| Tool Number | Description | Use | | --- | --- | --- | | 601 589 01 33 00 | Valve spring compressor | Overhead valve disassembly | | 617 589 01 21 00 | Injection pump gear puller | Remove pump without timing disturbance | | 603 589 00 33 00 | Pre-chamber extractor | Threaded puller for pre-combustion chambers | | 614 589 00 10 00 | Dial gauge holder for cam lift | Measure cam lobe wear |
Guidelines for oil and filter changes 0;b9f;, valve clearance adjustments, and cooling system pressure tests. om422 engine workshop manual
Prepared by: Technical Publications Dept. Validation basis: MB factory service data + field teardown analysis Next revision due: Upon introduction of electronic injection retrofits (if any) | Tool Number | Description | Use |
: It dictates critical maintenance schedules, including the "stopping procedure" for turbocharged versions (OM422A/LA) where idling after a full load is mandatory to prevent turbocharger damage. valve clearance adjustments