Fuel System

Fuel Injection Pump

a.Description

The diesel engine which is a compression ignition engine, utilizes the high temperature of highly compressed air to ignite the injected fuel charge.

Therefore, the fuel must be injected in to the combustion chamber within a precisely defined period of time.

The MICO BOSCH / STANDADYNE VE type rotary pump is flange mounted on the engine through adapter plate, with three studs and spring washers and flat washers and nuts. Refer the calibration chart for calibration if performance deterioration is observed on account of Fuel Injection Pump malfunctioning b.Lubrication of DI engine fuel injection pump c.Removal

The pump is lubricated by the diesel in FIP.

1.Remove the fuel pipe to the injection pump and the return pipe from the injection pump to filter.

2.Remove the injection pipes from the injectors and pump.

NOTE: Disconnecting the pipes at the injection pump and bending the out of the way will cause faulty reassembly. They must be completely removed.

3.Disconnect the throttle rod and fuel shut-off rod at the injection pump.

4.Remove the injection pump gear cover.

5.Remove the nut securing the injection pump gear.

6.Remove the three nuts securing the injection pump to the adapter plate on the crankcase front plate and withdraw the pump.

NOTE: Kindly service your Fuel Injection System from Authorised Dealer before installation.

d.Installation

1.Reverse the removal procedure ensuring that the key in the gear is in engagement with the keyway in the pump flange and that the scribed mark on the pump mounting flange is mid-way between the marks on the crankcase front plate.

2.Bleed the fuel system.

NOTE: Calibration chart of Fuel injection Pump different models are given for your information only.

e.Adjustments

Refer Service Instructions for Fuel Injection Timing Rotary FIP.

f.Fuel Injection Equipment

Normal care and cleanliness are required in handling fuel and fuel injection equipment and some additional points are as follows :

IMPORTANT FACTORS ON PREVENTIVE MAINTENANCE :

(i)Daily drain any water or sludge accumulation from the filters through the drain plug provided in the filter bowl.

(ii)Do not run the vehicle or tractor with low fuel level in the tank to prevent airation in the fuel supply to the pump. It is very important to prevent the pump from running dry as the lubrication to the pump barrels plungers is through diesel oil only.

Ksb Device

This device helps engine for quicker start during the cold ambient temperature.

The KSB timer relay supplies 12 Volt electric current to solenoid. The Solenoid moves “Automatic Timing Device” piston against the spring pressure which increases fuel pressure. This effects advancing of injection timing.

The KSB timer remain “ON” for 20 minutes and run. It is switch “OFF” after 20 minutes restoring the normal timing. The KSB timer relay is switch “ON” everytime the tractor is switch “ON” from “OFF” condition.