SAFARI

4 DLT ENGINE

easure connecting rod bearing bore.

Refer Figure 101

IF CONNECTING ROD BIG END PARENT BORE

DIMENSION IS MAINTAINED WITHIN SPECIFIED

LIMITS, PROPER BEARING BORE DIMENSION IS

AUTOMATICALLY ACHIEVED.

owever it must be physically measured and

confirmed. Measure pretension of connecting rod

bearing shell with feeler gauge after loosening

connecting rod bearing cap mounting nut on opposite

side of bearing shell lug. Refer Figure 102

CONNECTING ROD BEARING SHELL ARE

PRECISION FINISHED AND SHOULD NOT BE

BORED OR SCRAPED.

INSPECTION OF INJECTION NOZZLE

Checking nozzle opening pressure

- Connect injector assembly to nozzle tester.

- Slowly depress nozzle tester lever and read pressure

gauge when nozzle starts opening.

- If opening pressure is not as per specified value,

then adjust as required by selecting proper shims.

Check nozzle for leakage

- Slowly depress nozzle tester lever until pressure

gauge shows 125 bar.The nozzle is leak proof, if no

drop comes out of nozzle tip within 10 seconds.

- Rectify the leak by cleaning the nozzle elements.

eplace nozzle if necessary.

Checking nozzle spray

- Close shut-off valve.

- Depress nozzle tester lever 4 -5 times. The nozzle

will then buzz very softly. The automization is

satisfactory when the jet cone has uniform closed

contour and is finely automized.

Inspection of glow plugs

- Check glow plugs for short circuits and or for burning.

Replace them if necessary.

WATER PUMP

heck water pump for free rotation. Check for water

leakage through leakage hole. It indicates that water

seal is damaged and leaking. Replace the water pump

if necessary.

Dismantling and repairing of water pump is not

recommended.

Fig. 101

Fig. 102

Checking of thermostat element

1. Remove thermostat element from thermostat

housing.

2. Mount thermostat element in suitable fixture and

place the fixture in a vessel filled with water.

3. Fix dial gauge with its spindle on valve surface with

a pretension of 0.5 mm.