Service Manual

Weichai America Corp.
Revision: August 2019 8
2. Check the coolant fittings and hoses for leaks.
2.3 NG Shut-Off Valve Assembly and Disassembly
2.3.1 NG Shut-Off Valve Exploded View
Fig. 2-3 Exploded view of electromagnetic valve
2.3.2 NG Shut-Off Valve Disassembly Procedure
1. Remove the bolts and nuts bolting the NG shut-off valve to the gas pipe joint.
2. Remove the bolts and nuts bolting the NG bracket to the NG shut-off valve. Remove the NG
shut-off valve.
3. Remove the O-ring from the groove in the NG shut-off valve.
2.3.3 NG Shut-Off Valve Assembly Procedure
Replace the O-ring and reverse the Disassembly Procedure (2.3.2) to assemble the NG
Electromagnetic Valve.
2.3.4 NG Shut-Off Valve Inspection and Maintenance
The inspection and maintenance of the NG shut-off valve must be performed at a special service
station.
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