Do not wear watches, rings, or other jewelry which could short out battery
terminals while servicing battery. Do not smoke or use open flame around battery.
Battery may explode from a spark. Battery acid is harmful to skin and eyes. Wear
protective goggles to prevent injury to personnel when working with battery.
b. Remove forward step assembly (11) from gooseneck (para. 4-56) to gain access to battery.
c. Cut and remove steel strapping (12) from around battery.
d. Remove battery filler caps (13) and barrier material. Check level of electrolyte. Top off fluid level with distilled
water. Check electrolyte with hydrometer (item 17, appx. B). Charge battery, if required, using battery charger
(item 17, appx. B). Replace filler caps (13). Inspect and clean battery terminals and cables (14); then, reconnect
f. Perform semiannual (S) and annual (A) preventive maintenance checks and services (PMCS) (para. 4-10).
Perform the following checks and observe for binding, jerky movement, and unusual noises. If any malfunction occurs,
stop the operation and investigate the cause. If after all checks have been completed the semitrailer does not
malfunction, the semitrailer is ready for full operation.
b. Start and run APU (para. 2-16 or 2-17) to remove preservative oil. Run APU at half throttle until remaining
preservative oil has run through fuel system. When engine operation (running) smooths out and excessive
smoking stops, proceed with remaining checks.