1. Engine oil pressure switch
2. Fuel unit
3. Alternator
4. Thermo unit
5. Amplitude selector solenoid
valve (front)
6. Amplitude selector solenoid
valve (rear)
7.
Brake release solenoid valve
8.
Speed selector solenoid valve
9. Hydraulic oil filter switch
10. Glow plug
11.Tachometer sensor
12. Engine stop solenoid
13. Starter
★ Above figures illustrate location of electric key units of SW502.