is generated when boiling commences. therefore, when the cause of the boiling or over-heating is eliminated, valve stems will function correctly. P.M.C. —I have a 91 model Overland, the hand-brake of which won’t work. There is plenty of lining there, but it does not grip. Also can a set of brushes be put on the generator without taking it off, and how? Can you 1 suggest a way? (1) The hand-brake is so designed that pulling it back four notches on the lever's sector should press the bands on the inside of the drums equally against the drums inner surfaces. Should you find that the hand brakes are not taking hold in the course of the lever’s travel along its sector, take up on the front pull rod with adjustable yoke and at the bottom end of hand brake lever. Operate hand lever and try both wheels to make sure that brakes are adjusted equally; if not, equalise them by adjusting the rear pull rod leading from amidships rocker shaft to rear axle. Also make sure that the two taper pins which connect the rear hand brake inner shaft lever to the inner cam-shaft are not sheared off. Make sure that the rear hand brake bands are free from grease and floated correctly. The hand brake bands must bo kept tree from oil and grease. Should these substances accumulate, they will glaze the surface of the brake lining", causing the brakes to slip whenever braking effort is applied. *■ (2) It will be necessary to remove the generator for the purpose of fitting three generator brushes. When refitting the generator it will necessitate retiming the engine. If battery ignition retime with Ne. I piston 9-32nds before dead centre compression stroke, ignition lever fully advanced, ignition points just breaking