Vehicles with a 90 hp turbocharged diesel engine. (with injection pump LUCAS).
Properly adjusted idle speed is essential for a diesel engine. An engine with incorrectly set speeds runs intermittently at idle or during acceleration. Idling adjustment must be carried out in the following sequence.
1. Carry out a test drive to warm up the engine to operating temperature. After driving, let the engine idle until the radiator fan turns on and off at least two times.
2. Disconnect all consumers of the on-board electrical network (light, air conditioning).
3. Check the idle speed. The nominal value should be 825±25 rpm.
Check of idling and volume of giving of TNVD
The engine must be warmed up to operating temperature.
4. Loosen screw 1 and turn it until the engine idle speed is equal to the nominal value of 825±25 rpm. After that, tighten the locknut of the adjusting screw 1 (see illustration).
5.4 Unlock screw 1 and turn it until the engine idle speed is equal to the nominal value of 825±25 rpm. After that, tighten the locknut of the adjusting screw 1
6. Insert between screw 3 and adjusting lever 2 a gauge or spacer 4 mm thick (see illustration 5.4).
7. Give a few times «Full throttle», and then check the idle speed again. Repeat the adjustment if necessary.
Attention! Mode «Full throttle» do it for no more than five seconds. If the desired idle speed cannot be set, contact the service department.
8. Tighten locknuts of bolts 3 and 1 (see illustration 5.4).
High idle adjustment
Increased idle speed is needed for stable, smooth operation of a cold engine. Increased speed is achieved thanks to the diaphragm valve on the injection pump, triggered by low pressure, installed in the coolant circuit. This valve actuates the corresponding lever on the injection pump via a cable tie.
To perform the adjustment, the engine must be warmed up to operating temperature, and the idle speed must be set correctly.
9. Adjust the gap between the clamp (holder) 5 cable and 4 idle lever (see illustration 5.4). The gap should be 2±1 mm when measured between the cable clamp and the lever. If the specified values are not maintained, then loosen the screw on the clamp and move it in one direction or another.
Checking the maximum engine speed
10. Turn on «Full throttle». The engine must be warmed up to operating temperature. The engine speed should be 4900-5100 rpm.
Attention! Mode «Full throttle» do it for no more than five seconds. If the desired speed cannot be achieved, contact the service department.