Maintenance - Gearbox, Electrical Automatic transmission oil The transmission fluid level should be checked at least every 50 hrs.It should be checked when the fluid is cold and with the engine idling in neutral. Ensure the level is kept between the two small punched holes on the dipstick. NB approx 0.25l will raise the level from the lower mark to the upper one - Do not overfill Use ATF Dexron IID for topping up - top up through the dipstick tube. The oil and the oil filter screen in the bottom of the gearbox should be changed either by T.J. Frazier, your dealer or by a suitably qualified engineer every 600 hours.   Transfer gearbox oil The transfer gearbox oil level should be checked every 300 hours. The level can be checked by removing the level plug (3). It should be topped up through the same hole until it begins to run out. The oil should be drained (2) and changed every 1200 hours. Use one of the following oils. MIL-L-2105 90W EP MIL-L-2105B, C & D 80W EP Battery The battery fitted is ‘maintenance free’ and topping up is not normally required throughout the normal life of the battery. However, the level should still be checked when periodic services are carried out. Ensure terminals are kept clean and protected with petroleum jelly. An isolator switch is fitted to the outside of the battery box near the step for use in emergencies or when any welding or repairs are being carried out to the machine.   Wiring system A main feed is taken from the battery to a power distribution "bobbin" on the main electrical panel inside the main fuse box. The same panel is fitted with all the main fuses and relays. < 30 >