(10) Item 48, Air Cleaner. Air cleaner must be secure, with air passages in good condition and clean. When operating under extremely dusty or sandy conditions, inspect air cleaner frequently and service as required.
(11) Item 49, Fenders (Mudguards), Luggage Carrier, Safety Guards, and Stands. Inspect these items for looseness or damage.
(12) Item 52, Appearance and Glass. Clean windshield, rear view mirror, and light lenses; inspect for good condition, secure attachment, and broken glass.
18. AFTER‐OPERATION AND WEEKLY SERVICE.
a. After‐operation Service is particularly important, because at this time the driver inspects his vehicle to detect any deficiencies that may have developed, and corrects those he is permitted to handle. He should report promptly, to the designated individual in authority, the results of his inspection. If this schedule is performed thoroughly, the vehicle should be ready to roll again on a moment’s notice. The Before‐operation Service, with a few exceptions, is then necessary only to ascertain whether the vehicle is in the same condition in which it was left upon completion of the After‐operation Service. The After‐operation Service should never be entirely omitted, even in extreme tactical situations, but may be reduced to the bare fundamental services outlined for the At‐halt Service, if necessary.
b. Procedures. When performing the After‐operation Service, the driver must remember and consider any irregularities noticed during the day in the Before‐operation. During‐operation, and At‐halt Services. The After‐operation Service consists of inspecting and servicing the following items. Those items of the After‐operation Services that are marked with an asterisk (*) require additional Weekly services, the procedures for which are indicated in step (b) of each applicable item.
(1) Item 54, Fuel and Oil. Fill fuel and oil tanks; fill oil tank within 1 inch of top; be sure to put oil in right tank and fuel in left tank; do not interchange caps. CAUTION: When operating under extremely dusty conditions, drain engine oil tank and refill with fresh oil as frequently as excessive contamination of the oil occurs.
(2) Item 55, Engine Operation. Test for satisfactory engine idle without stalling. Accelerate and decelerate engine, noting any tendency to miss or backfire, unusual noises, or vibration that may indicate worn parts, loose mounting, incorrect fuel mixture, or faulty ignition. Investigate any unsatisfactory engine operating characteristics noted during operation. Learn to recognize noise caused by loose primary (front) drive chain. Slack in excess of ½ inch total up‐and‐down motion can cause excessive noise which sounds like engine knock. Remove inspection cover for examination of chain.
(3) Item 57, Horn. If tactical situation permits, test horn.
(4) Item 59, Lights. If tactical situation permits, observe whether blackout and service lights operate with switch in its respective positions, and go out when switched off. Also see that lights are secure, and lenses clean and not broken. Observe whether both filaments of service headlight operate when dimmer switch on left handle bar is moved to its respective positions.