Engine Overheats

83. Engine Overheats

Probable

cause

Possible

remedy

Cylinder cooling fins dirty ---------------------------------------------------- Clean dust and dirt from cooling fins.

Magneto timed late ----------------------------------------------- Time the magneto (par. 115).

Air shroud partially removed from engine-

-Install the missing shroud (pars. 118 and 119).

84. Engine Knocks or Develops Excessive Noise

Probable

cause

Possible

remedy

Magneto timing advanced too far -------------------------------------- Time the magneto (par. 115).

Carbon deposits on cylinder heads ----------------------------- Remove and clean cylinder heads (par. 124).

Flywheel loose -------------------------------------------------------------- Tighten the flywheel (par. 118).

85. Engine Exhaust Smoky

Possible

remedy

Probable

cause

Carburetor incorrectly adjusted --------------------------------------- Adjust the carburetor (par. 122).

Carburetor defective ------------------------------------------------------- Repair or replace carburetor (par. 122).

86. Engine Starter Fails to Operate

Possible

remedy

Probable

cause

ignition fuse.

Ignition

fuse

blown

Replace

brushes (par. 113).

Starter

brushes

worn

-..

Replace

connections or replace wiring (par. 113).

Electrical connections loose or corroded ------------------ -------------Tighten

starter switch (par. 138).

Starter switch contacts burned

-.. .. Replace

starter brushes (par. 113).

S t a r t e r brushes defective -.. -

--Replace

87. Fuel Consumption Excessive

Possible

remedy

Probable

cause

Carburetor incorrectly adjusted ---------------------------------------- Adjust the carburetor (par. 122).

Fuel tank leaking --------------------------------------------------------- Repair or replace fuel tank (par. 132).

Carburetor defective --------------------

Repair or replace carburetor (par. 122).

88. Ammeter Shows No Charge or Discharge With Engine Operating

Possible

remedy

Probable

cause

Electrical

connections loose or corroded ------------------- Clean and tighten electrical connections.

Generator

regulator incorrectly adjusted or faulty ------------- Replace generator regulator as required (par. 111).

Generator

V-belt loose or broken ---------------------------------------- Adjust or replace V-belt as necessary (par. 112).

Generator

inoperative ------------------------------------------------ Replace worn brushes (par. 112).

Ammeter

defective ---------

----------------- Replace ammeter (par. 137).

89. Ammeter Shows Excessive Charge

Possible

remedy

Probable

cause

Battery run down -------------------------------------------------- Charge battery.

Generator regulator defective -------------------------------------- Replace a defective regulator (par. 111).

Generator field winding grounded --------------------------------------Replace generator (par. 112).

90. Ammeter Needle Fluctuates Rapidly

Possible

remedy

Probable

cause

Electrical connections shorted or loose --------------------------------- Repair short circuits and tighten loose connections.

Generator commutator has high mica ------------------------- Report to depot maintenance.

91. Wheel Wobbles

Possible

remedy

Probable

cause

Wheel bent --------------------------------------------- Replace the wheel (par. 163).

Wheel loose on the hub -------------------------------------- Tighten wheel mounting bolts.

Wheel bearing incorrectly adjusted ----------------------- Adjust wheel bearing (par. 163).

92. Wheel Bearings Overheat

Possible

remedy

Probable

cause

Wheel bearings lack lubricant ------------------------------ Lubricate wheel bearings (par. 163).

Adjust wheel bearings (par. 163).

Wheel bearings incorrectly adjusted

AGO 5742A