9/26/2017
Service Manual Model J
http://www.sky-net.org.uk/kelvin/diesel/j_range/man/index.html
11/17
It is important to know immediately if the strainer has become choked, one method
is to feel frequently the water pipe from cylinder to silencer. A better method is to
paint the elbow below the silencer. Immediately the strainer becomes choked, the
water fails and the paint on this elbow creates a smell which warns you to stop the
engine.
67. CYLINDERS.--The attachment of the cylinder to the crankcase is important. The
bolts must be very tight. When the piston is up it should be exactly flush with the
cylinder. If not, add or remove a joint between cylinder and crankcase.
68. CYLINDER HEADS.--Joint with the cement to be found in the tool box or
obtainable from motor dealers Make the bolts very tight, and verify the valve
clearance
.
69. WATER PUMP.--This is an important accessory, and any abnormal noise or
leakage should be immediately investigated. The eccentric should be oiled daily. The
gland should be tightened down when the leakage is excessive. The gland is locked by
means of two sharp pointed screws which enter the packing. Should the ball joint
within the ram develop a knock, it may be tightened by means of the screwed verrule.
First slacken the three screws within the ram, then screw down the verrule by the
fingers applied to the screws. Tighten the screws and the slackness in the ball is taken
up. The packing should be completely renewed each time the engine is overhauled,
because in time it loses its grease and will score the rod. The valve seats are
renewable and held in position by solder. If the body of the pump is heated they fall
out.
70. PETROL COMPRESSION CHAMBER.--This becomes hot when run on petrol
at starting, but should cool off when running at full compression, when no leakage
should be noticeable at the priming plug. The rocker should be clear of the valve stem
about 1/16". This adjustment is made by rotating the upright to which the rocker is
attached. As the chamber must be in perfect alignment with the valve, it should not be
disturbed unnecessarily. Should the joint leak, screw the stud supplied into the end of
the valve stem, remove the nuts, the spring and the chamber; clean the faces with care
and remake the joint with the cement supplied. Should the valve leak, grind it by a
spanner applied to the upper nut while injecting petrol through the priming plug hole.
If this does not suffice, remove the head
.
71. VALVE CLEARANCE.--The clearance between the rockers and the; ends of the
push rods should be .006" with the engine cold; a gauge is provided. This must be
verified each time the cylinder heads are tightened down. If the valves are adjusted,
with the, engine hot, the clearance must be .010" or three times, the gauge; and should
be checked when the engine is cold.
72. VALVE GRINDING.--The inlet valves (rear) remain tight indefinitely, but the
exhaust valves should be ground every twelve months of running. If this is
neglected, the valves and the seats may become pitted beyond repair. A cutter to
recondition can be lent on request.
