Fuel System - Kubota GR1600EU Workshop Manual

GR1600EU, WSM

(4) Fuel System

Injection Timing
1. Remove the injection pipes.
2. Remove the engine stop solenoid.
3. Turn the flywheel counterclockwise (facing the flywheel) until
fuel flows from the delivery valve holder.
4. Continue to turn the flywheel slowly, and stop it as soon as the
fuel level at the tip of the delivery valve holder begins to
increase.
5. Check to see if the timing angle lines on the flywheel is aligned
with the alignment mark (2).
6. If the injection timing is out of adjustment, readjust the timing
with shims.
Injection timing Factory specification
NOTE
• The sealant is applied to both sides of the shims (soft metal
gasket shim). The liquid gasket is not required for
assembling.
• Shims are available in thickness of 0.20 mm (0.0079 in.),
0.25 mm (0.0098 in.) and 0.30 mm (0.012 in.). Combine these
shims for adjustments.
• Addition or reduction of shim (0.05 mm, 0.002 in.) delays or
advances the injection timing by approx. 0.009 rad. (0.5 °).
• In disassembling and replacing the injection pump, be sure
to use the same number of new shims with the same
thickness.
• Refer to figure below to check the thickness of the shims.
(1) Timing Line
(2) Alignment Mark
(3) Shim (Soft Metal Gasket Shim)
Fuel Tightness of Pump Element
1. Remove the engine stop solenoid.
2. Remove the injection pipes and glow plugs.
3. Install the injection pump pressure tester to the injection pump.
4. Install the injection nozzle (1) jetted with the proper injection
pressure to the injection pump pressure tester (2). (Refer to the
figure.)
5. Set the speed control lever to the maximum speed position.
6. Run the starter to increase the pressure.
7. If the pressure can not reach the allowable limit, replace the
pump with new one or repair with a KUBOTA-authorized pump
service shop.
Fuel tightness of pump
Factory specification
element
NOTE
• Never try to disassemble the injection pump assembly. For
repairs, you are strongly requested to contact a
KUBOTA-authorized pump service shop.
(1) Injection Nozzle
(2) Injection Pump Pressure Tester
1-S16
ENGINE
0.32 to 0.34 rad
(18 to 20 °) before T.D.C.
(4) Two-holes: 0.20 mm (0.0079 in.)
(5) One-hole: 0.25 mm (0.0098 in.)
(6) Without hole: 0.30 mm (0.012 in.)
9Y1210595ENS0014US0
13.7 MPa
2
140 kgf/cm
1990 psi
(3) Protection Cover for Jetted Fuel
9Y1210595ENS0015US0
KiSC issued 11, 2013 A