I need help finding the problem with the starting system on my dozer first off starter burnt up replaced with new one and it wouldn't spin the starter replaced ignition switch and didn't solve my problem can someone please help me sort this out.....thanks
Hi james..for that electrical trouble u must doing an electrical voltage check (with multitester or avometer). Check ur battery, battery relay, Fuses. Also u must check B terminal on starting switch then C terminal when u turn the key to start position. Next, check the B terminal on starting motor ( must be 24V when starting switch turn to ON), then make sure there is 24V too on C terminal when u turn the starting swith to start.hope it help
Komatsu D37p-2 starting issues Thanks for the information... I did each step you requested and found the starter relay burnt on the starter side so I replaced it and same thing happened so I jumped the R terminal to the starter solenoid and it won't engage starter in the crank position but it will engage when you turn key to heat glow plugs.
Based on ur info, i think there is some mistakes on ur starting switch connections. Normally, starting motor will engage with turning the key to start position. Starting switch had 6 terminal, which B for battery +24, BR for battery relay, R1 for glow plug, R2 not use, C for starting motor and ACC for the accecories. I suggest to recheck ur connection. For the starting motor, it had 3 terminal, which B for battery (direct +24), S from the starting switch C terminal and R from the R terminal of alternator (this is for safety relay cut off funtion of starting motor when engine run). Normally, R terminal is 2-4 V when starting ON then 24 V when engine run. Recheck all ur starting system wiring connections again..hope it help