Kubota — Checking Fuel Injection Pressure
Testing & diagnosis · Injection nozzle
From a Kubota service manual covering: GL 11000, GL 7000, GL 9000, GL11000, GL11000-STD, GL11000-USA, GL6000, GL6000-AUS, GL6000-STD, GL7000, GL7000-STD, GL7000-USA…. Check it applies to your exact model before use.
Applies to: Kubota GL 11000, Kubota GL 7000, Kubota GL 9000, Kubota GL11000-STD, Kubota GL11000-USA, Kubota GL6000, Kubota GL6000-AUS, Kubota GL6000-STD, Kubota GL7000-STD, Kubota GL7000-USA, Kubota Z482-E2B-SEC-2 engine, Kubota Z482-E2B-SEC-3 engine
Before you start
- Check after making sure nobody stands in the direction the fume goes.
Procedure
- Set the injection nozzle to a nozzle tester.
- Slowly move the tester handle to measure pressure at which fuel begins jetting out.
- Replace the adjusting washer in the nozzle holder to adjust if out of specification.
Tools required
- Nozzle tester Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fuel injection pressure 13.73 to 14.71 MPa (140 to 150 kgf/cm2, 1991 to 2134 psi); 0.025 mm washer difference changes pressure approx. 235 kPa (2.4 kgf/cm2, 34 psi)
Full service-parts list: Kubota GL 11000 →, Kubota GL 7000 →, Kubota GL 9000 →, Kubota GL11000-STD →, Kubota GL11000-USA →, Kubota GL6000 →, Kubota GL6000-AUS →, Kubota GL6000-STD →, Kubota GL7000-STD →, Kubota GL7000-USA →, Kubota Z482-E2B-SEC-2 engine →
Source: Kubota 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.