Kohler — Checking injection pumps
For these Kohler models: 25LD330-2, 25LD425-2.
Browse Kohler generators & specs →
Procedure
- Connect a pressure gauge with 600 Kg/cm² full scale to the
- Set the control sleeve (nr. 12, fig.39) to a mid-point delivery
- Turn the flywheel slowly until the plunger has completed a full
- Take the pressure gauge reading. If it is below 300 Kg/cm² the
- 06.2003
- 5302-607
- 03
- That the distance between the injection cams in the rest
- That the stroke of the piston with injection cams in the rest
- Insert barrel into pump casing with the fuel inlet hole aligned
- Insert delivery valve, copper gasket, spring, washer, filler, O-
- Insert plunger, with helical profile (A, fig.43) on the opposite
- Complete pump assembly with plunger (a, fig.44), control
- Tighten delivery valve holder (h, fig.44) to 4.5 ÷ 5 kgm torque.
- Check, by compressing the spring through its various work
- Secure the control sleeve using the pin (n, fig.44) screwed into
- 8 ÷ 54.4 mm, which corresponds to the bottom dead centre
- 06.2003
- 5302-607
- 03
- Injector casing - 2.Adjusting shim - 3.Spring - 4.Rod - 5.Distance
Tools required
- 4.Take the pressure gauge reading. If it is below 300 Kg/cm² the
- 1.Connect a pressure gauge with 600 Kg/cm² full scale to the
- During the test the reading on the gauge will show a progressive
Specs & torque values
- 2 and 2.1 mm.
- between 52.8 and 54.4 mm as shown on the data plate
- With the control sleeve at 10mm from the stop position and the
- 52.8 ÷ 54.4 mm, which corresponds to the bottom dead centre
Source: manual:Work Shop Manual GR 25_330_425 matr 1-5302-607.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.