NB 13/7/23 More information added re MM30SR wiring diagrams see below and new page:
MM50SR Electric Circuits and Error Codes p237 to p285
Operation & Maintenance Manual for SL series engines
SL Series Engine Service Manual
MM50SR Parts Manual ... in Japanese
MM30SR & MM40SR Operator Manual
MM30SR 5 relays below the seat. Safety arm and glow plug relay wiring.
Excavator Joysticks not working ... possible causes
MM30SR Fuel Hoses