Kohler — (Static) Injection timing check and adjustment
Adjustments · Fuel injection pump
From a Kohler service manual covering: KD 626-3, KD 626-3 B2 NR, KD 626-3 EPA, KD 626-3 NR. Check it applies to your exact model before use.
Applies to: Kohler KD 626-3, Kohler KD 626/3 engine
Procedure
- Remove the rocker arm cover.
- Assemble tool 1460-266 (lever 1460-275, dial indicator 1460-274 in holder 1460-270).
- Insert capillary tester 1460-024 onto the injection pump union.
- Connect high-pressure pump 1460-273 supplied by a tank at least 100 mm above the injection pump.
- Unscrew the fuel supply union for the injection pump of the cylinder to be worked on.
- Rotate the crankshaft anticlockwise until diesel starts to flow out from the capillary.
- Change direction of rotation clockwise from the timing belt side.
- Press the high-pressure lever and rotate until fuel stops flowing from the capillary.
- Press the lever to bring the valve into contact with the piston crown; find dead centre and reset dial indicator to zero.
- Rotate the crankshaft clockwise and position the cylinder piston at top dead centre.
- Read piston lowering in mm and convert to degrees with the conversion table.
- Adjust static advance by adding seals G (to delay) or removing seals G (to advance); repeat for each cylinder.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Static advance values depend on r.p.m. and injector size (table)
- Conversion table from degrees into millimetres
Full service-parts list: Kohler KD 626-3 →
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.