I think I've figured out most of the mysteries of the
Yanmar parts catalog (see attached screenshots for example) but a few questions remain:
- A few part numbers seem to be wrong or missing. Did they make undocumented changes? (surprising since the catalog is otherwise actually quite good). Or is there a revision newer than the May 2017 update I have for my 2002 4JH3-TE? (I would be surprised if May 2017 parts are no longer available)*
- What is the "R" column? (after "I" column)
- "Lev" column? Most parts are level (?) 1 but some are 2 or 3. What is that?
- In one case a part number seems to be wrong - only one digit differs from the part actually available online. (119575-77510 in catalog is 719575-77510 online)
- Minor mistakes are that they show some parts that are actually optional, but don't mark them optional (air heater in suction manifold).
Things I did figure out:
- "-1" suffix on a part "No." indicates a newer part.
- The "I" column has a key at the bottom indicating the codes for back/forwards compatibility on part changes.
- "(D=E10799)" indicates the engine serial number they started including the newer part with. D = 4JH3-TE in this case (key is at top right).
Some parts have a month/year code instead - "(C=*2003.12)" indicates the newer part came after Dec 2003.
In some places they did "(A=E/#21955)" which I think is just an inconsistency - E/#21955 == E21955 (engine serial number).
- And some tables (Fig 23) have "(D=EXXXXX) (E=EXXXXX)". What does EXXXXX mean in terms of engine serial number?
*The part that I can't find is 129470-77590, the air intake
gasket between my turbo and engine body. One site says it's been replaced by 129150-77511, which is the air
heater gasket, but my engine doesn't have an air heater, and this change isn't in the parts catalog, and that part number actually doesn't exist in the parts catalog at all (which has an index of all parts present in the engine). Odd.