SJN Services - Heavy Machines Repair and Maintenance - Forklift Maintenance - Wheel Loader Repair and Maintenance - Diesel Generators Repair and Maintenance is located in Las Bela, Pakistan on Karachi,. SJN Services - Heavy Machines Repair and Maintenance - Forklift Maintenance - Wheel Loader Repair and Maintenance - Diesel Generators Repair and Maintenance is rated 5 out of 5 in the category diesel engine repair service in Pakistan.