Service Manual

Weichai America Corp.
Revision: August 2019 18
Fig. 3-7 Exploded view of signal generator
3.5.2 Signal Generator Disassembly Procedure
1. Remove the connecting bolts of the pump gear and signal generator.
2. Remove the hex nuts between signal generator flange and engine block.
3. Remove the signal generator from the engine.
3.5.3 Signal Generator Assembly Procedure
1. Adjust the crankshaft to TDC: the first cylinder piston should be in its compression stroke.
Tighten the connecting bolts between the pump gear and signal generator.
2. Tighten the hex nuts between signal generator and engine block.
3. Adjust the fluted signal generator disc until its TDC mark points at the center of the speed
sensor and the predetermined ignition angle is reached.
4. Tighten the locknut on the signal generator fluted disc.
5. Tighten the hex nuts on the signal generator cover plate.
3.5.4 Inspection and Maintenance of Signal Generator
1. Check for damage to the signal generator shaft threads.
2. Check that the locknuts of the signal generator fluted disc are tightened and that the ignition
angle of the signal generator is correct.
3. Check for damage to the speed sensor, tooth disc, or housing.
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