Isuzu Repair Manuals
Isuzu engine repair manuals with complete teardown, rebuild, and diagnostic procedures. The 4HK1/6HK1 service manual covers both the 5.2L and 7.8L engines used in Hitachi ZX200 through ZX370, Case CX series, and JCB JS excavators. The 4JJ1 workshop manual handles the 3.0L four-cylinder found in compact excavators from Hitachi, Kobelco, and JCB.
For the 4JJ1 specifically, we also carry the AI-4JJ1X shop manual (full mechanical overhaul) and the AI-4JJ1X troubleshooting manual (fault codes, diagnostic trees, sensor testing). A separate 6HK1-only service manual is also available for the 7.8-liter engine. Need part numbers? See Isuzu Parts Manuals.
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