Most of the people I have talked to about the BD-144 diesel seem to agree that they are a miserable starting engine. If the glow plugs arn't up to snuff, forget it they won't start. The saying goes " If the sun goes behind a cloud for 10 min, you will need the glow plugs. Mine is no exception & I just excepted that this was the nature of the beast. But now I wonder, My dad has the use of a B434 AG tractor for around his place & it has the BD-154 which is the same basic engine as the BD-144 with a .250" larger bore. The 154 starts like a dream compared to my 144. I know the 144 in my dozer is in good shape, fresh rebuild, inj p/p & injectors serviced, pump spill timed to engine etc, it starts about the same as before it was rebuilt.
The 154 in the B434 has a questionable history, & to say the least is long in the tooth. So what are the differences between the 2 engines:My BD-144C : 1959 model with early style CAV BPE 4A 70R inline injection pump, Injector opening pressure = 2150 to 2200 psi.
19.3:1 compression ratio. Compression pressure = 475 to 525 psi @ 1750 RPM (???) Specs from book on BD-154 show:
CAV Model DPA rotary style injection pump, Injector opening pressure = 2350 to 2450 psi.
23.0:1 compression ratio. Compression = 445 to 470 psi @ cranking speed. Also found some specs on BD-144A:
Same fuel specs as the BD-154 but with a 21.1:1 compression ratio, compression= 330 to 355 psi @ cranking speed. So from what I see so far,the increase in compression ratio along with the increase in Injection pressure on the 154 would be benificial to starting. Anyone with experiences or insite into these little Gems, please jump in Doug
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