If for any good reason it is necessary to alter the adjustment of the oil flow,
loosen lock-nut (B), Fig. 6, and turn screw (A) to the right (IN) to
decrease the oil supply, and to the left (OUT) to increase the oil supply.
Turn this screw only one half a turn at a time. After any adjustments,
be sure and tighten the lock nut (B). When the screw (A) is all the way
in against (B) the oilier will not pump.
IMPORTANT! WHAT TO DO IN CASE OF AN AIR LOCK
The mechanical oilier can fail to pump only when the tank becomes dry.
If at any time, you run out of oil in the oil compartment, and ail lock may
result, and it must receive immediate attention. Relieve the Air-lock by
removing the screw (C) and wait until oil has flowed freely from this hole
for several seconds_until no bubbles appear in the oil issuing from the hole.
To insure that the oilier is pumping, remove the screw (D) and run the motor.
Oil should appear in drops through this hole. After testing, be sure and
replace the screw (D).
Adjustment and Repair of Automatic Oiler Fitted to
Indian Motocycles for 1928
B
The Automatic Oiler fitted to Indian Motocycles for 1928 is a very simple piece of mechanism,
and it does not depend on spring controlled check
valves for its operation. The old style check valves
were liable to be made inoperative by small particles
of dirt preventing them seating properly. With the
new positively operated rotating cylinder there is
very little chance of its failing to supply oil to the
motor. It alternately connects the intake and discharge ports of pump with the oil supply and cam
case as it rotates, operating the plungers at the same
time in correct relation to the ports.
In any piece of mechanism, no matter how
simple, certain things must be right, and the following items should be checked if for any reason it is found that the Automatic Oiler is not
working.
1. See that there is oil in the oil tank and that the oil is reaching the automatic oiler.
Remove screw "C" and observe if oil flows freely out of bleed hole.
2. See that the pump cylinder is rotating when motor is running. This can be checked
by removing oil supply pipe and air bleed screw "C", and as soon as any oil that may be
lodged in pump body above cylinder has drained away through air bleed screw hole, it will
be possible to observe if cylinder is rotating when motor is running by looking down the passage into the cylinder chamber.
Do not on any account endeavor to find out if pump cylinder is rotating by probing with
a wire or similar means, as damage to pump cylinder, worm or gear will surely result.
Should pump cylinder be found not to rotate, then oil pump will have to be removed
cam case cover for examination of driving worm and gear.
3. Plungers sticking or operating springs broken.
After oiler is removed from cam case cover the cap "E" should be removed (this is lefthand thread) and pump cylinder withdrawn, the plungers and springs can then be examined.
Should a spring be broken it should be replaced, and should plungers not work freely they
should be removed and cylinder and plungers thoroughly cleaned and oiled before being re-assembled. NOTE: Do not attempt to remove cylinder from pump body or take out сар "E"
while oiler is attached to cam case cover, as either or both the operating worm or gear will be
damaged by doing so.
4. Pump incorrectly adjusted.
The stroke of oiler plungers is varied by the position of screw "A" so the amount of
oil pumped is determined by the position of this screw. When this screw is fully in with its
head up to lock nut "B" the plungers have no movement and so no oil is pumped. A small notch
will be found filed in the head of this screw "A" and when this notch is on top with screw
fully in the pump is out of action, or in zero position.
For average use on Prince Motor the screw "A" should be turned out one turn and
locked in this position by lock nut "B". Use wrenches S-5452-Y supplied in tool kit for this
adjustment.
The adjustment for Scout is two and one-half turns out from zero position, and for
Chief four full turns out.
The above settings for oiler on the different models are approximate only, and if on
running the machine it is found less oil is required, turn screw "A" one-sixth of a turn in at
a time (first of course loosening lock nut "B", and then tightening it after the adjustment
has been made), until oiler delivers the correct amount of oil.
Should oiler not supply enough oil with the factory setting, then the screw "A" should
be turned out one-sixth of a turn at a time until sufficient oil is pumped.
For a visible check on the amount of oil being pumped by the oiler, it is necessary to
use test plug, Part Number S-5448-Y.
The method of operation is as follows:
Remove screw "D" and screw in test plug S-5448-Y in its place, then start up engine
and the oil being delivered by oiler will come through hole in test plug. The test plug seats in
oiler body in such a manner as to prevent any of the oil delivered by oiler being drawn into
cam case, as it otherwise would be due to the suction of air with new breather system on 1928
models.
Should any repairs be needed to oiler, other than the replacement of screws or plunger
springs, the complete oiler should be sent in to Factory, as due to the close and accurate fit
required between cylinder and oiler body neither of these parts will be supplied separately.