Mahindra 3535, Service Manual

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C-101 35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
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
The pump is lubricated by the diesel in FIP.
c. Removal
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.